:root {
  --bg: #0f1115; --panel: #181b22; --panel2: #232733; --text: #e8eaf0; --muted: #8b92a5;
  --accent: #4c8dff; --ok: #2ecc71; --warn: #f5a623; --danger: #e5484d; --radius: 12px;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; }
.hidden { display: none !important; }
.muted { color: var(--muted); } .small { font-size: 13px; }
.grow { flex: 1; }
.row { display: flex; align-items: center; } .gap { gap: 10px; } .wrap { flex-wrap: wrap; } .between { justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.view.center { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.card { background: var(--panel); border-radius: 16px; padding: 28px; width: min(440px, 100%); display: flex; flex-direction: column; gap: 16px; }
.card.wide { width: min(900px, 100%); }
h1 { margin: 0; font-size: 22px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
input, select { background: var(--panel2); color: var(--text); border: 1px solid #323847; border-radius: 8px; padding: 10px 12px; font: inherit; min-width: 0; }
input:focus, select:focus { outline: 2px solid var(--accent); border-color: transparent; }
button, .btn { font: inherit; color: var(--text); background: var(--panel2); border: 0; border-radius: 8px; padding: 10px 16px; cursor: pointer; text-decoration: none; display: inline-block; text-align: center; }
button:hover:not(:disabled), .btn:hover { filter: brightness(1.2); }
button:disabled { opacity: .45; cursor: not-allowed; }
.primary { background: var(--accent); color: #fff; font-weight: 600; }
.danger { background: var(--danger); color: #fff; }
.ghost { background: transparent; border: 1px solid #323847; }
.ctl.off { background: var(--danger); color: #fff; }
.ctl.on-share { background: var(--ok); color: #04210f; }
.err { color: #ff8a8e; margin: 0; }
.chip { display: inline-block; padding: 5px 10px; border-radius: 999px; background: var(--panel2); font-size: 13px; margin: 0; }
.chip.ok { background: rgba(46,204,113,.15); color: var(--ok); } .chip.bad { background: rgba(229,72,77,.15); color: #ff8a8e; } .chip.warn { background: rgba(245,166,35,.15); color: var(--warn); }

.check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 720px) { .check-grid { grid-template-columns: 1fr; } .card { padding: 20px; } }
.preview { position: relative; aspect-ratio: 16/9; background: #000; border-radius: var(--radius); overflow: hidden; margin-bottom: 10px; }
.preview video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.pv-off { position: absolute; inset: 0; display: grid; place-items: center; background: var(--panel2); color: var(--muted); }
.meter { height: 8px; background: var(--panel2); border-radius: 4px; overflow: hidden; margin-top: 6px; }
.meter i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .08s; }

#v-room { height: 100dvh; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 10px 16px; }
.stage { flex: 1; min-height: 0; display: flex; gap: 10px; padding: 0 10px; }
.grid { flex: 1; min-width: 0; display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); grid-auto-rows: 1fr; align-content: stretch; overflow: auto; }
.grid[data-n="1"] { grid-template-columns: 1fr; }
.grid[data-n="2"], .grid[data-n="3"], .grid[data-n="4"] { grid-template-columns: repeat(2, 1fr); }
.grid[data-n="5"], .grid[data-n="6"], .grid[data-n="7"], .grid[data-n="8"], .grid[data-n="9"] { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 720px) { .grid, .grid[data-n] { grid-template-columns: 1fr 1fr; } .grid[data-n="1"] { grid-template-columns: 1fr; } }
.grid .focus-main { display: none; }
.grid .focus-strip { display: contents; }
.grid.focus { display: flex; gap: 10px; overflow: hidden; }
.grid.focus .focus-main { display: block; flex: 1; min-width: 0; }
.grid.focus .focus-main .tile { height: 100%; }
.grid.focus .focus-strip { display: flex; flex-direction: column; gap: 10px; width: 200px; flex: none; overflow-y: auto; }
.grid.focus .focus-strip .tile { height: 120px; min-height: 0; flex: none; }
.grid.focus .focus-strip .tile .avatar span { width: 44px; height: 44px; font-size: 18px; }
.grid.focus .focus-strip .tile .label { font-size: 12px; padding: 2px 6px; }
@media (max-width: 720px) {
  .grid.focus { flex-direction: column; }
  .grid.focus .focus-strip { flex-direction: row; width: auto; height: 92px; overflow-x: auto; overflow-y: hidden; }
  .grid.focus .focus-strip .tile { width: 124px; height: 92px; }
}
.tile { position: relative; background: var(--panel); border-radius: var(--radius); overflow: hidden; min-height: 120px; border: 2px solid transparent; }
.tile { cursor: pointer; }
.tile.pinned { border-color: var(--accent); }
.tile.speaking { border-color: var(--ok); }
.tile video { width: 100%; height: 100%; object-fit: cover; background: #000; }
.tile.screen video, .tile.nocam video { object-fit: contain; }
.tile.local:not(.screen) video { transform: scaleX(-1); }
.tile .avatar { position: absolute; inset: 0; display: grid; place-items: center; background: var(--panel); }
.tile .avatar span { width: 72px; height: 72px; border-radius: 50%; background: var(--accent); display: grid; place-items: center; font-size: 28px; font-weight: 700; }
.tile .label { position: absolute; inset-inline-start: 8px; bottom: 8px; background: rgba(0,0,0,.6); padding: 3px 9px; border-radius: 6px; font-size: 13px; display: flex; gap: 6px; }
.tile .actions { position: absolute; inset-inline-end: 8px; top: 8px; display: none; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.tile .actions button { padding: 4px 10px; font-size: 12px; background: rgba(0,0,0,.7); }
.tile .actions button.warn { background: var(--danger); }
.tile:hover .actions, .tile:focus-within .actions { display: flex; }
@media (hover: none) { .tile .actions { display: flex; } }
h2 { margin: 6px 0 0; font-size: 16px; }

.side { width: 320px; flex-shrink: 0; background: var(--panel); border-radius: var(--radius); padding: 14px; display: flex; flex-direction: column; gap: 10px; overflow: auto; }
@media (max-width: 720px) { .side { position: fixed; inset: auto 0 64px 0; width: auto; max-height: 55dvh; z-index: 5; box-shadow: 0 -8px 30px rgba(0,0,0,.5); } }
.files { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.files li { background: var(--panel2); border-radius: 8px; padding: 8px 10px; font-size: 13px; word-break: break-all; }
.files a { color: var(--accent); }
.bar { display: flex; justify-content: center; gap: 10px; padding: 12px; flex-wrap: wrap; }
.badge { background: var(--accent); border-radius: 999px; padding: 0 7px; font-size: 12px; margin-inline-start: 4px; }

.rooms { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.rooms li { background: var(--panel2); border-radius: 10px; padding: 12px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.rooms .info { flex: 1; min-width: 160px; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand b { font-size: 18px; letter-spacing: -.2px; }
.brand span { color: var(--muted); font-size: 13px; }
.brand small { display: block; color: var(--muted); font-size: 12px; margin-top: 1px; }

.lang { position: fixed; top: 10px; inset-inline-end: 10px; z-index: 10; padding: 6px 10px; font-size: 13px; }
body.in-room .lang { display: none; }
.topbar .lang-sel { padding: 4px 8px; font-size: 13px; }

.chat { list-style: none; margin: 0; padding: 0; flex: 1; min-height: 120px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }
.chat li { background: var(--panel2); border-radius: 8px; padding: 7px 10px; font-size: 14px; overflow-wrap: anywhere; max-width: 92%; align-self: flex-start; }
.chat li.mine { align-self: flex-end; background: #25407a; }
.chat li b { display: block; font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.chat a { color: #8fb8ff; }
#chat-form input { flex: 1; }

html, body { max-width: 100%; overflow-x: hidden; }
.card, .card > *, .check-grid > *, .stack > * { min-width: 0; max-width: 100%; }
input, select, button { max-width: 100%; }
.topbar { flex-wrap: wrap; }
@media (max-width: 720px) { .view.center { padding: 52px 12px 12px; align-items: start; } .lang { top: 8px; inset-inline-end: 8px; } .card { padding: 18px; } .bar button { padding: 9px 11px; font-size: 14px; } }