:root {
    --bg: #ffffff; --fg: #1a1c1e; --muted: #5a5e66; --card: #f2f4f6;
    --accent: #006a6a; --accent-fg: #ffffff; --border: #dde1e5;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #101415; --fg: #e2e6e8; --muted: #9aa3a8; --card: #1a2022;
      --accent: #4cdada; --accent-fg: #003737; --border: #2a3235;
    }
  }
  * { box-sizing: border-box; margin: 0; }
  body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg); color: var(--fg); line-height: 1.6;
  }
  a { color: var(--accent); }
  header {
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
    max-width: 960px; margin: 0 auto; padding: 20px 16px;
  }
  header .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; }
  header img { width: 32px; height: 32px; border-radius: 8px; }
  nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: .95rem; }
  nav a:first-child { margin-left: 0; }
  nav a:hover { color: var(--accent); }
  main { max-width: 960px; margin: 0 auto; padding: 0 16px 60px; }
  .hero { text-align: center; padding: 40px 0 24px; }
  .hero h1 { font-size: clamp(1.7rem, 5vw, 2.3rem); line-height: 1.2; margin-bottom: 16px; }
  .hero h1 span { color: var(--accent); }
  .hero p { font-size: 1.1rem; color: var(--muted); max-width: 620px; margin: 0 auto 28px; }
  .buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
  .btn {
    display: inline-block; padding: 12px 22px; border-radius: 12px; font-weight: 600;
    text-decoration: none; border: 1px solid var(--border); color: var(--fg);
  }
  .btn.primary { background: var(--accent); color: var(--accent-fg); border-color: transparent; }
  .note { color: var(--muted); font-size: .9rem; margin-top: 14px; }
  .shots { display: flex; gap: 14px; overflow-x: auto; padding: 24px 2px; margin: 8px 0 24px; scroll-snap-type: x mandatory; }
  .shots img { height: 420px; max-height: 70vh; border-radius: 16px; border: 1px solid var(--border); scroll-snap-align: center; }
  h2 { font-size: 1.4rem; margin: 40px 0 18px; text-align: center; }
  .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
  .card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
  .card h3 { font-size: 1.02rem; margin-bottom: 6px; }
  .card p { color: var(--muted); font-size: .95rem; }
  ol.steps { max-width: 640px; margin: 0 auto; padding-left: 1.4em; }
  ol.steps li { margin-bottom: 10px; }
  ol.steps li span { color: var(--muted); }
  .callout {
    text-align: center; background: var(--card); border: 1px solid var(--border);
    border-radius: 14px; padding: 28px 20px; margin-top: 40px;
  }
  .callout p { color: var(--muted); max-width: 640px; margin: 8px auto 0; }
  footer {
    border-top: 1px solid var(--border); text-align: center; color: var(--muted);
    font-size: .9rem; padding: 24px 16px; margin-top: 20px;
  }
  footer a { color: var(--muted); }
  nav a[aria-current] { color: var(--fg); font-weight: 600; }
  .doc { max-width: 720px; margin: 0 auto; }
  .doc h1 { font-size: clamp(1.6rem, 5vw, 2rem); line-height: 1.25; margin: 24px 0 12px; }
  .doc .lead { color: var(--muted); font-size: 1.08rem; margin-bottom: 8px; }
  .doc h2 { text-align: left; font-size: 1.25rem; margin: 36px 0 10px; }
  .doc h3 { font-size: 1.05rem; margin: 22px 0 6px; }
  .doc p, .doc li { margin-bottom: 8px; }
  .doc ul, .doc ol { padding-left: 1.4em; }
  .doc code, .doc pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--card); border: 1px solid var(--border); border-radius: 6px; }
  .doc code { padding: 1px 5px; }
  .doc pre { padding: 12px 14px; overflow-x: auto; margin: 8px 0 14px; }
  .doc pre code { border: 0; padding: 0; background: none; }
  .doc .tip { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 10px; padding: 12px 16px; margin: 14px 0; }
  .doc .toc { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin: 18px 0; }
  .doc .toc ul { margin: 6px 0 0; }
  .doc details { border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; margin: 10px 0; }
  .doc summary { font-weight: 600; cursor: pointer; }
  .doc details[open] summary { margin-bottom: 8px; }
  .next { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 36px; }
  header .brand { color: var(--fg); text-decoration: none; }
  .compare { overflow-x: auto; }
  .compare table { width: 100%; border-collapse: collapse; min-width: 520px; }
  .compare th, .compare td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; font-size: .95rem; }
  .compare thead th { font-size: .9rem; color: var(--muted); }
  .compare thead th:last-child, .compare td:last-child { background: var(--card); }
  .compare thead th:last-child { color: var(--accent); }
  .compare tbody th { color: var(--muted); font-weight: 600; width: 22%; }