@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{--bg-color:#f9fafb;--surface-color:#ffffffb3;--surface-color-solid:#fff;--text-primary:#111827;--text-secondary:#6b7280;--accent-color:#000;--accent-color-hover:#374151;--accent-light:#f3f4f6;--accent-glow:#0000001a;--success-color:#10b981;--danger-color:#ef4444;--warning-color:#f59e0b;--border-color:#00000014;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--border-radius:20px;--border-radius-sm:12px;--border-radius-xs:8px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d}body.dark-theme{--bg-color:#000;--surface-color:#1a1a1a;--surface-color-solid:#1a1a1a;--text-primary:#fff;--text-secondary:#9ca3af;--accent-color:#fff;--accent-color-hover:#d1d5db;--accent-light:#27272a;--accent-glow:#ffffff1a;--border-color:#ffffff26}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-color);color:var(--text-primary);font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;min-height:100dvh;line-height:1.6;transition:background-color .3s,color .3s;display:flex}#root{min-height:100dvh}a{color:var(--text-primary);text-decoration:none;transition:opacity .25s}a:hover{opacity:.7}.glass-panel{background:var(--surface-color);-webkit-backdrop-filter:blur(20px)saturate(150%);border:1px solid var(--border-color);border-radius:var(--border-radius);box-shadow:var(--shadow-sm);transition:all .3s}.glass-panel:hover{box-shadow:var(--shadow-md)}.pill-container{background:var(--surface-color);border:1px solid var(--border-color);border-radius:40px}h1,h2,h3,h4,h5,h6{color:var(--text-primary);font-weight:700;line-height:1.25}h1{letter-spacing:-.02em;font-size:2.5rem;font-weight:800}h2{letter-spacing:-.01em;font-size:1.75rem}h3{font-size:1.25rem}.btn-primary{background:var(--accent-color);color:var(--bg-color);border-radius:var(--border-radius-sm);font-size:1rem;font-weight:600;font-family:var(--font-family);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;transition:all .2s;display:inline-flex}.btn-primary:hover{background:var(--accent-color-hover);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--border-radius-sm);font-size:1rem;font-weight:600;font-family:var(--font-family);cursor:pointer;background:0 0;justify-content:center;align-items:center;gap:8px;padding:12px 24px;transition:all .2s;display:inline-flex}.btn-secondary:hover{background:var(--accent-light);border-color:var(--accent-color)}.icon-button{color:var(--text-primary);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;transition:background .2s;display:inline-flex}.icon-button:hover{background:var(--accent-light)}.input-field{border-radius:var(--border-radius-sm);border:1px solid var(--border-color);background:var(--bg-color);width:100%;color:var(--text-primary);font-family:var(--font-family);outline:none;padding:14px 18px;font-size:1rem;transition:all .25s}.input-field::placeholder{color:var(--text-secondary)}.input-field:focus{border-color:var(--text-primary)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.fade-in-up{animation:.4s ease-out forwards fadeInUp}.container{max-width:1200px;padding:var(--spacing-lg);width:100%;margin:0 auto}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.classroom-container{color:#fff;background:#000;flex-direction:column;height:100dvh;display:flex;position:relative;overflow:hidden}.classroom-topbar{z-index:10;justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.classroom-title-dropdown{cursor:pointer;white-space:nowrap;text-overflow:ellipsis;border-radius:20px;align-items:center;gap:8px;max-width:45vw;padding:8px 16px;font-size:1rem;font-weight:600;transition:background .2s;display:flex;overflow:hidden}.classroom-title-dropdown:hover{background:#ffffff1a}.classroom-main{flex-direction:column;flex:1;justify-content:center;align-items:center;padding:0 24px;display:flex;position:relative}.lottie-container{aspect-ratio:1;justify-content:center;align-items:center;width:100%;max-width:400px;display:flex;position:relative}.classroom-bottom-controls{z-index:10;padding:24px;padding-bottom:max(24px, env(safe-area-inset-bottom));justify-content:center;display:flex}.pill-input-bar{background:#1a1a1a;border-radius:40px;align-items:center;width:100%;max-width:600px;padding:6px;display:flex;box-shadow:0 4px 20px #00000080}.pill-input{color:#fff;font-size:1rem;font-family:var(--font-family);background:0 0;border:none;outline:none;flex:1;min-width:0;padding:12px 16px}.pill-input::placeholder{color:#6b7280}.circle-btn{color:#fff;cursor:pointer;background:#27272a;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;transition:background .2s;display:flex}.circle-btn:hover{background:#3f3f46}.circle-btn.white{color:#000;background:#fff}.circle-btn.white:hover{background:#e5e7eb}.start-lesson-overlay{z-index:5;justify-content:center;width:100%;display:flex;position:absolute;bottom:120px}.btn-glass{-webkit-backdrop-filter:blur(10px);color:#fff;cursor:pointer;background:#ffffff1a;border:1px solid #fff3;transition:all .3s;box-shadow:0 4px 30px #0000001a}.btn-glass:hover{background:#fff3;border:1px solid #ffffff4d;transform:translateY(-1px)}@keyframes pulse{0%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.1)}to{opacity:1;transform:scale(1)}}@keyframes wave{0%,to{transform:scaleY(.5)}50%{transform:scaleY(1)}}@media (width<=768px){.classroom-topbar{padding:12px 16px}.lottie-container{aspect-ratio:1;height:auto}.classroom-bottom-controls{padding:16px}.start-lesson-overlay{bottom:80px}}.home-container{flex-direction:column;min-height:100vh;padding:24px;display:flex}.navbar{border-radius:40px;justify-content:space-between;align-items:center;width:100%;max-width:1200px;margin-bottom:60px;margin-left:auto;margin-right:auto;padding:16px 32px;display:flex}.logo{color:var(--text-primary);align-items:center;gap:12px;display:flex}.nav-links{align-items:center;gap:32px;display:flex}.hero{flex:1;justify-content:center;align-items:center;gap:80px;width:100%;max-width:1200px;margin:0 auto;display:flex}.hero-content{flex:1;max-width:600px}.badge{color:var(--text-secondary);border-radius:30px;align-items:center;gap:8px;margin-bottom:24px;padding:8px 16px;font-size:.9rem;font-weight:600;display:inline-flex}.title{margin-bottom:24px;font-size:4rem;line-height:1.1}.subtitle{color:var(--text-secondary);margin-bottom:40px;font-size:1.25rem;line-height:1.6}.cta-group{flex-wrap:wrap;gap:16px;display:flex}.hero-visual{flex:1;justify-content:center;align-items:center;display:flex}.hero-orb-container{background:var(--surface-color);border-radius:40px;flex-direction:column;justify-content:center;align-items:center;padding:40px;display:flex}@media (width<=992px){.hero{text-align:center;flex-direction:column;gap:60px;padding:20px 0}.hero-content{flex-direction:column;align-items:center;display:flex}.cta-group{justify-content:center}}@media (width<=768px){.home-container{padding:16px}.navbar{margin-bottom:40px;padding:12px 20px}.title{font-size:2.8rem}.subtitle{font-size:1.1rem}.hero-orb-container{padding:24px}.hero-orb-container>div{width:240px!important;height:240px!important}}