:root {
  --bg: #1e1f22; --panel: #2b2d31; --panel2: #313338; --text: #f2f3f5; --muted: #949ba4;
  --accent: #5865f2; --green: #23a55a; --red: #f23f43; --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text);
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
[hidden] { display: none !important; }
button { cursor: pointer; font: inherit; border: 0; color: inherit; }
.muted { color: var(--muted); }
.erro { color: var(--red); margin: 0; }

/* Lobby */
.lobby { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.card { background: var(--panel); padding: 28px; border-radius: var(--radius); width: min(380px, 100%);
  display: flex; flex-direction: column; gap: 14px; }
.card h1 { margin: 0; font-size: 26px; }
.card p { margin: 0; }
.card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.card input { background: var(--bg); border: 1px solid #3f4147; border-radius: 8px; padding: 10px 12px;
  color: var(--text); font-size: 15px; }
.card input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.primary { background: var(--accent); padding: 12px; border-radius: 8px; font-weight: 600; }
.primary:hover { filter: brightness(1.1); }

.card h2 { margin: 6px 0 0; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.salas { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-height: 240px; overflow: auto; }
.salas li { display: flex; align-items: center; gap: 10px; background: var(--bg); border-radius: 8px; padding: 10px 12px; }
.salas li.vazio { background: transparent; padding: 4px 0; font-size: 13px; }
.salas .info { flex: 1; min-width: 0; }
.salas .info strong { display: block; }
.salas .info span { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.salas button.entrar { background: var(--green); padding: 8px 14px; border-radius: 6px; font-weight: 600; }
.salas button.apagar { background: transparent; padding: 6px; border-radius: 6px; opacity: .6; }
.salas button:hover { filter: brightness(1.1); opacity: 1; }
.criar { display: flex; gap: 8px; margin-top: 4px; }
.criar input { flex: 1; }
.criar .primary { padding: 10px 14px; }
#viaLink { display: flex; flex-direction: column; gap: 10px; }

/* Sala */
.room { height: 100%; display: flex; flex-direction: column; }
.topo { display: flex; align-items: center; gap: 14px; padding: 10px 16px; background: var(--panel); }
.topo .ghost { margin-left: auto; background: transparent; padding: 6px 10px; border-radius: 6px; }
.topo .ghost:hover { background: var(--panel2); }

.grid { flex: 1; display: grid; gap: 10px; padding: 10px; overflow: auto;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); align-content: center; }
.tile { position: relative; background: var(--panel); border-radius: var(--radius); aspect-ratio: 16 / 9;
  overflow: hidden; display: grid; place-items: center; outline: 3px solid transparent; transition: outline-color .12s; }
.tile.falando { outline-color: var(--green); }
.tile.tela { grid-column: 1 / -1; aspect-ratio: auto; min-height: 50vh; }
.tile video { width: 100%; height: 100%; object-fit: contain; background: #000; }
.tile.sem-video video { display: none; }
.tile .avatar { width: 84px; height: 84px; border-radius: 50%; background: var(--accent); display: grid;
  place-items: center; font-size: 34px; font-weight: 700; }
.tile:not(.sem-video) .avatar { display: none; }
.tile .nome { position: absolute; left: 10px; bottom: 10px; background: rgba(0,0,0,.6); padding: 4px 10px;
  border-radius: 6px; font-size: 13px; display: flex; gap: 6px; align-items: center; }
.tile .nome .ico { opacity: .9; }
.tile.local .nome::after { content: "(voce)"; color: var(--muted); }
.tile .expandir { position: absolute; top: 8px; right: 8px; background: rgba(0,0,0,.6); border-radius: 6px;
  padding: 4px 8px; opacity: 0; transition: opacity .15s; }
.tile:hover .expandir { opacity: 1; }
.tile.sem-video .expandir { display: none; }

.tile .vol { position: absolute; right: 10px; bottom: 10px; display: flex; align-items: center; gap: 6px;
  background: rgba(0,0,0,.6); padding: 4px 8px; border-radius: 6px; font-size: 12px; }
.tile .vol input { width: 90px; accent-color: var(--accent); }
.tile .vol b { min-width: 36px; text-align: right; font-weight: 600; }

.controles { display: flex; justify-content: center; gap: 12px; padding: 12px; background: var(--panel); }
.ctl { display: flex; flex-direction: column; align-items: center; gap: 2px; width: 84px; padding: 8px 0;
  border-radius: 10px; background: var(--panel2); font-size: 20px; }
.ctl span { font-size: 11px; color: var(--muted); }
.ctl:hover { filter: brightness(1.15); }
.ctl.on { background: var(--green); }
.ctl.on span { color: #fff; }
.ctl.sair { background: var(--red); }
.ctl.sair span { color: #fff; }

@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; align-content: start; }
  .ctl { width: 70px; }
}