:root{--color-primary: #6366f1;--color-primary-hover: #4f46e5;--color-secondary: #64748b;--color-secondary-hover: #475569;--color-danger: #ef4444;--color-danger-hover: #dc2626;--color-success: #22c55e;--color-bg: #0f172a;--color-surface: #1e293b;--color-surface-hover: #334155;--color-text: #f8fafc;--color-text-muted: #94a3b8;--color-border: #334155;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -2px rgba(0, 0, 0, .2);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3), 0 4px 6px -4px rgba(0, 0, 0, .2);--transition: .15s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased}#app{min-height:100%;display:flex;flex-direction:column}.screen{display:none;flex:1;padding:24px}.screen.active{display:flex;flex-direction:column;align-items:center;justify-content:center}.container{width:100%;max-width:420px;display:flex;flex-direction:column;align-items:center;gap:24px}.logo{font-size:3rem;font-weight:700;background:linear-gradient(135deg,var(--color-primary),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em}.tagline{color:var(--color-text-muted);font-size:1.1rem;margin-top:-16px}.card{width:100%;background:var(--color-surface);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-size:1rem;font-weight:500;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition);text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn-secondary{background:var(--color-secondary);color:#fff}.btn-secondary:hover:not(:disabled){background:var(--color-secondary-hover)}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover:not(:disabled){background:var(--color-danger-hover)}.btn-large{width:100%;padding:16px 24px;font-size:1.1rem}.btn-icon{font-size:1.5rem;font-weight:300;line-height:1}.btn-icon-only{width:40px;height:40px;padding:8px;background:var(--color-surface-hover);border:none;border-radius:var(--radius-sm);color:var(--color-text);cursor:pointer;transition:all var(--transition)}.btn-icon-only:hover{background:var(--color-primary)}.input-group{display:flex;gap:12px}.input-group input{flex:1;padding:12px 16px;font-size:1rem;background:var(--color-bg);border:2px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);transition:border-color var(--transition)}.input-group input:focus{outline:none;border-color:var(--color-primary)}.input-group input::placeholder{color:var(--color-text-muted)}.divider{width:100%;display:flex;align-items:center;gap:16px;color:var(--color-text-muted);font-size:.9rem}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--color-border)}.error-message{width:100%;padding:12px 16px;background:#ef44441a;border:1px solid var(--color-danger);border-radius:var(--radius-md);color:var(--color-danger);text-align:center}.room-info{text-align:center}.room-info p{color:var(--color-text-muted);margin-bottom:12px}.room-id-box{display:inline-flex;align-items:center;gap:12px;padding:12px 16px;background:var(--color-surface);border-radius:var(--radius-md)}.room-id-box span{font-family:SF Mono,Monaco,Inconsolata,monospace;font-size:1.1rem;font-weight:500;color:var(--color-primary);letter-spacing:.02em}.video-preview{width:100%;max-width:320px;aspect-ratio:4/3;position:relative;border-radius:var(--radius-lg);overflow:hidden;background:var(--color-surface);box-shadow:var(--shadow)}.video-preview video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.video-label{position:absolute;bottom:12px;left:50%;transform:translate(-50%);padding:6px 12px;background:#0009;border-radius:var(--radius-full);font-size:.85rem;color:#fff}.status-message{padding:12px 20px;background:var(--color-surface);border-radius:var(--radius-full);color:var(--color-text-muted);font-size:.95rem}#call-screen.active{padding:0}.call-container{width:100%;height:100%;display:flex;flex-direction:column;background:#000}.videos{flex:1;position:relative;display:flex;align-items:center;justify-content:center}#remote-video{width:100%;height:100%;object-fit:cover;background:#000}.video-placeholder{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:var(--color-surface);color:var(--color-text-muted)}.video-placeholder.hidden{display:none}.placeholder-icon{opacity:.5}.local-video-wrapper{position:absolute;right:20px;bottom:20px;width:160px;aspect-ratio:4/3;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-lg);border:3px solid var(--color-bg)}.local-video-wrapper video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1);background:var(--color-surface)}.call-controls{display:flex;align-items:center;justify-content:center;gap:16px;padding:24px;background:var(--color-bg)}.btn-control{width:56px;height:56px;border-radius:var(--radius-full);background:var(--color-surface);border:none;color:var(--color-text);cursor:pointer;transition:all var(--transition);display:flex;align-items:center;justify-content:center}.btn-control:hover{background:var(--color-surface-hover);transform:scale(1.05)}.btn-control.active,.btn-control.btn-close{background:var(--color-danger)}.btn-control.btn-close:hover{background:var(--color-danger-hover)}.btn-control svg{width:24px;height:24px}.call-status{position:absolute;top:20px;left:50%;transform:translate(-50%);padding:10px 20px;border-radius:var(--radius-full);font-size:.9rem;font-weight:500;z-index:10}.call-status.info{background:var(--color-surface);color:var(--color-text)}.call-status.error{background:var(--color-danger);color:#fff}.hidden{display:none!important}@media (max-width: 480px){.container{padding:16px}.logo{font-size:2.5rem}.card{padding:20px}.input-group{flex-direction:column}.input-group .btn{width:100%}.local-video-wrapper{width:120px;right:12px;bottom:12px}.call-controls{gap:12px;padding:16px}.btn-control{width:48px;height:48px}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.status-message{animation:pulse 2s ease-in-out infinite}