/* ===== GuLiN Terminal Docs - Docusaurus-Style Dark Theme ===== */
:root {
  --bg-primary: #1b1b2d;
  --bg-secondary: #1b1b2d;
  --bg-sidebar: #16162a;
  --bg-card: #1e1e32;
  --bg-hover: #2a2a44;
  --bg-code: #15152a;
  --border-color: #2d2d4a;
  --text-primary: #e4e4f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6c6c8a;
  --accent: #5b8def;
  --accent-hover: #7aa3ff;
  --accent-glow: rgba(91, 141, 239, 0.15);
  --green: #30c97a;
  --orange: #f0a030;
  --red: #e74c5e;
  --purple: #a78bfa;
  --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
  --sidebar-width: 280px;
  --header-height: 56px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-height);
  background: rgba(22, 22, 42, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  display: flex; align-items: center;
  padding: 0 20px;
}
.header-inner {
  max-width: 1440px; width: 100%; margin: 0 auto;
  display: flex; align-items: center; gap: 16px;
}
.header-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.1rem; color: var(--text-primary);
  text-decoration: none;
}
.header-logo svg { width: 28px; height: 28px; }
.header-logo span { background: linear-gradient(135deg, #5b8def, #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.header-spacer { flex: 1; }
.search-btn {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 8px; padding: 6px 14px;
  color: var(--text-muted); font-size: 0.85rem; cursor: pointer;
  transition: all 0.2s; width: 200px;
}
.search-btn:hover { border-color: var(--accent); color: var(--text-secondary); }
.search-btn kbd {
  margin-left: auto; font-size: 0.7rem; padding: 2px 6px;
  background: var(--bg-hover); border-radius: 4px;
  font-family: var(--font-mono); color: var(--text-muted);
}
.header-github {
  color: var(--text-muted); text-decoration: none;
  display: flex; align-items: center; gap: 6px; font-size: 0.85rem;
  transition: color 0.2s;
}
.header-github:hover { color: var(--text-primary); }

/* ===== LAYOUT ===== */
.layout-wrapper {
  max-width: 1440px; margin: 0 auto;
  display: flex; padding-top: var(--header-height);
  min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed; top: var(--header-height); left: 0;
  width: var(--sidebar-width); height: calc(100vh - var(--header-height));
  overflow-y: auto; overflow-x: hidden;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 16px 0;
  z-index: 50;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
.sidebar-section { margin-bottom: 8px; }
.sidebar-section-title {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 20px; font-size: 0.7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-muted); cursor: pointer;
  user-select: none;
}
.sidebar-section-title:hover { color: var(--text-secondary); }
.sidebar-section-title .arrow {
  font-size: 0.6rem; transition: transform 0.2s;
}
.sidebar-section-title .arrow.collapsed { transform: rotate(-90deg); }
.sidebar-links { overflow: hidden; transition: max-height 0.25s ease; }
.sidebar-link {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 20px 6px 28px;
  font-size: 0.85rem; color: var(--text-secondary);
  text-decoration: none; transition: all 0.15s;
  border-left: 2px solid transparent;
}
.sidebar-link:hover { color: var(--text-primary); background: var(--bg-hover); }
.sidebar-link.active {
  color: var(--accent); border-left-color: var(--accent);
  background: var(--accent-glow);
}
.sidebar-link .icon { font-size: 0.9rem; width: 18px; text-align: center; }

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-left: var(--sidebar-width);
  padding: 40px 56px 80px;
  flex: 1; max-width: 860px;
  min-height: calc(100vh - var(--header-height));
}
.page-header { margin-bottom: 32px; }
.page-breadcrumbs {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px;
}
.page-breadcrumbs a { color: var(--text-muted); text-decoration: none; }
.page-breadcrumbs a:hover { color: var(--accent); }
.page-title { font-size: 2.2rem; font-weight: 700; line-height: 1.2; margin-bottom: 8px; }
.page-desc { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.6; }

/* ===== CONTENT STYLES (Markdown rendering) ===== */
.content { font-size: 0.95rem; line-height: 1.75; color: var(--text-primary); }
.content h1 { font-size: 2rem; font-weight: 700; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--border-color); }
.content h2 { font-size: 1.5rem; font-weight: 600; margin: 32px 0 12px; }
.content h3 { font-size: 1.2rem; font-weight: 600; margin: 24px 0 8px; color: var(--accent); }
.content h4 { font-size: 1.05rem; font-weight: 600; margin: 20px 0 8px; }
.content p { margin-bottom: 16px; }
.content a { color: var(--accent); text-decoration: none; }
.content a:hover { text-decoration: underline; }
.content strong { font-weight: 600; color: #f0f0ff; }
.content ul, .content ol { margin: 8px 0 16px; padding-left: 24px; }
.content li { margin-bottom: 4px; }
.content code {
  font-family: var(--font-mono); font-size: 0.85em; padding: 2px 6px;
  background: var(--bg-code); border: 1px solid var(--border-color);
  border-radius: 4px; color: var(--orange);
}
.content pre {
  background: var(--bg-code); border: 1px solid var(--border-color);
  border-radius: 8px; padding: 16px 20px; margin: 16px 0;
  overflow-x: auto; font-size: 0.85rem;
}
.content pre code {
  background: none; border: none; padding: 0;
  color: var(--text-primary); font-size: 0.85rem;
}
.content blockquote {
  border-left: 3px solid var(--accent); padding: 8px 16px;
  margin: 16px 0; background: var(--accent-glow); border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
}
.content blockquote p { margin: 0; }
.content hr { border: none; border-top: 1px solid var(--border-color); margin: 32px 0; }
.content img { max-width: 100%; border-radius: 8px; margin: 16px 0; }
.content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.content th, .content td {
  padding: 10px 14px; border: 1px solid var(--border-color);
  text-align: left; font-size: 0.9rem;
}
.content th { background: var(--bg-hover); font-weight: 600; color: var(--text-primary); }
.content td { color: var(--text-secondary); }
.content tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

/* Feature cards (homepage) */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px; margin: 24px 0;
}
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 10px; padding: 20px; transition: all 0.2s; cursor: pointer;
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
.feature-card h3 { font-size: 1rem; font-weight: 600; margin: 0 0 6px; color: var(--text-primary); }
.feature-card p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* Info boxes */
.info-box {
  background: var(--accent-glow); border: 1px solid rgba(91, 141, 239, 0.2);
  border-radius: 8px; padding: 16px 20px; margin: 16px 0;
  display: flex; gap: 12px;
}
.info-box-icon { font-size: 1.2rem; flex-shrink: 0; }
.info-box-content { font-size: 0.9rem; color: var(--text-secondary); }
.info-box-content strong { color: var(--accent); }

/* ===== PAGE NAVIGATION (Previous/Next) ===== */
.page-nav {
  display: flex; justify-content: space-between;
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--border-color);
}
.page-nav-link {
  display: flex; flex-direction: column; gap: 4px;
  padding: 12px 16px; border-radius: 8px;
  text-decoration: none; transition: all 0.2s;
  max-width: 45%;
}
.page-nav-link:hover { background: var(--bg-card); }
.page-nav-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.page-nav-title { font-size: 0.95rem; color: var(--accent); font-weight: 500; }
.page-nav-link.next { text-align: right; align-items: flex-end; }

/* ===== FOOTER ===== */
.site-footer {
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.8rem; color: var(--text-muted);
}
.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

/* ===== SEARCH MODAL ===== */
.search-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  display: none; align-items: flex-start; justify-content: center;
  padding-top: 80px;
}
.search-overlay.open { display: flex; }
.search-modal {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 12px; width: 600px; max-width: 90vw;
  max-height: 60vh; overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.search-input-wrapper {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--border-color);
}
.search-input-wrapper input {
  flex: 1; background: none; border: none; outline: none;
  font-size: 1rem; color: var(--text-primary); font-family: var(--font-sans);
}
.search-input-wrapper input::placeholder { color: var(--text-muted); }
.search-results { overflow-y: auto; max-height: calc(60vh - 60px); padding: 8px 0; }
.search-result-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px; cursor: pointer; transition: background 0.15s;
  text-decoration: none; color: var(--text-primary);
}
.search-result-item:hover, .search-result-item.selected { background: var(--bg-hover); }
.search-result-item .icon { font-size: 1rem; }
.search-result-item .title { font-weight: 500; }
.search-result-item .path { font-size: 0.75rem; color: var(--text-muted); margin-left: auto; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; padding: 24px 20px 60px; }
  .mobile-menu-btn { display: flex !important; }
}
.mobile-menu-btn {
  display: none; align-items: center; justify-content: center;
  width: 36px; height: 36px; background: none; border: 1px solid var(--border-color);
  border-radius: 8px; color: var(--text-primary); cursor: pointer;
}
@media (max-width: 768px) {
  .search-btn { width: 36px; padding: 6px; }
  .search-btn span, .search-btn kbd { display: none; }
  .header-github span { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .page-title { font-size: 1.6rem; }
}