@import "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&display=swap";:root{--font-family:"Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--tube-blue:#3b82f6;--tube-blue-glow:#3b82f64d;--tube-green:#10b981;--tube-purple:#8b5cf6;--tube-yellow:#f59e0b;--tube-yellow-glow:#f59e0b59;--tube-pink:#ec4899;--tube-cyan:#06b6d4;--tube-orange:#f97316;--section-header-color:#38bdf8;--bg-body:#0b0f19;--bg-card:#131b2e;--bg-card-hover:#1b2640;--bg-subtle:#1e293b99;--bg-input:#0b0f19;--border-card:#23314d;--border-highlight:#3b82f6;--text-main:#f8fafc;--text-muted:#94a3b8;--text-dim:#64748b;--shadow-card:0 6px 24px -2px #0006, 0 0 0 1px #ffffff0d;--shadow-float:0 12px 32px -4px #0009;--overlay-bg:#070b14d9;--bg-gradient-1:#3b82f617;--bg-gradient-2:#8b5cf617;--logo-gradient:linear-gradient(135deg, #60a5fa, #c084fc)}@media (prefers-color-scheme:light){:root:not([data-theme=dark]){--bg-body:#f8fafc;--bg-card:#fff;--bg-card-hover:#f1f5f9;--bg-subtle:#f1f5f9;--bg-input:#f1f5f9;--border-card:#e2e8f0;--border-highlight:#2563eb;--section-header-color:#0284c7;--text-main:#0f172a;--text-muted:#475569;--text-dim:#64748b;--shadow-card:0 4px 20px -2px #0f172a0f, 0 0 0 1px #0f172a0d;--shadow-float:0 12px 32px -4px #0f172a1f;--overlay-bg:#0f172aa6;--bg-gradient-1:#3b82f60d;--bg-gradient-2:#8b5cf60d;--logo-gradient:linear-gradient(135deg, #1d4ed8, #7c3aed)}}[data-theme=light]{--bg-body:#f8fafc;--bg-card:#fff;--bg-card-hover:#f1f5f9;--bg-subtle:#f1f5f9;--bg-input:#f1f5f9;--border-card:#e2e8f0;--border-highlight:#2563eb;--section-header-color:#0284c7;--text-main:#0f172a;--text-muted:#475569;--text-dim:#64748b;--shadow-card:0 4px 20px -2px #0f172a0f, 0 0 0 1px #0f172a0d;--shadow-float:0 12px 32px -4px #0f172a1f;--overlay-bg:#0f172aa6;--bg-gradient-1:#3b82f60d;--bg-gradient-2:#8b5cf60d;--logo-gradient:linear-gradient(135deg, #1d4ed8, #7c3aed)}[data-theme=dark]{--bg-body:#0b0f19;--bg-card:#131b2e;--bg-card-hover:#1b2640;--bg-subtle:#1e293b99;--bg-input:#0b0f19;--border-card:#23314d;--border-highlight:#3b82f6;--section-header-color:#38bdf8;--text-main:#f8fafc;--text-muted:#94a3b8;--text-dim:#64748b;--shadow-card:0 6px 24px -2px #0006, 0 0 0 1px #ffffff0d;--shadow-float:0 12px 32px -4px #0009;--overlay-bg:#070b14d9;--bg-gradient-1:#3b82f617;--bg-gradient-2:#8b5cf617;--logo-gradient:linear-gradient(135deg, #60a5fa, #c084fc)}*,:before,:after{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html,body{touch-action:manipulation;width:100%;max-width:100%;overflow-x:hidden}body{font-family:var(--font-family);background-color:var(--bg-body);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-image:radial-gradient(circle at 10% 10%, var(--bg-gradient-1) 0%, transparent 45%), radial-gradient(circle at 90% 90%, var(--bg-gradient-2) 0%, transparent 45%);background-attachment:fixed;min-height:100vh;line-height:1.5;transition:background-color .25s,color .25s}button,input,select,textarea{max-width:100%;font-family:inherit}button:focus-visible,[role=button]:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2.5px solid var(--border-highlight);outline-offset:2px}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-body)}::-webkit-scrollbar-thumb{background:var(--border-card);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}.studytube-app{width:100%;max-width:1280px;padding:max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(80px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));margin:0 auto;overflow-x:hidden}.tube-navbar{background:var(--bg-card);border:1px solid var(--border-card);box-shadow:var(--shadow-card);border-radius:20px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-bottom:20px;padding:14px 20px;display:flex}.brand-area{cursor:pointer;border-radius:12px;align-items:center;gap:12px;text-decoration:none;display:flex}.brand-icon-box{color:#fff;background:linear-gradient(135deg,#ef4444,#f97316);border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;padding:10px;font-size:22px;display:flex;box-shadow:0 4px 14px #ef444466}.brand-title{letter-spacing:-.02em;background:var(--logo-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:6px;font-size:19px;font-weight:900;display:flex}.brand-subtitle{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:10px;font-weight:700}.nav-search-wrap{flex:1;min-width:220px;max-width:360px;position:relative}.nav-search-input{background:var(--bg-input);border:1.5px solid var(--border-card);width:100%;color:var(--text-main);border-radius:14px;outline:none;padding:10px 12px 10px 36px;font-size:14px;font-weight:700;transition:border-color .2s,box-shadow .2s}@media (width<=768px){.nav-search-input,input,textarea,select{font-size:16px!important}}.nav-search-input:focus{border-color:var(--border-highlight);box-shadow:0 0 0 3px #3b82f633}.nav-search-icon{color:var(--text-muted);width:16px;height:16px;position:absolute;top:50%;left:11px;transform:translateY(-50%)}.user-gamification-bar{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.stat-pill-btn{background:var(--bg-subtle);border:1px solid var(--border-card);color:var(--text-main);cursor:pointer;white-space:nowrap;-webkit-user-select:none;user-select:none;border-radius:12px;align-items:center;gap:6px;min-height:44px;padding:8px 12px;font-size:12px;font-weight:800;transition:transform .15s,background-color .2s,border-color .2s;display:flex}.stat-pill-btn:hover{background:var(--bg-card-hover);border-color:var(--border-highlight);transform:translateY(-1px)}.stat-pill-btn:active{transform:scale(.97)}.stat-pill-btn.gold{color:#f59e0b;background:#f59e0b26;border-color:#f59e0b66}.stat-pill-btn.purple{color:#8b5cf6;background:#8b5cf626;border-color:#8b5cf666}.stat-pill-btn.flame{color:#ef4444;background:#ef444426;border-color:#ef444466}[data-theme=light] .stat-pill-btn.gold{color:#b45309;background:#f59e0b24;border-color:#f59e0b80}[data-theme=light] .stat-pill-btn.purple{color:#6d28d9;background:#8b5cf624;border-color:#8b5cf680}[data-theme=light] .stat-pill-btn.flame{color:#b91c1c;background:#ef444424;border-color:#ef444480}.category-chips-carousel{-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:8px;margin-bottom:16px;padding-bottom:6px;display:flex;overflow-x:auto}.category-chips-carousel::-webkit-scrollbar{display:none}.category-chip-btn{background:var(--bg-card);border:1.5px solid var(--border-card);color:var(--text-muted);cursor:pointer;white-space:nowrap;min-height:44px;box-shadow:var(--shadow-card);-webkit-user-select:none;user-select:none;border-radius:14px;flex-shrink:0;align-items:center;gap:8px;padding:10px 16px;font-size:13px;font-weight:800;transition:transform .15s,background-color .2s,border-color .2s;display:flex}.category-chip-btn:hover{color:var(--text-main);background:var(--bg-card-hover);transform:translateY(-1px)}.category-chip-btn:active{transform:scale(.97)}.category-chip-btn.active{background:var(--chip-gradient,linear-gradient(135deg, #3b82f6, #1d4ed8));color:#fff;border-color:#0000;box-shadow:0 4px 14px #3b82f659}.tab-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:10px;align-items:center;gap:6px;min-height:44px;padding:10px 16px;font-size:13px;font-weight:800;transition:background-color .2s,color .2s;display:inline-flex}.tab-btn.active{background:var(--bg-subtle);color:var(--text-main);border:1px solid var(--border-card)}.hero-mission-card{background:var(--bg-card);border:1px solid var(--border-card);box-shadow:var(--shadow-card);border-radius:24px;grid-template-columns:1.1fr .9fr;align-items:center;gap:24px;margin-bottom:24px;padding:24px;display:grid;position:relative;overflow:hidden}.hero-mission-card:before{content:"";background:linear-gradient(90deg,#f59e0b,#ef4444,#8b5cf6,#3b82f6);height:5px;position:absolute;top:0;left:0;right:0}.hero-banner-tag{color:#f59e0b;text-transform:uppercase;background:#f59e0b26;border:1px solid #f59e0b66;border-radius:8px;align-items:center;gap:6px;margin-bottom:12px;padding:4px 10px;font-size:11px;font-weight:800;display:inline-flex}.hero-title{letter-spacing:-.02em;color:var(--text-main);margin-bottom:10px;font-size:24px;font-weight:900;line-height:1.25}.hero-desc{color:var(--text-muted);margin-bottom:18px;font-size:13px;line-height:1.5}.hero-action-row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.watch-hero-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#ef4444,#dc2626);border:none;border-radius:14px;align-items:center;gap:8px;min-height:48px;padding:12px 22px;font-size:14px;font-weight:900;transition:transform .15s,box-shadow .2s;display:inline-flex;box-shadow:0 4px 16px #ef444466}.watch-hero-btn:active{transform:scale(.98)}.hero-thumb-wrap{box-shadow:var(--shadow-float);aspect-ratio:16/9;cursor:pointer;background:#000;border-radius:18px;position:relative;overflow:hidden}.hero-thumb-img{object-fit:cover;width:100%;height:100%;transition:transform .3s}.play-overlay-badge{color:#fff;background:#ef4444e6;border-radius:50%;justify-content:center;align-items:center;width:54px;height:54px;transition:transform .2s;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 20px #ef444499}.video-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;width:100%;display:grid}.video-card{background:var(--bg-card);border:1.5px solid var(--border-card);box-shadow:var(--shadow-card);cursor:pointer;border-radius:18px;flex-direction:column;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;position:relative;overflow:hidden}.video-card:active{transform:scale(.98)}.card-thumb-area{aspect-ratio:16/9;background:#000;position:relative;overflow:hidden}.card-thumb-img{object-fit:cover;width:100%;height:100%;transition:transform .3s}.card-duration-badge{color:#fff;background:#000c;border-radius:6px;padding:3px 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(width<=1024px){.studytube-app{padding:max(14px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(80px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left))}.video-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}.hero-mission-card{grid-template-columns:1fr 1fr;gap:18px;padding:20px}}@media (width<=768px){.studytube-app{padding:max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(60px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left))}.tube-navbar{border-radius:18px;gap:12px;margin-bottom:14px;padding:12px 14px}.brand-area{gap:8px}.brand-icon-box{border-radius:12px;padding:8px;font-size:18px}.brand-title{font-size:16px}.brand-subtitle{display:none}.nav-search-wrap{order:3;min-width:100%;max-width:100%}.user-gamification-bar{-webkit-overflow-scrolling:touch;scrollbar-width:none;flex-wrap:nowrap;order:2;gap:6px;width:100%;padding-bottom:4px;overflow-x:auto}.user-gamification-bar::-webkit-scrollbar{display:none}.stat-pill-btn{flex-shrink:0;min-height:44px;padding:8px 12px;font-size:11px}.hero-mission-card{border-radius:18px;grid-template-columns:1fr;gap:14px;padding:16px 14px}.hero-title{font-size:18px}.hero-desc{margin-bottom:12px;font-size:12px}.watch-hero-btn{justify-content:center;width:100%;min-height:48px;padding:12px 16px}.video-grid{grid-template-columns:1fr;gap:14px}@media (width>=480px) and (width<=768px){.video-grid{grid-template-columns:repeat(2,1fr);gap:12px}}.theater-modal-overlay{align-items:flex-end;padding:0}.theater-modal-content{max-height:94vh;padding-bottom:max(24px, env(safe-area-inset-bottom));border-bottom:none;border-radius:24px 24px 0 0}.player-embed-container{border-top-left-radius:24px;border-top-right-radius:24px}.theater-info-pad{padding:16px 14px 40px}.quiz-container{padding:14px 12px}.quiz-option-btn{min-height:48px;padding:12px 14px;font-size:14px}}