*{box-sizing:border-box;margin:0;padding:0}
    body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:#f7f9fb;-webkit-font-smoothing:antialiased;color:#1a1a1a}
    a{color:#0d9488;text-decoration:none}
    a:hover{text-decoration:underline}

    /* ── Sticky header ── */
    .top-bar{
      position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
      border-bottom:1px solid #e5e7eb;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:56px;
    }
    .top-bar-logo{font-weight:800;font-size:1.05rem;color:#065f56;display:flex;align-items:center;gap:8px}
    .top-bar-logo:hover{text-decoration:none}
    .top-bar-links{display:flex;align-items:center;gap:20px;font-size:.88rem}
    .top-bar-links a{color:#555}
    .top-bar-links a:hover{color:#0d9488;text-decoration:none}
    .btn-sm{padding:8px 20px;background:#0d9488;color:#fff!important;border-radius:8px;font-weight:600;font-size:.88rem;transition:background .15s}
    .btn-sm:hover{background:#0a7e73;text-decoration:none!important}

    /* ── Hero ── */
    .hero{
      position:relative;overflow:hidden;
      background:linear-gradient(155deg,#0d9488 0%,#0a7e73 30%,#065f56 60%,#0e8a7d 100%);
      padding:56px 24px 0;color:#fff;
    }
    .hero::before{
      content:'';position:absolute;inset:0;opacity:.35;
      background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23fff' fill-opacity='.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
      pointer-events:none;
    }
    .hero-grid{position:relative;max-width:1060px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
    .hero-text h1{font-size:2.3rem;font-weight:900;line-height:1.22;letter-spacing:-.03em;margin-bottom:16px}
    .hero-text h1 .accent{color:#a7f3d0}
    .hero-text .subtitle{font-size:1.1rem;opacity:.92;line-height:1.6;margin-bottom:28px}
    .hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
    .btn-hero{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:10px;font-size:1rem;font-weight:700;border:none;cursor:pointer;transition:all .15s}
    .btn-hero-primary{background:#fff;color:#065f56}
    .btn-hero-primary:hover{background:#f0fdfa;text-decoration:none}
    .btn-hero-secondary{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.3)}
    .btn-hero-secondary:hover{background:rgba(255,255,255,.25);text-decoration:none}
    .hero-note{font-size:.85rem;opacity:.7}
    .hero-mockup{position:relative;display:flex;justify-content:center;padding-bottom:24px}
    .mockup-browser{
      background:#fff;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden;width:100%;max-width:480px;
    }
    .mockup-topbar{background:#f1f5f9;padding:8px 14px;display:flex;align-items:center;gap:6px}
    .mockup-dot{width:8px;height:8px;border-radius:50%;background:#cbd5e1}
    .mockup-url{flex:1;background:#fff;border-radius:4px;padding:3px 10px;font-size:.7rem;color:#94a3b8;margin-left:8px}
    .mockup-body{padding:20px}
    .mockup-body .m-badge,.mockup-slide .m-badge{display:inline-block;background:#d1fae5;color:#065f56;padding:3px 10px;border-radius:6px;font-size:.7rem;font-weight:600;margin-bottom:10px}
    .mockup-body h4,.mockup-slide h4{font-size:.95rem;font-weight:700;margin-bottom:8px;color:#1a1a1a}
    .mockup-body .m-text,.mockup-slide .m-text{font-size:.8rem;color:#555;line-height:1.6;margin-bottom:12px}
    .mockup-body .m-gap,.mockup-slide .m-gap{display:inline-block;border-bottom:2px dashed #0d9488;min-width:80px;margin:0 2px;position:relative}
    .mockup-body .m-gap-filled,.mockup-slide .m-gap-filled{border-bottom-color:#10b981;color:#065f56;font-weight:600}
    .mockup-body .m-check,.mockup-slide .m-check{color:#10b981;font-size:.75rem;margin-left:4px}
    .mockup-body .m-progress,.mockup-slide .m-progress{background:#e5e7eb;height:6px;border-radius:3px;margin-top:14px;overflow:hidden}
    .mockup-body .m-progress-fill,.mockup-slide .m-progress-fill{height:100%;background:linear-gradient(90deg,#0d9488,#10b981);border-radius:3px;transition:width .4s}
    .mockup-body .m-progress-label,.mockup-slide .m-progress-label{font-size:.7rem;color:#888;margin-top:4px;text-align:right}

    /* ── Mockup slider ── */
    .mockup-slider{position:relative;overflow:hidden}
    .mockup-track{display:flex;transition:transform .4s cubic-bezier(.4,0,.2,1)}
    .mockup-slide{min-width:100%;padding:20px}
    .slider-arrows{position:absolute;top:50%;left:0;right:0;display:flex;justify-content:space-between;pointer-events:none;transform:translateY(-50%);padding:0 6px}
    .slider-arrow{width:28px;height:28px;border-radius:50%;background:rgba(13,148,136,.85);color:#fff;border:none;cursor:pointer;font-size:.85rem;display:flex;align-items:center;justify-content:center;pointer-events:auto;transition:background .15s;box-shadow:0 2px 6px rgba(0,0,0,.15)}
    .slider-arrow:hover{background:#065f56}
    .slider-dots{display:flex;justify-content:center;gap:6px;padding:10px 0 4px}
    .slider-dot{width:7px;height:7px;border-radius:50%;background:#e5e7eb;border:none;cursor:pointer;padding:0;transition:background .2s}
    .slider-dot.active{background:#0d9488}

    /* ── Feature slide variants ── */
    .m-chat{display:flex;flex-direction:column;gap:8px;margin-bottom:10px}
    .m-chat-bubble{padding:8px 12px;border-radius:10px;font-size:.78rem;line-height:1.5;max-width:88%}
    .m-chat-user{background:#e0f2fe;color:#1e3a5f;align-self:flex-end;border-bottom-right-radius:3px}
    .m-chat-ai{background:#d1fae5;color:#065f56;align-self:flex-start;border-bottom-left-radius:3px}
    .m-chat-typing{align-self:flex-start;color:#999;font-size:.72rem;font-style:italic}

    .m-test-opt{display:flex;align-items:center;gap:8px;padding:7px 10px;border:1px solid #e5e7eb;border-radius:7px;font-size:.78rem;margin-bottom:5px;color:#333}
    .m-test-opt.m-correct{border-color:#10b981;background:#d1fae5}
    .m-test-opt.m-wrong{border-color:#ef4444;background:#fef2f2;text-decoration:line-through;color:#999}
    .m-test-radio{width:14px;height:14px;border-radius:50%;border:2px solid #d1d5db;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.55rem}
    .m-test-opt.m-correct .m-test-radio{border-color:#10b981;background:#10b981;color:#fff}
    .m-test-opt.m-wrong .m-test-radio{border-color:#ef4444;background:#ef4444;color:#fff}

    .m-srs-front{background:#f0fdf4;border:1px dashed #86efac;border-radius:10px;padding:14px;text-align:center;margin-bottom:8px}
    .m-srs-front .m-srs-q{font-size:.85rem;font-weight:600;color:#065f56}
    .m-srs-btns{display:flex;gap:6px;justify-content:center}
    .m-srs-btn{padding:5px 14px;border-radius:6px;font-size:.7rem;font-weight:600;border:1px solid #e5e7eb;background:#fff;color:#555}
    .m-srs-btn.m-srs-hard{border-color:#f87171;color:#ef4444}
    .m-srs-btn.m-srs-good{border-color:#10b981;color:#059669}
    .m-srs-btn.m-srs-easy{border-color:#0d9488;color:#0d9488;background:#d1fae5}

    .m-league-row{display:flex;align-items:center;gap:8px;padding:5px 0;font-size:.78rem;border-bottom:1px solid #f1f5f9}
    .m-league-pos{width:18px;font-weight:700;color:#888;text-align:center}
    .m-league-pos.gold{color:#f59e0b}
    .m-league-name{flex:1;color:#333}
    .m-league-name.me{color:#0d9488;font-weight:700}
    .m-league-xp{font-weight:600;color:#0d9488;font-size:.75rem}
    .m-league-header{display:flex;align-items:center;gap:6px;margin-bottom:8px;font-size:.72rem;color:#888}

    .m-skill-tree{display:flex;flex-direction:column;gap:4px;align-items:center}
    .m-skill-row{display:flex;gap:8px;align-items:center}
    .m-skill-node{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;border:2px solid}
    .m-skill-node.done{border-color:#10b981;background:#d1fae5;color:#065f56}
    .m-skill-node.current{border-color:#0d9488;background:#fff;color:#0d9488;box-shadow:0 0 0 3px rgba(13,148,136,.2)}
    .m-skill-node.locked{border-color:#e5e7eb;background:#f9fafb;color:#d1d5db}
    .m-skill-line{width:1px;height:10px;background:#e5e7eb;margin:0 auto}

    .m-gia-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
    .m-gia-timer{font-size:.75rem;color:#ef4444;font-weight:600}
    .m-gia-qnum{font-size:.7rem;color:#888}
    .m-gia-case{font-size:.78rem;color:#555;line-height:1.5;margin-bottom:10px;padding:10px;background:#f8fafc;border-radius:8px;border-left:3px solid #0d9488}

    .m-scale-result{text-align:center;padding:10px;background:#f0fdf4;border-radius:10px;border:1px solid #bbf7d0}
    .m-scale-score{font-size:1.5rem;font-weight:800;color:#0d9488}
    .m-scale-interp{font-size:.78rem;color:#555;margin-top:2px}

    /* ── Live activity toast (FOMO) ── */
    .live-toast{
      position:fixed;bottom:24px;left:24px;z-index:90;
      background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:14px 18px;
      box-shadow:0 8px 30px rgba(0,0,0,.12);max-width:320px;
      display:flex;align-items:center;gap:10px;font-size:.85rem;color:#333;
      transform:translateY(120%);opacity:0;transition:transform .4s cubic-bezier(.4,0,.2,1),opacity .4s;
    }
    .live-toast.show{transform:translateY(0);opacity:1}
    .live-toast-icon{font-size:1.2rem;flex-shrink:0}
    .live-toast-time{font-size:.75rem;color:#999;margin-top:2px}
    .live-toast-dot{width:8px;height:8px;border-radius:50%;background:#10b981;flex-shrink:0;animation:pulse-dot 2s infinite}
    @keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.4}}

    /* ── Mini quiz (Zeigarnik) ── */
    .quiz-section{max-width:680px;margin:0 auto}
    .quiz-card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:28px;margin-bottom:16px}
    .quiz-card .q-subject{font-size:.75rem;font-weight:600;color:#0d9488;text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
    .quiz-card .q-text{font-size:1rem;font-weight:600;margin-bottom:16px;line-height:1.5}
    .quiz-options{display:flex;flex-direction:column;gap:8px}
    .quiz-opt{
      padding:12px 16px;border:1px solid #e5e7eb;border-radius:8px;cursor:pointer;font-size:.9rem;
      transition:all .15s;display:flex;align-items:center;gap:10px;background:#fff;
    }
    .quiz-opt:hover{border-color:#0d9488;background:#f0fdfa}
    .quiz-opt.selected{border-color:#0d9488;background:#d1fae5}
    .quiz-opt.correct{border-color:#10b981;background:#d1fae5}
    .quiz-opt.wrong{border-color:#ef4444;background:#fef2f2}
    .quiz-opt-marker{width:20px;height:20px;border-radius:50%;border:2px solid #d1d5db;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.7rem;transition:all .15s}
    .quiz-opt.selected .quiz-opt-marker,.quiz-opt.correct .quiz-opt-marker{border-color:#10b981;background:#10b981;color:#fff}
    .quiz-opt.wrong .quiz-opt-marker{border-color:#ef4444;background:#ef4444;color:#fff}
    .quiz-result{margin-top:16px;padding:16px;border-radius:10px;background:#f0fdf4;border:1px solid #bbf7d0;text-align:center;display:none}
    .quiz-result.visible{display:block}
    .quiz-result .qr-score{font-size:1.3rem;font-weight:800;color:#065f56}
    .quiz-result .qr-text{font-size:.88rem;color:#555;margin-top:4px}
    .quiz-locked{text-align:center;padding:20px;color:#888;font-size:.9rem}
    .quiz-locked a{font-weight:600}

    /* ── Progress phantom (Zeigarnik) ── */
    .progress-phantom{max-width:680px;margin:0 auto;background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:28px;position:relative;overflow:hidden}
    .pp-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
    .pp-header h3{font-size:1.1rem;font-weight:700;margin:0}
    .pp-header .pp-pct{font-size:1.5rem;font-weight:800;color:#ef4444}
    .pp-bar-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}
    .pp-bar-label{font-size:.82rem;color:#555;width:120px;flex-shrink:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .pp-bar{flex:1;background:#f1f5f9;height:8px;border-radius:4px;overflow:hidden}
    .pp-bar-fill{height:100%;border-radius:4px;background:#e5e7eb;width:0;transition:width 1s ease}
    .pp-bar-fill.red{background:linear-gradient(90deg,#ef4444,#f87171)}
    .pp-bar-pct{font-size:.75rem;color:#999;width:32px;text-align:right}
    .pp-cta{text-align:center;margin-top:20px}
    .pp-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,transparent 30%,rgba(255,255,255,.92) 70%);display:flex;align-items:flex-end;justify-content:center;padding-bottom:20px}

    /* ── Social proof bar ── */
    .social-proof{background:#fff;border-bottom:1px solid #e5e7eb;padding:18px 24px}
    .social-proof-inner{max-width:900px;margin:0 auto;display:flex;align-items:center;justify-content:center;gap:32px;flex-wrap:wrap;font-size:.88rem;color:#666}
    .sp-item{display:flex;align-items:center;gap:6px;white-space:nowrap}
    .sp-num{font-weight:800;color:#0d9488;font-size:1.05rem}

    /* ── Stats ── */
    .stats{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;padding:0 24px;margin:-32px auto 0;position:relative;z-index:2;max-width:800px}
    .stat-card{background:#fff;border-radius:14px;padding:20px 28px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.08);flex:1;min-width:140px}
    .stat-num{font-size:2rem;font-weight:800;color:#0d9488}
    .stat-label{font-size:.85rem;color:#666;margin-top:2px}

    /* ── Sections ── */
    .section{max-width:900px;margin:0 auto;padding:56px 24px 0}
    .section h2{font-size:1.55rem;font-weight:700;margin:0 0 6px;color:#1a1a1a;text-align:center}
    .section-subtitle{text-align:center;color:#666;margin:0 0 32px;font-size:1rem;line-height:1.6}

    /* ── Steps (how it works) ── */
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
    .step{text-align:center;position:relative}
    .step::before{counter-increment:step;content:counter(step);display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:#d1fae5;color:#065f56;font-weight:800;font-size:1.15rem;margin:0 auto 12px}
    .step h3{font-size:1rem;font-weight:700;margin-bottom:6px}
    .step p{font-size:.88rem;color:#555;line-height:1.5}
    .step-arrow{display:none;position:absolute;right:-18px;top:20px;font-size:1.2rem;color:#0d9488}

    /* ── Features ── */
    .features{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
    .feature-card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:24px;transition:box-shadow .2s}
    .feature-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.06)}
    .feature-icon{font-size:1.5rem;margin-bottom:8px}
    .feature-card h3{font-size:1.05rem;font-weight:700;margin:0 0 6px}
    .feature-card p{font-size:.9rem;color:#555;line-height:1.5;margin:0}

    /* ── Subjects ── */
    .subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
    .subject-chip{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#fff;border:1px solid #e5e7eb;border-radius:10px;font-size:.9rem;color:#333;transition:border-color .2s,box-shadow .2s}
    .subject-chip:hover{border-color:#0d9488;box-shadow:0 2px 8px rgba(13,148,136,.1);text-decoration:none}
    .subject-emoji{font-size:1.1rem}
    .subjects-hidden{display:none}
    .subjects-hidden.visible{display:grid}
    .show-all-btn{display:block;margin:16px auto 0;padding:10px 24px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;cursor:pointer;font-size:.9rem;color:#0d9488;font-weight:600;transition:border-color .15s}
    .show-all-btn:hover{border-color:#0d9488}

    /* ── Testimonials ── */
    .testimonials{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
    .testimonial{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:24px}
    .testimonial-text{font-size:.92rem;color:#333;line-height:1.6;margin-bottom:14px;font-style:italic}
    .testimonial-author{display:flex;align-items:center;gap:10px}
    .testimonial-avatar{width:36px;height:36px;border-radius:50%;background:#d1fae5;display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;color:#065f56}
    .testimonial-meta{font-size:.82rem}
    .testimonial-name{font-weight:600;color:#1a1a1a}
    .testimonial-desc{color:#888}

    /* ── Pricing teaser ── */
    .pricing-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;max-width:760px;margin:0 auto}
    .pricing-card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:28px 24px;text-align:center;position:relative;transition:box-shadow .2s}
    .pricing-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.06)}
    .pricing-card.popular{border-color:#0d9488;box-shadow:0 0 0 1px #0d9488}
    .pricing-badge{position:absolute;top:-10px;left:50%;transform:translateX(-50%);background:#0d9488;color:#fff;font-size:.72rem;font-weight:700;padding:3px 14px;border-radius:20px;white-space:nowrap}
    .pricing-card h3{font-size:1.05rem;font-weight:700;margin-bottom:4px}
    .pricing-price{font-size:2rem;font-weight:800;color:#0d9488;margin:8px 0 4px}
    .pricing-price span{font-size:.9rem;font-weight:500;color:#888}
    .pricing-note{font-size:.82rem;color:#888;margin-bottom:16px}
    .pricing-features{list-style:none;padding:0;margin:0 0 20px;text-align:left}
    .pricing-features li{padding:6px 0;font-size:.88rem;color:#555;display:flex;align-items:flex-start;gap:8px}
    .pricing-features li::before{content:'\2713';color:#10b981;font-weight:700;flex-shrink:0}
    .btn-pricing{display:inline-block;width:100%;padding:12px;border-radius:8px;font-weight:600;font-size:.92rem;text-align:center;transition:all .15s}
    .btn-pricing-primary{background:#0d9488;color:#fff}
    .btn-pricing-primary:hover{background:#0a7e73;text-decoration:none}
    .btn-pricing-outline{background:#fff;border:1px solid #e5e7eb;color:#333}
    .btn-pricing-outline:hover{border-color:#0d9488;text-decoration:none}

    /* ── Tools ── */
    .tools-row{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
    .tool-chip{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;font-size:.9rem;color:#333;transition:border-color .2s}
    .tool-chip:hover{border-color:#0d9488;text-decoration:none}

    /* ── FAQ ── */
    .faq-list{max-width:700px;margin:0 auto}
    .faq-item{border-bottom:1px solid #e5e7eb}
    .faq-q{display:flex;align-items:center;justify-content:space-between;padding:18px 0;cursor:pointer;font-size:1rem;font-weight:600;color:#1a1a1a;gap:12px;-webkit-user-select:none;user-select:none}
    .faq-q::after{content:'+';font-size:1.3rem;color:#0d9488;flex-shrink:0;transition:transform .2s}
    .faq-item.open .faq-q::after{transform:rotate(45deg)}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:.92rem;color:#555;line-height:1.7}
    .faq-item.open .faq-a{max-height:500px}
    .faq-a-inner{padding:0 0 18px}

    /* ── Urgency banner ── */
    .urgency{max-width:680px;margin:48px auto 0;background:linear-gradient(135deg,#fef3c7,#fff7ed);border:1px solid #fde68a;border-radius:14px;padding:24px 28px;display:flex;align-items:flex-start;gap:14px}
    .urgency-icon{font-size:1.5rem;flex-shrink:0;margin-top:2px}
    .urgency h3{font-size:1rem;font-weight:700;color:#92400e;margin-bottom:4px}
    .urgency p{font-size:.9rem;color:#78350f;line-height:1.5;margin:0}

    /* ── CTA bottom ── */
    .cta-bottom{max-width:640px;margin:56px auto 0;padding:40px 32px;text-align:center;background:linear-gradient(135deg,#0d9488,#065f56);border-radius:18px;color:#fff}
    .cta-bottom h2{color:#fff;margin:0 0 8px;font-size:1.4rem}
    .cta-bottom p{opacity:.9;margin:0 0 24px;font-size:1rem}

    /* ── Footer ── */
    .landing-footer{max-width:900px;margin:48px auto 0;padding:24px 24px 40px;border-top:1px solid #e5e7eb;display:flex;flex-wrap:wrap;gap:16px 24px;justify-content:center;font-size:.85rem}
    .landing-footer a{color:#888}
    .landing-footer a:hover{color:#0d9488}

    /* ── Demo overlay ── */
    .brain-overlay{position:fixed;inset:0;background:#f7f9fb;display:none;flex-direction:column;align-items:center;justify-content:center;z-index:1000;padding:24px}
    .brain-overlay.visible{display:flex}
    .brain-icon{font-size:4rem;margin-bottom:20px;animation:brain-pulse 1.5s ease-in-out infinite}
    @keyframes brain-pulse{0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.85;transform:scale(1.05)}}
    .brain-overlay p{margin:0;font-size:1rem;color:#666;text-align:center}

    /* ── Desktop step arrows ── */
    @media (min-width:641px){
      .step-arrow{display:block}
    }

    /* ── Hero urgency (loss aversion) ── */
    .hero-urgency{
      display:inline-flex;align-items:center;gap:8px;
      background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
      border-radius:8px;padding:8px 16px;font-size:.85rem;margin-top:12px;
      color:rgba(255,255,255,.92);
    }
    .hero-urgency-dot{width:8px;height:8px;border-radius:50%;background:#f87171;flex-shrink:0;animation:pulse-dot 2s infinite}
    .hero-urgency strong{color:#fbbf24}

    /* ── University tags ── */
    .uni-logos{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:24px}
    .uni-tag{padding:4px 12px;background:#f0fdfa;border:1px solid #d1fae5;border-radius:20px;font-size:.78rem;color:#065f56;white-space:nowrap}

    /* ── Student showcase ── */
    .student-showcase{max-width:680px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .student-profile{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:24px}
    .student-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}
    .grade-journal{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:24px}
    .grade-table{width:100%;border-collapse:collapse;font-size:.9rem}
    .grade-table th{text-align:left;font-size:.78rem;color:#888;font-weight:500;padding:6px 8px;border-bottom:1px solid #e5e7eb}
    .grade-table td{padding:8px;border-bottom:1px solid #f1f5f9}
    .grade-before{font-weight:700;color:#ef4444;text-align:center;font-size:1.1rem}
    .grade-arrow{text-align:center;color:#888}
    .grade-after{font-weight:700;color:#10b981;text-align:center;font-size:1.1rem}

    /* ── Comparison table ── */
    .comparison-wrap{overflow-x:auto;margin:0 -24px;padding:0 24px}
    .comparison-table{width:100%;border-collapse:collapse;font-size:.88rem;min-width:600px}
    .comparison-table th{padding:10px 12px;text-align:center;font-size:.82rem;font-weight:600;background:#f8fafc;border-bottom:2px solid #e5e7eb}
    .comparison-table th:first-child{text-align:left}
    .comparison-table th:nth-child(2){color:#0d9488;background:#f0fdfa}
    .comparison-table td{padding:10px 12px;text-align:center;border-bottom:1px solid #f1f5f9}
    .comparison-table td:first-child{text-align:left;font-weight:500}
    .ct-label{color:#555}
    .ct-hl{background:#f0fdfa;font-weight:600;color:#065f56}
    .ct-yes{color:#10b981;font-weight:700;font-size:1.1rem}
    .ct-no{color:#ef4444;font-size:1.1rem}
    .ct-part{color:#f59e0b;font-size:.82rem}

    /* ── Video demo placeholder ── */
    .video-demo-placeholder{
      max-width:680px;margin:0 auto;background:linear-gradient(135deg,#1a1a2e,#16213e);
      border-radius:16px;padding:48px 32px;display:flex;flex-direction:column;align-items:center;
      justify-content:center;cursor:pointer;transition:transform .15s,box-shadow .15s;
    }
    .video-demo-placeholder:hover{transform:scale(1.01);box-shadow:0 8px 32px rgba(13,148,136,.25)}
    .video-play-btn{
      width:64px;height:64px;border-radius:50%;background:rgba(13,148,136,.9);
      display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;
      margin-bottom:16px;box-shadow:0 4px 20px rgba(13,148,136,.4);
    }
    .video-demo-text{text-align:center;color:#fff}

    /* ── Quiz feedback ── */
    .quiz-feedback{padding:10px 14px;border-radius:8px;font-size:.85rem;margin-top:12px;animation:fadeIn .3s}
    .quiz-fb-ok{background:#d1fae5;color:#065f56;border:1px solid #bbf7d0}
    .quiz-fb-wrong{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
    @keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}

    /* ── Pricing compare note ── */
    .pricing-compare{font-size:.78rem;color:#888;margin-top:10px;text-align:center;font-style:italic}

    /* ── Guarantee badge ── */
    .guarantee-badge{
      max-width:680px;margin:20px auto 0;display:flex;align-items:center;gap:12px;
      padding:14px 20px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;
      font-size:.88rem;color:#065f56;
    }

    /* ── Mobile ── */
    @media (max-width:640px){
      .student-showcase{grid-template-columns:1fr}
      .comparison-table{min-width:500px}
      .top-bar-links .nav-link{display:none}
      .hero{padding:40px 20px 0}
      .hero-grid{grid-template-columns:1fr;text-align:center}
      .hero-text h1{font-size:1.65rem}
      .hero-text .subtitle{font-size:1rem}
      .hero-cta{justify-content:center}
      .hero-mockup{padding-bottom:16px}
      .mockup-browser{max-width:340px}
      .social-proof-inner{gap:16px;font-size:.82rem}
      .stats{gap:12px;margin-top:-24px}
      .stat-card{padding:14px 16px;min-width:0}
      .stat-num{font-size:1.5rem}
      .section{padding-top:40px}
      .section h2{font-size:1.3rem}
      .steps{grid-template-columns:1fr;gap:20px}
      .step-arrow{display:none!important}
      .features{grid-template-columns:1fr}
      .subjects-grid{grid-template-columns:1fr 1fr}
      .pricing-cards{grid-template-columns:1fr}
      .cta-bottom{margin:40px 16px 0;padding:28px 20px}
      .urgency{margin:32px 16px 0}
    }