:root {
  --bg: #070b14;
  --panel: #111827;
  --panel-2: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --green: #22c55e;
  --red: #ef4444;
  --radius: 14px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); }
body.light { --bg: #f3f4f6; --panel: #ffffff; --panel-2: #e5e7eb; --text: #111827; --muted: #4b5563; }
.app { min-height: 100vh; display: flex; flex-direction: column; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; background: var(--panel); border-bottom: 1px solid rgba(255,255,255,.08); }
.brand { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 1.6rem; }
.brand strong { display: block; }
.brand small { color: var(--muted); font-size: .72rem; }
.top-actions { display: flex; gap: 10px; align-items: center; }
.plus-toggle { color: var(--muted); font-size: .85rem; }
.btn { border: 1px solid rgba(255,255,255,.12); background: var(--panel-2); color: var(--text); padding: 8px 14px; border-radius: 8px; cursor: pointer; font: inherit; }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: 0; color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger { background: #7f1d1d; border-color: #991b1b; color: #fecaca; }
.lobby { max-width: 980px; margin: 0 auto; padding: 40px 20px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin: 0; }
.hero p { color: var(--muted); max-width: 60ch; }
.lobby-card { background: var(--panel); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 20px; margin: 24px 0; display: grid; gap: 12px; }
.field { display: grid; gap: 6px; }
.field label { font-size: .78rem; color: var(--muted); }
.field input { padding: 10px 12px; border-radius: 8px; border: 1px solid rgba(255,255,255,.12); background: var(--panel-2); color: var(--text); font: inherit; }
.lobby-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.lobby-note { color: var(--muted); font-size: .8rem; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.feature-grid article { background: var(--panel); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 16px; }
.feature-grid h3 { margin: 0 0 6px; }
.feature-grid p { color: var(--muted); font-size: .85rem; margin: 0; }
.room { padding: 16px 20px; }
.room-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.room-header h2 { margin: 0; }
.room-header p { color: var(--muted); margin: 4px 0 0; font-size: .85rem; }
.room-actions { display: flex; gap: 8px; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; margin: 16px 0; }
.video-tile { background: #000; border-radius: var(--radius); overflow: hidden; position: relative; aspect-ratio: 16/9; border: 1px solid rgba(255,255,255,.08); }
.video-tile video { width: 100%; height: 100%; object-fit: cover; }
.tile-label { position: absolute; bottom: 8px; left: 8px; background: rgba(0,0,0,.6); padding: 4px 8px; border-radius: 6px; font-size: .75rem; }
.controls-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.ctrl { padding: 10px 14px; border-radius: 8px; border: 1px solid rgba(255,255,255,.12); background: var(--panel-2); color: var(--text); cursor: pointer; }
.ctrl.muted, .ctrl.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.chat-panel { background: var(--panel); border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius); padding: 12px; }
.chat-panel.hidden { display: none; }
.chat-log { height: 220px; overflow-y: auto; display: grid; gap: 6px; padding: 6px; }
.chat-row { display: grid; gap: 2px; }
.chat-row.mine .chat-name { color: var(--accent-2); }
.chat-name { font-size: .72rem; color: var(--muted); }
.chat-text { font-size: .9rem; }
.chat-form { display: flex; gap: 8px; margin-top: 8px; }
.chat-form input { flex: 1; padding: 8px 10px; border-radius: 8px; border: 1px solid rgba(255,255,255,.12); background: var(--panel-2); color: var(--text); }
.hidden { display: none; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .field-row { grid-template-columns: 1fr; } }

.room-list { display: flex; flex-wrap: wrap; gap: 8px; }
.room-chip { border: 1px solid rgba(255,255,255,.12); background: var(--panel-2); color: var(--text); padding: 6px 10px; border-radius: 8px; cursor: pointer; font: inherit; }
.room-chip span { color: var(--muted); margin-left: 6px; font-size: .75rem; }