:root {
    --paper: #F3F4F7;
    --surface: #FFFFFF;
    --surface-2: #FAFBFC;
    --ink: #15171E;
    --muted: #5B6270;
    --line: #E3E5EC;
    --graphite: #2A2D36;
    --focus: #2F5BEA;
    --iq: #C0102A;
    --maxw: 1080px;
    --readw: 760px;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --paper: #0D0F14; --surface: #14171F; --surface-2: #171B24; --ink: #ECEEF3;
      --muted: #9AA2B1; --line: #262B36; --graphite: #C6CAD3; --focus: #6486FF; --iq: #E4243B;
    }
  }
  :root[data-theme="light"] {
    --paper: #F3F4F7; --surface: #FFFFFF; --surface-2: #FAFBFC; --ink: #15171E;
    --muted: #5B6270; --line: #E3E5EC; --graphite: #2A2D36; --focus: #2F5BEA; --iq: #C0102A;
  }
  :root[data-theme="dark"] {
    --paper: #0D0F14; --surface: #14171F; --surface-2: #171B24; --ink: #ECEEF3;
    --muted: #9AA2B1; --line: #262B36; --graphite: #C6CAD3; --focus: #6486FF; --iq: #E4243B;
  }

  * { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; overflow-x: clip; }
  body {
    margin: 0;
    color: var(--ink);
    background-color: var(--paper);
    background-image:
      radial-gradient(56% 40% at 3% -3%, rgba(249, 194, 60, 0.18), transparent 62%),
      radial-gradient(54% 44% at 100% 1%, rgba(91, 140, 255, 0.16), transparent 62%);
    background-repeat: no-repeat;
    background-size: 100% 900px;
    font-family: var(--sans);
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  .wrap {
    width: 100%; max-width: var(--maxw); margin: 0 auto;
    padding-left: max(28px, env(safe-area-inset-left));
    padding-right: max(28px, env(safe-area-inset-right));
  }
  a { color: inherit; }
  :focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 3px; }
  .eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
  .iqr { color: var(--iq); font-weight: 700; }

  /* ---- top bar ---- */
  header.bar {
    position: sticky; top: 0; z-index: 20;
    background: color-mix(in srgb, var(--paper) 82%, transparent);
    backdrop-filter: saturate(140%) blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .bar .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
  .mark { font-weight: 800; font-size: 30px; letter-spacing: -0.02em; text-decoration: none; }
  .mark b { font-weight: 800; }
  .mark .iq { background: #C0102A; color: #FFFFFF; padding: 1px 6px; border-radius: 6px; margin-left: 1px; }
  nav.top { display: flex; gap: 26px; }
  nav.top a { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.04em; text-decoration: none; color: var(--muted); }
  nav.top a:hover { color: var(--ink); }
  @media (max-width: 620px) { nav.top { display: none; } }

  /* ---- legal page ---- */
  .legal-hero { padding-top: clamp(34px, 6vw, 60px); padding-bottom: clamp(20px, 3vw, 30px); }
  .legal-hero .kicker { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
  .legal-hero .kicker .kickmark { width: 17px; height: 17px; display: block; }
  .legal-hero h1 { font-size: clamp(32px, 5.4vw, 52px); line-height: 1.05; letter-spacing: -0.032em; font-weight: 800; margin: 0; }
  .legal-hero .eff { margin-top: 16px; font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em; color: var(--muted); }

  article.legal {
    max-width: var(--readw);
    border-top: 1px solid var(--line);
    padding-top: clamp(26px, 4vw, 40px);
    padding-bottom: clamp(48px, 8vw, 88px);
  }
  article.legal .intro { font-size: 18px; color: var(--muted); margin: 0 0 8px; }
  article.legal h2 {
    font-size: clamp(19px, 2.4vw, 23px); font-weight: 800; letter-spacing: -0.02em;
    margin: 42px 0 12px; scroll-margin-top: 78px;
  }
  article.legal h2 .num { color: var(--muted); font-family: var(--mono); font-size: 0.68em; font-weight: 600; margin-right: 10px; letter-spacing: 0; }
  article.legal h3 { font-size: 16px; font-weight: 700; margin: 24px 0 6px; letter-spacing: -0.01em; }
  article.legal p { margin: 12px 0; }
  article.legal ul { margin: 12px 0; padding-left: 22px; }
  article.legal li { margin: 7px 0; }
  article.legal a[href^="mailto"], article.legal a[href^="http"] { color: var(--iq); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--iq) 40%, transparent); }
  article.legal a[href^="mailto"]:hover, article.legal a[href^="http"]:hover { border-bottom-color: var(--iq); }
  article.legal strong { font-weight: 700; }
  .callout {
    background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
    padding: 18px 20px; margin: 22px 0; font-size: 15px; color: var(--muted);
  }
  .callout strong { color: var(--ink); }

  footer.foot { border-top: 1px solid var(--line); padding: 26px 0 40px; }
  footer.foot .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between; }
  footer.foot .legal-links { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: 0.03em; }
  footer.foot .legal-links a { text-decoration: none; border-bottom: 1px solid transparent; }
  footer.foot .legal-links a:hover { border-bottom-color: currentColor; }
  footer.foot .copy { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 12px; color: var(--muted); }
  footer.foot .mark { font-size: 13px; font-weight: 800; }
  footer.foot .mark .iq { padding: 0 4px; border-radius: 4px; }