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

:root {
  --bg: #0b0d10;
  --surface: #14171c;
  --surface-2: #1a1e24;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --text: #f4f4f5;
  --text-dim: #a1a1aa;
  --text-mute: #71717a;
  --accent: #00d18f;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 10px;
  --radius-lg: 14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.logo svg { color: var(--accent); }

nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
}

nav ul a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s;
}

nav ul a:hover { color: var(--text); }
nav ul a.active { color: var(--text); }

footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-mute);
  font-size: 13px;
  margin-top: 60px;
}

/* ---------- Document pages (docs, whitepaper) ---------- */
.doc-layout {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 32px 48px;
}

.doc-header {
  margin-bottom: 48px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.doc-kicker {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 600;
}

.doc-header h1 {
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 14px;
}

.doc-header .doc-sub {
  font-size: 16px;
  color: var(--text-dim);
  max-width: 640px;
}

.doc-meta {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-mute);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

.doc-body h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 48px 0 16px;
  padding-top: 8px;
}

.doc-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 10px;
  color: var(--text);
}

.doc-body p {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 14px;
  line-height: 1.7;
}

.doc-body strong {
  color: var(--text);
  font-weight: 600;
}

.doc-body ul, .doc-body ol {
  margin: 0 0 16px 20px;
  color: var(--text-dim);
}

.doc-body li {
  font-size: 15px;
  margin-bottom: 8px;
  line-height: 1.7;
}

.doc-body code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

.doc-body pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 16px 0 20px;
}

.doc-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

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

.doc-body a:hover { text-decoration: underline; }

.doc-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 6px 18px;
  margin: 16px 0;
  color: var(--text-dim);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0;
}

.callout-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.callout p { margin-bottom: 0; font-size: 14px; }

/* ---------- Table of contents ---------- */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 40px;
}

.toc-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 12px;
  font-weight: 600;
}

.toc ol {
  list-style: decimal;
  margin-left: 20px;
}

.toc li {
  margin-bottom: 6px;
  font-size: 14px;
}

.toc a {
  color: var(--text-dim);
  text-decoration: none;
}

.toc a:hover { color: var(--text); }

/* ---------- Table ---------- */
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
}

.doc-body th, .doc-body td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.doc-body th {
  color: var(--text);
  font-weight: 600;
  font-size: 13px;
  background: var(--surface);
}

.doc-body td { color: var(--text-dim); }

@media (max-width: 720px) {
  nav { padding: 16px 20px; }
  nav ul { gap: 16px; }
  .doc-layout { padding: 32px 20px; }
  .doc-header h1 { font-size: 30px; }
  .doc-body h2 { font-size: 20px; }
}