:root {
        color-scheme: dark;
        --ink: #e9edf5;
        --muted: #93a0b8;
        --line: #1d2432;
        --bg: #06070a;
        --card: #0c0f16;
        --accent: #7cc5ff;
      }
      * { box-sizing: border-box; }
      html, body { margin: 0; background: var(--bg); color: var(--ink); }
      body {
        font: 16px/1.6 ui-sans-serif, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
        -webkit-font-smoothing: antialiased;
      }
      .wrap { max-width: 980px; margin: 0 auto; padding: 28px 22px 72px; }
      header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 40px; }
      .mark { display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: .2px; }
      .mark svg { width: 22px; height: 22px; }
      nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 14px; }
      nav a:hover { color: var(--ink); }
      h1 { font-size: clamp(30px, 5.4vw, 52px); line-height: 1.08; letter-spacing: -.02em; margin: 0 0 18px; }
      h1 em { font-style: normal; color: var(--accent); }
      .lede { font-size: clamp(16px, 2.1vw, 19px); color: var(--muted); max-width: 62ch; margin: 0 0 30px; }
      .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 54px; }
      .btn {
        display: inline-flex; align-items: center; gap: 9px; padding: 12px 18px; border-radius: 999px;
        border: 1px solid var(--line); background: var(--card); color: var(--ink);
        text-decoration: none; font-weight: 600; font-size: 15px;
      }
      .btn.primary { background: var(--ink); color: #05060a; border-color: var(--ink); }
      .btn small { font-weight: 500; color: inherit; opacity: .6; }
      .grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); margin-bottom: 54px; }
      .card { border: 1px solid var(--line); background: var(--card); border-radius: 14px; padding: 18px; }
      .card h3 { margin: 0 0 8px; font-size: 15px; letter-spacing: .01em; }
      .card p { margin: 0; color: var(--muted); font-size: 14px; }
      h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .14em; color: var(--muted); margin: 0 0 14px; font-weight: 600; }
      ol.steps { margin: 0 0 54px; padding: 0; list-style: none; counter-reset: s; }
      ol.steps li { counter-increment: s; position: relative; padding: 0 0 16px 44px; color: var(--muted); }
      ol.steps li::before {
        content: counter(s); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%;
        border: 1px solid var(--line); display: grid; place-items: center; color: var(--ink); font-size: 13px;
      }
      ol.steps strong { color: var(--ink); font-weight: 600; }
      footer { border-top: 1px solid var(--line); padding-top: 20px; color: var(--muted); font-size: 13px; display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; }
      footer a { color: var(--muted); }
      .note { font-size: 13px; color: var(--muted); }
      code { font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: #10141d; border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
      @media (prefers-reduced-motion: no-preference) {
        .card, .btn { transition: border-color .18s ease, transform .18s ease; }
        .card:hover { border-color: #2a3446; }
        .btn:hover { transform: translateY(-1px); }
      }