:root {
    --bg: #040a10;
    --bg-2: #0a1620;
    --ink: #e8f2f5;
    --ink-dim: #6f8a97;
    --sea-1: #1e88e5;
    --sea-2: #00e5c9;
    --card: rgba(255,255,255,0.04);
    --border: rgba(255,255,255,0.10);
  }

  * { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

  html, body {
    width: 100%; min-height: 100%;
    background: var(--bg);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    color: var(--ink);
  }

  body {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    padding-top: max(40px, env(safe-area-inset-top));
    padding-bottom: max(40px, env(safe-area-inset-bottom));
    position: relative;
    overflow-x: hidden;
  }

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
      radial-gradient(ellipse at 50% 0%, rgba(30,136,229,0.10), transparent 55%),
      radial-gradient(ellipse at 50% 100%, rgba(0,229,201,0.06), transparent 55%);
    pointer-events: none;
    z-index: 0;
  }

  .header { text-align: center; margin-bottom: 32px; position: relative; z-index: 1; }

  .title {
    font-family: 'Major Mono Display', monospace;
    font-size: 30px;
    letter-spacing: 0.08em;
    text-shadow: 0 0 24px rgba(30,136,229,0.35), 0 0 60px rgba(0,229,201,0.12);
    margin-bottom: 12px;
  }

  .subtitle {
    font-size: 10px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--ink-dim);
  }

  .wrap { width: 100%; max-width: 460px; position: relative; z-index: 1; display: flex; flex-direction: column; gap: 20px; }

  .card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px;
  }

  .card h2 {
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--sea-2);
    margin-bottom: 14px;
  }

  .card p.desc {
    font-size: 12px;
    line-height: 1.6;
    color: var(--ink-dim);
    margin-bottom: 16px;
  }

  .btn {
    display: block;
    width: 100%;
    margin-top: 4px;
    padding: 14px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, var(--sea-1), var(--sea-2));
    color: #041018;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-family: inherit;
    cursor: pointer;
  }

  .btn:disabled { opacity: 0.4; cursor: not-allowed; }
  .btn.secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--ink);
    margin-top: 10px;
  }

  .join-row { display: flex; gap: 10px; }
  .join-row input {
    flex: 1;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--ink);
    font-family: inherit;
    font-size: 14px;
    letter-spacing: 0.06em;
  }
  .join-row .btn { width: auto; margin-top: 0; padding: 0 18px; }

  .error {
    margin-top: 12px;
    font-size: 12px;
    color: #ff5c5c;
    display: none;
  }

  .rules {
    font-size: 12px;
    line-height: 1.7;
    color: var(--ink-dim);
  }

  .rules p { margin-bottom: 4px; }
  .rules p:last-child { margin-bottom: 0; }

  .footer {
    margin-top: 8px;
    font-size: 9px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--ink-dim);
    opacity: 0.5;
  }

  a.back { color: var(--ink-dim); text-decoration: none; font-size: 11px; letter-spacing: 0.08em; }