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h3{color:var(--heading-color);margin-bottom:1.5rem}.terms-nav-link{color:var(--text-secondary);border-radius:.9rem;align-items:center;gap:.75rem;margin-bottom:.35rem;padding:.9rem 1rem;text-decoration:none;transition:all .25s;display:flex}.terms-nav-link:hover{color:var(--primary-color);background:#3b82f614}.terms-nav-link span{color:var(--primary-color);font-size:.75rem;font-weight:800}.terms-content-area{flex-direction:column;gap:2rem;display:flex}.terms-section{background:var(--card-bg);border:1px solid var(--border-color);border-radius:1.5rem;padding:2rem}.terms-section-header{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.terms-section-number{color:#fff;background:linear-gradient(135deg,#10b981,#3b82f6);border-radius:50%;justify-content:center;align-items:center;width:3rem;height:3rem;font-size:.85rem;font-weight:800;display:flex}.terms-section h2{color:var(--heading-color);margin:0;font-size:1.4rem}.terms-section p{color:var(--text-secondary);margin:0;line-height:2}.terms-help{padding:clamp(5rem,8vw,8rem) 0}.terms-help-card{text-align:center;color:#fff;background:linear-gradient(135deg,#10b981,#3b82f6);border-radius:2rem;padding:clamp(2rem,4vw,4rem);box-shadow:0 25px 60px #10b98140}.terms-help-badge{background:#ffffff26;border:1px solid #ffffff40;border-radius:999px;margin-bottom:1.5rem;padding:.8rem 1rem;font-size:.85rem;font-weight:800;display:inline-flex}.terms-help-card h2{margin:0;font-size:clamp(2rem,5vw,4rem);line-height:1.1}.terms-help-card p{color:#ffffffeb;max-width:60ch;margin:1.5rem auto 2rem;line-height:1.9}.terms-help-btn{color:#10b981;background:#fff;border-radius:1rem;justify-content:center;align-items:center;padding:1rem 1.5rem;font-weight:800;text-decoration:none;transition:all .3s;display:inline-flex}.terms-help-btn:hover{transform:translateY(-4px)}@media 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summary:after{content:"+";background:var(--formula-bg);border:1px solid var(--formula-border);border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;margin-left:auto;font-size:1.25rem;font-weight:900;transition:all .35s;display:flex}.square-faq-item[open] summary:after{content:"−";transform:rotate(180deg)}.faq-answer p{color:var(--text-secondary);margin:0;font-size:1rem;line-height:1.8}.faq-tip{background:var(--formula-bg);border:1px solid var(--formula-border);color:var(--text-primary);border-radius:16px;margin-top:1rem;padding:1rem 1.1rem;font-weight:700}.faq-note{text-align:center;background:linear-gradient(135deg, var(--hero-start), var(--hero-middle), var(--hero-end));color:#fff;border-radius:20px;margin-top:2rem;padding:1.5rem}.faq-note h3{margin:0 0 .75rem;font-size:1.3rem;font-weight:900}.faq-note p{opacity:.95;margin:0}@media (width<=768px){.square-faq-list{margin-top:2rem}.square-faq-item summary{padding:1rem;font-size:.95rem}.square-faq-item 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#fbbf2459}.practice-actions{flex-wrap:wrap;justify-content:center;gap:1rem;margin-top:2rem;display:flex}.practice-btn-primary{min-width:220px;color:var(--roots-start);background:#fff;border-radius:999px;justify-content:center;align-items:center;padding:1rem 1.5rem;font-weight:900;text-decoration:none;transition:all .35s;display:inline-flex}.practice-btn-primary:hover{transform:translateY(-5px);box-shadow:0 15px 35px #0003}.practice-btn-secondary{color:#fff;background:#ffffff1f;border:1px solid #fff3;border-radius:999px;justify-content:center;align-items:center;min-width:220px;padding:1rem 1.5rem;font-weight:800;text-decoration:none;transition:all .35s;display:inline-flex}.practice-btn-secondary:hover{background:#ffffff2e;transform:translateY(-5px)}@keyframes practiceFloat{0%{transform:translateY(0)}50%{transform:translateY(-6px)}to{transform:translateY(0)}}.practice-badge{animation:4s ease-in-out infinite practiceFloat}@media 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0;display:grid}.cube-stat{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1f;border:1px solid #ffffff26;border-radius:24px;padding:1.5rem}.cube-stat strong{font-size:clamp(2rem,4vw,3rem);font-weight:900;display:block}.cube-stat span{margin-top:.5rem;font-size:.9rem;font-weight:700;display:block}.cube-mission-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff1a;border:1px solid #ffffff26;border-radius:30px;padding:2rem}.cube-mission-card h3{margin-bottom:1.5rem;font-size:1.4rem;font-weight:900}.mission-grid div{background:#ffffff14;border:1px solid #ffffff1f;border-radius:18px;padding:1rem;font-weight:700}.cube-hero-visual{flex-direction:column;justify-content:center;align-items:center;display:flex}.cube-display{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffff1f;border:1px solid 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0}.cube-quick-win{text-align:center;border:1px solid var(--border);box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#f9731614,#fb923c14);border-radius:32px;margin-top:3rem;padding:2rem}.cube-win-badge{color:var(--cubes-middle);background:#f973161f;border:1px solid #f9731640;border-radius:999px;padding:.65rem 1rem;font-weight:800;display:inline-flex}.cube-quick-win h3{margin:1rem 0;font-size:clamp(1.5rem,3vw,2rem)}.cube-win-card{background:var(--card-bg);border:2px solid #f9731640;border-radius:24px;max-width:320px;margin:0 auto;padding:1.5rem}.cube-win-card span{font-size:1.4rem;font-weight:700;display:block}.cube-win-card strong{color:var(--cubes-middle);margin-top:.75rem;font-size:3rem;font-weight:900;display:block}.cube-journey{margin-top:3rem}.cube-journey-flow{flex-wrap:wrap;justify-content:center;align-items:center;gap:1.5rem;display:flex}.cube-journey-card{text-align:center;background:var(--card-bg);border:1px solid var(--border);border-top:4px solid var(--cubes-middle);min-width:220px;max-width:280px;box-shadow:var(--shadow-sm);border-radius:28px;flex:1;padding:2rem}.cube-journey-card.success{border-top:4px solid #22c55e}.cube-journey-card strong{color:var(--cubes-middle);margin:.75rem 0;font-size:clamp(2rem,4vw,3rem);font-weight:900;display:block}.cube-arrow{background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle));color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:60px;height:60px;font-size:1.5rem;font-weight:900;display:flex}.cube-visual-box{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;margin-top:3rem;padding:2rem}.cube-visual-box h3{text-align:center;margin-bottom:2rem}.cube-visual-grid{flex-wrap:wrap;justify-content:center;align-items:center;gap:1rem;display:flex}.cube-visual-card{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:24px;min-width:150px;padding:1.5rem}.cube-visual-card strong{color:var(--cubes-middle);margin-top:.75rem;font-size:2rem;font-weight:900;display:block}.cube-visual-card.success{background:#22c55e14;border:1px solid #22c55e33}.cube-examples{margin-top:3rem}.cube-examples-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;display:grid}.cube-example-card{text-align:center;background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:28px;padding:2rem}.cube-example-card span{font-size:1.3rem;font-weight:700;display:block}.cube-example-card strong{color:var(--cubes-middle);margin-top:.75rem;font-size:2.5rem;font-weight:900;display:block}.cube-example-card.featured{background:linear-gradient(135deg, #f973160d, var(--card-bg));border:2px solid #f9731640}.cube-memory-box{text-align:center;color:#fff;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), 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.35s}.cube-wall-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.featured-cube{background:linear-gradient(135deg, #f9731614, var(--card-bg));border:2px solid #f9731633}.cube-wall-card .cube-number{color:var(--text-secondary);font-size:1.3rem;font-weight:700}.cube-wall-card .cube-answer{color:var(--cubes-middle);margin-top:.75rem;font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900}.cube-memory-zone{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;border-radius:36px;margin-top:4rem;padding:3rem}.cube-memory-zone h3{margin-bottom:1rem}.cube-memory-zone p{max-width:700px;margin:0 auto;line-height:1.9}.memory-highlight-grid{grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:2rem;display:grid}.memory-highlight-grid div{background:#ffffff1f;border:1px solid #ffffff26;border-radius:20px;padding:1rem;font-weight:800}@media (width<=768px){.memory-highlight-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=480px){.memory-highlight-grid{grid-template-columns:1fr}}.why-cubes-section{padding:clamp(4rem,8vw,7rem) 0}.cube-benefits-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem;margin-top:3rem;display:grid}.cube-benefit-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:30px;padding:2rem;transition:all .35s}.cube-benefit-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.cube-benefit-card h3{margin-bottom:1rem}.cube-benefit-card p{color:var(--text-secondary);line-height:1.8}.cube-success-box{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;border-radius:36px;margin-top:4rem;padding:3rem}.success-badge{background:#ffffff26;border:1px solid #fff3;border-radius:999px;padding:.75rem 1.25rem;font-weight:800;display:inline-flex}.cube-success-box h3{margin:1.5rem 0}.success-examples{grid-template-columns:repeat(4,1fr);gap:1rem;margin:2rem 0;display:grid}.success-examples div{background:#ffffff1f;border:1px solid #ffffff26;border-radius:20px;padding:1rem;font-weight:900}@media (width<=768px){.success-examples{grid-template-columns:repeat(2,1fr)}}@media (width<=480px){.success-examples{grid-template-columns:1fr}}.cube-patterns-section{padding:clamp(4rem,8vw,7rem) 0}.cube-pattern-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;margin-top:2rem;padding:2rem}.pattern-header{color:var(--cubes-middle);background:#f973161f;border:1px solid #f9731633;border-radius:999px;margin-bottom:1rem;padding:.65rem 1rem;font-weight:800;display:inline-flex}.cube-pattern-card h3{margin-bottom:1rem}.digit-card{text-align:center;background:var(--surface);border-radius:24px;padding:1.5rem}.digit-card strong{color:var(--cubes-middle);margin-top:.75rem;font-size:2rem;display:block}.growth-grid{grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:2rem;display:grid}.growth-card{text-align:center;background:var(--surface);border-radius:24px;padding:1.5rem}.growth-card strong{color:var(--cubes-middle);margin-top:.75rem;font-size:2rem;display:block}.magic-series{flex-wrap:wrap;justify-content:center;gap:1rem;margin:2rem 0;display:flex}.magic-series div{text-align:center;background:#f9731614;border:1px solid #f9731626;border-radius:20px;min-width:90px;padding:1rem;font-weight:900}.cube-memory-rule{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;border-radius:36px;margin-top:3rem;padding:3rem}.memory-rule-grid{grid-template-columns:repeat(4,1fr);gap:1rem;margin:2rem 0;display:grid}.memory-rule-grid div{background:#ffffff1f;border:1px solid #ffffff26;border-radius:20px;padding:1rem;font-weight:900}@media 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#f9731626;border-radius:20px;padding:1rem;font-weight:800}.cube-secret-box{text-align:center;color:#fff;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));border-radius:36px;margin-top:3rem;padding:3rem}.cube-secret-box h3{margin-bottom:1rem}.cube-secret-box p{line-height:1.8}@media (width<=768px){.trick-example{flex-direction:column}}.cube-tricks-section{padding:clamp(4rem,8vw,7rem) 0}.cube-trick-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;margin-top:2rem;padding:2rem;transition:all .3s}.cube-trick-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.trick-header{color:var(--cubes-middle);background:#f973161a;border:1px solid #f9731633;border-radius:999px;align-items:center;margin-bottom:1rem;padding:.65rem 1rem;font-weight:800;display:inline-flex}.cube-trick-card h3{margin-bottom:1rem;font-size:clamp(1.4rem,3vw,2rem)}.cube-trick-card p{color:var(--text-secondary);line-height:1.8}.step-box{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-top:2rem;display:grid}.step-card{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:24px;padding:1.5rem;transition:all .3s}.step-card:hover{transform:translateY(-5px)}.step-card span{color:var(--text-secondary);font-weight:700;display:block}.step-card strong{color:var(--cubes-middle);margin-top:.75rem;font-size:2rem;font-weight:900;display:block}.landmark-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-top:2rem;display:grid}.landmark-grid div{text-align:center;background:linear-gradient(135deg,#f9731614,#0000);border:1px solid #f9731626;border-radius:20px;padding:1rem;font-weight:800}.digit-pattern-grid div{background:var(--surface);border:1px solid 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h3{margin-bottom:2rem;font-size:clamp(1.6rem,4vw,2.4rem)}.secret-points{grid-template-columns:repeat(2,1fr);gap:1rem;display:grid}.secret-points div{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:20px;padding:1rem;font-weight:800}@media (width<=768px){.secret-points{grid-template-columns:1fr}.estimate-flow{flex-direction:column}.estimate-flow span{transform:rotate(90deg)}.cube-secret-box{padding:2rem}}.cube-mistakes-section{padding:clamp(4rem,8vw,7rem) 0}.mistake-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;margin-top:2rem;padding:2rem;transition:all .3s}.mistake-header{color:#ef4444;background:#ef44441a;border:1px solid #ef444433;border-radius:999px;align-items:center;margin-bottom:1rem;padding:.65rem 1rem;font-weight:800;display:inline-flex}.wrong-right{grid-template-columns:repeat(2,1fr);gap:1rem;margin:1.5rem 0;display:grid}.wrong-box{text-align:center;color:#ef4444;background:#ef444414;border:1px solid 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p{line-height:1.9}.safety-checklist{grid-template-columns:repeat(2,1fr);gap:1rem;margin:2rem 0;display:grid}.safety-checklist div{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:20px;padding:1rem;font-weight:700}.final-message{margin-top:2rem;font-size:1.15rem;font-weight:800;line-height:1.8}@media (width<=768px){.wrong-right,.safety-checklist{grid-template-columns:1fr}.mistakes-final-box{padding:2rem}}@media (width<=480px){.mistake-card{padding:1.5rem}.must-know-grid{grid-template-columns:1fr}}.cube-challenge-section{padding:clamp(4rem,8vw,7rem) 0}.challenge-path{justify-content:center;align-items:center;max-width:800px;margin:3rem auto;display:flex}.path-step{background:var(--surface);border:2px solid var(--border);border-radius:50%;justify-content:center;align-items:center;width:60px;height:60px;font-weight:900;display:flex}.path-step.active{background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle));color:#fff}.path-step.boss{color:#fff;background:linear-gradient(135deg,#f59e0b,#f97316)}.path-line{background:var(--border);flex:1;height:4px}.challenge-stages{gap:2rem;display:grid}.challenge-stage{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;padding:2rem}.stage-top{justify-content:space-between;gap:1rem;margin-bottom:1rem;display:flex}.stage-level{color:var(--cubes-middle);font-weight:800}.stage-xp{color:#f59e0b;background:#fbbf241f;border-radius:999px;padding:.5rem 1rem;font-weight:700}.mission-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-top:1.5rem;display:grid}.mission-card{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:24px;padding:1.5rem}.mission-card span{color:var(--text-secondary);font-size:.9rem}.mission-card h4{margin:.75rem 0}.mission-answer{color:var(--cubes-middle);font-size:2rem;font-weight:900}.boss-arena{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;border-radius:40px;margin-top:4rem;padding:4rem 2rem}.boss-crown{font-size:4rem}.boss-tag{background:#ffffff26;border-radius:999px;margin:1rem 0;padding:.75rem 1.5rem;display:inline-block}.boss-question{background:#ffffff1f;border-radius:24px;max-width:700px;margin:2rem auto;padding:2rem;font-size:clamp(1.2rem,3vw,2rem);font-weight:800}.boss-answer{background:#ffffff1f;border-radius:24px;max-width:600px;margin:auto;padding:1.5rem}.cube-achievement{text-align:center;background:var(--card-bg);border:1px solid var(--border);border-radius:36px;margin-top:4rem;padding:3rem}.achievement-icon{font-size:4rem}.achievement-grid{grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:2rem;display:grid}.achievement-grid div{background:var(--surface);border-radius:20px;padding:1rem}@media (width<=768px){.achievement-grid{grid-template-columns:1fr}.stage-top{flex-direction:column}}.cube-faq-section{padding:clamp(4rem,8vw,7rem) 0}.cube-faq-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem;margin-top:3rem;display:grid}.cube-faq-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:28px;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.cube-faq-card:hover{box-shadow:var(--shadow-lg);border-color:#f973164d;transform:translateY(-8px)}.cube-faq-card:before{content:"";background:linear-gradient(90deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));width:100%;height:5px;position:absolute;top:0;left:0}.faq-question{color:var(--text-primary);margin-bottom:1rem;font-size:1.2rem;font-weight:800;line-height:1.5}.faq-answer{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.9}.faq-example{background:#22c55e14;border:1px solid #22c55e26;border-radius:18px;margin-bottom:1rem;padding:1rem}.faq-example span{text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary);margin-bottom:.5rem;font-size:.85rem;display:block}.faq-example strong{color:#22c55e;font-size:1.1rem}.faq-tip{background:#f9731614;border:1px solid #f9731626;border-radius:18px;padding:1rem;font-weight:700;line-height:1.7}.cube-faq-final{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;box-shadow:var(--shadow-lg);border-radius:36px;margin-top:4rem;padding:3rem}.cube-faq-final h3{margin-bottom:1rem;font-size:clamp(1.6rem,4vw,2.5rem)}.cube-faq-final p{max-width:700px;margin:0 auto;font-size:1.05rem;line-height:1.9}@media (width<=768px){.cube-faq-grid{grid-template-columns:1fr}.cube-faq-card{padding:1.5rem}.cube-faq-final{padding:2rem}}.cube-practice-section{padding:clamp(4rem,8vw,7rem) 0}.cube-practice-card{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;box-shadow:var(--shadow-lg);border-radius:40px;padding:clamp(2rem,5vw,4rem);position:relative;overflow:hidden}.practice-badge{background:#ffffff26;border:1px solid #fff3;border-radius:999px;justify-content:center;align-items:center;padding:.75rem 1.25rem;font-weight:800;display:inline-flex}.cube-practice-card h2{margin:1.5rem 0 1rem;font-size:clamp(2rem,5vw,3.5rem)}.cube-practice-card p{max-width:750px;margin:0 auto;line-height:1.9}.practice-stats{grid-template-columns:repeat(3,1fr);gap:1rem;margin:3rem 0;display:grid}.practice-stat{background:#ffffff1a;border:1px solid #ffffff26;border-radius:24px;padding:1.5rem}.practice-stat strong{font-size:2rem;font-weight:900;display:block}.practice-stat span{font-size:.95rem}.practice-actions{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.primary-action,.secondary-action{border-radius:999px;padding:1rem 1.75rem;font-weight:800;text-decoration:none;transition:all .3s}.primary-action{color:var(--cubes-middle);background:#fff}.primary-action:hover{transform:translateY(-4px)}.secondary-action{color:#fff;border:1px solid #ffffff40}.secondary-action:hover{background:#ffffff14}.journey-path{justify-content:center;align-items:center;max-width:700px;margin:3rem auto;display:flex}.journey-node{background:#ffffff1f;border:1px solid #ffffff26;border-radius:999px;padding:.85rem 1.25rem;font-weight:700}.journey-node.active{color:var(--cubes-middle);background:#fff}.journey-node.next{background:#ffffff38}.journey-line{background:#ffffff40;flex:1;height:3px}.practice-message{font-size:1.05rem;font-weight:700}@media (width<=768px){.practice-stats{grid-template-columns:1fr}.journey-path{flex-direction:column;gap:1rem}.journey-line{width:3px;height:40px}}.related-topics-section{padding:clamp(4rem,8vw,7rem) 0}.topic-path-card{color:inherit;background:var(--card-bg);border:1px solid var(--border);border-radius:32px;padding:2rem;text-decoration:none;transition:all 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#22c55e26;border-radius:20px;padding:1.5rem;font-weight:700;line-height:1.9}.cube-root-secret-box{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;box-shadow:var(--shadow-lg);border-radius:40px;margin-top:4rem;padding:3rem}.cube-root-secret-box h3{margin-bottom:2rem}.secret-steps{grid-template-columns:repeat(4,1fr);gap:1rem;display:grid}.secret-steps div{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:20px;padding:1.25rem;font-weight:800}.secret-final{margin-top:2rem;font-size:1.1rem;font-weight:700;line-height:1.8}@media (width<=992px){.walkthrough-box,.secret-steps{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.walkthrough-box,.mcq-options,.secret-steps{grid-template-columns:1fr}.cube-root-trick-card,.cube-root-secret-box{padding:2rem}}@media 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#f9731626;border-radius:40px;margin-top:4rem;padding:3rem}.example-badge{background:#f973161f;border:1px solid #f973162e;border-radius:999px;justify-content:center;align-items:center;margin-bottom:1rem;padding:.65rem 1rem;font-weight:800;display:inline-flex}.mistake-example-box h3{margin-bottom:1rem}.mistake-example-box>p{color:var(--text-secondary);margin-bottom:2rem}.example-grid{grid-template-columns:repeat(2,1fr);gap:1.5rem;display:grid}.example-card{border-radius:24px;padding:2rem}.example-card h4{margin-bottom:1rem}.example-card p{line-height:1.9}.example-card.wrong{background:#ef444414;border:1px solid #ef444426}.example-card.right{background:#22c55e14;border:1px solid #22c55e26}.golden-rule-box{text-align:center;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));color:#fff;box-shadow:var(--shadow-lg);border-radius:40px;margin-top:4rem;padding:3rem}.golden-rule-box h3{margin-bottom:2rem}.golden-rule{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:24px;flex-wrap:wrap;justify-content:center;align-items:center;gap:1rem;margin-bottom:2rem;padding:1.5rem;font-size:1.05rem;font-weight:800;display:flex}.golden-rule-box p{max-width:700px;margin:0 auto;line-height:1.9}@media (width<=768px){.mistakes-grid,.example-grid{grid-template-columns:1fr}.mistake-example-box,.golden-rule-box{padding:2rem}}@media (width<=480px){.mistake-card{padding:1.5rem}.golden-rule{flex-direction:column;gap:.75rem}}.cube-root-challenge-section{padding:clamp(4rem,8vw,7rem) 0}.cube-root-level{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;margin-top:2.5rem;padding:2rem}.cube-root-level-header{align-items:center;gap:1.5rem;margin-bottom:2rem;display:flex}.cube-root-level-badge{color:#fff;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle));min-width:120px;box-shadow:var(--shadow-sm);border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;padding:1rem 1.25rem;font-weight:800;display:inline-flex}.cube-root-level-content{flex:1}.cube-root-level-content h3{margin:0 0 .5rem}.cube-root-level-content p{color:var(--text-secondary);margin:0;line-height:1.8}.cube-root-grid{grid-template-columns:repeat(3,1fr);gap:1.25rem;display:grid}.cube-root-card{background:var(--surface);border:1px solid var(--border);border-radius:24px;transition:all .3s;overflow:hidden}.cube-root-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-5px)}.cube-root-card summary{cursor:pointer;padding:1.25rem;font-weight:700;list-style:none;position:relative}.cube-root-card summary::-webkit-details-marker{display:none}.cube-root-card summary:after{content:"+";color:var(--cubes-middle);font-size:1.4rem;font-weight:900;position:absolute;top:50%;right:1rem;transform:translateY(-50%)}.cube-root-card[open] summary:after{content:"−"}.cube-root-answer{color:#22c55e;padding:0 1.25rem 1.25rem;font-weight:800}.cube-root-boss{text-align:center;color:#fff;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle), var(--cubes-end));box-shadow:var(--shadow-lg);border-radius:40px;margin-top:4rem;padding:3rem}.cube-root-boss-badge{background:#ffffff26;border:1px solid #fff3;border-radius:999px;justify-content:center;align-items:center;margin-bottom:1rem;padding:.75rem 1.5rem;font-weight:800;display:inline-flex}.cube-root-boss h3{margin-bottom:.75rem}.cube-root-boss p{opacity:.95}.cube-root-boss-question{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:28px;max-width:700px;margin:2rem auto;padding:2rem}.cube-root-boss-question span{opacity:.9;margin-bottom:.75rem;display:block}.cube-root-boss-question strong{font-size:clamp(1.4rem,4vw,2rem)}.cube-root-boss-answer{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:24px;max-width:700px;margin:0 auto;overflow:hidden}.cube-root-boss-answer summary{cursor:pointer;padding:1.25rem;font-weight:800;list-style:none}.cube-root-boss-answer summary::-webkit-details-marker{display:none}.cube-root-boss-answer div{padding:0 1.5rem 1.5rem;line-height:1.9}.cube-root-boss-answer strong{margin-top:1rem;font-size:1.2rem;display:block}.cube-root-achievement{text-align:center;background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:40px;margin-top:4rem;padding:3rem}.cube-root-achievement-icon{margin-bottom:1rem;font-size:4rem}.cube-root-achievement h3{margin-bottom:1rem}.cube-root-achievement p{max-width:700px;color:var(--text-secondary);margin:0 auto 2rem;line-height:1.9}.cube-root-achievement-badge{color:#fff;background:linear-gradient(135deg, var(--cubes-start), var(--cubes-middle));border-radius:999px;justify-content:center;align-items:center;padding:1rem 1.5rem;font-weight:800;display:inline-flex}@media 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summary::-webkit-details-marker{display:none}.cube-root-faq-card summary:after{content:"+";color:var(--cubes-middle);font-size:1.5rem;font-weight:900;position:absolute;top:50%;right:1.25rem;transform:translateY(-50%)}.cube-root-faq-card[open] summary:after{content:"−"}.cube-root-faq-content{padding:0 1.5rem 1.5rem}.cube-root-faq-content p{color:var(--text-secondary);margin-bottom:1rem;line-height:1.9}.cube-root-faq-example{background:#3b82f614;border:1px solid #3b82f61f;border-radius:18px;padding:1rem 1.25rem;line-height:1.8}.cube-root-faq-example strong{color:var(--cubes-middle);margin-bottom:.4rem;display:block}.cube-root-faq-bottom{text-align:center;background:linear-gradient(135deg,#6366f114,#3b82f614);border:1px solid #6366f11f;border-radius:36px;margin-top:4rem;padding:3rem}.cube-root-faq-bottom h3{margin-bottom:1rem}.cube-root-faq-bottom p{max-width:700px;color:var(--text-secondary);margin:0 auto;line-height:1.9}@media 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var(--cubes-middle));color:#fff;border:none}.cube-root-roadmap-arrow{color:var(--cubes-middle);font-size:1.25rem;font-weight:900}.cube-root-related-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}.cube-root-topic-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;padding:2rem;transition:all .3s;position:relative}.cube-root-topic-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.cube-root-topic-level{background:#6366f11a;border-radius:999px;padding:.4rem .8rem;font-size:.75rem;font-weight:800;position:absolute;top:1rem;right:1rem}.cube-root-topic-icon{margin-bottom:1rem;font-size:2.75rem}.cube-root-topic-card h3{margin-bottom:.75rem}.cube-root-topic-card p{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.8}.cube-root-topic-btn{color:#fff;background:linear-gradient(135deg, var(--cubes-start), 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p{color:var(--text-secondary)}.percentage-memory-box{text-align:center;background:linear-gradient(135deg,#10b98114,#06b6d414);border:1px solid #10b9811f;border-radius:36px;margin-top:4rem;padding:3rem}.percentage-memory-box h3{margin-bottom:2rem}.memory-grid{grid-template-columns:repeat(4,1fr);gap:1rem;display:grid}.memory-grid div{background:var(--card-bg);border:1px solid var(--border);border-radius:20px;padding:1.25rem;font-weight:800}@media (width<=992px){.percentage-examples-grid{grid-template-columns:1fr}.memory-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.percentage-story-card{text-align:center;flex-direction:column}.percentage-formula-box,.percentage-memory-box{padding:2rem}}@media (width<=480px){.memory-grid{grid-template-columns:1fr}}.percentage-chart-section{padding:clamp(4rem,8vw,7rem) 0}.percentage-chart-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;margin-top:3rem;display:grid}.percentage-chart-card{text-align:center;background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:32px;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.percentage-chart-card:before{content:"";opacity:0;background:linear-gradient(135deg,#10b9810a,#14b8a60a,#06b6d40a);transition:all .35s;position:absolute;inset:0}.percentage-chart-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.percentage-chart-card:hover:before{opacity:1}.chart-percent{z-index:2;background:linear-gradient(135deg,#10b981,#14b8a6);color:#0000;-webkit-background-clip:text;background-clip:text;margin-bottom:.75rem;font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900;position:relative}.chart-arrow{z-index:2;color:var(--text-secondary);margin:.5rem 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#22c55e26;border-radius:18px;padding:1rem 1.25rem;font-size:1.4rem;font-weight:900}.example-flow span{color:#16a34a;font-size:1.5rem;font-weight:900}@media (width<=768px){.friendly-lab{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}}@media (width<=580px){.friendly-lab{grid-template-columns:1fr}.friendly-card{border-radius:24px;padding:1.25rem}.friendly-rule-box{border-radius:24px;padding:2rem 1.25rem}.friendly-example{border-radius:24px;padding:1.25rem}.example-flow{flex-direction:column}}.compensation-section{padding:clamp(5rem,8vw,8rem) 0;position:relative;overflow:hidden}.compensation-section:before{content:"";background:radial-gradient(circle,#f59e0b14,#0000 70%);border-radius:50%;width:900px;height:900px;position:absolute;top:-450px;right:-350px}.compensation-section:after{content:"";background:radial-gradient(circle,#3b82f614,#0000 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strong{font-size:clamp(2rem,4vw,3rem);font-weight:900;line-height:1.1;display:block}.demo-step.smart{background:linear-gradient(135deg,#22c55e1a,#22c55e0a);border-color:#22c55e33}.demo-step.smart:before{content:"⚡";opacity:.25;position:absolute;top:.8rem;right:1rem}.demo-step.adjust{background:linear-gradient(135deg,#f973161a,#f973160a);border-color:#f9731633}.demo-arrow{color:#f59e0b;font-size:2rem;font-weight:900}.demo-final{text-align:center;color:#fff;background:linear-gradient(135deg,#16a34a,#22c55e);border-radius:999px;min-width:260px;padding:1.25rem 2rem;font-size:clamp(2rem,5vw,3rem);font-weight:900;box-shadow:0 20px 40px #22c55e40}.compensation-rule{text-align:center;background:linear-gradient(135deg,#0f172a,#78350f,#92400e);border-radius:36px;margin-top:4rem;padding:clamp(2rem,5vw,4rem);position:relative;overflow:hidden}.compensation-rule:before{content:"⚖️";opacity:.04;font-size:clamp(10rem,20vw,18rem);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.rule-badge{color:#fff;background:#ffffff14;border-radius:999px;justify-content:center;align-items:center;margin-bottom:1rem;padding:.8rem 1.2rem;font-weight:800;display:inline-flex}.compensation-rule p{color:#ffffffe6;max-width:700px;margin:0 auto;line-height:1.9}.compensation-examples{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem;margin-top:4rem;display:grid}.example-card{text-align:center;border:1px solid var(--border);background:#ffffff0a;border-radius:24px;padding:1.5rem}.example-card strong{margin-bottom:.75rem;font-size:1.4rem;display:block}.example-card span{color:#16a34a;font-weight:700}@media 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div{color:#16a34a;font-size:1.2rem;font-weight:700}.breaking-arrow{color:#8b5cf6;font-size:2rem;font-weight:900}.breaking-rule{text-align:center;background:linear-gradient(135deg,#4c1d95,#5b21b6,#6d28d9);border-radius:40px;margin-top:4rem;padding:clamp(2rem,5vw,4rem);position:relative;overflow:hidden}.breaking-rule:before{content:"🧩";opacity:.04;font-size:clamp(10rem,20vw,18rem);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.rule-chip{color:#fff;background:#ffffff14;border-radius:999px;margin-bottom:1rem;padding:.8rem 1.2rem;font-weight:800;display:inline-flex}.breaking-rule p{color:#ffffffe6;max-width:700px;margin:0 auto;line-height:1.9}.breaking-examples{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem;margin-top:4rem;display:grid}.breaking-example-card{text-align:center;border:1px solid var(--border);background:#ffffff0a;border-radius:24px;padding:1.75rem;transition:all 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.35s;position:relative;overflow:hidden}.real-life-card:hover{border-color:#0ea5e940;transform:translateY(-10px);box-shadow:0 25px 50px #00000014}.real-life-card:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#ffffff14,#0000 50%);position:absolute;inset:0}.real-life-icon{background:linear-gradient(135deg,#0ea5e91f,#10b98114);border:1px solid #0ea5e926;border-radius:24px;justify-content:center;align-items:center;width:80px;height:80px;margin-bottom:1.25rem;font-size:2rem;display:flex}.real-life-card h3{margin-bottom:1rem;font-size:1.35rem}.real-life-situation{background:#0ea5e90f;border:1px solid #0ea5e91f;border-radius:18px;margin-bottom:1rem;padding:1rem;font-size:1.15rem;font-weight:800}.real-life-card p{color:var(--text-secondary);margin:0;line-height:1.8}.real-life-mastery{text-align:center;background:linear-gradient(135deg,#0f172a,#0c4a6e,#065f46);border-radius:40px;margin-top:4rem;padding:clamp(2rem,5vw,4rem);position:relative;overflow:hidden}.real-life-mastery:before{content:"🌍";opacity:.04;font-size:clamp(10rem,20vw,18rem);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.mastery-badge{color:#fff;background:#ffffff14;border-radius:999px;justify-content:center;align-items:center;margin-bottom:1rem;padding:.8rem 1.2rem;font-weight:800;display:inline-flex}.real-life-mastery h3{color:#fff;margin-bottom:1rem;font-size:clamp(2rem,4vw,3rem)}.real-life-mastery p{color:#ffffffeb;max-width:700px;margin:0 auto;line-height:1.9}@media (width<=992px){.real-life-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media 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.35s;position:relative;overflow:hidden}.arena-card:hover{border-color:#a855f740;transform:translateY(-10px);box-shadow:0 25px 50px #00000014}.arena-card:before{content:"";background:linear-gradient(90deg,#8b5cf6,#a855f7);height:5px;position:absolute;inset:0 0 auto}.arena-card:after{content:"🏆";opacity:.04;font-size:5rem;position:absolute;top:.5rem;right:.75rem}.arena-level{color:#8b5cf6;background:#a855f714;border-radius:999px;justify-content:center;align-items:center;gap:.5rem;padding:.7rem 1rem;font-size:.85rem;font-weight:800;display:inline-flex}.arena-question{margin:1.75rem 0;font-size:clamp(1.8rem,4vw,2.5rem);font-weight:900;line-height:1.1}.arena-mission{color:#16a34a;background:#22c55e14;border:1px solid #22c55e1f;border-radius:18px;margin-bottom:1.25rem;padding:.9rem 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(width<=992px){.arena-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=768px){.arena-grid{grid-template-columns:1fr}.arena-card{border-radius:24px;padding:1.5rem}.arena-final-box{border-radius:24px;padding:2rem 1.25rem}}.mental-addition-faq-section{padding:clamp(5rem,8vw,8rem) 0;position:relative;overflow:hidden}.mental-addition-faq-section:before{content:"";background:radial-gradient(circle,#3b82f614,#0000 70%);border-radius:50%;width:900px;height:900px;position:absolute;top:-450px;right:-350px}.mental-addition-faq-section:after{content:"";background:radial-gradient(circle,#8b5cf614,#0000 70%);border-radius:50%;width:700px;height:700px;position:absolute;bottom:-250px;left:-250px}.faq-item{border:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffff0a;border-radius:24px;transition:all .3s;position:relative;overflow:hidden}.faq-item:hover{border-color:#3b82f633;transform:translateY(-2px)}.faq-item summary{cursor:pointer;padding:1.5rem 4rem 1.5rem 1.5rem;font-size:1.05rem;font-weight:800;line-height:1.5;list-style:none;position:relative}.faq-item summary:after{content:"+";color:#2563eb;background:#3b82f614;border-radius:50%;justify-content:center;align-items:center;width:38px;height:38px;font-size:1.4rem;font-weight:900;transition:all .3s;display:flex;position:absolute;top:50%;right:1.5rem;transform:translateY(-50%)}.faq-item[open]{border-color:#3b82f640}.faq-item[open] summary:after{content:"−";color:#16a34a;background:#22c55e1a}.faq-item p{color:var(--text-secondary);margin:0;padding:0 1.5rem 1.5rem;line-height:1.9}.mental-addition-faq-section .section-header{position:relative}.mental-addition-faq-section .section-header:after{content:"❓";opacity:.04;font-size:clamp(5rem,10vw,8rem);position:absolute;top:-30px;right:10%}.faq-list:after{content:"Still have questions? Practice is the fastest way to improve mental addition.";text-align:center;background:linear-gradient(135deg,#3b82f614,#8b5cf614);border:1px solid #3b82f61f;border-radius:24px;margin-top:2rem;padding:1.5rem;font-weight:700;display:block}@media (width<=768px){.faq-item{border-radius:20px}.faq-item summary{padding:1.25rem 3.5rem 1.25rem 1.25rem;font-size:1rem}.faq-item p{padding:0 1.25rem 1.25rem}}@media (width<=580px){.faq-list{margin-top:3rem}.faq-item summary:after{width:34px;height:34px;right:1rem}}.related-topics-section{padding:clamp(5rem,8vw,8rem) 0;position:relative;overflow:hidden}.related-topics-section:before{content:"";background:radial-gradient(circle,#22c55e14,#0000 70%);border-radius:50%;width:900px;height:900px;position:absolute;top:-450px;right:-350px}.related-topics-section:after{content:"";background:radial-gradient(circle,#8b5cf614,#0000 70%);border-radius:50%;width:700px;height:700px;position:absolute;bottom:-250px;left:-250px}.related-topics-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem;margin-top:4rem;display:grid}.related-topic-card{color:inherit;border:1px solid var(--border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffff0a;border-radius:30px;padding:2rem;text-decoration:none;transition:all .35s;position:relative;overflow:hidden}.related-topic-card:hover{transform:translateY(-10px);box-shadow:0 25px 50px #00000014}.related-topic-card:before{content:"";width:100%;height:5px;position:absolute;top:0;left:0}.related-topic-card.subtraction:before{background:linear-gradient(90deg,#3b82f6,#06b6d4)}.related-topic-card.multiplication:before{background:linear-gradient(90deg,#8b5cf6,#6366f1)}.related-topic-card.division:before{background:linear-gradient(90deg,#f59e0b,#f97316)}.related-topic-card.hub:before{background:linear-gradient(90deg,#22c55e,#16a34a)}.topic-icon{background:#ffffff0d;border:1px solid #ffffff14;border-radius:24px;justify-content:center;align-items:center;width:80px;height:80px;margin-bottom:1.25rem;font-size:2rem;display:flex}.related-topic-card h3{margin-bottom:.85rem;font-size:1.4rem}.related-topic-card p{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.8}.topic-arrow{color:var(--primary);align-items:center;gap:.4rem;font-weight:800;transition:all .3s;display:inline-flex}.related-topic-card:hover 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div{border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-weight:var(--fw-medium);background:#ffffff1f;border:1px solid #ffffff26;padding:.85rem 1rem}.mental-subtraction-actions{flex-wrap:wrap;gap:1rem;margin-top:.5rem;display:flex}.subtraction-primary-btn{border-radius:var(--radius-pill);color:var(--subtraction-start);font-weight:var(--fw-bold);box-shadow:var(--shadow-md);background:#fff;justify-content:center;align-items:center;padding:1rem 1.5rem;display:inline-flex}.subtraction-primary-btn:hover{transform:translateY(-3px)}.subtraction-secondary-btn{border-radius:var(--radius-pill);color:#fff;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff1f;border:1px solid #ffffff2e;justify-content:center;align-items:center;padding:1rem 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li:before{content:"•";font-size:1.25rem}.mindset-center{justify-content:center;align-items:center;display:flex}.vs-circle{background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-end));color:#fff;width:5rem;height:5rem;font-size:1.2rem;font-weight:var(--fw-extrabold);box-shadow:0 0 30px var(--subtraction-glow);border-radius:50%;justify-content:center;align-items:center;display:flex}.mindset-conclusion{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));color:#fff;max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:2rem}.mindset-conclusion strong{margin-bottom:.75rem;font-size:clamp(1.3rem,2vw,1.8rem);display:block}@media (width<=900px){.mindset-vs-grid{grid-template-columns:1fr;gap:1.5rem}.vs-circle{width:4rem;height:4rem}.mindset-card{padding:1.5rem}.mindset-card h3{font-size:2rem}}.difference-thinking{background:linear-gradient(180deg, transparent, 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1.5rem}.journey-step.success{color:#16a34a;background:#22c55e14;border-color:#22c55e}.journey-arrow{font-size:2rem;font-weight:var(--fw-extrabold);color:#22c55e}.difference-answer{border-radius:var(--radius-pill);color:#fff;font-size:1.25rem;font-weight:var(--fw-bold);background:linear-gradient(135deg,#16a34a,#22c55e);justify-content:center;align-items:center;padding:1rem 2rem;display:inline-flex;box-shadow:0 10px 25px #22c55e40}.difference-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:3rem;display:grid}.difference-card{text-align:center;border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);padding:2rem;transition:transform .3s}.difference-card:hover{transform:translateY(-8px)}.difference-card h3{margin-bottom:1rem;font-size:1.8rem}.difference-card p{margin-bottom:1rem}.difference-card strong{color:#16a34a;font-size:1.15rem;font-weight:var(--fw-bold);display:block}.difference-tip{text-align:center;border-radius:var(--radius-xl);color:#fff;max-width:850px;box-shadow:var(--shadow-md);background:linear-gradient(135deg,#16a34a,#22c55e);margin:0 auto;padding:2.5rem}.difference-tip h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.5rem,3vw,2rem)}.difference-tip p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=900px){.difference-grid{grid-template-columns:1fr}.difference-example{padding:1.5rem}.journey-step{min-width:90px;font-size:1.5rem}.journey-arrow{font-size:1.5rem}.difference-question{font-size:2rem}}.counting-up-method{background:linear-gradient(180deg, transparent, var(--section-medium));position:relative}.ladder-showcase{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);max-width:900px;box-shadow:var(--shadow-sm);text-align:center;margin:0 auto 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#2563eb33}.ladder-result{border-radius:var(--radius-pill);color:#fff;font-size:1.25rem;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);justify-content:center;align-items:center;padding:1rem 2rem;display:inline-flex;box-shadow:0 12px 25px #22c55e40}.counting-explanation{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:3rem;display:grid}.explanation-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);text-align:center;padding:2rem;transition:transform .3s,box-shadow .3s}.explanation-card:hover{box-shadow:var(--shadow-md);transform:translateY(-8px)}.explanation-card h3,.explanation-card p{margin-bottom:1rem}.explanation-card strong{color:#2563eb}.counting-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:3rem;display:grid}.counting-example{text-align:center;border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);padding:2rem;transition:transform .3s}.counting-example:hover{transform:translateY(-8px)}.counting-example h3{margin-bottom:1rem}.counting-example strong{color:#16a34a;font-size:1.15rem}.counting-rule{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));color:#fff;max-width:850px;box-shadow:var(--shadow-md);margin:0 auto;padding:2.5rem}.counting-rule h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.4rem,3vw,2rem)}.counting-rule p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=900px){.counting-explanation,.counting-grid{grid-template-columns:1fr}.ladder-showcase{padding:1.5rem}.ladder-step{width:100%;max-width:240px}.ladder-problem{font-size:2rem}}.compensation-method{background:linear-gradient(180deg, transparent, var(--section-light));position:relative}.compensation-showcase{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);max-width:1100px;box-shadow:var(--shadow-sm);text-align:center;margin:0 auto 4rem;padding:3rem}.compensation-problem{font-size:clamp(2rem,4vw,3.5rem);font-weight:var(--fw-extrabold);margin-bottom:3rem}.compensation-flow{flex-wrap:wrap;justify-content:center;align-items:center;gap:1.5rem;display:flex}.flow-card{border-radius:var(--radius-xl);background:var(--card-bg);border:2px solid var(--border);min-width:220px;font-size:1.4rem;font-weight:var(--fw-bold);padding:1.5rem;transition:transform .3s,box-shadow .3s}.flow-card:hover{box-shadow:var(--shadow-md);transform:translateY(-6px)}.flow-card.friendly{color:#2563eb;background:#3b82f614;border-color:#3b82f640}.flow-card.answer{color:#16a34a;background:#22c55e1a;border-color:#22c55e40}.flow-arrow{background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));color:#fff;width:60px;height:60px;font-size:1.5rem;font-weight:var(--fw-bold);box-shadow:0 10px 25px var(--subtraction-glow);border-radius:50%;justify-content:center;align-items:center;display:flex}.compensation-patterns{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:3rem;display:grid}.pattern-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);padding:2rem;transition:transform .3s,box-shadow .3s;position:relative}.pattern-card:hover{box-shadow:var(--shadow-md);transform:translateY(-8px)}.pattern-card h3{color:var(--subtraction-middle);margin-bottom:1rem;font-size:1.15rem}.pattern-card strong{margin-bottom:.75rem;font-size:1.4rem;display:block}.pattern-card p{font-weight:var(--fw-medium)}.compensation-rule{border-radius:var(--radius-xl);text-align:center;background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));color:#fff;max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:2.5rem}.compensation-rule h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.4rem,3vw,2rem)}.compensation-rule p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=900px){.compensation-patterns{grid-template-columns:1fr}.compensation-showcase{padding:1.5rem}.compensation-flow{flex-direction:column}.flow-card{width:100%}.flow-arrow{transform:rotate(90deg)}.compensation-problem{font-size:2rem}}.breaking-numbers-method{background:linear-gradient(180deg, transparent, var(--section-medium));position:relative}.breaking-showcase{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);max-width:1000px;box-shadow:var(--shadow-sm);margin:0 auto 4rem;padding:3rem}.breaking-problem{text-align:center;font-size:clamp(2rem,4vw,3.5rem);font-weight:var(--fw-extrabold);margin-bottom:3rem}.breaking-flow{flex-direction:column;align-items:center;gap:1rem;margin-bottom:2rem;display:flex}.breaking-step{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--card-bg), var(--section-light));border:1px solid var(--border);width:100%;max-width:450px;padding:2rem;transition:transform .3s,box-shadow .3s}.breaking-step:hover{box-shadow:var(--shadow-md);transform:translateY(-6px)}.breaking-step span{border-radius:var(--radius-pill);color:var(--primary);font-size:.85rem;font-weight:var(--fw-semibold);background:#6366f11a;margin-bottom:1rem;padding:.5rem .9rem;display:inline-block}.breaking-step strong{font-size:clamp(1.5rem,3vw,2rem);font-weight:var(--fw-bold);margin-bottom:.75rem;display:block}.breaking-step p{font-size:1.25rem;font-weight:var(--fw-bold);color:#16a34a}.breaking-arrow{font-size:2rem;font-weight:var(--fw-extrabold);color:var(--subtraction-middle)}.breaking-answer{border-radius:var(--radius-pill);color:#fff;max-width:300px;font-size:1.3rem;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);justify-content:center;align-items:center;margin:0 auto;padding:1rem 2rem;display:flex;box-shadow:0 12px 25px #22c55e40}.breaking-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:3rem;display:grid}.breaking-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);text-align:center;padding:2rem;transition:transform .3s,box-shadow .3s}.breaking-card:hover{box-shadow:var(--shadow-md);transform:translateY(-8px)}.breaking-card h3{margin-bottom:1rem;font-size:1.5rem}.breaking-card p{margin-bottom:1rem}.breaking-card strong{color:#16a34a;font-size:1.2rem;font-weight:var(--fw-bold)}.breaking-rule{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));color:#fff;max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:2.5rem}.breaking-rule h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.4rem,3vw,2rem)}.breaking-rule p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=900px){.breaking-grid{grid-template-columns:1fr}.breaking-showcase,.breaking-step{padding:1.5rem}.breaking-problem{font-size:2rem}}.subtraction-speed-tricks{background:linear-gradient(180deg, transparent, var(--section-light));position:relative}.tricks-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:4rem;display:grid}.trick-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:2rem;transition:transform .35s,box-shadow .35s;position:relative;overflow:hidden}.trick-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.trick-card:before{content:"";background:linear-gradient(90deg, var(--subtraction-start), var(--subtraction-end));width:100%;height:4px;position:absolute;top:0;left:0}.trick-level{border-radius:var(--radius-pill);color:var(--subtraction-middle);font-size:.85rem;font-weight:var(--fw-semibold);background:#ef444414;justify-content:center;align-items:center;margin-bottom:1rem;padding:.5rem .85rem;display:inline-flex}.trick-card h3{text-align:center;margin-bottom:1.25rem;font-size:1.75rem}.trick-flow{border-radius:var(--radius-lg);text-align:center;background:var(--section-light);border:1px dashed var(--border-strong);font-weight:var(--fw-semibold);color:var(--text-secondary);margin-bottom:1.25rem;padding:1rem}.trick-card strong{border-radius:var(--radius-lg);color:#fff;font-size:1.2rem;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);justify-content:center;align-items:center;padding:.85rem;display:flex;box-shadow:0 10px 25px #22c55e2e}.speed-summary{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:3rem}.speed-summary h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.5rem,3vw,2rem)}.speed-summary p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=992px){.tricks-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.tricks-grid{grid-template-columns:1fr}.trick-card{padding:1.5rem}.speed-summary{padding:2rem 1.5rem}.trick-card h3{font-size:1.5rem}}.subtraction-real-life{background:linear-gradient(180deg, transparent, var(--section-light));position:relative}.real-life-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:4rem;display:grid}.life-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:2rem;transition:transform .35s,box-shadow .35s;position:relative;overflow:hidden}.life-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.life-card:before{content:"";background:linear-gradient(90deg, var(--subtraction-start), var(--subtraction-end));width:100%;height:4px;position:absolute;top:0;left:0}.life-icon{background:#ef444414;border:1px solid #ef44441f;border-radius:50%;justify-content:center;align-items:center;width:4rem;height:4rem;margin-bottom:1rem;font-size:1.8rem;display:flex}.life-card h3{margin-bottom:1rem;font-size:1.3rem}.life-problem{border-radius:var(--radius-lg);background:var(--section-light);border:1px dashed var(--border);text-align:center;font-size:1.2rem;font-weight:var(--fw-bold);margin-bottom:1rem;padding:1rem}.life-method{border-radius:var(--radius-pill);color:#2563eb;font-size:.85rem;font-weight:var(--fw-semibold);background:#3b82f61a;justify-content:center;align-items:center;margin-bottom:1rem;padding:.5rem .9rem;display:inline-flex}.life-answer{border-radius:var(--radius-lg);color:#fff;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);justify-content:center;align-items:center;padding:.85rem;display:flex;box-shadow:0 10px 20px #22c55e2e}.shopping .life-icon{background:#22c55e1a}.banking .life-icon{background:#3b82f61a}.travel .life-icon{background:#f973161a}.business .life-icon{background:#a855f71a}.exam .life-icon{background:#ec48991a}.daily .life-icon{background:#0ea5e91a}.real-life-conclusion{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:3rem}.real-life-conclusion h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.5rem,3vw,2rem)}.real-life-conclusion p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=992px){.real-life-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.real-life-grid{grid-template-columns:1fr}.life-card{padding:1.5rem}.real-life-conclusion{padding:2rem 1.5rem}}.subtraction-battle-arena{background:linear-gradient(180deg, transparent, var(--section-medium));position:relative}.arena-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:4rem;display:grid}.arena-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:2rem;transition:transform .35s,box-shadow .35s;position:relative;overflow:hidden}.arena-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.arena-card:before{content:"";background:linear-gradient(90deg, var(--subtraction-start), var(--subtraction-end));width:100%;height:4px;position:absolute;top:0;left:0}.arena-rank{border-radius:var(--radius-pill);color:var(--subtraction-middle);font-size:.85rem;font-weight:var(--fw-semibold);background:#ef444414;justify-content:center;align-items:center;margin-bottom:1rem;padding:.5rem .9rem;display:inline-flex}.arena-card h3{margin-bottom:1rem;font-size:1.25rem}.arena-problem{border-radius:var(--radius-lg);background:var(--section-light);border:1px dashed var(--border);text-align:center;font-size:1.5rem;font-weight:var(--fw-bold);color:var(--text-primary);margin-bottom:1rem;padding:1.25rem}.arena-method{border-radius:var(--radius-pill);color:#2563eb;font-size:.85rem;font-weight:var(--fw-semibold);background:#3b82f61a;justify-content:center;align-items:center;margin-bottom:1rem;padding:.5rem .9rem;display:inline-flex}.arena-answer{margin-top:1rem}.arena-answer summary{cursor:pointer;border-radius:var(--radius-lg);text-align:center;color:#e3f69e;font-weight:var(--fw-semibold);background:#22c55e1a;border:1px solid #22c55e33;padding:.9rem 1rem;list-style:none}.arena-answer summary::-webkit-details-marker{display:none}.arena-answer strong{border-radius:var(--radius-lg);color:#fff;font-size:1.2rem;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);justify-content:center;align-items:center;margin-top:.75rem;padding:1rem;display:flex;box-shadow:0 10px 25px #22c55e2e}.arena-footer{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:3rem}.arena-footer h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.5rem,3vw,2rem)}.arena-footer p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=992px){.arena-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.arena-grid{grid-template-columns:1fr}.arena-card{padding:1.5rem}.arena-footer{padding:2rem 1.5rem}.arena-problem{font-size:1.25rem}}.mental-subtraction-faq{background:linear-gradient(180deg, transparent, var(--section-light));position:relative}.faq-item{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s;overflow:hidden}.faq-item:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}.faq-item summary{cursor:pointer;font-size:clamp(1rem,2vw,1.15rem);font-weight:var(--fw-semibold);color:var(--text-primary);padding:1.5rem 4rem 1.5rem 1.5rem;list-style:none;transition:background .3s;position:relative}.faq-item summary:hover{background:var(--section-light)}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";width:2rem;height:2rem;color:var(--subtraction-middle);font-size:1.25rem;font-weight:var(--fw-bold);background:#ef444414;border-radius:50%;justify-content:center;align-items:center;transition:all .3s;display:flex;position:absolute;top:50%;right:1.5rem;transform:translateY(-50%)}.faq-item[open] summary{background:#ef44440d}.faq-item[open] summary:after{content:"−";background:var(--subtraction-middle);color:#fff;transform:translateY(-50%)rotate(180deg)}.faq-item p{color:var(--text-secondary);border-top:1px solid var(--border);padding:0 1.5rem 1.5rem;line-height:1.8}.faq-item:before{content:"";background:linear-gradient(90deg, var(--subtraction-start), var(--subtraction-middle), var(--subtraction-end));width:100%;height:4px;display:block}@media (width<=768px){.faq-item summary{padding:1.25rem 3.5rem 1.25rem 1rem;font-size:1rem}.faq-item p{padding:0 1rem 1.25rem}.faq-item summary:after{right:1rem}}.related-topics{background:linear-gradient(180deg, transparent, var(--section-medium));position:relative}.topic-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);text-align:center;box-shadow:var(--shadow-sm);padding:2rem;transition:transform .35s,box-shadow .35s;position:relative;overflow:hidden}.topic-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.topic-card:before{content:"";background:linear-gradient(90deg, var(--subtraction-start), var(--subtraction-middle), var(--subtraction-end));width:100%;height:4px;position:absolute;top:0;left:0}.topic-icon{background:#ef444414;border:1px solid #ef444426;border-radius:50%;justify-content:center;align-items:center;width:5rem;height:5rem;margin:0 auto 1.25rem;font-size:2rem;transition:transform .3s;display:flex}.topic-card:hover .topic-icon{transform:scale(1.1)}.topic-card h3{margin-bottom:.75rem;font-size:1.3rem}.topic-card p{color:var(--text-secondary);min-height:80px;margin-bottom:1.5rem}.topic-card span{color:var(--subtraction-middle);font-weight:var(--fw-semibold);justify-content:center;align-items:center;gap:.5rem;transition:gap .3s;display:inline-flex}.topic-card:hover span{gap:.8rem}.topic-card:first-child .topic-icon{background:#3b82f61a;border-color:#3b82f633}.topic-card:nth-child(2) .topic-icon{background:#22c55e1a;border-color:#22c55e33}.topic-card:nth-child(3) .topic-icon{background:#f973161a;border-color:#f9731633}.topic-card:nth-child(4) .topic-icon{background:#a855f71a;border-color:#a855f733}.related-topics:after{content:"";background:radial-gradient(circle, var(--subtraction-glow), transparent 70%);pointer-events:none;opacity:.4;width:400px;height:400px;position:absolute;top:0;left:50%;transform:translate(-50%)}@media (width<=992px){.topics-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.topics-grid{grid-template-columns:1fr}.topic-card{padding:1.5rem}.topic-card p{min-height:auto}.topic-icon{width:4rem;height:4rem;font-size:1.6rem}}.mental-subtraction-cta{position:relative;overflow:hidden}.cta-wrapper{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle), var(--subtraction-end));box-shadow:var(--shadow-lg);padding:4rem 2rem;position:relative;overflow:hidden}.cta-wrapper:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#ffffff26,#0000 40%);position:absolute;inset:0}.cta-badge{border-radius:var(--radius-pill);color:#fff;font-weight:var(--fw-semibold);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff26;justify-content:center;align-items:center;margin-bottom:1.5rem;padding:.75rem 1.25rem;display:inline-flex}.cta-wrapper h2{color:#fff;margin-bottom:1rem;max-width:900px;margin-inline:auto;font-size:clamp(2rem,5vw,4rem)}.cta-wrapper h2 span{color:#ffffffe6;margin-top:.5rem;display:block}.cta-wrapper p{color:#ffffffeb;max-width:750px;margin:0 auto 2rem}.cta-achievements{grid-template-columns:repeat(3,1fr);gap:1rem;max-width:900px;margin:0 auto 2.5rem;display:grid}.achievement{border-radius:var(--radius-lg);color:#fff;font-weight:var(--fw-medium);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1f;padding:1rem}.cta-actions{flex-wrap:wrap;justify-content:center;gap:1rem;margin-bottom:2rem;display:flex}.cta-primary-btn{border-radius:var(--radius-pill);color:var(--subtraction-start);font-weight:var(--fw-bold);background:#fff;padding:1rem 2rem;transition:transform .3s}.cta-primary-btn:hover{transform:translateY(-4px)}.cta-secondary-btn{border-radius:var(--radius-pill);color:#fff;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid #ffffff40;padding:1rem 2rem}.cta-secondary-btn:hover{background:#ffffff1a}.cta-quote{color:#fffffff2;max-width:700px;margin:0 auto;font-size:1.1rem}@media (width<=768px){.cta-wrapper{padding:3rem 1.25rem}.cta-achievements{grid-template-columns:1fr}.cta-actions{flex-direction:column}.cta-primary-btn,.cta-secondary-btn{width:100%}}.subtraction-mistakes{background:linear-gradient(180deg, transparent, var(--section-light));position:relative}.mistakes-grid{grid-template-columns:repeat(2,1fr);gap:1.5rem;margin-bottom:4rem;display:grid}.mistake-card{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:2rem;transition:transform .35s,box-shadow .35s}.mistake-card h3{text-align:center;margin-bottom:1.5rem;font-size:1.3rem}.wrong-box{border-radius:var(--radius-lg);background:#ef444414;border:1px solid #ef444433;margin-bottom:1rem;padding:1rem}.wrong-box span{font-weight:var(--fw-bold);color:#dc2626;margin-bottom:.75rem;display:inline-block}.wrong-box p{color:var(--text-primary);font-weight:var(--fw-medium)}.correct-box{border-radius:var(--radius-lg);background:#22c55e14;border:1px solid #22c55e33;margin-bottom:1rem;padding:1rem}.correct-box span{font-weight:var(--fw-bold);color:#16a34a;margin-bottom:.75rem;display:inline-block}.correct-box p{color:var(--text-primary);font-weight:var(--fw-medium)}.mistake-lesson{border-radius:var(--radius-lg);color:var(--text-primary);font-weight:var(--fw-medium);background:#3b82f614;border:1px solid #3b82f626;padding:1rem}.mistakes-footer{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--subtraction-start), var(--subtraction-middle));max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:3rem}.mistakes-footer h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.5rem,3vw,2rem)}.mistakes-footer p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=900px){.mistakes-grid{grid-template-columns:1fr}.mistake-card{padding:1.5rem}.mistakes-footer{padding:2rem 1.5rem}}.mental-multiplication-hero{background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle), var(--multiplication-end));padding-top:8rem;position:relative;overflow:hidden}.mental-multiplication-hero:before{content:"";background:var(--multiplication-glow);filter:blur(100px);pointer-events:none;border-radius:50%;width:500px;height:500px;position:absolute;top:-200px;right:-200px}.mental-multiplication-hero:after{content:"";filter:blur(100px);pointer-events:none;background:#ffffff14;border-radius:50%;width:450px;height:450px;position:absolute;bottom:-200px;left:-200px}.mental-multiplication-grid{z-index:2;grid-template-columns:1.1fr .9fr;align-items:center;gap:4rem;display:grid;position:relative}.mental-multiplication-content{color:#fff}.mental-multiplication-badge{border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;font-weight:var(--fw-semibold);background:#ffffff26;align-items:center;margin-bottom:1.5rem;padding:.75rem 1.25rem;display:inline-flex}.mental-multiplication-content h1{color:#fff;margin-bottom:1.5rem;font-size:clamp(2.5rem,6vw,5rem);line-height:1.05}.mental-multiplication-content h1 span{color:#ffffffeb;margin-top:.5rem;display:block}.mental-multiplication-content p{color:#ffffffe0;max-width:650px;margin-bottom:2rem;font-size:clamp(1rem,2vw,1.15rem)}.mental-multiplication-highlights{flex-wrap:wrap;gap:1rem;margin-bottom:2rem;display:flex}.mental-multiplication-highlights div{border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;font-weight:var(--fw-medium);background:#ffffff1f;padding:.8rem 1rem}.mental-multiplication-actions{flex-wrap:wrap;gap:1rem;display:flex}.multiplication-primary-btn{border-radius:var(--radius-pill);color:var(--multiplication-start);font-weight:var(--fw-bold);background:#fff;padding:1rem 2rem;transition:transform .3s}.multiplication-primary-btn:hover{transform:translateY(-4px)}.multiplication-secondary-btn{border-radius:var(--radius-pill);color:#fff;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid #ffffff40;padding:1rem 2rem}.multiplication-secondary-btn:hover{background:#ffffff14}.mental-multiplication-showcase{justify-content:center;display:flex}.multiplication-showcase-card{border-radius:var(--radius-xl);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffff1f;border:1px solid #ffffff26;width:100%;max-width:500px;padding:2rem;box-shadow:0 20px 40px #00000026}.showcase-header{text-align:center;color:#fff;font-weight:var(--fw-semibold);margin-bottom:1.5rem}.showcase-question{text-align:center;font-size:clamp(2rem,5vw,3rem);font-weight:var(--fw-extrabold);color:#fff;margin-bottom:2rem}.showcase-comparison{grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:2rem;display:grid}.showcase-side{border-radius:var(--radius-lg);text-align:center;background:#ffffff14;padding:1.5rem}.showcase-side span{color:#fff;font-weight:var(--fw-semibold);margin-bottom:.75rem;display:block}.showcase-side p{color:#ffffffe0}.showcase-side.smart{border:1px solid #ffffff26}.showcase-answer{text-align:center;border-radius:var(--radius-lg);color:#fff;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);padding:1rem;box-shadow:0 10px 25px #22c55e40}@media (width<=992px){.mental-multiplication-grid{grid-template-columns:1fr;gap:3rem}.mental-multiplication-content{text-align:center}.mental-multiplication-highlights,.mental-multiplication-actions{justify-content:center}}@media (width<=768px){.mental-multiplication-hero{padding-top:7rem}.showcase-comparison{grid-template-columns:1fr}.mental-multiplication-actions{flex-direction:column}.multiplication-primary-btn,.multiplication-secondary-btn{text-align:center;width:100%}.multiplication-showcase-card{padding:1.5rem}}.multiplication-mindset-shift{background:linear-gradient(180deg, transparent, var(--section-light));position:relative}.mindset-comparison{grid-template-columns:1fr auto 1fr;align-items:center;gap:2rem;margin-bottom:4rem;display:grid}.mindset-side{border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:2rem;transition:transform .3s,box-shadow .3s}.mindset-side:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.mindset-label{border-radius:var(--radius-pill);font-size:.9rem;font-weight:var(--fw-semibold);justify-content:center;align-items:center;margin-bottom:1rem;padding:.5rem 1rem;display:inline-flex}.mindset-side.old .mindset-label{color:#dc2626;background:#ef44441a}.mindset-side.new .mindset-label{color:#16a34a;background:#22c55e1a}.mindset-side h3{margin-bottom:1.5rem;font-size:clamp(1.4rem,2vw,1.8rem)}.mindset-side ul{flex-direction:column;gap:1rem;display:flex}.mindset-side li{border-radius:var(--radius-lg);background:var(--section-light);color:var(--text-secondary);padding:.9rem 1rem}.mindset-vs{background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));color:#fff;width:80px;height:80px;font-size:1.5rem;font-weight:var(--fw-extrabold);border-radius:50%;justify-content:center;align-items:center;display:flex;box-shadow:0 10px 30px #8b5cf640}.mindset-example{text-align:center;border-radius:var(--radius-xl);background:var(--card-bg);border:1px solid var(--border);max-width:850px;box-shadow:var(--shadow-sm);margin:0 auto 3rem;padding:3rem}.example-problem{font-size:clamp(2rem,5vw,3rem);font-weight:var(--fw-extrabold);margin-bottom:1rem}.example-arrow{color:var(--multiplication-middle);margin-bottom:1rem;font-size:2rem}.example-thinking{border-radius:var(--radius-lg);font-size:1.2rem;font-weight:var(--fw-semibold);background:#8b5cf614;border:1px dashed #8b5cf633;margin-bottom:1rem;padding:1.5rem}.example-answer{border-radius:var(--radius-pill);color:#fff;font-weight:var(--fw-bold);background:linear-gradient(135deg,#22c55e,#4ade80);justify-content:center;align-items:center;padding:1rem 1.5rem;display:inline-flex;box-shadow:0 10px 25px #22c55e33}.mindset-conclusion{text-align:center;border-radius:var(--radius-xl);background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));max-width:900px;box-shadow:var(--shadow-md);margin:0 auto;padding:3rem}.mindset-conclusion h3{color:#fff;margin-bottom:1rem;font-size:clamp(1.5rem,3vw,2rem)}.mindset-conclusion p{color:#ffffffeb;max-width:650px;margin:0 auto}@media (width<=992px){.mindset-comparison{grid-template-columns:1fr;gap:1.5rem}.mindset-vs{margin:0 auto}}@media (width<=768px){.mindset-side,.mindset-example{padding:1.5rem}.mindset-conclusion{padding:2rem 1.5rem}}.multiplication-vision-lab{position:relative}.mvl-timeline{flex-direction:column;gap:3rem;margin-top:3rem;display:flex}.mvl-card{position:relative}.mvl-step{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:2rem;padding:2rem}.mvl-step-header{align-items:center;gap:1rem;margin-bottom:2rem;display:flex}.mvl-icon{background:linear-gradient(135deg, var(--multiplication-start), 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#3b82f61f;border-radius:1rem;margin-top:1rem;padding:.9rem;font-size:.9rem}.mst-use span{color:var(--multiplication-middle);margin-bottom:.4rem;font-weight:700;display:block}.mst-category{color:var(--multiplication-middle);background:#8b5cf61a;border-radius:999px;margin-top:.75rem;padding:.45rem .9rem;font-size:.8rem;font-weight:700;display:inline-flex}.multiplication-mistakes{position:relative;overflow:hidden}.mm-danger-grid{grid-template-columns:repeat(2,1fr);gap:2rem;margin-top:3rem;display:grid}.mm-danger-card{background:linear-gradient(135deg, var(--card-bg), #ffffff05);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:2rem;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.mm-danger-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.mm-danger-card:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#ef44441f,#0000 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strong{color:#2563eb;margin-bottom:.75rem;font-size:.95rem;display:block}.mm-lesson p{margin:0}.mm-final-warning{text-align:center;background:linear-gradient(135deg,#dc2626,#ef4444);border-radius:2rem;margin-top:4rem;padding:3rem;box-shadow:0 20px 50px #ef444433}.mm-final-warning h3{color:#fff;margin-bottom:1rem}.mm-final-warning p{color:#fffffff2;max-width:750px;margin:0 auto}@media (width<=900px){.mm-danger-grid{grid-template-columns:1fr}}@media (width<=768px){.mm-danger-card{padding:1.5rem}.mm-danger-header{text-align:center;flex-direction:column}.mm-danger-icon{width:3.5rem;height:3.5rem}.mm-danger-header h3{font-size:1.2rem}.mm-final-warning{padding:2rem 1.5rem}}.multiplication-real-life{position:relative;overflow:hidden}.mrl-grid{grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:3rem;display:grid}.mrl-card{background:linear-gradient(135deg, var(--card-bg), #ffffff05);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:2rem;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.mrl-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.mrl-card:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#22c55e1f,#0000 60%);position:absolute;inset:0}.mrl-icon{background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));color:#fff;border-radius:1.25rem;justify-content:center;align-items:center;width:4.5rem;height:4.5rem;margin-bottom:1.25rem;font-size:2rem;display:flex;box-shadow:0 15px 35px #8b5cf633}.mrl-card h3{margin-bottom:1rem;font-size:1.4rem}.mrl-challenge{background:#ef444414;border:1px solid #ef444426;border-radius:1rem;margin-bottom:1rem;padding:1rem;font-weight:600}.mrl-thinking{color:#2563eb;background:#3b82f614;border:1px solid #3b82f626;border-radius:1rem;margin-bottom:1rem;padding:1rem;font-weight:700;position:relative}.mrl-thinking:before{content:"🧠 Mental Path";letter-spacing:.05em;color:var(--text-muted);margin-bottom:.75rem;font-size:.8rem;font-weight:700;display:block}.mrl-answer{color:#fff;background:linear-gradient(135deg,#22c55e,#4ade80);border-radius:1rem;justify-content:center;align-items:center;min-height:4rem;font-size:1.2rem;font-weight:800;display:flex;box-shadow:0 10px 25px #22c55e33}.mrl-conclusion{text-align:center;background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.mrl-conclusion h3{color:#fff;margin-bottom:1rem}.mrl-conclusion p{color:#ffffffeb;max-width:800px;margin:0 auto}@media (width<=1024px){.mrl-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.mrl-grid{grid-template-columns:1fr}.mrl-card{padding:1.5rem}.mrl-icon{width:4rem;height:4rem;font-size:1.75rem}.mrl-card h3{font-size:1.25rem}.mrl-conclusion{padding:2rem 1.5rem}}.multiplication-battle-arena{position:relative;overflow:hidden}.mba-grid{grid-template-columns:repeat(5,1fr);gap:1.5rem;margin-top:3rem;display:grid}.mba-card{background:linear-gradient(180deg, var(--card-bg), #ffffff05);border:1px solid var(--border);text-align:center;box-shadow:var(--shadow-sm);border-radius:2rem;padding:2rem 1.25rem;transition:all .35s;position:relative;overflow:hidden}.mba-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.mba-card:before{content:"";pointer-events:none;background:radial-gradient(circle at top,#8b5cf61f,#0000 60%);position:absolute;inset:0}.mba-rank{color:var(--multiplication-middle);background:#8b5cf614;border-radius:999px;justify-content:center;align-items:center;margin-bottom:1.5rem;padding:.5rem 1rem;font-size:.9rem;font-weight:700;display:inline-flex}.mba-problem{min-height:7rem;color:var(--text-primary);justify-content:center;align-items:center;margin-bottom:1rem;font-size:clamp(1.5rem,2vw,2rem);font-weight:800;display:flex}.mba-hint{color:#2563eb;background:#3b82f614;border:1px solid #3b82f61f;border-radius:1rem;margin-bottom:1.25rem;padding:.85rem;font-size:.85rem;font-weight:600}.mba-btn{background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));color:#fff;border-radius:1rem;width:100%;padding:.9rem 1rem;font-weight:700;transition:all .3s}.mba-btn:hover{transform:translateY(-2px)}.mba-card:first-child .mba-rank{color:#d97706;background:#f59e0b1a}.mba-card:nth-child(2) .mba-rank{color:#6b7280;background:#6b72801a}.mba-card:nth-child(3) .mba-rank{color:#ca8a04;background:#eab3081a}.mba-card:nth-child(4) .mba-rank{color:#9333ea;background:#a855f71a}.mba-card:nth-child(5) .mba-rank{color:#dc2626;background:#ef44441a}.mba-final{text-align:center;background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.mba-final h3{color:#fff;margin-bottom:1rem}.mba-final p{color:#ffffffeb;max-width:700px;margin:0 auto}@media (width<=1200px){.mba-grid{grid-template-columns:repeat(3,1fr)}}@media (width<=900px){.mba-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.mba-grid{grid-template-columns:1fr}.mba-card{padding:1.5rem}.mba-problem{min-height:auto;font-size:1.5rem}.mba-final{padding:2rem 1.5rem}}.mba-status{color:#16a34a;background:#22c55e1a;border:1px solid #22c55e26;border-radius:1rem;padding:.9rem;font-weight:700}.mental-multiplication-faq{position:relative;overflow:hidden}.mmf-grid{grid-template-columns:repeat(2,1fr);gap:2rem;margin-top:3rem;display:grid}.mmf-card{background:linear-gradient(135deg, var(--card-bg), #ffffff05);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:2rem;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.mmf-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.mmf-card:before{content:"❓";opacity:.12;font-size:2rem;position:absolute;top:1rem;right:1rem}.mmf-card h3{margin-bottom:1.25rem;padding-left:2.5rem;font-size:clamp(1.1rem,1.5vw,1.4rem);line-height:1.4;position:relative}.mmf-card h3:before{content:"Q";background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));color:#fff;border-radius:50%;justify-content:center;align-items:center;width:1.8rem;height:1.8rem;font-size:.85rem;font-weight:800;display:flex;position:absolute;top:0;left:0}.mmf-card p{color:var(--text-secondary);background:#3b82f60f;border:1px solid #3b82f61a;border-radius:1rem;padding:1.25rem;line-height:1.8;position:relative}.mmf-card p:before{content:"💡 Expert Answer";color:var(--multiplication-middle);letter-spacing:.05em;text-transform:uppercase;margin-bottom:.75rem;font-size:.8rem;font-weight:700;display:block}.mmf-card:hover h3:before{transform:scale(1.08)}.mmf-summary{text-align:center;background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.mmf-summary h3{color:#fff;margin-bottom:1rem}.mmf-summary p{color:#ffffffeb;max-width:800px;margin:0 auto}@media (width<=900px){.mmf-grid{grid-template-columns:1fr}}@media (width<=768px){.mmf-card{padding:1.5rem}.mmf-card h3{padding-left:2.2rem;font-size:1.1rem}.mmf-card p{padding:1rem}.mmf-summary{padding:2rem 1.5rem}}.related-topics{position:relative;overflow:hidden}.rt-grid{grid-template-columns:repeat(4,1fr);gap:1.75rem;margin-top:3rem;display:grid}.rt-card{background:linear-gradient(135deg, var(--card-bg), #ffffff05);border:1px solid var(--border);min-height:22rem;box-shadow:var(--shadow-sm);border-radius:2rem;flex-direction:column;padding:2rem;transition:all .35s;display:flex;position:relative;overflow:hidden}.rt-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-10px)}.rt-card:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#8b5cf61f,#0000 60%);position:absolute;inset:0}.rt-icon{background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));color:#fff;border-radius:1.5rem;justify-content:center;align-items:center;width:5rem;height:5rem;margin-bottom:1.5rem;font-size:2rem;display:flex;box-shadow:0 15px 35px #8b5cf633}.rt-card h3{color:var(--text-primary);margin-bottom:1rem;font-size:clamp(1.25rem,2vw,1.6rem)}.rt-card p{color:var(--text-secondary);flex:1;line-height:1.8}.rt-card span{color:var(--multiplication-middle);background:#8b5cf61a;border-radius:999px;justify-content:center;align-items:center;margin-top:1.5rem;padding:.85rem 1.25rem;font-weight:700;transition:all .3s;display:inline-flex}.rt-card:hover span{background:#8b5cf626;transform:translate(5px)}.rt-card:first-child .rt-icon{background:linear-gradient(135deg,#22c55e,#4ade80)}.rt-card:nth-child(2) .rt-icon{background:linear-gradient(135deg,#ef4444,#f87171)}.rt-card:nth-child(3) .rt-icon{background:linear-gradient(135deg,#3b82f6,#60a5fa)}.rt-card:nth-child(4) .rt-icon{background:linear-gradient(135deg,#8b5cf6,#a78bfa)}.rt-card:after{content:"↗";color:var(--text-muted);opacity:.3;font-size:1.25rem;position:absolute;top:1rem;right:1rem}@media (width<=1100px){.rt-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.rt-grid{grid-template-columns:1fr}.rt-card{min-height:auto;padding:1.5rem}.rt-icon{width:4rem;height:4rem;font-size:1.75rem}.rt-card h3{font-size:1.25rem}}.mental-multiplication-cta{position:relative;overflow:hidden}.mmcta-card{text-align:center;background:linear-gradient(135deg, var(--multiplication-start), var(--multiplication-middle));box-shadow:var(--shadow-lg);border-radius:2rem;padding:clamp(2rem,4vw,4rem);position:relative;overflow:hidden}.mmcta-card:before{content:"";filter:blur(40px);background:#ffffff14;border-radius:50%;width:25rem;height:25rem;position:absolute;top:-10rem;right:-10rem}.mmcta-badge{color:#fff;background:#ffffff26;border-radius:999px;margin-bottom:1.5rem;padding:.6rem 1.2rem;font-weight:700;display:inline-flex}.mmcta-card h2{color:#fff;max-width:900px;margin:0 auto 1.5rem;font-size:clamp(2rem,4vw,4rem)}.mmcta-card h2 span{color:#ffffffe6;margin-top:.5rem;display:block}.mmcta-card>p{color:#ffffffeb;max-width:700px;margin:0 auto 2rem}.mmcta-stats{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin:3rem 0;display:grid}.mmcta-stats div{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1f;border-radius:1.25rem;padding:1.5rem}.mmcta-stats strong{color:#fff;margin-bottom:.5rem;display:block}.mmcta-stats span{color:#ffffffd9}.mmcta-actions{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.mmcta-primary,.mmcta-secondary{border-radius:999px;padding:1rem 1.75rem;font-weight:700}.mmcta-primary{color:var(--multiplication-middle);background:#fff}.mmcta-secondary{color:#fff;background:#ffffff1f;border:1px solid #fff3}.mmcta-quote{border-top:1px solid #ffffff26;margin-top:3rem;padding-top:2rem}.mmcta-quote h3{color:#fff;margin-bottom:.75rem}.mmcta-quote p{color:#ffffffe6}@media (width<=768px){.mmcta-stats{grid-template-columns:1fr}.mmcta-actions{flex-direction:column}}.mental-division-hero{background:linear-gradient(180deg, transparent, var(--division-card));position:relative;overflow:hidden}.mental-division-hero-grid{grid-template-columns:1.1fr .9fr;align-items:center;gap:4rem;display:grid}.mental-division-content{flex-direction:column;display:flex}.mental-division-badge{width:fit-content;color:var(--division-middle);background:#14b8a61a;border:1px solid #14b8a626;border-radius:999px;margin-bottom:1.5rem;padding:.75rem 1.25rem;font-weight:700;display:inline-flex}.mental-division-content h1{margin-bottom:1.5rem;font-size:clamp(2.5rem,6vw,5rem);line-height:1.05}.mental-division-content h1 span{background:linear-gradient(135deg, var(--division-start), var(--division-middle));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-top:.75rem;display:block}.mental-division-content p{max-width:650px;margin-bottom:2rem;font-size:clamp(1rem,1.5vw,1.15rem)}.mental-division-highlights{flex-wrap:wrap;gap:1rem;margin-bottom:2rem;display:flex}.mental-division-highlights div{background:var(--card-bg);border:1px solid var(--border);border-radius:999px;padding:.85rem 1.25rem;font-weight:600}.mental-division-actions{flex-wrap:wrap;gap:1rem;display:flex}.division-primary-btn,.division-secondary-btn{border-radius:999px;padding:1rem 1.5rem;font-weight:700}.division-primary-btn{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;box-shadow:0 15px 35px var(--division-glow)}.division-secondary-btn{background:var(--card-bg);border:1px solid var(--border)}.mental-division-showcase{position:relative}.division-showcase-card{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-lg);border-radius:2rem;padding:2rem;position:relative;overflow:hidden}.division-showcase-card:before{content:"";background:var(--division-glow);filter:blur(40px);border-radius:50%;width:15rem;height:15rem;position:absolute;top:-6rem;right:-6rem}.division-showcase-header{color:var(--division-middle);background:#14b8a614;border-radius:999px;margin-bottom:1.5rem;padding:.5rem 1rem;font-weight:700;display:inline-flex}.division-question{text-align:center;margin-bottom:2rem;font-size:clamp(2rem,4vw,3rem);font-weight:800}.division-comparison{grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:1.5rem;display:grid}.division-method{text-align:center;background:#ef44440f;border:1px solid #ef44441f;border-radius:1rem;padding:1.25rem}.division-method.smart{background:#14b8a614;border:1px solid #14b8a626}.method-badge{margin-bottom:.75rem;font-size:.85rem;font-weight:700}.method-flow{font-size:1.15rem;font-weight:700}.division-breakdown{flex-direction:column;gap:.75rem;margin-bottom:1.5rem;display:flex}.division-breakdown div{text-align:center;background:#14b8a60f;border:1px solid #14b8a61a;border-radius:1rem;padding:1rem;font-weight:700}.division-answer{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;border-radius:1rem;justify-content:space-between;align-items:center;padding:1.25rem;display:flex}.division-answer strong{font-size:2rem;font-weight:800}@media (width<=992px){.mental-division-hero-grid{grid-template-columns:1fr;gap:3rem}}@media (width<=768px){.division-comparison{grid-template-columns:1fr}.division-answer{text-align:center;flex-direction:column;gap:.75rem}.division-showcase-card{padding:1.5rem}.mental-division-highlights{flex-direction:column}.mental-division-highlights div{text-align:center}}.division-mindset-shift{position:relative;overflow:hidden}.dms-battle{grid-template-columns:1fr auto 1fr;align-items:center;gap:2rem;margin-top:3rem;display:grid}.dms-side{background:var(--card-bg);border:1px solid var(--border);min-height:28rem;box-shadow:var(--shadow-sm);border-radius:2rem;padding:2rem;position:relative;overflow:hidden}.dms-side.student{background:linear-gradient(135deg, #ef44440d, var(--card-bg));border-color:#ef444426}.dms-side.student:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#ef44441f,#0000 60%);position:absolute;inset:0}.dms-side.thinker{background:linear-gradient(135deg, #14b8a60f, var(--card-bg));border-color:#14b8a626}.dms-side.thinker:before{content:"";pointer-events:none;background:radial-gradient(circle at 100% 0,#14b8a61f,#0000 60%);position:absolute;inset:0}.dms-label{border-radius:999px;margin-bottom:1.5rem;padding:.6rem 1rem;font-size:.85rem;font-weight:700;display:inline-flex}.student .dms-label{color:#dc2626;background:#ef44441a}.thinker .dms-label{color:var(--division-middle);background:#14b8a61a}.dms-problem{text-align:center;margin-bottom:2rem;font-size:clamp(2rem,4vw,3rem);font-weight:800}.student ul{flex-direction:column;gap:1rem;margin:0;padding:0;list-style:none;display:flex}.student li{background:#ef44440f;border:1px solid #ef44441a;border-radius:1rem;padding:1rem 1.25rem;font-weight:600}.dms-vs{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;width:5rem;height:5rem;box-shadow:0 15px 40px var(--division-glow);border-radius:50%;justify-content:center;align-items:center;font-size:1.25rem;font-weight:800;display:flex}.dms-path{text-align:center;background:#14b8a614;border:1px solid #14b8a61f;border-radius:1rem;padding:1rem;font-size:1.2rem;font-weight:700}.dms-arrow{text-align:center;color:var(--division-middle);margin:.75rem 0;font-size:2rem}.dms-answer{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;box-shadow:0 15px 35px var(--division-glow);border-radius:1rem;margin-top:1rem;padding:1.25rem;font-size:2rem;font-weight:800}.dms-rules{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:4rem;display:grid}.dms-rule{background:var(--card-bg);border:1px solid var(--border);text-align:center;border-radius:1.5rem;padding:2rem}.dms-rule span{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;border-radius:50%;justify-content:center;align-items:center;width:3rem;height:3rem;margin-bottom:1rem;font-weight:800;display:inline-flex}.dms-rule h3{margin-bottom:.75rem}.dms-secret{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.dms-secret h3{color:#fff;margin-bottom:1rem}.dms-secret p{color:#ffffffeb;max-width:700px;margin:0 auto}@media (width<=992px){.dms-battle{grid-template-columns:1fr;gap:1.5rem}.dms-vs{margin:0 auto}.dms-rules{grid-template-columns:1fr}}@media (width<=768px){.dms-side{min-height:auto;padding:1.5rem}.dms-problem{font-size:2rem}.dms-secret{padding:2rem 1.5rem}}.think-in-groups{position:relative;overflow:hidden}.tig-showcase{text-align:center;background:linear-gradient(135deg,#14b8a614,#14b8a608);border:1px solid #14b8a61f;border-radius:2rem;margin-top:3rem;padding:2.5rem}.tig-problem{color:var(--division-middle);margin-bottom:2rem;font-size:clamp(2rem,4vw,3.5rem);font-weight:800}.tig-groups{grid-template-columns:repeat(4,1fr);gap:1.5rem;margin-bottom:2rem;display:grid}.tig-group{background:var(--card-bg);border:1px solid var(--border);border-radius:1.25rem;grid-template-columns:repeat(3,1fr);gap:.75rem;padding:1rem;display:grid}.tig-group span{background:linear-gradient(135deg, var(--division-start), var(--division-middle));border-radius:50%;width:1rem;height:1rem;margin:auto;box-shadow:0 4px 10px #14b8a640}.tig-answer{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;box-shadow:0 15px 35px var(--division-glow);border-radius:999px;justify-content:center;align-items:center;padding:1rem 2rem;font-size:1.1rem;font-weight:800;display:inline-flex}.tig-card{background:var(--card-bg);border:1px solid var(--border);border-radius:1.5rem;justify-content:space-between;align-items:center;gap:2rem;margin-top:2rem;padding:2rem;transition:all .3s;display:flex}.tig-card:hover{box-shadow:var(--shadow-md);transform:translateY(-5px)}.tig-card-left h3{margin-bottom:.75rem;font-size:1.4rem}.tig-card-left p{margin:0}.tig-card-right{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;min-width:5rem;height:5rem;box-shadow:0 15px 35px var(--division-glow);border-radius:50%;justify-content:center;align-items:center;font-size:2rem;font-weight:800;display:flex}.tig-mindshift{text-align:center;background:linear-gradient(135deg,#14b8a614,#14b8a608);border:1px solid #14b8a61f;border-radius:2rem;margin-top:4rem;padding:3rem}.tig-mindshift h3{color:var(--division-middle);margin-bottom:1.5rem}.tig-mindshift p{margin-bottom:1rem;font-size:1.15rem}.tig-real-life{background:var(--card-bg);border:1px solid var(--border);border-radius:2rem;margin-top:3rem;padding:3rem}.tig-real-life h3{margin-bottom:1.5rem}.tig-mission{background:#14b8a614;border:1px solid #14b8a61f;border-radius:1.25rem;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.5rem;padding:1.5rem;display:flex}.tig-mission div{color:var(--division-middle);font-size:1.5rem;font-weight:800}@media (width<=992px){.tig-groups{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.tig-showcase{padding:1.5rem}.tig-groups{grid-template-columns:1fr}.tig-card{text-align:center;flex-direction:column}.tig-card-right{width:4.5rem;height:4.5rem;font-size:1.6rem}.tig-mission{text-align:center;flex-direction:column}.tig-mindshift,.tig-real-life{padding:2rem 1.5rem}}.friendly-division-method{position:relative;overflow:hidden}.fdl-lab{background:linear-gradient(135deg,#14b8a614,#14b8a608);border:1px solid 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var(--division-middle));color:#fff;border-radius:1.5rem;margin-top:2rem;padding:2rem}.fdl-adjustment-title{margin-bottom:1rem;font-size:1.2rem;font-weight:800}.fdl-adjustment-flow{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffff1f;border-radius:1rem;margin-bottom:.75rem;padding:.85rem 1rem}.fdl-final{text-align:center;background:#ffffff2e;border-radius:1rem;margin-top:1rem;padding:1rem;font-size:1.5rem;font-weight:900}.fdl-examples{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:3rem;display:grid}.fdl-card{background:var(--card-bg);border:1px solid var(--border);border-radius:1.5rem;padding:2rem;transition:all .3s}.fdl-card:hover{box-shadow:var(--shadow-md);transform:translateY(-6px)}.fdl-card-problem{text-align:center;color:var(--division-middle);margin-bottom:1rem;font-size:1.5rem;font-weight:800}.fdl-card-flow{text-align:center;background:#14b8a60f;border:1px solid #14b8a614;border-radius:1rem;margin-bottom:.75rem;padding:.85rem}.fdl-card strong{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;border-radius:1rem;margin-top:1rem;padding:1rem;font-size:1.4rem;display:block}.fdl-rule{text-align:center;background:linear-gradient(135deg,#14b8a614,#14b8a608);border:1px solid #14b8a61f;border-radius:2rem;margin-top:4rem;padding:3rem}.fdl-rule h3{color:var(--division-middle);margin-bottom:1rem}.fdl-rule p{max-width:750px;margin:0 auto}@media (width<=992px){.fdl-transform{grid-template-columns:1fr}.fdl-arrow{margin:.5rem auto;transform:rotate(90deg)}.fdl-examples{grid-template-columns:1fr}}@media (width<=768px){.fdl-lab{padding:1.5rem}.fdl-step{padding:1.25rem}.fdl-adjustment{padding:1.5rem}.fdl-rule{padding:2rem 1.5rem}}.factor-splitting-method{position:relative;overflow:hidden}.fsm-machine{background:linear-gradient(135deg,#14b8a614,#14b8a608);border:1px solid #14b8a61f;border-radius:2rem;margin-top:3rem;padding:2.5rem}.fsm-problem{text-align:center;color:var(--division-middle);margin-bottom:2.5rem;font-size:clamp(2.25rem,5vw,4rem);font-weight:900}.fsm-track{grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;align-items:center;gap:1rem;display:grid}.fsm-stage{background:var(--card-bg);border:1px solid var(--border);text-align:center;border-radius:1.5rem;padding:1.5rem;transition:all .3s;position:relative}.fsm-stage:hover{box-shadow:var(--shadow-md);transform:translateY(-5px)}.fsm-stage span{color:var(--division-middle);background:#14b8a61a;border-radius:999px;margin-bottom:1rem;padding:.4rem .85rem;font-size:.8rem;font-weight:700;display:inline-flex}.fsm-stage strong{font-size:1.35rem;font-weight:800;display:block}.fsm-arrow{color:var(--division-middle);font-size:2rem;font-weight:900}.fsm-library{grid-template-columns:repeat(4,1fr);gap:1.5rem;margin-top:3rem;display:grid}.fsm-factor-card{background:var(--card-bg);border:1px solid 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var(--division-middle));color:#fff;text-align:center;border-radius:1rem;margin-top:1rem;padding:1rem;font-size:1.5rem;font-weight:800;display:block}.fsm-rule{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.fsm-rule h3{color:#fff;margin-bottom:1rem}.fsm-rule p{color:#ffffffeb;max-width:750px;margin:0 auto}@media (width<=1100px){.fsm-library{grid-template-columns:repeat(2,1fr)}.fsm-examples{grid-template-columns:1fr}}@media (width<=900px){.fsm-track{grid-template-columns:1fr}.fsm-arrow{margin:.5rem auto;transform:rotate(90deg)}}@media (width<=768px){.fsm-machine{padding:1.5rem}.fsm-library{grid-template-columns:1fr}.fsm-factor-card,.fsm-example{padding:1.5rem}.fsm-rule{padding:2rem 1.5rem}}.divisor-detective{position:relative;overflow:hidden}.dd-case{background:linear-gradient(135deg,#14b8a614,#14b8a608);border:1px solid #14b8a61f;border-radius:2rem;margin-top:3rem;padding:2.5rem}.dd-problem{text-align:center;color:var(--division-middle);margin-bottom:2rem;font-size:clamp(2rem,4vw,3rem);font-weight:900}.dd-investigation{grid-template-columns:repeat(3,1fr);gap:1.5rem;display:grid}.dd-clue{background:var(--card-bg);text-align:center;border:2px dashed #14b8a633;border-radius:1.5rem;padding:1.75rem;transition:all .3s}.dd-clue:hover{box-shadow:var(--shadow-md);transform:rotate(-1deg)translateY(-6px)}.dd-clue strong{color:var(--division-middle);margin-top:1rem;font-size:1.4rem;display:block}.dd-verdict{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;border-radius:1.5rem;margin-top:2rem;padding:2rem}.dd-verdict strong{margin:1rem 0;font-size:2rem;font-weight:900;display:block}.dd-verdict span{opacity:.95}.dd-board{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:3rem;display:grid}.dd-board article{background:var(--card-bg);border:1px solid var(--border);text-align:center;border-radius:1.5rem;padding:2rem;transition:all .3s;position:relative}.dd-board article:hover{box-shadow:var(--shadow-md);transform:translateY(-5px)}.dd-board article:before{content:"📌";font-size:1rem;position:absolute;top:.75rem;right:.75rem}.dd-board h3{color:var(--division-middle);margin-bottom:.75rem;font-size:2rem}.dd-board p{color:var(--text-secondary);margin:0;font-weight:700}.dd-challenge{margin-top:4rem}.dd-challenge h3{text-align:center;margin-bottom:2rem}.dd-puzzles{grid-template-columns:repeat(3,1fr);gap:1.5rem;display:grid}.dd-puzzles div{text-align:center;background:var(--card-bg);border:1px solid var(--border);border-radius:1.5rem;padding:2rem;transition:all .3s}.dd-puzzles div:hover{box-shadow:var(--shadow-md);transform:translateY(-5px)}.dd-puzzles span{color:var(--text-secondary);margin-top:.75rem;font-size:.95rem;display:block}.dd-secret{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.dd-secret h3{color:#fff;margin-bottom:1rem}.dd-secret p{color:#ffffffeb;max-width:700px;margin:0 auto}@media (width<=992px){.dd-investigation{grid-template-columns:1fr}.dd-board{grid-template-columns:repeat(2,1fr)}.dd-puzzles{grid-template-columns:1fr}}@media (width<=768px){.dd-case{padding:1.5rem}.dd-board{grid-template-columns:1fr}.dd-clue,.dd-board article,.dd-puzzles div{padding:1.5rem}.dd-verdict strong{font-size:1.6rem}.dd-secret{padding:2rem 1.5rem}}.division-speed-tricks{position:relative;overflow:hidden}.dsa-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:2rem;margin-top:3rem;display:grid}.dsa-card{background:var(--card-bg);border:1px solid var(--border);border-radius:2rem;flex-direction:column;gap:1rem;padding:2rem;transition:transform .3s,box-shadow .3s;display:flex;position:relative;overflow:hidden}.dsa-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}.dsa-card:before{content:"";filter:blur(40px);pointer-events:none;background:#14b8a614;border-radius:50%;width:12rem;height:12rem;position:absolute;top:-5rem;right:-5rem}.dsa-top{align-items:center;gap:1rem;display:flex}.dsa-icon{color:#fff;border-radius:1rem;flex-shrink:0;justify-content:center;align-items:center;width:4rem;height:4rem;font-size:1.5rem;display:flex;box-shadow:0 10px 25px #00000026}.dsa-card:first-child .dsa-icon{background:linear-gradient(135deg,#f59e0b,#fbbf24)}.dsa-card:nth-child(2) .dsa-icon{background:linear-gradient(135deg,#8b5cf6,#a78bfa)}.dsa-card:nth-child(3) .dsa-icon{background:linear-gradient(135deg,#ef4444,#f87171)}.dsa-card:nth-child(4) .dsa-icon{background:linear-gradient(135deg,#06b6d4,#67e8f9)}.dsa-card:nth-child(5) .dsa-icon{background:linear-gradient(135deg,#10b981,#34d399)}.dsa-card:nth-child(6) .dsa-icon{background:linear-gradient(135deg,#f97316,#fb923c)}.dsa-top h3{margin:0;font-size:1.4rem;line-height:1.3}.dsa-section{border:1px solid var(--border);background:#ffffff05;border-radius:1rem;padding:1rem}.dsa-label{color:var(--division-middle);letter-spacing:.08em;text-transform:uppercase;background:#14b8a61a;border-radius:999px;justify-content:center;align-items:center;margin-bottom:.75rem;padding:.35rem .8rem;font-size:.75rem;font-weight:800;display:inline-flex}.dsa-section p{margin:0;line-height:1.7}.dsa-step{background:#14b8a60f;border:1px solid #14b8a61f;border-radius:.9rem;padding:.9rem 1rem;font-weight:700;position:relative}.dsa-step+.dsa-step{margin-top:.75rem}.dsa-answer{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;min-height:4rem;box-shadow:0 12px 25px var(--division-glow);border-radius:1rem;justify-content:center;align-items:center;margin-top:auto;font-size:1.6rem;font-weight:900;display:flex}.dsa-rule{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.dsa-rule h3{color:#fff;margin-bottom:1rem}.dsa-rule p{color:#ffffffeb;max-width:750px;margin:0 auto;line-height:1.8}@media (width<=992px){.dsa-grid{grid-template-columns:1fr}}@media (width<=768px){.dsa-card{padding:1.5rem}.dsa-top{text-align:center;flex-direction:column}.dsa-top h3{font-size:1.25rem}.dsa-answer{font-size:1.35rem}.dsa-rule{padding:2rem 1.5rem}}.division-mistakes{position:relative;overflow:hidden}.dm-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.75rem;margin-top:3rem;display:grid}.dm-card{background:var(--card-bg);border:1px solid var(--border);text-align:center;border-radius:2rem;padding:2rem;transition:transform .3s,box-shadow 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var(--division-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.dm-final h3{color:#fff;margin-bottom:1rem}.dm-final p{color:#ffffffeb;max-width:700px;margin:0 auto;line-height:1.8}@media (width<=1024px){.dm-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=768px){.dm-grid{grid-template-columns:1fr}.dm-card{padding:1.5rem}.dm-final{padding:2rem 1.5rem}}.division-real-life{position:relative;overflow:hidden}.drl-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.75rem;margin-top:3rem;display:grid}.drl-card{background:var(--card-bg);border:1px solid var(--border);border-radius:2rem;flex-direction:column;height:100%;padding:2rem;transition:transform .35s,box-shadow .35s;display:flex;position:relative;overflow:hidden}.drl-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.drl-card:before{content:"";filter:blur(40px);pointer-events:none;background:#14b8a614;border-radius:50%;width:12rem;height:12rem;position:absolute;top:-5rem;right:-5rem}.drl-icon{background:linear-gradient(135deg, var(--division-start), var(--division-middle));width:4.5rem;height:4.5rem;box-shadow:0 12px 30px var(--division-glow);border-radius:1.25rem;justify-content:center;align-items:center;margin-bottom:1.5rem;font-size:2rem;display:flex}.drl-card h3{margin-bottom:1rem;font-size:1.35rem}.drl-problem{background:#3b82f60d;border:1px solid #3b82f61a;border-radius:1rem;margin-bottom:1rem;padding:1rem;font-weight:600;line-height:1.7}.drl-answer{background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;min-height:4rem;box-shadow:0 10px 25px var(--division-glow);border-radius:1rem;justify-content:center;align-items:center;margin-bottom:1rem;font-size:1.3rem;font-weight:900;display:flex}.drl-card p{color:var(--text-secondary);margin-top:auto;line-height:1.8}.drl-conclusion{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));box-shadow:var(--shadow-lg);border-radius:2rem;margin-top:4rem;padding:3rem}.drl-conclusion h3{color:#fff;margin-bottom:1rem}.drl-conclusion p{color:#ffffffeb;max-width:800px;margin:0 auto;line-height:1.9}.drl-card:first-child .drl-icon{background:linear-gradient(135deg,#10b981,#34d399)}.drl-card:nth-child(2) .drl-icon{background:linear-gradient(135deg,#f59e0b,#fbbf24)}.drl-card:nth-child(3) .drl-icon{background:linear-gradient(135deg,#3b82f6,#60a5fa)}.drl-card:nth-child(4) .drl-icon{background:linear-gradient(135deg,#8b5cf6,#a78bfa)}.drl-card:nth-child(5) .drl-icon{background:linear-gradient(135deg,#ef4444,#f87171)}.drl-card:nth-child(6) .drl-icon{background:linear-gradient(135deg,#06b6d4,#67e8f9)}@media (width<=1024px){.drl-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=768px){.drl-grid{grid-template-columns:1fr}.drl-card{padding:1.5rem}.drl-icon{width:4rem;height:4rem;font-size:1.75rem}.drl-answer{font-size:1.15rem}.drl-conclusion{padding:2rem 1.5rem}}.mental-division-faq{position:relative;overflow:hidden}.mdf-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem;margin-top:3rem;display:grid}.mdf-card{background:var(--card-bg);border:1px solid var(--border);border-radius:1.75rem;padding:2rem;transition:transform .3s,box-shadow .3s;position:relative;overflow:hidden}.mdf-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px)}.mdf-card:before{content:"?";background:linear-gradient(135deg, var(--division-start), var(--division-middle));color:#fff;width:2.5rem;height:2.5rem;box-shadow:0 8px 20px var(--division-glow);border-radius:50%;justify-content:center;align-items:center;font-size:1rem;font-weight:800;display:flex;position:absolute;top:1rem;right:1rem}.mdf-card h3{color:var(--heading-color);margin-bottom:1rem;padding-right:3rem;font-size:1.15rem;line-height:1.5}.mdf-card p{color:var(--text-secondary);margin:0;line-height:1.8}.mdf-card:after{content:"";opacity:0;pointer-events:none;background:linear-gradient(135deg,#14b8a608,#0000);transition:opacity .3s;position:absolute;inset:0}.mdf-card:hover:after{opacity:1}@media (width<=992px){.mdf-grid{grid-template-columns:1fr}}@media (width<=768px){.mdf-card{padding:1.5rem}.mdf-card h3{font-size:1.05rem}}.mdf-answer-badge{color:var(--division-middle);background:#14b8a61a;border-radius:999px;margin-bottom:.75rem;padding:.35rem .75rem;font-size:.75rem;font-weight:700;display:inline-flex}.mental-division-cta{padding:2rem 0 4rem;position:relative;overflow:hidden}.mdc-wrapper{text-align:center;background:linear-gradient(135deg, var(--division-start), var(--division-middle));box-shadow:var(--shadow-xl);border-radius:2rem;padding:4rem;position:relative;overflow:hidden}.mdc-wrapper:before{content:"";filter:blur(40px);background:#ffffff1f;border-radius:50%;width:16rem;height:16rem;position:absolute;top:-6rem;right:-6rem}.mdc-badge{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;background:#ffffff26;border-radius:999px;justify-content:center;align-items:center;margin-bottom:1.5rem;padding:.65rem 1.2rem;font-weight:700;display:inline-flex}.mdc-wrapper h2{color:#fff;margin-bottom:1rem;font-size:clamp(2rem,4vw,3.25rem)}.mdc-wrapper p{color:#ffffffeb;max-width:750px;margin:0 auto 2rem;line-height:1.9}.mdc-skills{grid-template-columns:repeat(3,1fr);gap:1rem;margin:2rem 0 3rem;display:grid}.mdc-skill{color:#fff;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffff1f;border-radius:1rem;padding:1rem;font-weight:700}.mdc-actions{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.mdc-primary-btn,.mdc-secondary-btn{border-radius:1rem;padding:1rem 1.5rem;font-weight:700;text-decoration:none;transition:all .3s}.mdc-primary-btn{color:var(--division-middle);background:#fff}.mdc-secondary-btn{color:#fff;background:#ffffff1f;border:1px solid #ffffff40}.mdc-primary-btn:hover,.mdc-secondary-btn:hover{transform:translateY(-3px)}.mdc-quote{color:#fffffff2;background:#ffffff1a;border-radius:1rem;margin-top:3rem;padding:1.25rem;line-height:1.8}@media (width<=768px){.mdc-wrapper{padding:2rem 1.5rem}.mdc-skills{grid-template-columns:1fr}.mdc-actions{flex-direction:column}}.number-sense-hero{background:radial-gradient(circle at 0 0,#10b98126,#0000 30%),radial-gradient(circle at 100% 100%,#3b82f626,#0000 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h1{color:#fff;max-width:12ch;margin:0;font-size:clamp(3rem,6vw,5.5rem);line-height:1.05}.nsh-content h1 span{color:#10b981;margin-top:.5rem;display:block}.nsh-content p{color:#fffc;max-width:60ch;margin:1.75rem 0;font-size:1.05rem;line-height:1.9}.nsh-tags{flex-wrap:wrap;gap:.75rem;margin-bottom:2rem;display:flex}.nsh-tags span{color:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff0f;border:1px solid #ffffff14;border-radius:999px;padding:.75rem 1rem;font-size:.9rem}.nsh-actions{flex-wrap:wrap;gap:1rem;display:flex}.nsh-primary-btn,.nsh-secondary-btn{border-radius:1rem;padding:1rem 1.4rem;font-weight:700;text-decoration:none;transition:all .3s}.nsh-primary-btn{color:#fff;background:linear-gradient(135deg,#10b981,#14b8a6);box-shadow:0 12px 35px #10b98159}.nsh-secondary-btn{color:#fffffff2;background:#ffffff0f;border:1px solid #ffffff14}.nsh-primary-btn:hover,.nsh-secondary-btn:hover{transform:translateY(-4px)}.nsh-showcase{flex-direction:column;align-items:center;gap:1.5rem;display:flex;position:relative}.nsh-main-number{color:#fff;background:linear-gradient(135deg,#10b981,#3b82f6);border-radius:50%;justify-content:center;align-items:center;width:12rem;height:12rem;font-size:clamp(3rem,5vw,5rem);font-weight:900;display:flex;box-shadow:0 20px 60px #10b98159}.nsh-identities{grid-template-columns:repeat(3,1fr);gap:1rem;width:100%;display:grid}.nsh-identities div{text-align:center;color:#fff;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff0f;border:1px solid #ffffff14;border-radius:1rem;padding:1rem;font-weight:700;transition:transform .3s}.nsh-identities div:hover{transform:scale(1.05)}.nsh-secret{text-align:center;color:#fffffff2;background:linear-gradient(135deg,#10b98126,#3b82f626);border:1px solid #ffffff14;border-radius:1rem;padding:1rem 1.5rem;font-weight:700;line-height:1.8}@media (width<=1024px){.nsh-grid{text-align:center;grid-template-columns:1fr}.nsh-content{align-items:center}.nsh-content h1{max-width:none}}@media (width<=768px){.number-sense-hero{padding:4rem 0}.nsh-main-number{width:8rem;height:8rem;font-size:2.5rem}.nsh-identities{grid-template-columns:repeat(2,1fr)}.nsh-actions{flex-direction:column;width:100%}.nsh-primary-btn,.nsh-secondary-btn{width:100%}}.number-identity-lab{position:relative;overflow:hidden}.nil-universe{margin-top:4rem;position:relative}.nil-core{z-index:5;color:#fff;background:linear-gradient(135deg,#10b981,#3b82f6);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:12rem;height:12rem;margin:0 auto;animation:4s ease-in-out infinite nilPulse;display:flex;position:relative;box-shadow:0 25px 80px #10b98159}.nil-core span{opacity:.85;letter-spacing:.08em;text-transform:uppercase;font-size:.85rem}.nil-core strong{margin-top:.25rem;font-size:clamp(3rem,5vw,5rem);line-height:1}@keyframes nilPulse{0%,to{transform:scale(1)}50%{transform:scale(1.04)}}.nil-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;margin-top:-2rem;display:grid}.nil-card{background:var(--card-bg);border:1px solid var(--border);border-radius:1.5rem;padding:1.75rem;transition:all .35s;position:relative;overflow:hidden}.nil-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.nil-card:before{content:"";filter:blur(25px);background:#10b98114;border-radius:50%;width:8rem;height:8rem;position:absolute;top:-3rem;right:-3rem}.nil-card small{color:#10b981;background:#10b9811a;border-radius:999px;margin-bottom:1rem;padding:.4rem .8rem;font-size:.75rem;font-weight:700;display:inline-flex}.nil-card h3{color:var(--heading-color);margin-bottom:.75rem;font-size:clamp(1.5rem,2vw,2rem)}.nil-card p{color:var(--text-secondary);margin:0;line-height:1.8}.nil-card:first-child{border-color:#10b98126}.nil-card:nth-child(2){border-color:#3b82f626}.nil-card:nth-child(3){border-color:#f59e0b26}.nil-card:nth-child(4){border-color:#8b5cf626}.nil-card:nth-child(5){border-color:#ef444426}.nil-card:nth-child(6){border-color:#06b6d426}.nil-secret{text-align:center;background:linear-gradient(135deg,#10b981,#14b8a6);border-radius:2rem;margin-top:4rem;padding:3rem;box-shadow:0 20px 50px #10b98140}.nil-secret h3{color:#fff;margin-bottom:1rem}.nil-secret p{color:#ffffffeb;max-width:700px;margin:0 auto;line-height:1.9}@media (width<=992px){.nil-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.nil-core{width:8rem;height:8rem}.nil-core strong{font-size:2.5rem}.nil-grid{grid-template-columns:1fr;margin-top:2rem}.nil-card{padding:1.5rem}.nil-secret{padding:2rem 1.5rem}}.number-family-tree{position:relative;overflow:hidden}.nft-tree{margin-top:4rem;position:relative}.nft-root{z-index:5;color:#fff;background:linear-gradient(135deg,#f59e0b,#f97316);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:11rem;height:11rem;margin:0 auto;display:flex;position:relative;box-shadow:0 25px 70px #f59e0b59}.nft-root span{text-transform:uppercase;letter-spacing:.08em;opacity:.85;font-size:.8rem}.nft-root strong{margin-top:.25rem;font-size:clamp(3rem,5vw,4.5rem);line-height:1}.nft-tree:before{content:"";background:linear-gradient(#f59e0b80,#0000);width:4px;height:7rem;position:absolute;top:5.5rem;left:50%;transform:translate(-50%)}.nft-branches{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;margin-top:4rem;display:grid}.nft-card{text-align:center;background:var(--card-bg);border:1px solid var(--border);border-radius:1.75rem;padding:2rem 1.5rem;transition:all .35s;position:relative;overflow:hidden}.nft-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.nft-icon{background:#f59e0b1f;border:1px solid #f59e0b26;border-radius:50%;justify-content:center;align-items:center;width:4rem;height:4rem;margin:0 auto 1rem;font-size:1.5rem;display:flex}.nft-card h3{color:var(--heading-color);margin-bottom:.75rem;font-size:1.15rem}.nft-card p{color:var(--text-secondary);margin:0;line-height:1.8}.nft-card:after{content:"";opacity:0;background:linear-gradient(135deg,#f59e0b08,#0000);transition:opacity .3s;position:absolute;inset:0}.nft-card:hover:after{opacity:1}.nft-card:first-child .nft-icon{background:#3b82f61f}.nft-card:nth-child(2) .nft-icon{background:#10b9811f}.nft-card:nth-child(3) .nft-icon{background:#a855f71f}.nft-card:nth-child(4) .nft-icon{background:#ec48991f}.nft-card:nth-child(5) .nft-icon{background:#0ea5e91f}.nft-card:nth-child(6) .nft-icon{background:#f973161f}.nft-secret{text-align:center;background:linear-gradient(135deg,#f59e0b,#f97316);border-radius:2rem;margin-top:4rem;padding:3rem;box-shadow:0 20px 50px #f59e0b40}.nft-secret h3{color:#fff;margin-bottom:1rem}.nft-secret p{color:#ffffffeb;max-width:750px;margin:0 auto;line-height:1.9}@media (width<=992px){.nft-branches{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){.nft-root{width:8rem;height:8rem}.nft-root strong{font-size:2.5rem}.nft-tree:before{height:5rem}.nft-branches{grid-template-columns:1fr;margin-top:3rem}.nft-card{padding:1.5rem}.nft-secret{padding:2rem 1.5rem}}.pattern-vision-training{position:relative;overflow:hidden}.pvt-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:2rem;margin-top:4rem;display:grid}.pvt-card{background:var(--card-bg);border:1px solid var(--border);border-radius:2rem;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.pvt-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.pvt-card:before{content:"";filter:blur(30px);background:#3b82f614;border-radius:50%;width:10rem;height:10rem;position:absolute;top:-4rem;right:-4rem}.pvt-icon{background:#3b82f61a;border:1px solid #3b82f626;border-radius:50%;justify-content:center;align-items:center;width:4rem;height:4rem;margin-bottom:1.25rem;font-size:1.5rem;display:flex}.pvt-card h3{color:var(--heading-color);margin-bottom:1rem;font-size:1.2rem}.pvt-sequence{letter-spacing:.03em;text-align:center;color:var(--heading-color);background:#3b82f60d;border:1px dashed #3b82f626;border-radius:1rem;margin-bottom:1.5rem;padding:1.25rem;font-size:clamp(1rem,2vw,1.3rem);font-weight:800;line-height:1.8}.pvt-question{color:#f59e0b;background:#f59e0b1a;border-radius:999px;align-items:center;gap:.5rem;margin-bottom:1rem;padding:.5rem .9rem;font-size:.85rem;font-weight:700;display:inline-flex}.pvt-answer{color:var(--text-secondary);background:#3b82f60d;border-left:4px solid #3b82f6;border-radius:0 1rem 1rem 0;padding:1rem 1.25rem;line-height:1.8}.pvt-card:first-child .pvt-icon{background:#10b9811a}.pvt-card:nth-child(2) .pvt-icon{background:#3b82f61a}.pvt-card:nth-child(3) .pvt-icon{background:#a855f71a}.pvt-card:nth-child(4) .pvt-icon{background:#f59e0b1a}.pvt-rule{text-align:center;background:linear-gradient(135deg,#3b82f6,#2563eb);border-radius:2rem;margin-top:4rem;padding:3rem;box-shadow:0 20px 50px #3b82f640}.pvt-rule h3{color:#fff;margin-bottom:1rem}.pvt-rule p{color:#ffffffeb;max-width:750px;margin:0 auto;line-height:1.9}@media (width<=992px){.pvt-grid{grid-template-columns:1fr}}@media (width<=768px){.pvt-card{padding:1.5rem}.pvt-sequence{padding:1rem;font-size:1rem}.pvt-rule{padding:2rem 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h3{color:var(--heading-color);margin:0}.hmw-machine{justify-content:center;align-items:center;gap:1rem;margin:2rem 0;display:flex}.hmw-machine span{width:4.5rem;height:4.5rem;color:var(--heading-color);background:#8b5cf614;border:1px solid #8b5cf626;border-radius:1rem;justify-content:center;align-items:center;font-size:1.4rem;font-weight:800;display:flex}.hmw-core{color:#fff;background:linear-gradient(135deg,#8b5cf6,#7c3aed);border-radius:50%;justify-content:center;align-items:center;width:5rem;height:5rem;font-size:1.6rem;font-weight:900;animation:3s infinite hmwPulse;display:flex;box-shadow:0 15px 35px #8b5cf640}@keyframes hmwPulse{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}.hmw-clue{color:var(--text-secondary);background:#f59e0b14;border:1px solid #f59e0b1f;border-radius:1rem;margin-bottom:1rem;padding:1rem;line-height:1.8}.hmw-rule{color:#10b981;background:#10b9811a;border-radius:999px;justify-content:center;align-items:center;padding:.7rem 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h3{color:#fff;margin-bottom:1rem;position:relative}.sd-rule p{color:#ffffffeb;max-width:750px;margin:0 auto;line-height:1.9;position:relative}@media (width<=768px){.sd-card{padding:1.5rem}.sd-top{flex-direction:column;align-items:flex-start}.sd-rule{padding:2rem 1.5rem}}.number-connections{position:relative;overflow:hidden}.nc-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem;margin-top:4rem;display:grid}.nc-card{background:var(--card-bg);border:1px solid var(--border);border-radius:2rem;padding:2rem;transition:all .35s;position:relative;overflow:hidden}.nc-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}.nc-card:before{content:"";filter:blur(35px);background:#3b82f614;border-radius:50%;width:12rem;height:12rem;position:absolute;top:-5rem;right:-5rem}.nc-core{z-index:2;color:#fff;background:linear-gradient(135deg,#3b82f6,#06b6d4);border-radius:50%;justify-content:center;align-items:center;width:7rem;height:7rem;margin:0 auto 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1.25rem}}:root{--white:#fff;--black:#000;--primary:#4f46e5;--secondary:#2563eb;--tertiary:#0ea5e9;--accent:#10b981;--purple-soft:#a5b4fc;--purple-light:#c7d2fe;--blue-info:#7dd3fc;--green-success:#86efac;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--xp:#fbbf24;--xp-light:#fcd34d;--xp-glow:#fbbf2440;--streak:#fb923c;--streak-light:#fdba74;--streak-glow:#fb923c40;--achievement:#f59e0b;--achievement-light:#fcd34d;--achievement-glow:#f59e0b40;--challenge:#06b6d4;--challenge-light:#67e8f9;--challenge-glow:#06b6d440;--skill-tables:#2563eb;--skill-squares:#22c55e;--skill-cubes:#f97316;--skill-square-roots:#ec4899;--skill-cube-roots:#8b5cf6;--skill-addition:#06b6d4;--skill-subtraction:#ef4444;--skill-multiplication:#f59e0b;--skill-division:#14b8a6;--skill-percentage:#ec4899;--skill-fractions:#8b5cf6;--skill-ratio:#84cc16;--skill-average:#eab308;--background:#f8fafc;--surface:#fff;--surface-hover:#4f46e50d;--card-bg:#fff;--card-hover:#4f46e508;--text-primary:#0f1729;--text-secondary:#475569;--text-muted:#64748b;--border:#e2e8f0;--border-strong:#cbd5e1;--hero-start:#4f46e5;--hero-middle:#2563eb;--hero-end:#0ea5e9;--hero-text:#fff;--btn-primary-bg:var(--primary);--btn-primary-hover:#4338ca;--btn-primary-text:#fff;--btn-secondary-bg:#eef2ff;--btn-secondary-hover:#e0e7ff;--btn-secondary-text:var(--primary);--formula-bg:#0ea5e914;--formula-border:var(--tertiary);--shortcut-bg:#22c55e14;--shortcut-border:var(--success);--correct-bg:#22c55e1f;--correct-border:var(--success);--wrong-bg:#ef444414;--wrong-border:var(--danger);--progress-track:#e2e8f0;--progress-fill:var(--primary);--xp-bg:#fbbf241a;--xp-border:var(--xp);--streak-bg:#fb923c1a;--streak-border:var(--streak);--challenge-bg:#06b6d41a;--challenge-border:var(--challenge);--achievement-bg:#f59e0b1a;--achievement-border:var(--achievement);--font-family:Inter, 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#00000014}.mistake-question{color:var(--primary);text-align:center;margin-bottom:1rem;font-size:1.6rem;font-weight:800;line-height:1.4}.mistake-answer-row{gap:1rem;margin-bottom:1rem;display:flex}.answer-box{text-align:center;border-radius:16px;flex:1;padding:1rem;font-weight:700}.answer-box.user{color:#dc2626;background:#ef44441f}.answer-box.correct{color:#16a34a;background:#22c55e1f}.mistake-explanation{background:#3b82f614;border:1px solid #3b82f626;border-radius:16px;margin-top:1rem;padding:1rem}.mistake-explanation h4{color:var(--primary);margin-bottom:.5rem}.mistake-explanation p{color:var(--text-secondary);line-height:1.7}.practice-again-btn{cursor:pointer;color:#fff;background:linear-gradient(135deg, var(--primary), var(--secondary));border:none;border-radius:16px;width:100%;margin-top:1rem;padding:1rem;font-weight:700}.practice-again-btn:hover{opacity:.95}.achievement-unlocked{background:linear-gradient(135deg,#22c55e14,#22c55e05);border:2px solid 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.3s}.practice-weak-btn:hover{transform:translateY(-3px)}@media (width<=768px){.mistakes-grid{grid-template-columns:1fr}.mistake-card{padding:1.25rem}}@media (width<=480px){.mistakes-page{width:94%}.mistake-top{flex-direction:column;align-items:flex-start}.mistakes-header h1{font-size:2rem}.mistake-card h3{font-size:1rem}}.learning-insights{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:24px;margin:2rem 0;padding:1.5rem}.learning-insights h2{margin-bottom:1.25rem;font-size:1.5rem;font-weight:700}.insight-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.insight-card p{font-size:1.1rem;font-weight:700;line-height:1.5}.top-weak-patterns{background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:24px;margin:2rem 0;padding:1.5rem}.top-weak-patterns h2{margin-bottom:1rem;font-size:1.5rem;font-weight:700}.pattern-row{background:var(--surface);border:1px solid 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(width<=768px){.mistake-dashboard,.insight-grid{grid-template-columns:1fr}.pattern-row{flex-direction:column;align-items:flex-start}.mistake-stat-card h3{font-size:1.6rem}.learning-insights h2,.top-weak-patterns h2{font-size:1.25rem}}@media (width<=480px){.learning-insights,.top-weak-patterns,.mistake-stat-card,.insight-card{padding:1rem}}.insight-card{flex-direction:column;justify-content:center;min-height:120px;display:flex}.mistake-tip{display:none}.mistake-card:nth-child(-n+5) .mistake-tip{display:block}.pattern-row{background:#6366f10d;border-radius:18px;padding:1rem 1.25rem}.pattern-row:first-child{border:2px solid gold}.learning-insights{background:var(--card-bg);border:1px solid var(--border);border-radius:24px;margin-bottom:2rem;padding:2rem}.insights-header{margin-bottom:1.5rem}.insights-header h2{margin-bottom:.5rem;font-size:1.5rem}.insights-header p{color:var(--text-muted)}.insight-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;display:grid}.insight-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:1.25rem;transition:all .3s}.insight-card:hover{transform:translateY(-3px)}.insight-card h3{color:var(--text-muted);margin-bottom:.75rem;font-size:.9rem}.insight-card p{font-size:1.15rem;font-weight:700}.load-more-btn{cursor:pointer;color:#fff;background:linear-gradient(135deg,#407d69,#1e8029);border:none;border-radius:18px;grid-column:1/-1;padding:1rem 1.5rem;font-size:1rem;font-weight:700;transition:all .3s}.load-more-btn:hover{transform:translateY(-3px)}.load-more-btn:active{transform:translateY(0)}.load-more-btn:focus-visible{outline:2px solid var(--primary);outline-offset:3px}.load-more-btn svg{width:1rem;height:1rem}@media (width<=768px){.load-more-btn{width:100%;max-width:100%;padding:.9rem 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.3s}.mistake-card:hover{transform:translateY(-4px)}.mistake-card h3{color:var(--primary);margin-bottom:1rem}.mistake-card p{margin-bottom:.5rem}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.dashboard-card,.mission-card,.achievement-item,.quick-action-card,.trophy-card,.mistake-card{animation:.5s fadeInUp}@media (width<=768px){.notebook-header{flex-direction:column;align-items:stretch}.achievement-grid,.quick-actions-grid,.trophy-grid{grid-template-columns:1fr}.achievement-item,.quick-action-card{min-height:auto}.cabinet-header h1{font-size:2.5rem}}@media (width<=480px){.dashboard-header,.daily-missions,.streak-card{padding:1.5rem}.achievement-item,.quick-action-card,.trophy-card{padding:1.25rem}.quick-action-icon,.achievement-icon,.trophy-emoji{font-size:2.25rem}}.trophy-cabinet{max-width:1400px;margin:0 auto;padding:8rem 1rem 4rem}.cabinet-header{text-align:center;margin-bottom:3rem}.cabinet-badge{background:var(--primary);color:#fff;border-radius:999px;margin-bottom:1rem;padding:.6rem 1rem;font-weight:700;display:inline-flex}.cabinet-header h1{margin-bottom:1rem;font-size:clamp(2rem,4vw,3.5rem)}.cabinet-header p{max-width:700px;color:var(--text-secondary);margin:0 auto}.trophy-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}.trophy-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-xl);text-align:center;padding:2rem;transition:all .3s}.trophy-card.unlocked{border:2px solid var(--primary)}.trophy-card.locked{opacity:.65}.trophy-card:hover{transform:translateY(-6px)}.trophy-emoji{margin-bottom:1rem;font-size:3rem}.trophy-card h3{margin-bottom:.75rem}.trophy-card p{color:var(--text-secondary);margin-bottom:1rem}.trophy-status{background:var(--surface);border-radius:999px;padding:.4rem .8rem;font-size:.9rem;display:inline-flex}@media (width<=768px){.trophy-grid{grid-template-columns:1fr}}