:root{--bg-primary: #07070b;--bg-secondary: #0e0e13;--bg-tertiary: #14141b;--bg-elevated: #1a1a24;--home-header-bg: rgba(14, 14, 19, .92);--home-sidebar-bg: #0c0c11;--home-accent: #8b5cf6;--home-accent-hover: #7c3aed;--home-input-bg: rgba(255, 255, 255, .06);--home-shadow: 0 1px 3px rgba(0, 0, 0, .35);--glass-bg: rgba(20, 20, 28, .78);--glass-bg-hover: rgba(30, 30, 40, .88);--glass-border: rgba(255, 255, 255, .06);--glass-border-focus: rgba(139, 92, 246, .45);--accent: #8b5cf6;--accent-soft: rgba(139, 92, 246, .14);--accent-hover: #a78bfa;--accent-purple: #8b5cf6;--accent-purple-glow: rgba(139, 92, 246, .28);--accent-cyan: #c4b5fd;--accent-cyan-glow: rgba(196, 181, 253, .2);--accent-red: #fb7185;--accent-red-glow: rgba(251, 113, 133, .28);--accent-green: #4ade80;--accent-live: #f43f5e;--accent-live-glow: rgba(244, 63, 94, .35);--text-primary: #f4f4f5;--text-secondary: #a1a1aa;--text-muted: #71717a;--font-family-title: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-family-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--shadow-main: 0 12px 40px rgba(0, 0, 0, .45);--shadow-soft: 0 4px 20px rgba(0, 0, 0, .25);--blur-amount: 20px;--radius-xl: 24px;--radius-lg: 18px;--radius-md: 12px;--radius-sm: 8px;--header-height: 60px;--controlbar-height: 76px;--sidebar-width: 340px}*{box-sizing:border-box;margin:0;padding:0}body{background:radial-gradient(ellipse 80% 50% at 20% -10%,rgba(139,92,246,.08) 0%,transparent 55%),radial-gradient(ellipse 60% 40% at 90% 100%,rgba(99,102,241,.06) 0%,transparent 50%),var(--bg-primary);color:var(--text-primary);font-family:var(--font-family-body);font-size:15px;line-height:1.5;height:100vh;overflow:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-family:var(--font-family-title);font-weight:600;letter-spacing:-.01em}@keyframes float{0%{transform:translateY(0) rotate(0)}50%{transform:translateY(-15px) rotate(3deg)}to{transform:translateY(0) rotate(0)}}@keyframes float-reverse{0%{transform:translateY(0) rotate(0)}50%{transform:translateY(15px) rotate(-3deg)}to{transform:translateY(0) rotate(0)}}@keyframes pulse-live{0%{transform:scale(.97);box-shadow:0 0 0 0 var(--accent-live-glow)}70%{transform:scale(1);box-shadow:0 0 0 6px transparent}to{transform:scale(.97);box-shadow:0 0 0 0 transparent}}@keyframes slide-up{0%{transform:translateY(100%) translate(-50%);opacity:0}to{transform:translateY(0) translate(-50%);opacity:1}}@keyframes fade-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:#ffffff03}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#ffffff40}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(var(--blur-amount));-webkit-backdrop-filter:blur(var(--blur-amount));border:1px solid var(--glass-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-main);transition:all .3s cubic-bezier(.4,0,.2,1)}.glass-panel:hover{background:var(--glass-bg-hover);border-color:#ffffff1f}.lobby-bg-glow{position:absolute;top:-10%;left:-10%;width:50vw;height:50vw;background:radial-gradient(circle,#8b5cf61a,#0000 70%);z-index:0;pointer-events:none;animation:float 12s ease-in-out infinite}.lobby-bg-glow-2{position:absolute;bottom:-10%;right:-10%;width:50vw;height:50vw;background:radial-gradient(circle,#6366f114,#0000 70%);z-index:0;pointer-events:none;animation:float-reverse 15s ease-in-out infinite}.btn-primary{background:linear-gradient(135deg,var(--accent) 0%,#7c3aed 100%);border:none;color:#fff;padding:12px 24px;font-family:var(--font-family-title);font-weight:500;border-radius:var(--radius-md);cursor:pointer;box-shadow:0 4px 16px var(--accent-purple-glow);transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:8px}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 24px var(--accent-purple-glow);background:linear-gradient(135deg,var(--accent-hover) 0%,var(--accent) 100%)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:#ffffff0d;border:1px solid var(--glass-border);color:var(--text-primary);padding:12px 24px;font-family:var(--font-family-title);font-weight:500;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:8px}.btn-secondary:hover{background:#ffffff1a;border-color:#fff3}.input-group{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}.input-group label{color:var(--text-secondary);font-size:13px;font-weight:500;text-transform:uppercase;letter-spacing:.05em}.input-group input,.input-group select{background:#ffffff0a;border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:14px 16px;color:#fff;font-family:var(--font-family-body);font-size:15px;outline:none;transition:all .3s ease}.input-group input:focus,.input-group select:focus{border-color:var(--accent-purple);box-shadow:0 0 0 3px var(--accent-purple-glow);background:#ffffff14}.input-group input::placeholder{color:var(--text-muted)}.container-full{height:100vh;width:100vw;display:flex;flex-direction:column;position:relative;overflow:hidden}.meeting-workspace{flex:1;display:flex;position:relative;height:calc(100vh - var(--controlbar-height));width:100%}.video-section{flex:1;display:flex;flex-direction:column;padding:16px 16px 16px 20px;position:relative;gap:16px;transition:all .3s ease;min-width:0}.video-grid-container{flex:1;display:grid;grid-template-columns:1fr;grid-template-rows:1fr;gap:16px;width:100%;height:100%;position:relative}.stream-player-card,.youtube-player-card{position:relative;width:100%;height:100%;border-radius:var(--radius-xl);overflow:hidden;background:#000;box-shadow:var(--shadow-main);border:1px solid var(--glass-border)}.stream-player-placeholder,.youtube-player-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:radial-gradient(circle at 50% 40%,rgba(139,92,246,.08) 0%,transparent 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iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:none;transform:none;pointer-events:none}.stream-native-video{object-fit:contain;background:#000}.stream-error-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:5;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:24px;text-align:center;background:#000000bf;color:var(--text-secondary);font-size:14px}.stream-mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:5px;background:#00000059;border-radius:var(--radius-md);border:1px solid var(--glass-border)}.stream-mode-tab{display:flex;align-items:center;justify-content:center;gap:7px;flex:1;padding:11px 12px;border:1px solid transparent;border-radius:calc(var(--radius-md) - 3px);background:transparent;color:var(--text-muted);font-family:var(--font-family-body);font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,color .15s,border-color .15s,box-shadow .15s;-moz-appearance:none;appearance:none;-webkit-appearance:none;outline:none}.stream-mode-tab:hover:not(.active){color:var(--text-primary);background:#ffffff0a}.stream-mode-tab:focus-visible{border-color:var(--glass-border-focus);box-shadow:0 0 0 3px var(--accent-purple-glow)}.stream-mode-tab.active{background:linear-gradient(135deg,var(--accent) 0%,#7c3aed 100%);color:#fff;border-color:#ffffff1f;box-shadow:0 4px 14px #8b5cf659}.stream-mode-badge{font-size:10px;font-weight:600;letter-spacing:.02em;padding:2px 6px;border-radius:999px;background:#ffffff2e;color:#fffffff2}.stream-mode-tab:not(.active) .stream-mode-badge{background:var(--accent-soft);color:var(--accent-hover)}.stream-settings-modal{max-width:520px;max-height:min(90vh,720px);overflow-y:auto}.stream-settings-modal .modal-title{margin-bottom:6px}.stream-settings-modal .modal-desc{margin-bottom:22px}.field-label{color:var(--text-secondary);font-size:13px;font-weight:500;letter-spacing:0;text-transform:none}.stream-source-group{margin-bottom:18px}.stream-url-input{font-family:SF Mono,Fira Code,ui-monospace,monospace;font-size:13px}.stream-setup-guide{margin-bottom:20px;padding:16px;border-radius:var(--radius-md);background:#8b5cf60f;border:1px solid rgba(139,92,246,.18)}.stream-setup-guide-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px;flex-wrap:wrap}.stream-setup-guide-header strong{font-size:14px;color:var(--text-primary)}.stream-setup-tag{font-size:11px;color:var(--accent-hover);background:var(--accent-soft);padding:3px 8px;border-radius:999px}.stream-setup-steps{margin:0 0 14px 18px;padding:0;display:flex;flex-direction:column;gap:10px;color:var(--text-secondary);font-size:13px;line-height:1.5}.stream-setup-steps strong{color:var(--text-primary);font-weight:600}.stream-setup-code{display:block;margin-top:6px;padding:8px 10px;border-radius:var(--radius-sm);background:#00000059;border:1px solid var(--glass-border);font-family:SF Mono,Fira Code,ui-monospace,monospace;font-size:12px;color:var(--accent-cyan);word-break:break-all}.stream-setup-obs{display:flex;flex-direction:column;gap:4px;margin-top:6px;padding:8px 10px;border-radius:var(--radius-sm);background:#00000040;border:1px solid var(--glass-border);font-size:12px}.stream-setup-obs code{color:var(--accent-cyan);font-family:SF Mono,Fira Code,ui-monospace,monospace}.stream-example-url{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 12px;border-radius:var(--radius-sm);background:#0000004d;border:1px solid var(--glass-border)}.stream-example-label{font-size:11px;color:var(--text-muted);flex-shrink:0}.stream-example-url code{flex:1;font-size:12px;font-family:SF Mono,Fira Code,ui-monospace,monospace;color:var(--text-primary);word-break:break-all}.stream-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 10px;border:1px solid var(--glass-border);border-radius:var(--radius-sm);background:#ffffff0f;color:var(--text-secondary);font-size:12px;cursor:pointer;transition:background .15s,color .15s}.stream-copy-btn:hover{background:#ffffff1a;color:var(--text-primary)}.input-hint code{font-family:SF Mono,Fira Code,ui-monospace,monospace;font-size:11px;color:var(--accent-cyan);background:#00000040;padding:1px 5px;border-radius:4px}.stream-auto-card{margin-bottom:18px;padding:16px;border-radius:var(--radius-md);background:#4ade800f;border:1px solid rgba(74,222,128,.2)}.stream-auto-card-header{display:flex;align-items:center;gap:8px;margin-bottom:8px;color:var(--accent-green)}.stream-auto-card-header strong{font-size:14px;color:var(--text-primary)}.stream-auto-desc{font-size:13px;color:var(--text-secondary);line-height:1.5;margin-bottom:12px}.stream-auto-status{display:flex;align-items:flex-start;gap:8px;font-size:12px;color:var(--text-muted);line-height:1.45;word-break:break-all}.stream-auto-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;margin-top:4px}.stream-auto-dot.online{background:var(--accent-green);box-shadow:0 0 8px #4ade8080}.stream-auto-dot.offline{background:var(--accent-red)}.stream-manual-toggle{margin-top:12px;padding:0;border:none;background:none;color:var(--accent-hover);font-size:12px;cursor:pointer;text-decoration:underline;text-underline-offset:2px}.studio-live-btn.loading{opacity:.85;cursor:wait}.spin-icon{animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.voice-stage-audio-sink{position:absolute;width:0;height:0;overflow:hidden;pointer-events:none}.voice-stage-banner{position:absolute;top:16px;left:50%;transform:translate(-50%);z-index:60;display:flex;align-items:center;gap:10px;padding:10px 18px;border-radius:999px;font-size:13px;font-weight:500;box-shadow:0 10px 28px #00000073;border:1px solid var(--glass-border);background:#0e0b1af0;pointer-events:auto}.voice-stage-banner.live{background:linear-gradient(135deg,#300e18f7,#160a10f7);border-color:#f43f5e6b;color:#fecdd3;box-shadow:0 10px 28px #00000073,0 0 0 1px #f43f5e14 inset}.voice-stage-banner.listening{background:linear-gradient(135deg,#0c2016f7,#0a120ef7);border-color:#4ade8059;color:#bbf7d0}.voice-engine-tag{font-size:10px;padding:2px 7px;border-radius:999px;background:#ffffff1f;color:#ffffffd9}.voice-banner-mic-btn{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.2);background:#00000040;color:inherit;font-size:12px;cursor:pointer}.voice-pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-live);box-shadow:0 0 #f43f5e99;animation:voice-pulse 1.5s infinite;flex-shrink:0}@keyframes voice-pulse{0%{box-shadow:0 0 #f43f5e8c}70%{box-shadow:0 0 0 8px #f43f5e00}to{box-shadow:0 0 #f43f5e00}}.hand-raise-dock{position:absolute;left:16px;bottom:16px;z-index:40;width:min(300px,calc(100% - 32px));border-radius:var(--radius-lg);background:#0e0b1af0;border:1px solid rgba(139,92,246,.35);box-shadow:0 12px 36px #00000080;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);overflow:hidden}.hand-raise-dock.pulse{animation:hand-dock-pulse .6s ease 2}@keyframes hand-dock-pulse{0%,to{box-shadow:0 12px 36px #00000080;border-color:#8b5cf659}50%{box-shadow:0 0 0 3px #8b5cf673,0 12px 36px #00000080;border-color:#a78bfab3}}.hand-raise-dock-header{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 14px;border:none;background:#8b5cf61f;color:var(--text-primary);cursor:pointer;font-family:var(--font-family-body)}.hand-raise-dock-title{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600}.hand-raise-count{min-width:22px;height:22px;padding:0 7px;border-radius:999px;background:var(--accent-live);color:#fff;font-size:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.hand-raise-dock-body{border-top:1px solid var(--glass-border)}.hand-raise-live-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;background:#f43f5e1a;border-bottom:1px solid rgba(244,63,94,.2);font-size:12px}.hand-raise-live-info{display:flex;align-items:center;gap:6px;color:#fecdd3}.hand-raise-disconnect{display:inline-flex;align-items:center;gap:4px;padding:5px 9px;border-radius:var(--radius-sm);border:1px solid rgba(244,63,94,.35);background:transparent;color:#fda4af;font-size:11px;cursor:pointer}.hand-raise-scroll{max-height:260px;overflow-y:auto;padding:6px}.hand-raise-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 6px;border-radius:var(--radius-sm)}.hand-raise-row:hover{background:#ffffff0a}.hand-raise-student{display:flex;align-items:center;gap:8px;min-width:0}.hand-raise-avatar .user-avatar-fallback{background:var(--accent-soft);color:var(--accent-hover)}.hand-raise-name{font-size:13px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.hand-raise-connect{display:inline-flex;align-items:center;gap:4px;padding:6px 10px;border-radius:var(--radius-sm);border:none;background:linear-gradient(135deg,var(--accent) 0%,#7c3aed 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var(--glass-border);font-size:12px;color:var(--text-muted);line-height:1.45}.participant-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}.participant-remove-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);border:1px solid rgba(244,63,94,.35);background:#f43f5e1a;color:#fda4af;cursor:pointer}.participant-remove-btn:hover{background:#f43f5e33;color:#fecdd3}.hand-raise-row-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}.hand-raise-remove{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:var(--radius-sm);border:1px solid rgba(244,63,94,.35);background:#f43f5e1f;color:#fda4af;cursor:pointer}.hand-raise-remove:hover{background:#f43f5e38}.people-hand-hint{display:flex;align-items:center;gap:8px;margin-bottom:10px;padding:8px 10px;border-radius:var(--radius-sm);background:#8b5cf61a;border:1px solid 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