:root {
  --ink: #07121f;
  --muted: #4f6273;
  --line: #07121f1f;
  --cream: #f4f1ea;
  --warm: #eae8e2;
  --surface: #eae8e2;
  --accent: #3d6ea8;
  --accent-ink: #2d5480;
  --mark: #b4552f;
  --code-bg: #eae8e2;
  --max: 52rem;
  --nav-gap: 1.25rem;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Manrope', 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.55;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--mark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--ink);
}

code,
pre {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 0.875em;
}

code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 0.25rem;
}

pre {
  overflow: auto;
  padding: 0.9rem 1rem;
  background: var(--ink);
  color: var(--cream);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--cream) 95%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.85rem 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem var(--nav-gap);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  margin-right: 0.5rem;
  text-decoration: none;
  color: var(--ink);
}

.brand img {
  display: block;
  height: 3rem;
  width: auto;
}

.brand:hover {
  color: var(--ink);
  opacity: 0.92;
}

@media (min-width: 64rem) {
  .brand img {
    height: 3.5rem;
  }
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  font-size: 0.95rem;
}

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

.site-nav a:hover {
  color: var(--ink);
}

.site-nav a[aria-current='page'] {
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--accent);
}

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.75rem 4rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mark);
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

h2 {
  margin: 2rem 0 0.65rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.05rem;
}

.lede {
  margin: 0 0 1.5rem;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 40rem;
}

.callout {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  background: var(--warm);
  border-left: 3px solid var(--mark);
  border-radius: 0 0.35rem 0.35rem 0;
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  margin: 1.75rem 0;
}

.card {
  display: block;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  text-decoration: none;
  color: inherit;
  background: var(--cream);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--warm);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--ink) 6%, transparent);
  color: inherit;
}

.card h2,
.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  color: var(--mark);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.page-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  margin: 0 0 2rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

.page-toc a {
  text-decoration: none;
  color: var(--muted);
}

.page-toc a:hover {
  color: var(--mark);
}

.doc-section {
  margin-top: 2.5rem;
  padding-top: 0.5rem;
  scroll-margin-top: 4.5rem;
}

.doc-section > h2 {
  margin-top: 0;
}

.toc {
  margin: 1.25rem 0 2rem;
  padding: 0;
  list-style: none;
}

.toc li {
  margin: 0.35rem 0;
}

.toc a {
  text-decoration: none;
}

.event-list article {
  margin: 1.5rem 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.event-list h2 {
  margin-top: 0;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 1.75rem;
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
}

.ref-shell header {
  border-bottom: 1px solid var(--line);
}

@media (max-width: 640px) {
  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}