:root {
  --bg: #0f0d0a;
  --paper: #17130e;
  --gold: #f5c542;
  --gold-2: #d9a21b;
  --ink: #f7f1e4;
  --mute: #b9ae98;
  --line: rgba(245, 197, 66, 0.22);
  --danger: #e35d3a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body, #app { min-height: 100%; }
body {
  font-family: "Noto Sans SC", sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(245, 197, 66, 0.16), transparent 55%),
    radial-gradient(900px 500px at -10% 110%, rgba(227, 93, 58, 0.12), transparent 50%),
    var(--bg);
  color: var(--ink);
}

.hidden { display: none !important; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 7vw 0;
}
.brand { display: flex; gap: 12px; align-items: center; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  color: #1a140b; font-weight: 900; display: grid; place-items: center;
}
.brand strong { display: block; font-size: 18px; letter-spacing: 0.08em; }
.brand span { color: var(--mute); font-size: 12px; }
.status-pill {
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--gold);
  font-size: 12px;
}

.stage { padding: 56px 7vw 80px; max-width: 1200px; }
.kicker {
  color: var(--gold);
  letter-spacing: 0.28em;
  font-size: 12px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 72px);
  line-height: 1.08;
  font-weight: 900;
}
.lead { margin-top: 18px; max-width: 560px; color: var(--mute); font-size: 18px; }

.cards {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}
.card {
  background: rgba(23, 19, 14, 0.86);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 28px;
  min-height: 280px;
}
.card-label { color: var(--gold); font-size: 12px; letter-spacing: 0.16em; }
.card h2 { margin: 10px 0 12px; font-size: 28px; }
.card p { color: var(--mute); line-height: 1.7; margin-bottom: 28px; }

.btn {
  border: 0; cursor: pointer; border-radius: 999px;
  padding: 12px 22px; font-size: 15px; font-weight: 700;
  font-family: inherit;
}
.btn.primary { background: var(--gold); color: #1a140b; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.text { background: transparent; color: var(--mute); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.join-row { display: flex; gap: 10px; }
.join-row input {
  flex: 1; height: 48px; border-radius: 14px; border: 1px solid var(--line);
  background: #100e0b; color: var(--ink); padding: 0 14px;
  letter-spacing: 0.28em; text-transform: uppercase; font-family: "JetBrains Mono", monospace;
  font-size: 18px;
}

.panel { padding: 24px 7vw 60px; }
.panel-grid { display: grid; grid-template-columns: 1.5fr 0.9fr; gap: 24px; }
.preview-wrap {
  position: relative; min-height: 62vh; border-radius: 24px; overflow: hidden;
  background: #090806; border: 1px solid var(--line);
}
.preview-wrap video { width: 100%; height: 100%; object-fit: contain; background: #090806; }
.preview-mask {
  position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--mute); background: rgba(9,8,6,0.55);
}
.side {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: 24px; padding: 24px;
}
.code-block span { color: var(--mute); font-size: 12px; }
.code-block strong {
  display: block; font-size: 42px; letter-spacing: 0.18em;
  font-family: "JetBrains Mono", monospace; margin: 6px 0 16px;
}
.qr { width: 180px; height: 180px; border-radius: 16px; background: var(--gold); }
.hint { color: var(--mute); margin: 16px 0; line-height: 1.6; }
.meta { list-style: none; color: var(--mute); display: grid; gap: 8px; margin-bottom: 22px; }
.meta b { color: var(--ink); margin-left: 8px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }

.viewer { position: relative; min-height: calc(100vh - 72px); background: #000; }
.viewer video { width: 100%; height: calc(100vh - 72px); object-fit: contain; background: #000; }
.viewer-overlay {
  position: absolute; inset: 0; display: grid; place-items: center; text-align: center;
  background: radial-gradient(circle at center, rgba(20,16,10,0.7), rgba(0,0,0,0.86));
}
.fs-btn, .leave-btn {
  position: absolute; top: 18px; border: 0; border-radius: 999px;
  padding: 8px 14px; cursor: pointer; font-family: inherit;
}
.fs-btn { right: 18px; background: var(--gold); color: #1a140b; font-weight: 700; }
.leave-btn { left: 18px; background: rgba(255,255,255,0.12); color: #fff; }

@media (max-width: 900px) {
  .cards, .panel-grid { grid-template-columns: 1fr; }
  .preview-wrap { min-height: 42vh; }
}