:root {
  --bg: #f7f3ec;
  --panel: #fffdf9;
  --panel-strong: #f0e7d8;
  --text: #241b11;
  --text-muted: #65584a;
  --border: #dbcab5;
  --accent: #8c4b1f;
  --accent-soft: rgba(140, 75, 31, 0.12);
  --shadow: 0 18px 50px rgba(36, 27, 17, 0.08);
  --code-bg: #2d251d;
  --code-text: #f8f0e7;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(140, 75, 31, 0.08), transparent 24rem),
    linear-gradient(180deg, #fbf8f3 0%, var(--bg) 100%);
  font:
    16px/1.65 "Instrument Sans",
    "Inter",
    "Segoe UI",
    sans-serif;
}

a {
  color: var(--accent);
}

code,
pre,
kbd {
  font-family: "JetBrains Mono", "SFMono-Regular", monospace;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(219, 202, 181, 0.8);
  backdrop-filter: blur(14px);
  background: rgba(251, 248, 243, 0.84);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: min(1380px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 0.9rem 0;
}

.brand {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.site-header__links {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-left: auto;
}

.site-header__links a,
.nav-toggle {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  color: var(--text);
  background: rgba(255, 253, 249, 0.88);
  text-decoration: none;
  font: inherit;
}

.nav-toggle {
  display: none;
  cursor: pointer;
}

.site-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 220px;
  gap: 2rem;
  width: min(1380px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.sidebar,
.toc {
  position: sticky;
  top: 5.4rem;
  align-self: start;
}

.sidebar-card,
.toc-card {
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1rem;
  background: rgba(255, 253, 249, 0.92);
  box-shadow: var(--shadow);
}

.sidebar-card + .sidebar-section,
.sidebar-section + .sidebar-section,
.sidebar-section + .sidebar-card,
.toc-card {
  margin-top: 1rem;
}

.sidebar-kicker {
  margin: 0 0 0.35rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
}

.sidebar-card h1,
.sidebar-section h2 {
  margin: 0;
  line-height: 1.2;
}

.sidebar-card h1 {
  font-size: 1.25rem;
}

.sidebar-card p {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
}

.sidebar-section {
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0.9rem;
  background: rgba(255, 253, 249, 0.88);
}

.sidebar-section h2 {
  margin-bottom: 0.7rem;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

.sidebar-nav {
  display: grid;
  gap: 0.3rem;
}

.sidebar-link,
.sidebar-api-link,
.toc-link {
  display: block;
  border-radius: 14px;
  padding: 0.45rem 0.6rem;
  color: var(--text-muted);
  text-decoration: none;
}

.sidebar-link:hover,
.sidebar-link:focus-visible,
.sidebar-api-link:hover,
.sidebar-api-link:focus-visible,
.toc-link:hover,
.toc-link:focus-visible {
  color: var(--text);
  background: var(--accent-soft);
}

.sidebar-link.current {
  color: var(--text);
  background: var(--accent-soft);
  font-weight: 700;
}

.content {
  min-width: 0;
}

.prose {
  border: 1px solid var(--border);
  border-radius: 32px;
  padding: clamp(1.2rem, 2vw, 2.5rem);
  background: rgba(255, 253, 249, 0.94);
  box-shadow: var(--shadow);
}

.prose > :first-child {
  margin-top: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.prose h1 {
  font-size: clamp(2.25rem, 4vw, 3.6rem);
  margin-bottom: 1rem;
}

.prose h2 {
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  margin-top: 2.8rem;
}

.prose h3 {
  font-size: 1.15rem;
  margin-top: 2rem;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
}

.prose pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: 18px;
  background: var(--code-bg);
  color: var(--code-text);
}

.prose :not(pre) > code {
  border-radius: 8px;
  padding: 0.16rem 0.38rem;
  background: rgba(45, 37, 29, 0.08);
  font-size: 0.92em;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid var(--border);
}

.prose th,
.prose td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--panel-strong);
}

.toc-card {
  display: grid;
  gap: 0.3rem;
}

.toc-link {
  font-size: 0.95rem;
}

.toc-level-3 {
  margin-left: 0.8rem;
  font-size: 0.9rem;
}

.toc-empty {
  margin: 0;
  color: var(--text-muted);
}

.page-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.page-nav__link,
.page-nav__spacer {
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 1rem;
  background: rgba(255, 253, 249, 0.94);
  box-shadow: var(--shadow);
}

.page-nav__link {
  color: var(--text);
  text-decoration: none;
}

.page-nav__link--next {
  text-align: right;
}

.page-nav__eyebrow {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 1120px) {
  .site-shell {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .toc {
    display: none;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-shell {
    grid-template-columns: 1fr;
  }

  .sidebar,
  .toc {
    position: static;
  }

  .sidebar {
    display: none;
  }

  body[data-nav-open="true"] .sidebar {
    display: block;
  }

  .site-header__links {
    gap: 0.55rem;
  }

  .site-header__links a {
    display: none;
  }

  .page-nav {
    grid-template-columns: 1fr;
  }
}