:root {
  color-scheme: light dark;
  --bg: #f6f8f7;
  --surface: #ffffff;
  --text: #18201d;
  --muted: #53605b;
  --brand: #176b55;
  --brand-strong: #0f513f;
  --border: #d8e0dc;
  --warning-bg: #fff3cd;
  --warning-border: #d49b00;
  --warning-text: #5d4300;
  --danger-bg: #fde8e7;
  --danger-border: #c6423a;
  --danger-text: #70211c;
  --focus: #7c3aed;
  --max: 72rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101714;
    --surface: #18211d;
    --text: #edf4f0;
    --muted: #b9c6c0;
    --brand: #5bd1a8;
    --brand-strong: #8be3c3;
    --border: #35433d;
    --warning-bg: #493a08;
    --warning-border: #d9a514;
    --warning-text: #ffecad;
    --danger-bg: #4a211f;
    --danger-border: #e76a61;
    --danger-text: #ffd0cc;
    --focus: #c4b5fd;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: var(--brand-strong); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: .14em; }
a:focus-visible, button:focus-visible {
  outline: .2rem solid var(--focus);
  outline-offset: .18rem;
}
.skip-link {
  position: absolute;
  top: -10rem;
  left: 1rem;
  z-index: 100;
  padding: .75rem 1rem;
  background: var(--surface);
  color: var(--text);
  border: .15rem solid var(--focus);
  border-radius: .5rem;
}
.skip-link:focus { top: 1rem; }
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.header-inner, .page, .footer-inner {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}
.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: .65rem;
  background: var(--brand);
  color: #fff;
  font-size: .85rem;
  letter-spacing: .04em;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list a { font-weight: 650; }
.nav-list li + li,
.footer-inner li + li { margin-top: 0; }
.page { padding-block: 2.5rem 4rem; }
.hero { margin-bottom: 2rem; }
.eyebrow {
  margin: 0 0 .4rem;
  color: var(--brand-strong);
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .82rem;
}
h1, h2, h3 { line-height: 1.25; }
h1 { margin: 0 0 .75rem; font-size: clamp(2rem, 6vw, 3.4rem); }
h2 { margin-top: 2.5rem; font-size: clamp(1.45rem, 3vw, 2rem); }
h3 { margin-top: 1.7rem; font-size: 1.2rem; }
.lead { max-width: 70ch; font-size: 1.12rem; color: var(--muted); }
.meta { color: var(--muted); font-size: .95rem; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: 1rem;
  margin-block: 1.5rem;
}
.card, .summary, .callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .85rem;
  padding: 1.25rem;
}
.card h2, .card h3, .summary h2, .summary h3 { margin-top: 0; }
.card p:last-child, .summary p:last-child, .callout p:last-child { margin-bottom: 0; }
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: .8rem;
}
.summary-grid > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .7rem;
  padding: 1rem;
}
.summary-grid dt { font-weight: 800; }
.summary-grid dd { margin: .35rem 0 0; color: var(--muted); }
.draft-warning, .danger-note {
  border-left: .35rem solid;
  border-radius: .5rem;
  padding: 1rem 1.1rem;
  margin-block: 1.5rem;
}
.draft-warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--warning-text);
}
.danger-note {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger-text);
}
.button-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-block: 1.25rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: .65rem 1rem;
  border-radius: .65rem;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}
.button.secondary {
  background: transparent;
  color: var(--brand-strong);
  border: 1px solid var(--brand);
}
.table-wrap { overflow-x: auto; margin-block: 1rem; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
}
th, td { padding: .8rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: color-mix(in srgb, var(--surface) 80%, var(--brand) 20%); }
code {
  padding: .12rem .3rem;
  border-radius: .3rem;
  background: color-mix(in srgb, var(--surface) 75%, var(--border) 25%);
}
li + li { margin-top: .35rem; }
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .85rem;
  padding: 1.1rem 1.3rem;
}
.toc h2 { margin: 0 0 .6rem; font-size: 1.2rem; }
.toc ol { columns: 2; column-width: 16rem; }
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.5rem;
  color: var(--muted);
  font-size: .95rem;
}
.footer-inner ul { display: flex; flex-wrap: wrap; gap: .75rem; list-style: none; margin: 0; padding: 0; }
.placeholder {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 800;
  background: var(--warning-bg);
  color: var(--warning-text);
  border: 1px dashed var(--warning-border);
  border-radius: .25rem;
  padding: .05rem .25rem;
}
.small { font-size: .92rem; color: var(--muted); }
@media (max-width: 42rem) {
  .header-inner { align-items: flex-start; flex-direction: column; }
  .toc ol { columns: 1; }
  th, td { min-width: 12rem; }
}
@media print {
  .site-header, .site-footer, .draft-warning, .skip-link { display: none; }
  body { background: #fff; color: #000; }
  .page { width: 100%; padding: 0; }
  a { color: #000; text-decoration: none; }
}