:root {
  --bg: #1b1b1b;
  --panel: #232323;
  --panel-2: #2d2d2d;
  --text: #d8d8d8;
  --muted: #a0a0a0;
  --accent: #0b5f5f;
  --accent-2: #2f3f3f;
  --border: #3a3a3a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

pre {
  margin: 8px 0;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #1c1c1c;
  overflow-x: auto;
}

.docs-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  padding: 14px 12px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0;
  font-size: 0.95rem;
}

.nav-group {
  margin: 10px 0;
}

.nav-title {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list li {
  margin: 1px 0;
}

.nav-link {
  display: block;
  border: 1px solid transparent;
  border-radius: 2px;
  padding: 5px 7px;
  color: var(--text);
  font-size: 0.9rem;
}

.nav-link:hover {
  background: #2c2c2c;
  text-decoration: none;
}

.nav-link.active {
  background: var(--accent-2);
  border-color: #4a6464;
  color: var(--text);
}

.content {
  padding: 14px 16px 24px;
  max-width: 920px;
}

.topline {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.chip {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  border-radius: 2px;
  padding: 2px 6px;
  font-size: 0.72rem;
}

.hero,
.card,
.section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 2px;
}

.hero {
  padding: 10px 12px;
  margin-bottom: 8px;
}

.hero h1 {
  margin: 0 0 4px;
  font-size: 1.35rem;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 65ch;
}

.hero-banner {
  display: block;
  width: min(100%, 520px);
  height: auto;
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #1b1b1b;
}

.card,
.section {
  padding: 10px 12px;
  margin-bottom: 8px;
}

h1,
h2,
h3 {
  margin-top: 0;
}

h2 {
  margin-bottom: 5px;
  font-size: 1.08rem;
}

h3 {
  font-size: 0.95rem;
}

.section h3 {
  margin: 14px 0 8px;
}

.section h2 + h3 {
  margin-top: 8px;
}

.muted {
  color: var(--muted);
}

.list {
  margin: 0;
  padding-left: 20px;
}

.list li {
  margin: 4px 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.btn {
  display: inline-block;
  border-radius: 2px;
  border: 1px solid var(--border);
  padding: 5px 9px;
  background: var(--panel-2);
  color: var(--text);
  font-weight: 500;
  font-size: 0.88rem;
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
}

.footer-note {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 6px;
}

.note {
  border: 1px solid var(--border);
  background: var(--panel-2);
  padding: 8px 9px;
  border-radius: 2px;
  margin: 8px 0;
}

.kbd {
  display: inline-block;
  border: 1px solid var(--border);
  background: #1c1c1c;
  padding: 1px 5px;
  border-radius: 2px;
  font-size: 0.82rem;
  color: var(--text);
}

.diagram {
  border: 1px solid var(--border);
  background: #1c1c1c;
  padding: 8px 9px;
  border-radius: 2px;
  margin: 8px 0;
  white-space: pre;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.3;
}

.diagram-svg {
  border: 1px solid var(--border);
  background: #1c1c1c;
  padding: 8px 9px;
  border-radius: 2px;
  margin: 8px 0;
}

.diagram-svg img {
  display: block;
  width: 100%;
  height: auto;
}

.diagram-svg figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.kv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 8px 0;
}

.kv-table th,
.kv-table td {
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  padding: 6px 7px;
}

.kv-table th {
  background: var(--panel-2);
  font-weight: 600;
}

.release-notes p {
  margin: 0 0 12px;
}

.release-notes h2 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.release-notes h3 {
  margin-top: 18px;
  margin-bottom: 8px;
}

@media (max-width: 920px) {
  .docs-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .content {
    padding: 10px 10px 18px;
  }
}