*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --brand: #4f46e5;
  --brand-light: #e0e7ff;
  --text: #111827;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --bg-code: #f3f4f6;
  --nav-width: 220px;
  --content-max: 780px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* ── Layout ── */
.layout {
  display: grid;
  grid-template-columns: var(--nav-width) 1fr;
  min-height: 100vh;
}

nav {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 2rem 1.25rem;
  background: #fafafa;
}

main {
  padding: 2.5rem 3rem;
  max-width: var(--content-max);
}

/* ── Nav ── */
.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--brand);
  text-decoration: none;
  display: block;
  margin-bottom: 1.75rem;
}

nav ul {
  list-style: none;
}

nav li { margin: 0.1rem 0; }

nav a {
  display: block;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

nav a:hover, nav a.active {
  background: var(--brand-light);
  color: var(--brand);
}

.nav-section {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.6rem 0.6rem 0.2rem;
  margin-top: 1rem;
}

/* ── Content ── */
h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; }
h2 { font-size: 1.2rem; font-weight: 600; margin: 2rem 0 0.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
h3 { font-size: 1rem; font-weight: 600; margin: 1.5rem 0 0.5rem; }

p { margin-bottom: 1rem; color: #374151; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.4rem; margin-bottom: 1rem; }
li { margin: 0.3rem 0; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: "JetBrains Mono", "Fira Code", Menlo, monospace;
  font-size: 0.85em;
  background: var(--bg-code);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

pre {
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
  font-size: 0.875rem;
  line-height: 1.6;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: monospace;
  margin-right: 0.4rem;
}

.badge-get    { background: #dcfce7; color: #166534; }
.badge-post   { background: #fef9c3; color: #713f12; }
.badge-delete { background: #fee2e2; color: #991b1b; }

.callout {
  background: var(--brand-light);
  border-left: 3px solid var(--brand);
  border-radius: 0 6px 6px 0;
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.callout-warn {
  background: #fef3c7;
  border-left-color: #d97706;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.9rem;
}

th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: var(--bg-code);
  border: 1px solid var(--border);
  font-weight: 600;
}

td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

.tag { font-size: 0.75rem; background: var(--bg-code); border: 1px solid var(--border); border-radius: 4px; padding: 0.1em 0.4em; }

@media (max-width: 700px) {
  .layout { grid-template-columns: 1fr; }
  nav { display: none; }
  main { padding: 1.5rem; }
}