:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #10b981;
    --secondary-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --radius: 16px;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  }
  
  body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
  }
  
  .app-container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  
  .app-header {
    text-align: center;
  }
  
  .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
  }
  
  .logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
  }
  
  .logo h1 span {
    color: var(--primary);
  }
  
  .status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.3s;
  }
  
  .status-dot.disconnected { background-color: var(--danger); }
  .status-dot.connecting { background-color: #f59e0b; }
  .status-dot.connected { background-color: var(--secondary); }
  
  #statusText {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
  }
  
  .card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  
  .room-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 20px 0;
  }
  
  .room-input-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
  }
  
  .room-input-group input {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
  }
  
  .room-input-group input:focus {
    border-color: var(--primary);
  }
  
  .button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    border-radius: 12px;
    border: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    color: white;
    transition: all 0.2s ease;
  }
  
  .btn-primary { background-color: var(--primary); }
  .btn-primary:hover { background-color: var(--primary-hover); }
  
  .btn-secondary { background-color: var(--secondary); }
  .btn-secondary:hover { background-color: var(--secondary-hover); }
  
  .btn-danger { background-color: var(--danger); }
  .btn-danger:hover { background-color: var(--danger-hover); }
  
  .btn-sm {
    padding: 8px 14px;
    font-size: 0.85rem;
    border-radius: 8px;
  }
  
  .icon {
    width: 22px;
    height: 22px;
  }
  
  .hidden {
    display: none !important;
  }
  
  /* Estilos de Vídeo */
  .video-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
  }
  
  .badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  .video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .video-element {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  .placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
  }
  
  .spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }
  
  @keyframes spin {
    to { transform: rotate(360deg); }
  }
  
  @media (max-width: 480px) {
    .button-group {
      grid-template-columns: 1fr;
    }
  }