/* DevRef - 开发者命令速查站 */
:root {
  --bg: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --border-light: #484f58;
  --text: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --link: #58a6ff;
  --link-hover: #79c0ff;
  --accent: #58a6ff;
  --accent-subtle: rgba(56,139,253,0.1);
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --code-bg: #0d1117;
  --code-border: #30363d;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --max-width: 1200px;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, 'Noto Sans SC', sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 14px;
}

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
}
.site-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-logo:hover { color: var(--text); text-decoration: none; }
.site-logo .logo-icon { color: var(--accent); }
.site-nav { display: flex; gap: 16px; flex-wrap: wrap; }
.site-nav a {
  color: var(--text-secondary);
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 4px;
}
.site-nav a:hover { color: var(--text); background: var(--bg-tertiary); text-decoration: none; }
.site-nav a.active { color: var(--accent); background: var(--accent-subtle); }

/* Breadcrumb */
.breadcrumb {
  padding: 12px 0;
  font-size: 13px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb span { margin: 0 6px; }

/* Hero */
.hero {
  padding: 48px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero h1 { font-size: 32px; margin-bottom: 12px; font-weight: 700; }
.hero p { color: var(--text-secondary); font-size: 15px; max-width: 600px; margin: 0 auto; }

/* Topic Grid */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.topic-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.2s;
}
.topic-card:hover { border-color: var(--accent); text-decoration: none; }
.topic-card-name { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.topic-card-desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }
.topic-card-count { font-size: 12px; color: var(--text-muted); }

/* Command List */
.cmd-list { list-style: none; }
.cmd-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.cmd-item:last-child { border-bottom: none; }
.cmd-name {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  white-space: nowrap;
  min-width: 160px;
}
.cmd-desc { font-size: 13px; color: var(--text-secondary); }

/* Code Block */
.code-block {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  margin: 12px 0;
  overflow: hidden;
}
.code-block pre {
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
}
.code-block .copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
}
.code-block:hover .copy-btn { opacity: 1; }
.code-block .copy-btn:hover { color: var(--text); border-color: var(--border-light); }
.code-block .copy-btn.copied { color: var(--success); }

/* Syntax Highlighting */
.hl-cmd { color: #79c0ff; }
.hl-flag { color: #d2a8ff; }
.hl-arg { color: #a5d6ff; }
.hl-comment { color: var(--text-muted); font-style: italic; }
.hl-output { color: var(--text-secondary); }
.hl-string { color: #a5d6ff; }
.hl-var { color: #ffa657; }

/* Param Table */
.param-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 16px 0;
}
.param-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
}
.param-table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  vertical-align: top;
}
.param-table code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-tertiary);
  padding: 2px 5px;
  border-radius: 3px;
  color: var(--accent);
}
.param-table tr:hover td { background: var(--accent-subtle); }

/* Section */
.section { margin: 32px 0; }
.section-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* Tags */
.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
}
.tag-common { background: rgba(56,139,253,0.15); color: var(--accent); }
.tag-advanced { background: rgba(210,153,34,0.15); color: var(--warning); }
.tag-danger { background: rgba(248,81,73,0.15); color: var(--danger); }
.tag-new { background: rgba(63,185,80,0.15); color: var(--success); }

/* Warning Box */
.warning-box {
  background: rgba(210,153,34,0.1);
  border: 1px solid rgba(210,153,34,0.3);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13px;
  color: var(--warning);
}
.warning-box strong { display: block; margin-bottom: 4px; }

/* Related Links */
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.related-link {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
}
.related-link:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Compare Table */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 16px 0;
}
.compare-table th {
  text-align: left;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  font-weight: 600;
}
.compare-table td {
  padding: 10px 12px;
  border: 1px solid var(--border);
}

/* Cheatsheet */
.cheatsheet-group { margin-bottom: 32px; }
.cheatsheet-group h3 {
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

/* Page Layout */
.page-content {
  padding: 24px 0 48px;
}
.page-content h1 {
  font-size: 24px;
  margin-bottom: 8px;
}
.page-content .page-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 24px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 48px;
  color: var(--text-muted);
  font-size: 12px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text); }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 24px; }
  .topic-grid { grid-template-columns: 1fr; }
  .cmd-item { flex-direction: column; gap: 4px; }
  .cmd-name { min-width: auto; }
  .param-table { display: block; overflow-x: auto; }
  .header-inner { flex-wrap: wrap; }
  .footer-inner { flex-direction: column; gap: 16px; }
}

@media (max-width: 480px) {
  .container { padding: 0 12px; }
  .site-nav { gap: 8px; }
  .page-content h1 { font-size: 20px; }
}

/* Print */
@media print {
  .site-header, .site-footer, .copy-btn, .breadcrumb { display: none; }
  body { background: #fff; color: #000; font-size: 11px; }
  .code-block { border: 1px solid #ccc; }
  .code-block pre { color: #000; }
  a { color: #000; text-decoration: underline; }
}