:root {
  color-scheme: light;
  --bg: #f3f6f4;
  --bg-accent: #e7efe9;
  --surface: #ffffff;
  --ink: #15241f;
  --muted: #5b6b64;
  --line: #d5dfd8;
  --brand: #0f5c4c;
  --brand-soft: #d9ebe4;
  --warning: #7a3b1d;
  --warning-bg: #fff4ec;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(21, 36, 31, 0.06);
  --font-sans: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 92, 76, 0.08), transparent 36%),
    linear-gradient(180deg, var(--bg) 0%, #eef3f0 100%);
  line-height: 1.6;
}

a {
  color: var(--brand);
  text-underline-offset: 0.18em;
}

a:hover {
  color: #0a4338;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--surface);
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

.shell {
  width: min(920px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header,
.site-footer {
  border-bottom: 1px solid transparent;
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(243, 246, 244, 0.88);
  border-bottom-color: var(--line);
  z-index: 5;
}

.header-row,
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  font-size: 0.92rem;
}

.header-nav a {
  text-decoration: none;
  color: var(--muted);
}

.header-nav a:hover,
.header-nav a[aria-current="page"] {
  color: var(--brand);
}

.hero {
  padding: 2.4rem 0 1.4rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--brand);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.doc .prose > h1:first-child {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.55rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.lede {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.notice {
  margin: 1rem 0 1.5rem;
  padding: 0.9rem 1rem;
  border: 1px solid #f0d2bc;
  border-radius: 12px;
  background: var(--warning-bg);
  color: var(--warning);
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem;
  padding-bottom: 3rem;
}

.doc-card {
  display: block;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 160ms ease, border-color 160ms ease;
}

.doc-card:hover {
  transform: translateY(-2px);
  border-color: #b9cdc4;
}

.doc-card h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.3;
}

.doc-card p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.doc {
  padding: 1.8rem 0 3rem;
}

.prose {
  padding: 1.4rem 1.35rem 1.6rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-serif);
  line-height: 1.25;
  letter-spacing: -0.02em;
  scroll-margin-top: 5rem;
}

.prose h1 {
  margin-top: 0;
  font-size: 1.9rem;
}

.prose h2 {
  margin-top: 1.8rem;
  font-size: 1.35rem;
}

.prose h3 {
  margin-top: 1.35rem;
  font-size: 1.12rem;
}

.prose h4 {
  margin-top: 1.1rem;
  font-size: 1rem;
}

.prose p,
.prose li {
  color: #24332e;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.6rem 0;
}

.prose blockquote {
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--brand);
  background: var(--brand-soft);
  border-radius: 0 12px 12px 0;
}

.prose blockquote p {
  margin: 0;
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-accent);
  padding: 0.1em 0.35em;
  border-radius: 6px;
}

.prose pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 12px;
  background: #12201c;
  color: #e8f2ed;
}

.prose pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--bg-accent);
  font-weight: 700;
}

.prose tr:last-child td {
  border-bottom: 0;
}

.doc-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  margin-top: 1.4rem;
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.5);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 720px) {
  .header-row,
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .prose {
    padding: 1.1rem 1rem 1.25rem;
  }
}