:root {
  --bg: #0f1216; --card: #181d24; --line: #2a323c; --fg: #e7ecf2; --dim: #8b97a6;
  --live: #35c46a; --off: #e0a92e; --blocked: #e0483d; --nodev: #8b6fd6; --left: #566172;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); }
h1 { font-size: 1.25rem; margin: 0 0 .75rem; }
button { font: inherit; padding: .55rem 1rem; border: 0; border-radius: 8px; background: #3b82f6; color: #fff; cursor: pointer; }
button:disabled { background: #384250; color: var(--dim); cursor: not-allowed; }
input { font: inherit; padding: .55rem .7rem; border: 1px solid var(--line); border-radius: 8px; background: #0c0f13; color: var(--fg); width: 100%; }
a { color: #6fa8ff; }
.good { color: var(--live); } .bad { color: var(--blocked); }
.tiny { font-size: .8rem; color: var(--dim); }

/* --- join --- */
.join { display: grid; place-items: center; min-height: 100vh; padding: 1rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 1.5rem; width: min(420px, 100%); }
.card form { display: flex; gap: .5rem; margin: .75rem 0; }
.card form button { white-space: nowrap; }
.who { color: var(--dim); }
.preview-wrap { position: relative; margin: 1rem 0; aspect-ratio: 4/3; background: #000; border-radius: 10px; overflow: hidden; }
#preview { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.badge { position: absolute; top: .5rem; left: .5rem; padding: .2rem .6rem; border-radius: 999px; font-size: .8rem; background: #000a; }
.badge.ok { background: var(--live); color: #04140a; }
.badge.bad { background: var(--blocked); }
.fix { margin: .5rem 0; padding-left: 1.1rem; line-height: 1.6; }
.devices { display: grid; gap: .55rem; margin: .75rem 0; text-align: left; }
.devices label { display: flex; align-items: center; gap: .5rem; min-width: 0; font-size: .85rem; color: var(--dim); }
.devices select { flex: 1 1 auto; min-width: 0; max-width: 100%; font: inherit; padding: .4rem .5rem; border: 1px solid var(--line); border-radius: 8px; background: #0c0f13; color: var(--fg); }
.devices .ghost { background: #2a323c; white-space: nowrap; }
.devices .ghost.playing { background: var(--live); color: #04140a; }
.meter { height: 8px; border-radius: 999px; background: #0c0f13; overflow: hidden; border: 1px solid var(--line); }
.meter-fill { height: 100%; width: 0; background: var(--live); transition: width .06s linear; }

/* --- dashboard --- */
.dash { padding: 1.25rem; }
.dash header { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.legend { color: var(--dim); font-size: .85rem; display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; }
.conn { margin-left: auto; font-size: .8rem; color: var(--dim); }
.conn.live { color: var(--live); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--line); }
th { color: var(--dim); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.email { color: var(--dim); font-size: .9rem; }
.ts { font-variant-numeric: tabular-nums; color: var(--dim); }
tr.gone { opacity: .5; }
.warn { color: var(--off); }
.receipt { color: var(--blocked); font-weight: 600; font-size: .85rem; }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 50%; background: var(--left); vertical-align: middle; }
.dot.LIVE { background: var(--live); } .dot.CAMERA_OFF { background: var(--off); }
.dot.BLOCKED { background: var(--blocked); } .dot.NO_DEVICE { background: var(--nodev); }
.dot.JOINED { background: var(--dim); } .dot.LEFT { background: var(--left); }

/* --- breakout room: fill the viewport, never scroll the page (cap, don't scroll) --- */
.room { height: 100dvh; display: flex; flex-direction: column; padding: 1rem; overflow: hidden; }
.room header { flex: 0 0 auto; display: flex; align-items: center; gap: 1rem; margin-bottom: .75rem; flex-wrap: wrap; }
.controls { margin-left: auto; display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.controls button { background: #2a323c; }
.controls button.off { background: var(--blocked); }
.controls select { font: inherit; max-width: 11rem; padding: .5rem .5rem; border: 1px solid var(--line); border-radius: 8px; background: #0c0f13; color: var(--fg); }
.controls select[hidden] { display: none; }
.controls .leave { color: var(--blocked); text-decoration: none; padding: .55rem .8rem; }
/* grid fills the leftover height; rows share it equally so tiles always fit */
.grid { flex: 1 1 auto; min-height: 0; display: grid; gap: .6rem;
        grid-template-columns: 1fr; grid-auto-rows: minmax(0, 1fr); } /* columns set deterministically by layoutGrid() */
.tile { position: relative; min-height: 0; background: #000; border-radius: 10px; overflow: hidden; }
.tile video { width: 100%; height: 100%; object-fit: cover; }
.tile.self video { transform: scaleX(-1); }                 /* mirror your own view */
.tile.speaking { box-shadow: inset 0 0 0 3px var(--live); } /* glow for whoever's talking */
.tile .name { position: absolute; bottom: .4rem; left: .4rem; padding: .15rem .5rem; border-radius: 6px; background: #000a; font-size: .8rem; }