:root {
  --bg: #f3efe7;
  --panel: rgba(255, 252, 246, 0.88);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --ink: #18211f;
  --muted: #596662;
  --line: rgba(24, 33, 31, 0.12);
  --accent: #0f766e;
  --accent-soft: #d4efe9;
  --shadow: 0 24px 60px rgba(24, 33, 31, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.1), transparent 28%),
    linear-gradient(180deg, #fbf8f2 0%, var(--bg) 100%);
}

a {
  color: inherit;
}

code,
pre,
.eyebrow,
.subtle-label,
.site-nav a {
  font-family: "IBM Plex Mono", monospace;
}

.site-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 56px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-bottom: 16px;
}

.brand {
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-nav a {
  text-decoration: none;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.86rem;
  color: var(--muted);
}

.site-nav a.is-active,
.site-nav a:hover {
  color: var(--ink);
  border-color: rgba(15, 118, 110, 0.28);
}

.hero,
.doc-panel,
.card-grid article,
.doc-grid article {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px;
}

.eyebrow,
.subtle-label {
  margin: 0 0 12px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.03em;
}

h1 {
  max-width: 11ch;
  font-size: clamp(2.6rem, 6vw, 4.9rem);
  line-height: 0.94;
}

.hero p:last-child,
.doc-panel p,
.doc-panel li,
.doc-grid p,
.card-grid p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-summary {
  max-width: 68ch;
  margin-top: 16px;
  font-size: 1.04rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hero-meta span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.56);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}

.main-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 22px;
  margin-top: 24px;
}

.sidebar {
  position: sticky;
  top: 20px;
  align-self: start;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.content {
  display: grid;
  gap: 20px;
}

.doc-panel {
  padding: 24px;
}

.doc-panel h2 {
  font-size: 1.8rem;
}

.card-grid,
.doc-grid {
  display: grid;
  gap: 16px;
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.doc-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card-grid article,
.doc-grid article {
  padding: 18px;
}

.card-grid h3,
.doc-grid h3 {
  margin-bottom: 10px;
  font-size: 1.08rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  text-decoration: none;
}

.button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, #0f766e, #16a394);
  color: #f5fffd;
}

.mermaid {
  margin-top: 18px;
  padding: 14px;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

pre {
  overflow-x: auto;
  padding: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  line-height: 1.6;
}

.site-footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 960px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .card-grid,
  .doc-grid {
    grid-template-columns: 1fr;
  }
}