:root {
  color-scheme: dark;
  --bg: #071015;
  --bg-soft: #0d171f;
  --panel: #111d26;
  --panel-strong: #162633;
  --line: #263846;
  --line-strong: #365363;
  --text: #e8eef2;
  --muted: #9eb0bc;
  --subtle: #6e818d;
  --cyan: #27c4cf;
  --green: #43d17f;
  --amber: #f6b84b;
  --red: #ef6675;
  --sidebar-w: 260px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  display: flex;
}

a { color: inherit; }

/* ──────── Typography (markdown-rendered) ──────── */

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

.md-content h2 {
  margin: 28px 0 10px;
  font-size: 1.3rem;
  color: var(--text);
}
.md-content h2:first-child { margin-top: 18px; }

.md-content h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
  color: var(--text);
}

.md-content p { margin: 8px 0 14px; }
.md-content strong { color: var(--text); }

.md-content a {
  color: var(--cyan);
  text-decoration: none;
}
.md-content a:hover { text-decoration: underline; }

/* ──────── Code ──────── */

.md-content code,
pre code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.md-content code {
  color: #b9f1f3;
  background: rgba(39,196,207,0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.md-content pre {
  overflow-x: auto;
  margin: 16px 0;
  padding: 16px;
  background: #071018;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.md-content pre code {
  background: none;
  color: #d9f7f9;
  padding: 0;
  font-size: 0.88rem;
  line-height: 1.55;
}

/* ──────── Tables ──────── */

.md-content table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 16px 0;
}

.md-content th,
.md-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.md-content th {
  color: var(--text);
  background: rgba(255,255,255,0.035);
  font-weight: 700;
  font-size: 0.88rem;
}

.md-content td {
  color: var(--muted);
  font-size: 0.9rem;
}
.md-content tr:last-child th,
.md-content tr:last-child td { border-bottom: 0; }

/* ──────── Lists ──────── */

.md-content ol,
.md-content ul {
  margin: 10px 0 14px;
  padding-left: 22px;
}
.md-content li { margin: 6px 0; }

/* ──────── Blockquotes (callouts) ──────── */

.md-content blockquote {
  margin: 18px 0;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: rgba(17,29,38,0.92);
  border-radius: 0 8px 8px 0;
  box-shadow: var(--shadow);
}
.md-content blockquote p { margin: 4px 0; }
.md-content blockquote strong { color: var(--amber); }

/* ──────── Horizontal rules ──────── */

.md-content hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }

/* ──────── Error fallback ──────── */

.md-error {
  color: var(--red);
  font-style: italic;
}

/* ──────── Sidebar ──────── */

.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background:
    linear-gradient(rgba(39,196,207,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(39,196,207,0.025) 1px, transparent 1px),
    var(--bg-soft);
  background-size: 24px 24px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  z-index: 20;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 34px; height: 34px;
  display: inline-grid; place-items: center;
  border: 1px solid rgba(39,196,207,0.5);
  border-radius: 8px;
  background: rgba(39,196,207,0.14);
  color: #b9f7fa;
}

.sidebar-nav { padding: 14px 0 28px; flex: 1; }

.nav-section {
  margin: 18px 20px 6px;
  color: var(--subtle);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-link {
  display: block;
  padding: 7px 20px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text);
  background: rgba(255,255,255,0.04);
  outline: none;
}

.nav-link.active {
  color: var(--cyan);
  background: rgba(39,196,207,0.08);
  border-left-color: var(--cyan);
}

/* ──────── Mobile sidebar toggle ──────── */

.sidebar-toggle { display: none; }
.sidebar-overlay { display: none; }
.sidebar-close { display: none; }

.hamburger {
  display: none;
  position: fixed; top: 16px; left: 16px; z-index: 30;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 1.3rem;
  cursor: pointer;
}

/* ──────── Main content ──────── */

.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  padding: 0 48px 0 48px;
  max-width: 960px;
}

.doc-hero {
  padding: 72px 0 44px;
}

.doc-hero h1 {
  margin: 0;
  font-size: clamp(2.8rem, 5vw, 5.2rem);
  line-height: 1.05;
}

.lead {
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.doc-section {
  padding: 64px 0;
  border-top: 1px solid rgba(54,83,99,0.52);
}

.doc-section > h2 {
  margin: 0 0 18px;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.15;
}

/* ──────── Footer ──────── */

.doc-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 86px;
  border-top: 1px solid rgba(54,83,99,0.52);
  color: var(--subtle);
}

/* ──────── Responsive ──────── */

@media (max-width: 860px) {
  :root { --sidebar-w: 0px; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }

  .sidebar-toggle:checked ~ .sidebar { transform: translateX(0); }
  .sidebar-toggle:checked ~ .sidebar-overlay {
    display: block;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 15;
  }

  .sidebar-close { display: flex; font-size: 1.5rem; cursor: pointer; color: var(--muted); }
  .hamburger { display: flex; }

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

  .doc-hero { padding-top: 64px; }
}

@media (max-width: 500px) {
  .doc-footer { flex-direction: column; align-items: flex-start; padding: 20px 0; }
  .md-content th, .md-content td { padding: 10px 12px; }
}