:root {
  --bg: #0f1420;
  --panel: #182033;
  --panel-2: #212b42;
  --line: #2e3a56;
  --text: #eef2fb;
  --muted: #93a0bd;
  --accent: #ff7a1a;
  --accent-2: #ffb347;
  --win: #3ddc97;
  --danger: #ff5d73;
  --radius: 14px;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); min-height: 100vh; }
button, input, textarea { font: inherit; color: inherit; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.center { text-align: center; }
.error { color: var(--danger); min-height: 1.2em; margin: 0 0 8px; }

/* visibility by role */
body:not(.is-host) .host-only { display: none !important; }
body.is-host .guest-only { display: none !important; }

/* ---------- basic controls ---------- */
button { cursor: pointer; border: 1px solid var(--line); background: var(--panel-2); border-radius: 10px; padding: 10px 16px; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: 0; color: #1b1205; font-weight: 700; }
button.big { padding: 14px 26px; font-size: 1.1rem; }
button.ghost { background: transparent; }
button.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent); }
input, textarea { width: 100%; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
textarea { resize: vertical; line-height: 1.4; }
.row { display: flex; gap: 10px; align-items: center; margin-top: 12px; }
.row.between { justify-content: space-between; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.card h2 { margin-top: 0; }
.pill { background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; font-size: .85rem; }

/* ---------- landing ---------- */
.landing { max-width: 460px; margin: 0 auto; padding: 48px 16px; }
.landing h1, .logo { font-weight: 900; letter-spacing: -.02em; }
.landing h1 { font-size: 2.6rem; margin: 0 0 6px; }
h1 span, .logo span { color: var(--accent); }
.tagline { color: var(--muted); margin-bottom: 28px; }
.landing .big { width: 100%; }
.landing #code { text-transform: uppercase; letter-spacing: .3em; font-weight: 700; text-align: center; }

/* ---------- room ---------- */
.topbar { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--panel); position: sticky; top: 0; z-index: 5; }
.logo { color: var(--text); text-decoration: none; font-size: 1.25rem; }
.roominfo { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.roominfo strong { letter-spacing: .2em; color: var(--accent-2); }
.roominfo button { padding: 4px 10px; font-size: .85rem; }
.room { max-width: 1920px; margin: 0 auto; padding: 16px; }
#setup { max-width: 640px; margin-inline: auto; }
#stage { max-width: 820px; margin: 0 auto 8px; }
.controls { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 20px; }
.round-label { text-transform: uppercase; letter-spacing: .15em; font-size: .8rem; color: var(--accent-2); text-align: center; margin-bottom: 14px; }

/* live match */
.versus { display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: stretch; }
.vs { align-self: center; font-weight: 900; color: var(--muted); }
.choice { min-height: 140px; border-radius: var(--radius); border: 2px solid var(--line); background: var(--panel-2); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 16px; transition: transform .08s, border-color .15s, background .15s; }
.choice:hover { border-color: var(--accent); }
.choice:active { transform: scale(.98); }
.choice .name { font-size: clamp(1.2rem, 3.5vw, 2rem); font-weight: 800; word-break: break-word; }
.choice .check { visibility: hidden; font-size: .85rem; color: var(--win); font-weight: 700; }
.choice.selected { border-color: var(--win); background: color-mix(in srgb, var(--win) 14%, var(--panel-2)); }
.choice.selected .check { visibility: visible; }
.timer { height: 10px; border-radius: 99px; background: var(--bg); overflow: hidden; margin: 18px 0 8px; }
.timer .bar { height: 100%; width: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .1s linear; }
.timer .bar.urgent { background: var(--danger); }
#seconds { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--text); }

/* result / champion */
.result, .champion { text-align: center; }
.winner { font-size: clamp(1.8rem, 6vw, 3rem); font-weight: 900; color: var(--win); word-break: break-word; }
.score { color: var(--muted); margin-top: 6px; }
.tie { margin-top: 10px; color: var(--accent-2); }
.champion { border-color: var(--accent); background: radial-gradient(circle at top, color-mix(in srgb, var(--accent) 22%, var(--panel)), var(--panel) 70%); }
.trophy { font-size: 3.5rem; }

/* ---------- bracket ---------- */
#bracketWrap { overflow-x: auto; padding-bottom: 8px; }
.bracket { display: flex; gap: 18px; min-width: min-content; }
.round { display: flex; flex-direction: column; width: 200px; flex: 0 0 200px; }
.round-title { text-align: center; font-size: .75rem; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin-bottom: 8px; }
.matches { display: flex; flex-direction: column; justify-content: space-around; flex: 1; gap: 8px; }
.match { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; font-size: .88rem; position: relative; }
.match.bye { opacity: .6; }
.match.is-live { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 40%, transparent); }
.match.is-last { border-color: var(--win); }
.slot { display: flex; justify-content: space-between; gap: 8px; padding: 6px 10px; }
.slot + .slot { border-top: 1px solid var(--line); }
.slot .n { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slot .c { font-variant-numeric: tabular-nums; color: var(--muted); }
.slot.empty { color: var(--muted); font-style: italic; }
.slot.won { color: var(--win); font-weight: 700; }
.slot.won .c { color: var(--win); }
.slot.lost { color: var(--muted); text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--muted) 50%, transparent); }
.tag { font-size: .68rem; padding: 2px 10px 4px; color: var(--muted); }
.live-tag { color: var(--accent); font-weight: 700; }

/* split (March Madness) layout: left half → final ← right half */
.bracket.split { width: 100%; gap: 8px; }
.bracket.split .round { flex: 1 1 0; width: auto; min-width: 116px; }
.bracket.split .slot { padding: 6px 8px; }
.bracket.split .match { font-size: .82rem; }
.bracket.split .round.right .slot { flex-direction: row-reverse; text-align: right; }
.bracket.split .round.right .tag { text-align: right; }
.bracket.split .round.final { flex-grow: 1.25; }
.bracket.split .round.final .matches { justify-content: center; }
.bracket.split .round.final .round-title { color: var(--accent-2); }
.bracket.split .round.final .match { font-size: .95rem; border-color: var(--accent); }
.bracket.split .round.final .slot { padding: 10px 12px; }

@media (max-width: 560px) {
  .versus { grid-template-columns: 1fr; }
  .vs { justify-self: center; }
  .choice { min-height: 100px; }
}

.tooltip { position: fixed; z-index: 20; pointer-events: none; background: var(--text); color: var(--bg); font-size: .85rem; font-weight: 600; padding: 5px 9px; border-radius: 6px; box-shadow: 0 4px 14px rgb(0 0 0 / .4); white-space: nowrap; }