:root {
  --bg: #0f1216;
  --card: #171b22;
  --line: #262c36;
  --fg: #e8ebf0;
  --muted: #9aa4b2;
  --accent: #ff4081;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 40px 20px 80px; }
h1 { font-size: 30px; margin: 0 0 6px; }
h2 { font-size: 16px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 36px 0 14px; }
.sub { color: var(--muted); max-width: 60ch; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.tile {
  text-align: left; background: var(--card); border: 1px solid var(--line); color: var(--fg);
  border-radius: 14px; padding: 16px; cursor: pointer; display: flex; flex-direction: column; gap: 4px;
  transition: transform .08s, border-color .08s;
}
.tile:hover { transform: translateY(-2px); border-color: var(--accent); }
.tile .name { font-size: 18px; font-weight: 700; }
.tile .note { font-size: 12px; color: var(--muted); }
.join { display: flex; gap: 10px; }
.join input { flex: 1; }
input, button { font: inherit; }
input[type=text] {
  background: #0c0f13; border: 1px solid var(--line); color: var(--fg);
  border-radius: 10px; padding: 10px 12px;
}
button {
  background: var(--accent); color: #fff; border: 0; border-radius: 10px;
  padding: 10px 16px; cursor: pointer; font-weight: 600;
}
button:hover { filter: brightness(1.08); }
.share { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.linkrow { display: flex; gap: 10px; }
.linkrow input { flex: 1; }
.hint { color: var(--muted); font-size: 13px; }
.hidden { display: none; }
.beta { font-size: 11px; background: #3a2f13; color: #f7cd4c; padding: 2px 8px; border-radius: 20px; vertical-align: middle; letter-spacing: .04em; }
.notes { margin-top: 40px; color: var(--muted); font-size: 14px; }
.notes summary { cursor: pointer; color: var(--fg); }
.notes code { background: #0c0f13; padding: 1px 6px; border-radius: 6px; }