:root {
    --ink: #0d0d0f;
    --paper: #fbfbfa;
    --muted: #6b6b73;
    --line: #e3e3e0;
    --accent: #1f5f4b;
    --accent-ink: #ffffff;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --ink: #ececee;
      --paper: #111113;
      --muted: #97979f;
      --line: #2a2a2e;
      --accent: #4fa98a;
      --accent-ink: #08120f;
    }
  }
  * { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; }
  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 400 17px/1.65 ui-sans-serif, -apple-system, "SF Pro Text", Inter, system-ui, sans-serif;
    letter-spacing: -0.005em;
  }
  .wrap { max-width: 660px; margin: 0 auto; padding: 0 24px; }
  header { padding: 56px 0 0; }
  .mark {
    font: 600 15px/1 ui-rounded, -apple-system, system-ui, sans-serif;
    letter-spacing: -0.01em;
  }
  .mark span { color: var(--muted); font-weight: 400; margin-left: 8px; }
  h1 {
    font-size: clamp(30px, 5.6vw, 42px);
    line-height: 1.12;
    letter-spacing: -0.028em;
    font-weight: 600;
    margin: 40px 0 0;
  }
  .lede { font-size: 18px; color: var(--muted); margin: 18px 0 0; }
  h2 {
    font-size: 19px; font-weight: 600; letter-spacing: -0.015em;
    margin: 56px 0 14px;
  }
  p { margin: 14px 0; }
  a { color: inherit; }
  .cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 32px 0 0; }
  .button {
    display: inline-block; background: var(--accent); color: var(--accent-ink);
    text-decoration: none; font-size: 15px; font-weight: 550;
    padding: 12px 20px; border-radius: 8px;
  }
  .button.secondary {
    background: transparent; color: var(--ink);
    border: 1px solid var(--line); font-weight: 450;
  }
  .price { font-size: 14px; color: var(--muted); }
  .note { font-size: 14px; color: var(--muted); }
  .rule { border: 0; border-top: 1px solid var(--line); margin: 56px 0 0; }
  .steps { margin: 22px 0 0; padding: 0; list-style: none; counter-reset: step; }
  .steps li {
    counter-increment: step; position: relative;
    padding: 0 0 0 34px; margin: 0 0 16px;
  }
  .steps li::before {
    content: counter(step); position: absolute; left: 0; top: 1px;
    width: 21px; height: 21px; border-radius: 50%;
    background: var(--line); color: var(--ink);
    font-size: 11px; font-weight: 600;
    display: grid; place-items: center;
  }
  table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 18px 0 0; }
  th, td { text-align: left; padding: 9px 10px 9px 0; border-bottom: 1px solid var(--line); }
  th { font-weight: 550; color: var(--muted); font-size: 13px; }
  td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
  .scroll { overflow-x: auto; }
  .quote {
    border-left: 2px solid var(--line); padding: 2px 0 2px 16px;
    margin: 18px 0; color: var(--muted); font-size: 15px;
  }
  .quote cite { display: block; font-style: normal; font-size: 13px; margin-top: 6px; opacity: 0.8; }
  footer { padding: 48px 0 64px; font-size: 14px; color: var(--muted); }
  .plain { font-size: 15px; }
  .plain strong { font-weight: 600; }