:root {
    --coral: #ff6b6b;
    --ocean: #4fccc4;
    --ink: #1c1c1e;
    --muted: #6b6b70;
    --bg: #faf8f5;
    --card: #ffffff;
    --line: #e8e4dd;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --ink: #f2f2f7;
      --muted: #9a9aa0;
      --bg: #131316;
      --card: #1c1c1f;
      --line: #2c2c31;
    }
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    padding: 0 20px 80px;
    background: var(--bg);
    color: var(--ink);
    font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
  }
  .wrap { max-width: 680px; margin: 0 auto; }

  header { text-align: center; padding: 72px 0 48px; }
  h1 {
    font-size: 44px;
    line-height: 1.1;
    margin: 0 0 12px;
    letter-spacing: -0.5px;
  }
  .tagline { color: var(--muted); font-size: 19px; margin: 0; }

  .grid { display: inline-grid; grid-template-columns: repeat(3, 26px); gap: 0; margin-bottom: 22px; }
  .grid span {
    width: 26px; height: 26px;
    border-right: 3px solid var(--line);
    border-bottom: 3px solid var(--line);
  }
  .grid span:nth-child(1) { border-right-color: var(--coral); border-bottom-color: var(--coral); }
  .grid span:nth-child(2) { border-bottom-color: var(--ocean); }
  .grid span:nth-child(4) { border-right-color: var(--ocean); }
  .grid span:nth-child(5) { background: color-mix(in srgb, var(--coral) 18%, transparent); }

  h2 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--muted);
    margin: 52px 0 18px;
    font-weight: 600;
  }
  h3 { font-size: 17px; margin: 26px 0 6px; }

  .card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 4px 24px 24px;
  }
  p { margin: 0 0 14px; }
  .card h3:first-of-type { margin-top: 20px; }

  a { color: var(--coral); text-decoration: none; }
  a:hover { text-decoration: underline; }

  .contact {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 24px;
    text-align: center;
  }
  .contact a { font-size: 19px; font-weight: 600; }

  .note {
    border-left: 3px solid var(--ocean);
    padding: 2px 0 2px 18px;
    margin: 18px 0;
    color: var(--muted);
  }

  footer {
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 14px;
    text-align: center;
  }
  footer a { color: var(--muted); }

  dl { margin: 0; }
  dt { font-weight: 600; margin-top: 20px; }
  dd { margin: 4px 0 0; color: var(--muted); }

  /* Sub-page chrome */
  .back {
    display: inline-block;
    margin: 40px 0 0;
    font-size: 15px;
    color: var(--muted);
  }
  .back:hover { color: var(--coral); }
  .page-title {
    font-size: 32px;
    margin: 12px 0 6px;
    letter-spacing: -0.3px;
  }
  .page-sub { color: var(--muted); margin: 0 0 8px; }
  .nav {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 26px;
    font-size: 15px;
  }

  /* App Store call to action */
  .cta { text-align: center; margin: 34px 0 8px; }
  .appstore {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--ink);
    color: var(--bg);
    padding: 14px 26px;
    border-radius: 12px;
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
  }
  .appstore:hover { text-decoration: none; opacity: 0.88; }
  .appstore svg { width: 20px; height: 20px; fill: currentColor; }
  .cta-note { color: var(--muted); font-size: 14px; margin: 12px 0 0; }