/* Prototyper Docs — minimal, clean, dark-mode aware */

:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6a737d;
  --border: #e1e4e8;
  --sidebar-bg: #f8f9fa;
  --accent: #0366d6;
  --accent-bg: #f1f8ff;
  --code-bg: #f6f8fa;
  --code-fg: #24292e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #c9d1d9;
    --muted: #8b949e;
    --border: #30363d;
    --sidebar-bg: #161b22;
    --accent: #58a6ff;
    --accent-bg: #1f6feb33;
    --code-bg: #161b22;
    --code-fg: #c9d1d9;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 600;
  font-size: 18px;
  color: var(--fg);
}

.gh-link {
  font-size: 14px;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  max-width: 1280px;
  margin: 0 auto;
}

.sidebar {
  padding: 24px 16px;
  border-right: 1px solid var(--border);
  background: var(--sidebar-bg);
  min-height: calc(100vh - 130px);
  position: sticky;
  top: 65px;
  height: calc(100vh - 65px);
  overflow-y: auto;
}

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

.nav-item { margin-bottom: 16px; }

.nav-group-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 8px;
  padding: 0 8px;
}

.nav-sublist li a, .nav-top {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--fg);
}

.nav-sublist li a:hover, .nav-top:hover {
  background: var(--accent-bg);
  text-decoration: none;
}

.nav-sublist li a.active {
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 600;
}

.content {
  padding: 32px 48px;
  max-width: 900px;
}

.page { /* article container */ }

.page > h1:first-child {
  margin-top: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 32px;
  font-weight: 600;
}

h2 { margin-top: 32px; font-size: 24px; font-weight: 600; }
h3 { margin-top: 24px; font-size: 20px; font-weight: 600; }
h4 { margin-top: 20px; font-size: 16px; font-weight: 600; }

p, ul, ol { margin: 12px 0; }

ul, ol { padding-left: 24px; }

code {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 16px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.5;
}

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

table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 14px;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

th {
  background: var(--sidebar-bg);
  font-weight: 600;
}

tr:nth-child(even) { background: var(--sidebar-bg); }

blockquote {
  margin: 16px 0;
  padding: 8px 16px;
  border-left: 4px solid var(--border);
  color: var(--muted);
  background: var(--sidebar-bg);
  border-radius: 0 6px 6px 0;
}

.site-footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
}

/* Mermaid diagrams */
.mermaid { background: var(--bg); }

/* Mobile */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: relative;
    height: auto;
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    top: 0;
  }
  .content { padding: 24px 16px; }
}