/* Shared styles for the client-side .md browsers
   (docs/browse.html and docs/tutorial/browse.html). */

:root {
  --bg:           #ffffff;
  --fg:           #1f2328;
  --muted:        #656d76;
  --border:       #d0d7de;
  --sidebar-bg:   #f6f8fa;
  --link:         #0969da;
  --link-hover:   #0550ae;
  --code-bg:      #f6f8fa;
  --code-border:  #d0d7de;
  --kbd-bg:       #f6f8fa;
  --selected-bg:  #ddf4ff;
  --selected-fg:  #0550ae;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:           #0d1117;
    --fg:           #e6edf3;
    --muted:        #8b949e;
    --border:       #30363d;
    --sidebar-bg:   #161b22;
    --link:         #2f81f7;
    --link-hover:   #58a6ff;
    --code-bg:      #161b22;
    --code-border:  #30363d;
    --kbd-bg:       #161b22;
    --selected-bg:  #1f2d3d;
    --selected-fg:  #58a6ff;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
               Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.app {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  position: sticky;
  top: 0;
  height: 100vh;
}

.siblings {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.siblings .sibling {
  font-size: 13px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--fg);
  text-decoration: none;
  background: var(--bg);
}

.siblings .sibling:hover { background: rgba(127, 127, 127, 0.12); }

.siblings .sibling.current {
  background: var(--selected-bg);
  color: var(--selected-fg);
  border-color: var(--selected-fg);
  font-weight: 600;
}

.sidebar h1 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 12px;
}

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

.sidebar li { margin: 2px 0; }

.sidebar a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
  font-size: 14px;
  word-break: break-word;
}

.sidebar a:hover { background: rgba(127, 127, 127, 0.12); }

.sidebar a.active {
  background: var(--selected-bg);
  color: var(--selected-fg);
  font-weight: 600;
}

.content {
  padding: 32px 48px;
  max-width: 920px;
  overflow-x: auto;
}

.content h1, .content h2, .content h3,
.content h4, .content h5, .content h6 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  line-height: 1.25;
}

.content h1 { font-size: 2em;   border-bottom: 1px solid var(--border); padding-bottom: .3em; }
.content h2 { font-size: 1.5em; border-bottom: 1px solid var(--border); padding-bottom: .3em; }
.content h3 { font-size: 1.25em; }

.content p, .content ul, .content ol, .content blockquote, .content table {
  margin: 0 0 1em;
}

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

.content code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.content pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 6px;
  padding: 12px 14px;
  overflow-x: auto;
}

.content pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 0.9em;
}

.content blockquote {
  margin: 0 0 1em;
  padding: 0 1em;
  color: var(--muted);
  border-left: 4px solid var(--border);
}

.content table {
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

.content th, .content td {
  border: 1px solid var(--border);
  padding: 6px 12px;
}

.content th { background: var(--sidebar-bg); }

.content hr {
  height: 1px;
  background: var(--border);
  border: 0;
  margin: 24px 0;
}

.status {
  color: var(--muted);
  font-style: italic;
}

.error {
  background: #ffeef0;
  border: 1px solid #ffd7d9;
  color: #82071e;
  padding: 12px 16px;
  border-radius: 6px;
}

@media (prefers-color-scheme: dark) {
  .error {
    background: #2d1316;
    border-color: #6e1620;
    color: #ffa198;
  }
}

@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .content { padding: 20px; }
}