:root {
  --bg-deep: #06090f;
  --bg-panel: #0c1219;
  --bg-elevated: #111a24;
  --grid-line: rgba(61, 255, 154, 0.06);
  --text-primary: #e4eaf2;
  --text-muted: #96a5b8;
  --text-dim: #7a8a9e;
  --phosphor: #3dff9a;
  --phosphor-dim: rgba(61, 255, 154, 0.15);
  --violet: #9b7dff;
  --border: rgba(255, 255, 255, 0.07);
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.shell {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

@media (max-width: 640px) {
  .shell { padding: 0 16px 64px; }
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 640px) {
  .site-header { padding: 20px 0; }
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border: 1px solid var(--phosphor);
  position: relative;
  flex-shrink: 0;
}

.logo-mark::before,
.logo-mark::after {
  content: "";
  position: absolute;
  background: var(--phosphor);
}

.logo-mark::before {
  width: 60%;
  height: 1px;
  top: 50%;
  left: 20%;
  transform: translateY(-50%);
}

.logo-mark::after {
  width: 1px;
  height: 60%;
  left: 50%;
  top: 20%;
  transform: translateX(-50%);
}

.logo-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logo-text em { font-style: normal; color: var(--phosphor); }

.header-nav {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.header-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.header-nav a:hover,
.header-nav a[aria-current="page"] { color: var(--phosphor); }

.header-nav a:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

.doc-hero {
  padding: 48px 0 32px;
}

.doc-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--phosphor);
  margin-bottom: 12px;
}

.doc-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 12px;
}

.doc-lead {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 56ch;
}

.doc-content {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 32px;
}

@media (max-width: 640px) {
  .doc-hero { padding: 32px 0 24px; }
  .doc-content { padding: 20px 16px; }
}

.doc-content h2 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--phosphor);
  margin: 28px 0 12px;
}

.doc-content h2:first-child { margin-top: 0; }

.doc-content p,
.doc-content li {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.doc-content ul { padding-left: 1.25rem; margin-bottom: 16px; }

.doc-content a {
  color: var(--phosphor);
  text-decoration: none;
}

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

.doc-content code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 2px;
}

.doc-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 16px 0;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.doc-content th,
.doc-content td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}

.doc-content th {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.change-list {
  list-style: none;
  padding: 0;
}

.change-list li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.change-added { color: var(--phosphor); }
.change-removed { color: #ff6b8a; }
.change-updated { color: var(--violet); }

.change-meta { color: var(--text-dim); }

.change-list a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.change-list a:hover { opacity: 0.85; }

.load-state {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.site-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover { color: var(--phosphor); }

@media (max-width: 640px) {
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

.footer-note {
  font-size: 0.72rem;
  color: var(--text-dim);
}