:root {
  --bg: #fbfcfe;
  --panel: #ffffff;
  --text: #172033;
  --muted: #5b6779;
  --border: #e4e9f1;
  --accent: #4f46e5;
  --accent-soft: #eef0fe;
  --code-bg: #0f172a;
  --code-text: #e6edf5;
  --shadow: 0 1px 2px rgba(23, 32, 51, 0.05), 0 8px 24px rgba(23, 32, 51, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --panel: #131c2e;
    --text: #e6ebf4;
    --muted: #97a3b6;
    --border: #253147;
    --accent: #818cf8;
    --accent-soft: #1d2440;
    --code-bg: #0a101f;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.layout { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 248px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--panel);
  padding: 1.75rem 1.25rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  margin-bottom: 2rem;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
}

.nav { display: flex; flex-direction: column; gap: 2px; }

.nav-label {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 1.25rem 0 0.4rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: 7px;
  font-size: 0.92rem;
}

.nav a:hover { color: var(--text); background: var(--accent-soft); }

.nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); font-weight: 600; }

.sidebar-footer { margin-top: 2rem; font-size: 0.85rem; }
.sidebar-footer a { color: var(--muted); text-decoration: none; display: block; padding: 0.25rem 0; }
.sidebar-footer a:hover { color: var(--accent); }

/* ---------- Content ---------- */
.content {
  flex: 1;
  min-width: 0;
  padding: 3.5rem 3rem 5rem;
  max-width: 60rem;
}

h1 { font-size: 2.25rem; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.75rem; }
h2 { font-size: 1.35rem; margin: 2.75rem 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--border); letter-spacing: -0.01em; }
h2:first-of-type { margin-top: 2rem; }
h3 { font-size: 1.05rem; margin: 1.75rem 0 0.5rem; }
p { margin: 0.75rem 0; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 44rem; }

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

ul, ol { padding-left: 1.3rem; }
li { margin: 0.3rem 0; }

hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ---------- Hero (landing) ---------- */
.hero { padding: 1rem 0 2.5rem; }
.hero .pill {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
  margin-bottom: 1rem;
}
.hero h1 { font-size: 3rem; max-width: 38rem; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.hero-badges span {
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.75rem;
  background: var(--panel);
}

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.75rem 0 0; }

.cta {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.6rem 1.2rem;
  border-radius: 10px;
}
.cta-primary { background: var(--accent); color: #fff; }
.cta-primary:hover { filter: brightness(1.08); }
.cta-ghost { border: 1px solid var(--border); color: var(--text); background: var(--panel); }
.cta-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; margin: 1.5rem 0; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow);
}

.card h3 { margin: 0 0 0.25rem; font-size: 1rem; }
.card p { margin: 0; font-size: 0.88rem; color: var(--muted); }
.card a { color: inherit; text-decoration: none; }
.card a:hover h3 { color: var(--accent); }

.card .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.15rem 0.55rem;
  border-radius: 5px;
  margin-bottom: 0.5rem;
}

/* ---------- Code ---------- */
code {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--accent-soft);
  color: var(--text);
  padding: 0.12em 0.4em;
  border-radius: 5px;
}

pre {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

pre code { background: none; color: inherit; padding: 0; font-size: 0.84rem; line-height: 1.6; }

.code-block { position: relative; margin: 1rem 0; }

.code-lang {
  position: absolute;
  top: 0.55rem;
  right: 0.8rem;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(230, 237, 245, 0.4);
  font-family: ui-monospace, monospace;
  pointer-events: none;
}

/* ---------- Tables ---------- */
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.8rem; border-bottom: 1px solid var(--border); }
th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
tbody tr:hover { background: var(--accent-soft); }

/* ---------- Callouts ---------- */
.note {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.92rem;
}
.note strong { color: var(--accent); }

/* ---------- Provider sections (examples page) ---------- */
.provider-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.provider-section:first-child { border-top: none; padding-top: 0; }
.provider-heading { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
.provider-heading h2 { border: none; margin: 0; padding: 0; }

/* ---------- TOC ---------- */
.toc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.toc h3 { margin: 0 0 0.5rem; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); }
.toc ul { margin: 0; columns: 2; padding-left: 1.1rem; }
.toc a { text-decoration: none; font-size: 0.92rem; }
.toc a:hover { text-decoration: underline; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; border-right: none; border-bottom: 1px solid var(--border); padding: 1rem 1.25rem 0.5rem; }
  .brand { margin-bottom: 0.75rem; }
  .nav { flex-direction: row; flex-wrap: wrap; gap: 0.35rem; }
  .nav-label, .sidebar-footer { display: none; }
  .content { padding: 2rem 1.25rem 4rem; }
  .hero h1 { font-size: 2.2rem; }
  .toc ul { columns: 1; }
}