:root {
  /* Light theme (default) - matching dmv_tool */
  --surface: #ffffff;
  --surface-alt: #f8f9fa;
  --border: #bdc3c7;
  --text: #2c3e50;
  --text-dim: #7f8c8d;
  --accent: #3498db;
  --accent-dim: #2980b9;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);

  /* Diff status colors - light mode */
  --added-bg: #dafbe1;
  --added-border: #27ae60;
  --added-text: #1a7f37;
  --removed-bg: #ffebe9;
  --removed-border: #e74c3c;
  --removed-text: #cf222e;
  --modified-bg: #fbefff;
  --modified-border: #8957e5;
  --modified-text: #6f42c1;
  --norev-bg: #fff8e1;
  --norev-border: #d29922;
  --norev-text: #9a6700;
  --unchanged-text: #8b949e;
}

/* Dark theme */
html[data-theme="dark"] {
  --surface: #161b22;
  --surface-alt: #1c2129;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);

  --added-bg: #12261e;
  --added-border: #238636;
  --added-text: #3fb950;
  --removed-bg: #2d1215;
  --removed-border: #da3633;
  --removed-text: #f85149;
  --modified-bg: #1c1d26;
  --modified-border: #8957e5;
  --modified-text: #bc8cff;
  --norev-bg: #1a1c1e;
  --norev-border: #d29922;
  --norev-text: #e3b341;
  --unchanged-text: #484f58;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: var(--text);
  line-height: 1.6;
}

html[data-theme="dark"] body {
  background: #0d1117;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

/* Header - card style matching dmv_tool */
.header {
  text-align: center;
  margin-bottom: 30px;
  padding: 40px 30px 30px;
  background: var(--surface);
  border-radius: 15px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, #3498db, #27ae60, #e6b422, #8e44ad);
}

.header h1 {
  font-size: 2.2em;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.header-subtitle {
  font-size: 1.1em;
  color: var(--text-dim);
  font-weight: 400;
  margin-bottom: 20px;
}

/* Theme Toggle */
.theme-toggle {
  position: absolute;
  top: 15px;
  right: 15px;
  background: var(--surface-alt);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 1.2em;
  color: var(--text);
  transition: all 0.3s ease;
  z-index: 10;
  line-height: 1;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.1);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: center;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.control-group label {
  font-size: 13px;
  color: var(--text-dim);
  font-weight: 500;
}

select, input[type="text"] {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

select:focus, input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(52,152,219,0.15);
}

html[data-theme="dark"] select:focus,
html[data-theme="dark"] input[type="text"]:focus {
  box-shadow: 0 0 0 2px rgba(88,166,255,0.2);
}

input[type="text"] { width: 220px; }

.btn {
  background: var(--accent-dim);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn:hover { background: var(--accent); transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.swap-btn {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.15s;
}
.swap-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Main content - card style matching dmv_tool */
.main-content {
  background: var(--surface);
  border-radius: 15px;
  box-shadow: var(--shadow);
  padding: 30px;
  overflow: hidden;
}

.summary {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.summary-card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 20px;
  min-width: 140px;
}

.summary-card .count {
  font-size: 28px;
  font-weight: 700;
}

.summary-card .label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.summary-card.added .count { color: var(--added-text); }
.summary-card.removed .count { color: var(--removed-text); }
.summary-card.modified .count { color: var(--modified-text); }
.summary-card.unchanged .count { color: var(--unchanged-text); }

.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: inherit;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab .badge {
  font-size: 11px;
  background: var(--border);
  color: var(--text-dim);
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 6px;
}

.diff-section {
  margin-bottom: 16px;
}

.diff-group-title {
  font-size: 15px;
  font-weight: 600;
  padding: 8px 0;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.diff-group-title .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.diff-group-title .dot.added-dot { background: var(--added-text); }
.diff-group-title .dot.removed-dot { background: var(--removed-text); }
.diff-group-title .dot.modified-dot { background: var(--modified-text); }
.diff-group-title .dot.norev-dot { background: var(--norev-text); }

.diff-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  overflow: hidden;
}

.diff-card.added-card { border-left: 3px solid var(--added-border); }
.diff-card.removed-card { border-left: 3px solid var(--removed-border); }
.diff-card.modified-card { border-left: 3px solid var(--modified-border); }
.diff-card.norev-card { border-left: 3px solid var(--norev-border); background: var(--norev-bg); }

.badge-norev { background: rgba(210,153,34,0.1); color: var(--norev-text); border: 1px solid var(--norev-border); }

.diff-card-header {
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: background 0.15s;
}

.diff-card-header:hover { background: var(--surface-alt); }

.diff-card-header .name {
  font-weight: 600;
  font-size: 14px;
}

.diff-card-header .meta {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  gap: 12px;
  align-items: center;
}

.diff-card-header .badge-sm {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.badge-added { background: var(--added-bg); color: var(--added-text); border: 1px solid var(--added-border); }
.badge-removed { background: var(--removed-bg); color: var(--removed-text); border: 1px solid var(--removed-border); }
.badge-modified { background: var(--modified-bg); color: var(--modified-text); border: 1px solid var(--modified-border); }

.diff-card-header .chevron {
  transition: transform 0.2s;
  color: var(--text-dim);
  font-size: 12px;
}

.diff-card.expanded .chevron { transform: rotate(90deg); }

.diff-card-body {
  display: none;
  padding: 0 16px 14px;
  border-top: 1px solid var(--border);
}

.diff-card.expanded .diff-card-body { display: block; }

.detail-section {
  margin-top: 12px;
}

.detail-section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  table-layout: fixed;
}

.detail-table th {
  text-align: left;
  padding: 6px 8px;
  font-weight: 500;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.detail-table td {
  padding: 5px 8px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  word-break: break-word;
}

.detail-table tr.row-added td { background: var(--added-bg); }
.detail-table tr.row-removed td { background: var(--removed-bg); }
.detail-table tr.row-modified td { background: var(--modified-bg); }

.val-old {
  color: var(--removed-text);
  text-decoration: line-through;
  margin-right: 6px;
}

.val-new { color: var(--added-text); }

.arrow { color: var(--text-dim); margin: 0 4px; }

.kv-change {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-size: 13px;
}

.kv-change .kv-key {
  color: var(--text-dim);
  min-width: 100px;
  font-weight: 500;
}

.loading {
  text-align: center;
  padding: 60px;
  color: var(--text-dim);
}

.loading .spinner {
  display: inline-block;
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-bottom: 12px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
  text-align: center;
  padding: 60px;
  color: var(--text-dim);
  font-size: 15px;
}

.expand-all-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  margin-bottom: 12px;
  font-family: inherit;
}
.expand-all-btn:hover { color: var(--text); border-color: var(--accent); }

.search-info {
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-info.focused {
  background: rgba(52,152,219,0.08);
  border: 1px solid rgba(52,152,219,0.25);
  color: var(--accent);
}

.search-info.broad {
  background: rgba(210,153,34,0.08);
  border: 1px solid rgba(210,153,34,0.25);
  color: var(--norev-text);
}

.search-info .info-icon { font-weight: 700; font-size: 14px; }

#initOverlay {
  position: fixed; inset: 0;
  background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; flex-direction: column; gap: 16px;
}
#initOverlay .spinner { width: 40px; height: 40px; border: 4px solid var(--border); border-top: 4px solid var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; }
#initOverlay .init-text { color: var(--text-dim); font-size: 15px; }

/* Footer - matching dmv_tool */
.footer {
  margin-top: 32px;
  padding: 24px 20px 28px;
  text-align: center;
  background: var(--surface);
  border-radius: 15px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-logo img {
  width: 28px;
  height: 28px;
}

.footer-logo span {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px 20px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-copy {
  margin: 0;
  font-size: 13px;
  color: var(--text-dim);
}

@media (max-width: 768px) {
  .controls { flex-direction: column; align-items: stretch; }
  .control-group { flex-wrap: wrap; }
  input[type="text"] { width: 100%; }
  .header h1 { font-size: 1.6em; }
  .header { padding: 30px 15px 20px; }
  .main-content { padding: 15px; }
}