/* ===== CSS Variables & Reset ===== */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1c2333;
  --bg-input: #0d1117;
  --border: #30363d;
  --border-focus: #58a6ff;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-green: #3fb950;
  --accent-green-dim: rgba(63, 185, 80, 0.15);
  --accent-amber: #d29922;
  --accent-amber-dim: rgba(210, 153, 34, 0.15);
  --accent-red: #f85149;
  --accent-red-dim: rgba(248, 81, 73, 0.15);
  --accent-blue: #58a6ff;
  --accent-blue-dim: rgba(88, 166, 255, 0.1);
  --accent-purple: #bc8cff;
  --json-key: #79c0ff;
  --json-string: #a5d6ff;
  --json-number: #d2a8ff;
  --json-boolean: #ff7b72;
  --json-null: #ffa657;
  --json-brace: #8b949e;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(63, 185, 80, 0.1);
  --transition: 150ms ease;
  --transition-medium: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --max-width: 1200px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-ui);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(63, 185, 80, 0.3);
  color: var(--text-primary);
}

a { color: var(--accent-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-green); }

/* ===== Ad Slots ===== */
.ad-slot {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8px 20px;
  text-align: center;
  min-height: 10px;
}
.ad-slot-inner {
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 0;
  color: var(--text-muted);
  font-size: 0;
  min-height: 0;
  background: transparent;
}

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(22, 27, 34, 0.88);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  transition: opacity var(--transition);
}
.logo:hover { color: var(--text-primary); opacity: 0.85; }
.logo-icon {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-amber));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px; font-weight: 800;
  color: var(--bg-primary);
  box-shadow: 0 2px 8px rgba(63, 185, 80, 0.25);
}
.header-nav { display: flex; gap: 2px; align-items: center; }
.header-nav a {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-medium);
  white-space: nowrap;
}
.header-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.header-nav a.active {
  color: var(--accent-green);
  background: var(--accent-green-dim);
}
.mobile-menu-btn {
  display: none;
  background: none; border: none; color: var(--text-secondary);
  cursor: pointer; padding: 8px; font-size: 1.5rem; line-height: 1;
  transition: color var(--transition);
}
.mobile-menu-btn:hover { color: var(--text-primary); }
@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  .header-nav {
    display: none;
    position: absolute; top: 60px; left: 0; right: 0;
    background: rgba(22, 27, 34, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 8px;
  }
  .header-nav.open { display: flex; }
  .header-nav a { padding: 12px 16px; border-radius: var(--radius-sm); }
}

/* ===== Footer ===== */
.site-footer {
  margin-top: auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 20px;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p { color: var(--text-secondary); font-size: 0.875rem; margin-top: 10px; line-height: 1.7; }
.footer-links h4 { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); margin-bottom: 14px; font-weight: 600; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: var(--text-secondary); font-size: 0.875rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--accent-green); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 28px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
@media (max-width: 640px) {
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px;
}

/* ===== Tool Page Layout ===== */
.tool-header { margin-bottom: 28px; }
.tool-header h1 {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.tool-header p { color: var(--text-secondary); font-size: 1.05rem; line-height: 1.6; }

.tool-grid {
  display: grid;
  gap: 20px;
}
.tool-grid.two-col { grid-template-columns: 1fr 1fr; }
@media (max-width: 900px) { .tool-grid.two-col { grid-template-columns: 1fr; } }

/* ===== Panels ===== */
.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-medium);
}
.panel:focus-within {
  border-color: rgba(88, 166, 255, 0.3);
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
  flex-wrap: wrap;
  gap: 8px;
}
.panel-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}
.panel-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.panel-body { padding: 0; position: relative; }

/* ===== Textarea / Code Input ===== */
.code-input-wrap {
  position: relative;
  display: flex;
}
.line-numbers {
  width: 48px; min-width: 48px;
  padding: 16px 8px 16px 0;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-right: 1px solid var(--border);
  user-select: none;
  overflow: hidden;
}
.code-input {
  flex: 1;
  width: 100%;
  min-height: 300px;
  padding: 16px;
  border: none;
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  tab-size: 2;
  transition: box-shadow var(--transition-medium);
}
.code-input::placeholder { color: var(--text-muted); }
.code-input:focus { box-shadow: inset 0 0 0 1px var(--border-focus); }

/* ===== Code Output (syntax highlighted) ===== */
.code-output {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  min-height: 300px;
  overflow: auto;
  white-space: pre;
  background: var(--bg-input);
  color: var(--text-primary);
  tab-size: 2;
}

/* Syntax highlighting classes */
.syn-key { color: var(--json-key); }
.syn-str { color: var(--json-string); }
.syn-num { color: var(--json-number); }
.syn-bool { color: var(--json-boolean); }
.syn-null { color: var(--json-null); }
.syn-brace { color: var(--json-brace); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.8rem; font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-medium);
  white-space: nowrap;
  user-select: none;
}
.btn:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
  background: var(--bg-secondary);
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn-primary {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: var(--bg-primary);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(63, 185, 80, 0.2);
}
.btn-primary:hover {
  background: #46c358;
  border-color: #46c358;
  color: var(--bg-primary);
  box-shadow: 0 4px 16px rgba(63, 185, 80, 0.3);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(63, 185, 80, 0.2);
}
.btn-amber { background: var(--accent-amber); border-color: var(--accent-amber); color: var(--bg-primary); font-weight: 600; }
.btn-amber:hover { background: #dba430; border-color: #dba430; color: var(--bg-primary); transform: translateY(-1px); }
.btn svg, .btn img { width: 14px; height: 14px; }

/* ===== Status Messages ===== */
.status-bar {
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  display: none;
  align-items: center;
  gap: 8px;
}
.status-bar.visible { display: flex; }
.status-bar.success { background: var(--accent-green-dim); color: var(--accent-green); border-top: 1px solid rgba(63,185,80,0.3); }
.status-bar.error { background: var(--accent-red-dim); color: var(--accent-red); border-top: 1px solid rgba(248,81,73,0.3); }
.status-bar.info { background: var(--accent-blue-dim); color: var(--accent-blue); border-top: 1px solid rgba(88,166,255,0.3); }
.status-icon { font-size: 1rem; flex-shrink: 0; }

/* ===== Drag & Drop Overlay ===== */
.drop-overlay {
  position: absolute;
  inset: 0;
  background: rgba(63, 185, 80, 0.08);
  border: 2px dashed var(--accent-green);
  border-radius: var(--radius-md);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
  pointer-events: none;
  font-weight: 600;
  color: var(--accent-green);
  font-size: 0.95rem;
  backdrop-filter: blur(4px);
}
.drop-overlay.visible { display: flex; }

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: 24px; right: 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translateY(80px);
  opacity: 0;
  transition: all 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 1000;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ===== Size Stats ===== */
.stats-bar {
  display: flex;
  gap: 20px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
.stat-item { display: flex; align-items: center; gap: 6px; }
.stat-value { color: var(--accent-amber); font-weight: 600; font-family: var(--font-mono); }
.stat-good { color: var(--accent-green); }

/* ===== Tree View ===== */
.tree-view { padding: 16px; font-family: var(--font-mono); font-size: 0.85rem; line-height: 1.8; }
.tree-node { }
.tree-toggle {
  cursor: pointer;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 4px;
  border-radius: 3px;
  transition: background var(--transition);
}
.tree-toggle:hover { color: var(--accent-blue); background: var(--accent-blue-dim); }
.tree-arrow {
  display: inline-block;
  width: 16px;
  text-align: center;
  color: var(--text-muted);
  transition: transform var(--transition);
  font-size: 0.7rem;
}
.tree-arrow.collapsed { transform: rotate(-90deg); }
.tree-children { padding-left: 20px; }
.tree-children.collapsed { display: none; }
.tree-key { color: var(--json-key); }
.tree-str { color: var(--json-string); }
.tree-num { color: var(--json-number); }
.tree-bool { color: var(--json-boolean); }
.tree-null { color: var(--json-null); }
.tree-bracket { color: var(--json-brace); }
.tree-comma { color: var(--text-muted); }
.tree-count { color: var(--text-muted); font-size: 0.75rem; font-style: italic; }

/* ===== Table ===== */
.table-wrap { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.data-table th {
  background: var(--bg-tertiary);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--accent-amber);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.data-table td {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background var(--transition);
}
.data-table tr:hover td { background: var(--bg-tertiary); }

/* ===== Diff Styles ===== */
.diff-added { background: var(--accent-green-dim); }
.diff-removed { background: var(--accent-red-dim); }
.diff-changed { background: var(--accent-amber-dim); }
.diff-line { padding: 2px 8px; display: flex; gap: 8px; font-family: var(--font-mono); font-size: 0.84rem; line-height: 1.7; border-bottom: 1px solid rgba(48,54,61,0.4); }
.diff-marker { width: 16px; text-align: center; flex-shrink: 0; font-weight: 700; }
.diff-marker.add { color: var(--accent-green); }
.diff-marker.remove { color: var(--accent-red); }
.diff-marker.change { color: var(--accent-amber); }
.diff-path { color: var(--text-muted); min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.diff-val { color: var(--text-primary); word-break: break-all; }
.diff-summary {
  padding: 12px 16px;
  display: flex; gap: 16px; flex-wrap: wrap;
  font-size: 0.84rem;
  border-bottom: 1px solid var(--border);
  background: rgba(28, 35, 51, 0.5);
}
.diff-stat { display: flex; align-items: center; gap: 4px; font-weight: 600; }
.diff-stat.additions { color: var(--accent-green); }
.diff-stat.deletions { color: var(--accent-red); }
.diff-stat.changes { color: var(--accent-amber); }

/* ===== Tabs ===== */
.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
}
.tab-btn {
  padding: 10px 20px;
  background: none; border: none;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.85rem; font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-medium);
}
.tab-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.02); }
.tab-btn.active { color: var(--accent-green); border-bottom-color: var(--accent-green); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Content Section (below tools) ===== */
.content-section {
  margin-top: 48px;
  padding: 36px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.content-section h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.content-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 10px;
  color: var(--accent-amber);
}
.content-section p, .content-section li {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 12px;
}
.content-section ul { padding-left: 20px; }
.content-section li { margin-bottom: 8px; }
.content-section code {
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.84em;
  color: var(--accent-green);
  border: 1px solid rgba(48, 54, 61, 0.6);
}

/* ===== Index Page: Hero ===== */
.hero {
  text-align: center;
  padding: 60px 20px 40px;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(63, 185, 80, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-amber));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  color: var(--text-secondary);
  font-size: 1.2rem;
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}
@media (max-width: 640px) {
  .hero { padding: 40px 20px 28px; }
  .hero h1 { font-size: 1.9rem; }
  .hero p { font-size: 1rem; }
}

/* ===== Index Page: Tool Cards ===== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 18px;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 20px;
}
@media (max-width: 400px) { .tools-grid { grid-template-columns: 1fr; } }
.tool-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-slow);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-green), transparent);
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.tool-card:hover {
  border-color: rgba(63, 185, 80, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), var(--shadow-glow);
}
.tool-card:hover::before {
  opacity: 1;
}
.tool-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
  flex-shrink: 0;
  transition: transform var(--transition-medium);
}
.tool-card:hover .tool-card-icon {
  transform: scale(1.08);
}
.tool-card h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.tool-card h2 a { color: var(--text-primary); transition: color var(--transition); }
.tool-card h2 a:hover { color: var(--accent-green); }
.tool-card p { color: var(--text-secondary); font-size: 0.9rem; flex: 1; margin-bottom: 20px; line-height: 1.7; }
.tool-card .btn { align-self: flex-start; }

/* ===== Features Row ===== */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: var(--max-width);
  margin: 56px auto 0;
  padding: 0 20px;
}
@media (max-width: 768px) { .features { grid-template-columns: 1fr; gap: 16px; } }
.feature {
  text-align: center;
  padding: 28px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-medium);
}
.feature:hover {
  background: var(--bg-secondary);
  border-color: var(--border);
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
  display: inline-block;
}
.feature h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.feature p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* ===== More Tools Cross-Linking Section ===== */
.more-tools {
  margin-top: 48px;
  padding: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.more-tools h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.more-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}
.more-tools-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-medium);
  text-decoration: none;
}
.more-tools-card:hover {
  border-color: rgba(63, 185, 80, 0.4);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}
.more-tools-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.more-tools-card div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.more-tools-card strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}
.more-tools-card span {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ===== Utility Classes ===== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.mt-2 { margin-top: 8px; }
.mb-2 { margin-bottom: 8px; }

/* ===== Scrollbar Styling ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ===== Focus Visible (keyboard navigation) ===== */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}
button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
  border-radius: 4px;
}