/* ─────────────────────────────────────────────────────────
   Kanch — shared design system (subpages: terms/privacy/support)
   Keep tokens in sync with index.html
   ───────────────────────────────────────────────────────── */

/* Tokens come from design-system/colors_and_type.css, linked directly in
   each page's <head> before this file. Below, the old subpage token names
   are kept as aliases mapping to the DS tokens, so the existing terms /
   privacy / support markup inherits the paper canvas, glass-teal accent
   and Geist / Instrument Serif type without being rewritten. */
:root {
  --serif: var(--font-display);
  --sans:  var(--font-sans);
  --mono:  var(--font-mono);

  --bg:        var(--bg-canvas);
  --bg-2:      var(--paper-100);
  --bg-3:      var(--paper-0);
  --ink:       var(--ink-800);
  --ink-2:     var(--ink-500);
  --muted:     var(--ink-400);
  --rule:      var(--border-default);
  --rule-2:    var(--border-subtle);
  --accent:    var(--brand);
  --accent-2:  var(--saffron-500);
  --on-accent: var(--fg-on-brand);
  --danger:    var(--danger-500);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 32px; }
@media (max-width: 640px) { .wrap { padding: 0 20px; } }

::selection { background: var(--accent); color: var(--on-accent); }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }

/* ───── Typography primitives ───── */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.mono { font-family: var(--mono); }

/* ───── Nav ───── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule-2);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.02em;
  color: var(--ink-900);
  text-transform: lowercase;
  text-decoration: none;
}
.brand:hover { color: var(--ink-900); }
.brand-mark {
  width: 24px; height: 24px;
  background: url('../design-system/assets/logo-mark.svg') center / contain no-repeat;
  align-self: center;
  flex: 0 0 auto;
}
.nav-links {
  display: flex; gap: 28px; list-style: none;
  font-size: 14px;
}
.nav-links a {
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
.nav-back {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 9px 15px;
  background: var(--brand);
  color: var(--fg-on-brand);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid var(--brand);
  transition: background 0.2s;
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
.nav-back:hover { background: var(--brand-hover); color: var(--fg-on-brand); }
@media (max-width: 720px) { .nav-links { display: none; } }

/* ───── Page header band ───── */
.page-header {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}
.page-header-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
}
@media (max-width: 700px) {
  .page-header-inner { grid-template-columns: 1fr; }
  .page-header { padding: 56px 0 40px; }
}
.page-header h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(48px, 7vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.page-header h1 em { font-style: italic; color: var(--accent); }
.page-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.6;
  text-align: right;
}
@media (max-width: 700px) { .page-meta { text-align: left; } }
.page-meta strong { color: var(--accent); font-weight: 500; }
.page-eyebrow {
  margin-bottom: 24px;
  display: inline-flex; align-items: center; gap: 12px;
}
.page-eyebrow::before {
  content: ""; width: 24px; height: 1px; background: var(--ink-2);
}

/* ───── Two-column doc layout ───── */
.doc {
  padding: 64px 0 96px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 900px) {
  .doc { grid-template-columns: 1fr; gap: 40px; padding: 48px 0 72px; }
}

.toc {
  position: sticky;
  top: 88px;
  align-self: start;
  border-top: 1px solid var(--rule);
  padding-top: 20px;
}
.toc h3 {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.toc ol { list-style: none; counter-reset: toc-counter; }
.toc li {
  counter-increment: toc-counter;
  padding: 6px 0;
  border-bottom: 1px solid var(--rule-2);
}
.toc li:last-child { border-bottom: none; }
.toc li::before {
  content: counter(toc-counter, decimal-leading-zero);
  display: inline-block;
  width: 32px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.toc a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  transition: color 0.2s;
}
.toc a:hover { color: var(--accent); }
@media (max-width: 900px) {
  .toc { position: static; }
}

/* ───── Article ───── */
.article { max-width: 720px; }
.article section { margin-bottom: 56px; }
.article section:last-child { margin-bottom: 0; }
.article h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 3.5vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 8px;
}
.article h2 em { font-style: italic; color: var(--accent); }
.article .sec-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}
.article h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.005em;
  color: var(--ink);
  margin: 28px 0 12px;
}
.article p {
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.65;
  margin-bottom: 14px;
}
.article ul, .article ol {
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.65;
  margin: 0 0 16px 0;
  padding-left: 0;
  list-style: none;
}
.article li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 6px;
}
.article ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.7em;
  width: 8px; height: 1px;
  background: var(--accent);
}
.article ol { counter-reset: ol-counter; }
.article ol li { counter-increment: ol-counter; }
.article ol li::before {
  content: counter(ol-counter, decimal-leading-zero);
  position: absolute;
  left: 0; top: 0;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.article li strong { color: var(--ink); font-weight: 600; }
.article p strong { color: var(--ink); font-weight: 600; }

/* Callouts */
.note {
  border-left: 2px solid var(--accent);
  background: var(--bg-2);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 14.5px;
  line-height: 1.55;
}
.note-mono {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
  display: block;
}
.note.warn { border-left-color: var(--danger); }
.note.warn .note-mono { color: var(--danger); }

/* Data table — used in privacy */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 14px 12px;
  border-bottom: 1px solid var(--rule-2);
  vertical-align: top;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table th {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.data-table td:first-child { color: var(--ink); font-weight: 500; }
.data-table td { color: var(--ink-2); }

/* Contact block at end */
.contact-block {
  margin-top: 64px;
  border-top: 1px solid var(--rule);
  padding-top: 40px;
}
.contact-block .eyebrow { margin-bottom: 8px; }
.contact-block h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 32px;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--ink);
}
.contact-block p { color: var(--ink-2); margin-bottom: 14px; }

/* ───── Footer ───── */
footer {
  background: var(--bg);
  padding: 56px 0 32px;
  border-top: 1px solid var(--rule);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--rule-2);
}
@media (max-width: 720px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
.footer-brand-block .brand { font-size: 28px; margin-bottom: 16px; display: inline-flex; }
.footer-brand-block p {
  color: var(--muted);
  font-size: 14px;
  max-width: 280px;
  line-height: 1.5;
}
.footer-col h5 {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 18px;
  font-weight: 500;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom span:nth-child(2) { color: var(--glass-300); }

/* ───── Dark footer — matches the marketing site ───── */
footer { background: var(--ink-900); border-top: none; }
.footer-brand-block .brand,
footer .brand { color: #fff; }
.footer-brand-block p { color: var(--ink-300); }
.footer-top { border-bottom-color: var(--ink-700); }
.footer-col h5 { color: var(--ink-400); }
.footer-col a { color: var(--ink-200); }
.footer-col a:hover { color: #fff; }
.footer-bottom { color: var(--ink-400); }
