:root {
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --surface-3: #f1f5f9;
  --code-bg: #0b1220;
  --code-fg: #e2e8f0;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --accent-ink: #115e59;
  --warn-bg: #fff7ed;
  --warn-ink: #9a3412;
  --warn-line: #fdba74;
  --ok-bg: #ecfdf5;
  --ok-ink: #065f46;
  --radius: 10px;
  --sidebar-w: 280px;
  --max: 1120px;
  --font: "Source Sans 3", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--surface-2);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

img {
  max-width: 100%;
}

code,
pre,
kbd {
  font-family: var(--mono);
}

code {
  font-size: 0.9em;
  background: var(--surface-3);
  border: 1px solid var(--line);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  margin: 0;
  overflow-x: auto;
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  font-size: 0.84rem;
  line-height: 1.55;
  border: 1px solid #1e293b;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: calc(var(--max) + var(--sidebar-w));
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  color: inherit;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
}

.brand-sub {
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border: 1px solid #99f6e4;
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
}

.menu-btn {
  display: none;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.shell {
  max-width: calc(var(--max) + var(--sidebar-w));
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 0;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 3.6rem;
  height: calc(100vh - 3.6rem);
  overflow: auto;
  padding: 1.5rem 1rem 2rem 1.25rem;
  border-right: 1px solid var(--line);
  background: var(--surface);
}

.nav-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 1.25rem 0 0.45rem;
}

.nav-label:first-child {
  margin-top: 0;
}

.sidebar a {
  display: block;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  font-size: 0.92rem;
}

.sidebar a:hover,
.sidebar a:focus {
  background: var(--surface-3);
  color: var(--ink);
}

.sidebar a.active {
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-weight: 600;
}

.content {
  padding: 1.75rem 1.5rem 4rem;
  min-width: 0;
}

.hero {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.75rem 1.5rem;
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 52rem;
  font-size: 1.05rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.1rem;
}

.chip {
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  color: var(--ink-soft);
}

section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.4rem 1.35rem 1.5rem;
  margin-bottom: 1.15rem;
}

section > h2 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

section > h3 {
  margin: 1.4rem 0 0.55rem;
  font-size: 1.05rem;
}

section p {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
}

section p:last-child {
  margin-bottom: 0;
}

.endpoint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin: 0.85rem 0 1rem;
  padding: 0.75rem 0.9rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.method {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--accent);
  border-radius: 5px;
  padding: 0.28rem 0.5rem;
}

.endpoint-url {
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--ink);
  word-break: break-all;
}

.callout {
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  margin: 1rem 0;
  border: 1px solid var(--line);
  background: var(--surface-2);
}

.callout.warn {
  background: var(--warn-bg);
  border-color: var(--warn-line);
  color: var(--warn-ink);
}

.callout.ok {
  background: var(--ok-bg);
  border-color: #6ee7b7;
  color: var(--ok-ink);
}

.callout strong {
  display: block;
  margin-bottom: 0.2rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 0.85rem 0 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 0.92rem;
}

th,
td {
  text-align: left;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: var(--surface-3);
  color: var(--ink-soft);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

td code {
  white-space: nowrap;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--line);
  background: var(--surface-3);
  color: var(--ink-soft);
}

.tag.req {
  background: #fee2e2;
  border-color: #fecaca;
  color: #991b1b;
}

.tag.opt {
  background: var(--surface-3);
  color: var(--muted);
}

.example-block {
  margin: 1rem 0;
}

.example-block h4 {
  margin: 0 0 0.45rem;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer {
  max-width: calc(var(--max) + var(--sidebar-w));
  margin: 0 auto;
  padding: 1rem 1.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer a {
  color: inherit;
}

@media (max-width: 920px) {
  .menu-btn {
    display: inline-flex;
  }

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

  .sidebar {
    position: fixed;
    inset: 3.55rem auto 0 0;
    width: min(86vw, 300px);
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    z-index: 30;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.18);
    border-right: 1px solid var(--line);
  }

  body.nav-open .sidebar {
    transform: translateX(0);
  }

  .content {
    padding: 1.15rem 1rem 3rem;
  }

  .hero,
  section {
    padding: 1.15rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .sidebar {
    transition: none;
  }
}