:root {
  color-scheme: dark;
  --bg: #101827;
  --panel: rgba(22, 34, 52, 0.86);
  --panel-strong: rgba(31, 48, 72, 0.94);
  --text: #f6f8fb;
  --muted: #aab8ca;
  --line: rgba(255,255,255,0.12);
  --accent: #62d6c4;
  --accent-2: #8fb9ff;
  --danger: #ff8b8b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(98,214,196,0.25), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(143,185,255,0.18), transparent 32rem),
    var(--bg);
  color: var(--text);
}
button, input { font: inherit; }
.shell { width: min(1180px, calc(100vw - 32px)); margin: 0 auto; padding: 32px 0; }
.hero, .card, .chatHead, .composer { border: 1px solid var(--line); }
.hero {
  display: flex; justify-content: space-between; gap: 20px; align-items: center;
  padding: 28px; border-radius: 28px; background: rgba(16,24,39,0.7); backdrop-filter: blur(16px);
  box-shadow: 0 24px 70px rgba(0,0,0,0.28);
}
.eyebrow { margin: 0 0 6px; text-transform: uppercase; letter-spacing: .16em; font-size: 12px; color: var(--accent); font-weight: 800; }
h1, h2 { margin: 0; line-height: 1; }
h1 { font-size: clamp(42px, 8vw, 86px); letter-spacing: -0.07em; }
h2 { font-size: 22px; }
.subtitle { color: var(--muted); max-width: 580px; margin-bottom: 0; }
.status { padding: 10px 14px; border-radius: 999px; background: var(--panel-strong); color: var(--muted); white-space: nowrap; }
.status.good { color: var(--accent); }
.status.bad { color: var(--danger); }
.grid { display: grid; grid-template-columns: 340px 1fr; gap: 20px; margin-top: 20px; }
.card { border-radius: 24px; background: var(--panel); backdrop-filter: blur(16px); box-shadow: 0 18px 45px rgba(0,0,0,0.22); }
.controls { padding: 22px; display: flex; flex-direction: column; gap: 14px; }
label { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
input { width: 100%; border: 1px solid var(--line); background: rgba(255,255,255,0.06); color: var(--text); border-radius: 15px; padding: 13px 14px; outline: none; }
input:focus { border-color: rgba(98,214,196,0.75); box-shadow: 0 0 0 4px rgba(98,214,196,0.12); }
button { border: 0; border-radius: 15px; padding: 13px 16px; background: #263a56; color: var(--text); cursor: pointer; font-weight: 800; }
button:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.08); }
button:disabled { opacity: 0.48; cursor: not-allowed; }
.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #07111f; }
.ghost { background: transparent; border: 1px solid var(--line); color: var(--muted); }
.divider { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .14em; }
.divider:before, .divider:after { content: ""; height: 1px; flex: 1; background: var(--line); }
.chat { min-height: 640px; display: grid; grid-template-rows: auto 1fr auto auto; overflow: hidden; }
.chatHead { margin: 14px; padding: 16px; border-radius: 18px; display: flex; justify-content: space-between; align-items: center; background: rgba(255,255,255,0.05); }
#lobbyCode { color: var(--accent); letter-spacing: .12em; }
.messages { padding: 8px 18px 18px; overflow: auto; display: flex; flex-direction: column; gap: 10px; }
.message { max-width: 74%; padding: 12px 14px; border-radius: 16px; background: rgba(255,255,255,0.07); border: 1px solid var(--line); }
.message.system { align-self: center; color: var(--muted); font-size: 13px; background: transparent; }
.message.mine { align-self: flex-end; background: rgba(98,214,196,0.16); }
.meta { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.typing { min-height: 22px; margin: 0; padding: 0 18px; color: var(--accent); font-size: 13px; }
.composer { display: grid; grid-template-columns: 1fr auto; gap: 10px; margin: 14px; padding: 10px; border-radius: 20px; background: rgba(255,255,255,0.05); }
.composer input { border-radius: 14px; }
@media (max-width: 820px) {
  .hero { align-items: flex-start; flex-direction: column; }
  .grid { grid-template-columns: 1fr; }
  .chat { min-height: 560px; }
  .message { max-width: 92%; }
}