/* ============================================================================
   AI for Excel — legal & support pages design system
   Self-contained. Shared by privacy.html, terms.html, security.html,
   contact.html. Matches the green-grid look of index.html.
   Brand line: show users "AI for Excel"; operator/brand is "GetSheet AI".
   ============================================================================ */

:root {
  color-scheme: light;
  --green: #3a6b52;
  --green-strong: #2b5540;
  --green-soft: #eef4f0;
  --ink: #1b2a22;
  --muted: #5c6b63;
  --faint: #8a978f;
  --line: #e2e8e4;
  --bg: #f7f9f7;
  --card: #ffffff;
  --amber: #c8891f;
  --radius: 14px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: Consolas, ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--green-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--green-soft) 1px, transparent 1px);
  background-size: 26px 26px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ── Header ─────────────────────────────────────────────────────────────── */
header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(247, 249, 247, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 17px; }
.brand .mk {
  width: 26px; height: 26px; border-radius: 7px; background: var(--green);
  color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 800;
}
.nav .sp { flex: 1; }
.nav a.link { color: var(--muted); font-size: 14px; font-weight: 600; }
.nav a.link:hover { color: var(--green); }
.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 18px;
  border-radius: 10px; font-weight: 600; font-size: 14px; cursor: pointer; transition: .15s;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-strong); }

/* ── Document ───────────────────────────────────────────────────────────── */
.doc { max-width: 820px; margin: 0 auto; padding: 44px 22px 60px; }
.doc-head { margin-bottom: 34px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.doc-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--green);
  background: var(--green-soft); padding: 5px 12px; border-radius: 99px; margin-bottom: 14px;
}
.doc-head h1 { font-size: 32px; letter-spacing: -.4px; line-height: 1.2; margin-bottom: 10px; }
.doc-head .meta { color: var(--muted); font-size: 13.5px; }

.doc .toc {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 34px;
}
.doc .toc strong { display: block; font-size: 13px; color: var(--muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: .04em; }
.doc .toc ol { margin: 0; padding-left: 20px; columns: 2; gap: 24px; }
.doc .toc li { margin-bottom: 6px; font-size: 14px; }
.doc .toc a { color: var(--green-strong); }
.doc .toc a:hover { color: var(--green); text-decoration: underline; }

.doc section { margin-bottom: 32px; scroll-margin-top: 76px; }
.doc h2 {
  font-size: 21px; letter-spacing: -.2px; margin-bottom: 12px; padding-top: 6px;
  display: flex; align-items: baseline; gap: 10px;
}
.doc h2 .num { color: var(--green); font-size: 15px; font-weight: 800; }
.doc h3 { font-size: 16px; margin: 18px 0 8px; }
.doc p { margin-bottom: 12px; color: #33413a; }
.doc ul, .doc ol.list { margin: 0 0 14px; padding-left: 22px; }
.doc li { margin-bottom: 7px; color: #33413a; }
.doc a.inline { color: var(--green); font-weight: 600; }
.doc a.inline:hover { text-decoration: underline; }
.doc strong { color: var(--ink); }

.callout {
  background: var(--green-soft); border: 1px solid #d5e5db; border-left: 3px solid var(--green);
  border-radius: 6px 12px 12px 6px; padding: 14px 18px; margin: 8px 0 18px; font-size: 14px;
}
.callout strong { color: var(--green-strong); }

.tbl { width: 100%; border-collapse: collapse; margin: 4px 0 18px; font-size: 13.5px; }
.tbl th, .tbl td { text-align: left; padding: 10px 12px; border: 1px solid var(--line); vertical-align: top; }
.tbl th { background: var(--green-soft); color: var(--green-strong); font-weight: 700; }
.tbl td { background: #fff; color: #33413a; }

.contact-card {
  display: grid; gap: 14px; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; margin: 6px 0 20px;
}
.contact-card .row { display: flex; align-items: center; gap: 12px; font-size: 15px; }
.contact-card .row .ic {
  width: 38px; height: 38px; border-radius: 10px; background: var(--green-soft);
  color: var(--green); display: grid; place-items: center; flex-shrink: 0; font-size: 17px;
}
.contact-card .row a { color: var(--green-strong); font-weight: 600; }
.contact-card .row span.lbl { display: block; font-size: 12px; color: var(--muted); }

/* ── Multi-column footer (matches reference layout) ─────────────────────── */
.site-foot { border-top: 1px solid var(--line); background: rgba(255, 255, 255, 0.5); margin-top: 30px; }
.foot-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 28px;
  max-width: 1080px; margin: 0 auto; padding: 42px 22px 26px;
}
.foot-brand .brand { margin-bottom: 12px; }
.foot-brand p { color: var(--muted); font-size: 13.5px; max-width: 260px; }
.foot-brand .endorse { margin-top: 12px; font-size: 12.5px; color: var(--faint); }
.foot-col h4 { font-size: 14px; margin-bottom: 12px; color: var(--ink); }
.foot-col a { display: block; color: var(--muted); font-size: 13.5px; margin-bottom: 9px; }
.foot-col a:hover { color: var(--green); }
.foot-col .line { display: flex; align-items: flex-start; gap: 8px; color: var(--muted); font-size: 13.5px; margin-bottom: 9px; }
.foot-col .line .ic { color: var(--green); flex-shrink: 0; }
.foot-bottom {
  border-top: 1px solid var(--line); max-width: 1080px; margin: 0 auto;
  padding: 16px 22px; color: var(--faint); font-size: 12.5px;
  display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
}
.foot-bottom .sp { flex: 1; }

@media (max-width: 820px) {
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .doc .toc ol { columns: 1; }
}
@media (max-width: 520px) {
  .foot-grid { grid-template-columns: 1fr; }
  .doc-head h1 { font-size: 26px; }
}