:root {
  --bg: #f3f5f8; --card: #fff; --text: #1b2330; --muted: #5d6878;
  --accent: #1463ff; --accent-h: #0d4fd6; --danger: #d93636; --border: #d8dee8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #12161d; --card: #1b212b; --text: #e6ebf2; --muted: #98a3b3; --border: #2c3542; }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, "Segoe UI", sans-serif; }
[hidden] { display: none !important; }

#home { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 28px; width: min(400px, 100%); }
h1 { margin: 0; font-size: 22px; }
.sub { margin: 2px 0 20px; color: var(--muted); }
label { display: block; margin-bottom: 14px; font-size: 13px; color: var(--muted); }
input:not([type=checkbox]) { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font-size: 16px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text); }
#peerId { font-size: 20px; letter-spacing: 2px; font-variant-numeric: tabular-nums; }
button { cursor: pointer; border: 0; border-radius: 8px; padding: 10px 16px; font: inherit; font-weight: 600; background: var(--accent); color: #fff; }
button:hover { background: var(--accent-h); }
button:disabled { opacity: .6; cursor: default; }
button.danger { background: var(--danger); }
#connectBtn { width: 100%; padding: 12px; }
.status { min-height: 1.4em; margin: 14px 0 0; color: var(--muted); }
.status.err { color: var(--danger); }

#session { position: fixed; inset: 0; display: flex; flex-direction: column; background: #000; }
#toolbar { display: flex; align-items: center; gap: 10px; padding: 6px 10px; background: #1b212b; color: #e6ebf2; font-size: 13px; }
#toolbar button { padding: 6px 12px; font-size: 13px; }
.spacer { flex: 1; }
.chk { margin: 0; color: inherit; display: flex; gap: 6px; align-items: center; font-size: 13px; }
#stage { position: relative; flex: 1; min-height: 0; outline: none; background: #000; }
#stage:fullscreen { cursor: default; }
#screen { width: 100%; height: 100%; object-fit: contain; display: block; }
#overlay { position: absolute; inset: 0; display: grid; place-items: center; color: #ccd; font-size: 16px; pointer-events: none; }