/* ========================================
   BMW Used Car Buying Guide - Styles
   ======================================== */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: #1c2128;
  --bg-card-hover: #252c35;
  --border-color: #30363d;
  --border-light: #3d444d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-blue: #0077cc;
  --accent-blue-light: #58a6ff;
  --accent-blue-bg: rgba(0, 119, 204, 0.15);
  --severity-critical: #ff4757;
  --severity-high: #ff7f50;
  --severity-medium: #ffc048;
  --severity-low: #4ecdc4;
  --wear-color: #9b59b6;
  --success: #2ecc71;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
  --sidebar-width: 280px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ========== HEADER ========== */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-content {
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.bmw-badge svg {
  display: block;
}

.logo-text h1 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo-text .subtitle {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.search-container {
  flex: 1;
  max-width: 520px;
  position: relative;
}

#global-search {
  width: 100%;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border var(--transition);
}

#global-search:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-bg);
}

#global-search::placeholder {
  color: var(--text-muted);
}

.search-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-top: 4px;
  max-height: 400px;
  overflow-y: auto;
  display: none;
  z-index: 1001;
  box-shadow: var(--shadow-lg);
}

.search-dropdown.active {
  display: block;
}

.search-item {
  padding: 10px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
}

.search-item:hover {
  background: var(--bg-tertiary);
}

.search-item:last-child {
  border-bottom: none;
}

.search-item .search-label {
  font-weight: 500;
  font-size: 0.9rem;
}

.search-item .search-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.header-actions { flex-shrink: 0; }

.btn-icon {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: background var(--transition);
}

.btn-icon:hover {
  background: var(--bg-card-hover);
}

/* ========== TOP NAV ========== */
.top-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  height: 44px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: 999;
  display: flex;
  align-items: center;
}

.top-nav-content {
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.nav-link.active {
  color: var(--accent-blue-light);
  background: var(--accent-blue-bg);
  border-color: rgba(88, 166, 255, 0.2);
}

.nav-link svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-link.active svg {
  opacity: 1;
}

/* ========== APP LAYOUT ========== */
.app-container {
  display: flex;
  margin-top: calc(var(--header-height) + 44px);
  min-height: calc(100vh - var(--header-height) - 44px);
}

/* ========== SIDEBAR ========== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 20px 16px;
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  overflow-y: auto;
  transition: transform 0.3s ease;
  z-index: 900;
}

.sidebar.hidden {
  transform: translateX(-100%);
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent-blue-light);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: var(--font-primary);
}

.btn-link:hover {
  text-decoration: underline;
}

.filter-group {
  margin-bottom: 16px;
}

.filter-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.filter-title::after {
  content: '▾';
  font-size: 0.7rem;
  transition: transform var(--transition);
}

.filter-title.collapsed::after {
  transform: rotate(-90deg);
}

.filter-body {
  padding: 4px 0;
}

.filter-body.collapsed {
  display: none;
}

.filter-check {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text-primary);
}

.filter-check input[type="checkbox"] {
  accent-color: var(--accent-blue);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.range-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
}

.range-input {
  width: 80px;
  padding: 6px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 0.85rem;
  text-align: center;
}

.range-sep {
  color: var(--text-muted);
}

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

.severity-dot.critical { background: var(--severity-critical); }
.severity-dot.high { background: var(--severity-high); }
.severity-dot.medium { background: var(--severity-medium); }
.severity-dot.low { background: var(--severity-low); }

/* ========== SORT OPTIONS ========== */
.sort-group {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.sort-options {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sort-radio {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text-primary);
  border-radius: 6px;
  transition: background var(--transition);
}

.sort-radio:hover {
  background: var(--bg-tertiary);
}

.sort-radio input[type="radio"] {
  accent-color: var(--accent-blue);
  width: 14px;
  height: 14px;
  cursor: pointer;
  margin: 0;
}

/* ========== MAIN CONTENT ========== */
.content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 24px 32px;
  max-width: calc(100% - var(--sidebar-width));
  transition: margin var(--transition);
}

.sidebar.hidden + .content {
  margin-left: 0;
  max-width: 100%;
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--accent-blue-light);
  text-decoration: none;
  cursor: pointer;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb .sep {
  color: var(--text-muted);
}

.breadcrumb .current {
  color: var(--text-secondary);
}

/* ========== SERIES GRID ========== */
.series-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.series-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.series-card .card-body {
  padding: 24px 28px 28px;
  position: relative;
}

.series-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-blue);
  opacity: 0;
  transition: opacity var(--transition);
}

.series-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.series-card:hover::before {
  opacity: 1;
}

.series-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.series-card .series-subtitle {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.series-card .gen-count {
  font-size: 0.8rem;
  color: var(--accent-blue-light);
  font-weight: 500;
}

.series-card .series-years {
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.series-card .quick-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.series-card .stat {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.series-card .stat strong {
  color: var(--text-primary);
  display: block;
  font-size: 1.1rem;
}

/* ========== GENERATION GRID ========== */
.generation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.gen-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0;
  cursor: pointer;
  transition: all var(--transition);
  overflow: hidden;
}

.gen-card .gen-card-header,
.gen-card .gen-years,
.gen-card .gen-facelift,
.gen-card .gen-bodies,
.gen-card .engine-list,
.gen-card .issue-summary,
.gen-card .reliability-meter {
  padding-left: 24px;
  padding-right: 24px;
  padding-bottom: 20px;
}

.gen-card .gen-card-header {
  padding-top: 20px;
}

.gen-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.gen-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.gen-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
}

.gen-card .chassis-code {
  font-size: 0.85rem;
  color: var(--accent-blue-light);
  font-weight: 600;
  background: var(--accent-blue-bg);
  padding: 2px 10px;
  border-radius: 20px;
}

.gen-card .gen-years {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.gen-card .gen-facelift {
  font-size: 0.8rem;
  color: var(--wear-color);
  margin-bottom: 12px;
}

.gen-card .gen-bodies {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.body-tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-secondary);
}

.gen-card .engine-list {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.gen-card .engine-list strong {
  color: var(--text-primary);
}

.gen-card .issue-summary {
  display: flex;
  gap: 12px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.issue-badge {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 600;
}

.issue-badge.critical {
  background: rgba(255, 71, 87, 0.15);
  color: var(--severity-critical);
}

.issue-badge.high {
  background: rgba(255, 127, 80, 0.15);
  color: var(--severity-high);
}

.issue-badge.medium {
  background: rgba(255, 192, 72, 0.15);
  color: var(--severity-medium);
}

.issue-badge.low {
  background: rgba(78, 205, 196, 0.15);
  color: var(--severity-low);
}

/* ========== DETAIL VIEW ========== */
.detail-header {
  margin-bottom: 28px;
}

.detail-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.detail-header .detail-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.detail-header .detail-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.meta-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.meta-item strong {
  color: var(--text-primary);
}

.detail-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.overview-stat {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.overview-stat .stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-blue-light);
}

.overview-stat .stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* Facelift Info */
.facelift-box {
  background: var(--bg-card);
  border: 1px solid var(--wear-color);
  border-left: 4px solid var(--wear-color);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.facelift-box h4 {
  color: var(--wear-color);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.facelift-box ul {
  list-style: none;
  padding: 0;
}

.facelift-box li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 3px 0;
  padding-left: 16px;
  position: relative;
}

.facelift-box li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--wear-color);
}

/* ========== TABS ========== */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 24px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: 12px 20px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.tab-btn.active {
  color: var(--accent-blue-light);
  border-bottom-color: var(--accent-blue);
  font-weight: 600;
}

.tab-count {
  font-size: 0.7rem;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  padding: 1px 6px;
  border-radius: 10px;
  margin-left: 6px;
}

.tab-btn.active .tab-count {
  background: var(--accent-blue-bg);
  color: var(--accent-blue-light);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ========== ENGINE/COMPONENT CARDS ========== */
.component-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 20px;
}

.component-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.component-card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.component-card-header h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.component-card-header .component-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.component-specs {
  padding: 16px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  border-bottom: 1px solid var(--border-color);
}

.spec-item {
  font-size: 0.82rem;
}

.spec-item .spec-label {
  color: var(--text-muted);
}

.spec-item .spec-value {
  color: var(--text-primary);
  font-weight: 500;
}

.component-card-body {
  padding: 0;
}

.section-divider {
  padding: 12px 24px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-divider .issue-count-label {
  font-weight: 400;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ========== ISSUE ITEMS ========== */
.issue-item {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
}

.issue-item:last-child {
  border-bottom: none;
}

.issue-item:hover {
  background: var(--bg-card-hover);
}

.issue-item-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
}

.issue-severity {
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  flex-shrink: 0;
  margin-top: 2px;
}

.issue-severity.critical {
  background: rgba(255, 71, 87, 0.2);
  color: var(--severity-critical);
  border: 1px solid rgba(255, 71, 87, 0.3);
}

.issue-severity.high {
  background: rgba(255, 127, 80, 0.2);
  color: var(--severity-high);
  border: 1px solid rgba(255, 127, 80, 0.3);
}

.issue-severity.medium {
  background: rgba(255, 192, 72, 0.2);
  color: var(--severity-medium);
  border: 1px solid rgba(255, 192, 72, 0.3);
}

.issue-severity.low {
  background: rgba(78, 205, 196, 0.2);
  color: var(--severity-low);
  border: 1px solid rgba(78, 205, 196, 0.3);
}

.issue-title {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.3;
}

.issue-freq {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 4px;
}

.issue-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 10px;
}

.issue-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.issue-detail-item {
  font-size: 0.78rem;
}

.issue-detail-item .detail-label {
  color: var(--text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.issue-detail-item .detail-value {
  color: var(--text-primary);
}

.issue-symptoms {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.symptom-tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-secondary);
}

/* ========== WEAR ITEMS ========== */
.wear-item {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
}

.wear-item:hover {
  background: var(--bg-card-hover);
}

.wear-item:last-child {
  border-bottom: none;
}

.wear-item-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.wear-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--wear-color);
  flex-shrink: 0;
}

.wear-title {
  font-size: 0.92rem;
  font-weight: 600;
}

.wear-interval {
  font-size: 0.78rem;
  color: var(--wear-color);
  font-weight: 500;
  margin-left: auto;
}

.wear-bar-container {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  margin: 8px 0;
  position: relative;
  overflow: hidden;
}

.wear-bar {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--success), var(--severity-medium), var(--severity-high), var(--severity-critical));
}

.wear-bar-markers {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.wear-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 8px;
}

.wear-info-item {
  font-size: 0.78rem;
}

.wear-info-item .wi-label {
  color: var(--text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.wear-info-item .wi-value {
  color: var(--text-primary);
}

/* ========== CHASSIS / SUSPENSION DETAIL ========== */
.system-section {
  margin-bottom: 28px;
}

.system-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.system-section h3 .section-badge {
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  padding: 3px 10px;
  border-radius: 10px;
  margin-left: 10px;
  color: var(--text-muted);
  vertical-align: middle;
}

.issues-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ========== FULL-WIDTH COMPONENT SECTION ========== */
.full-width-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
}

.full-width-section .section-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.full-width-section .section-header h4 {
  font-size: 1rem;
  font-weight: 700;
}

.full-width-section .section-header p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ========== VARIANT TABLE ========== */
.variant-table-container {
  overflow-x: auto;
}

.variant-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
}

.variant-table th {
  text-align: left;
  padding: 10px 16px;
  background: var(--bg-tertiary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.variant-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.variant-table tr:hover td {
  background: var(--bg-card-hover);
}

.variant-table .engine-link {
  color: var(--accent-blue-light);
  cursor: pointer;
  font-weight: 500;
}

.variant-table .engine-link:hover {
  text-decoration: underline;
}

/* ========== FOOTER ========== */
.main-footer {
  padding: 24px 32px;
  margin-left: var(--sidebar-width);
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.main-footer .disclaimer {
  margin-top: 8px;
  font-style: italic;
  color: var(--text-muted);
  opacity: 0.7;
}

/* ========== COLLAPSIBLE SECTIONS ========== */
.collapsible-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 12px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  user-select: none;
  transition: background var(--transition);
}

.collapsible-header:hover {
  background: var(--bg-tertiary);
}

.collapsible-header h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.collapsible-header .toggle-icon {
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.collapsible-header.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.collapsible-body {
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.collapsible-body.collapsed {
  display: none;
}

/* ========== ENGINE DETAIL VIEW ========== */
.engine-detail-hero {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0;
  margin-bottom: 24px;
  overflow: hidden;
}

.engine-detail-hero .engine-hero-top,
.engine-detail-hero .engine-summary,
.engine-detail-hero .engine-specs-grid,
.engine-detail-hero .engine-tech-section,
.engine-detail-hero .engine-apps-section {
  padding-left: 28px;
  padding-right: 28px;
}

.engine-detail-hero .engine-hero-top {
  padding-top: 28px;
}

.engine-detail-hero .engine-apps-section {
  padding-bottom: 28px;
}

.engine-detail-hero h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.engine-detail-hero .engine-full-name {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.engine-specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}

.engine-spec-box {
  text-align: center;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.engine-spec-box .esb-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-blue-light);
}

.engine-spec-box .esb-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* ========== MODELS USED IN ========== */
.models-used-in {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.model-tag {
  font-size: 0.78rem;
  padding: 4px 12px;
  background: var(--accent-blue-bg);
  border: 1px solid rgba(0, 119, 204, 0.3);
  border-radius: 16px;
  color: var(--accent-blue-light);
  cursor: pointer;
}

.model-tag:hover {
  background: rgba(0, 119, 204, 0.25);
}

/* ========== VIEW HEADER ========== */
.view-header {
  margin-bottom: 24px;
}

.view-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.view-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ========== NO RESULTS ========== */
.no-results {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.no-results h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.no-results p {
  font-size: 0.9rem;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* ========== BACK BUTTON ========== */
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 0.82rem;
  cursor: pointer;
  margin-bottom: 16px;
  transition: all var(--transition);
}

.btn-back:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* ========== FEATURES LIST ========== */
.features-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.feature-tag {
  font-size: 0.72rem;
  padding: 3px 10px;
  background: rgba(46, 204, 113, 0.1);
  border: 1px solid rgba(46, 204, 113, 0.2);
  border-radius: 12px;
  color: var(--success);
}

/* ========== RELIABILITY SCORE ========== */
.reliability-meter {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.reliability-bar {
  flex: 1;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.reliability-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

.reliability-fill.excellent { background: var(--success); }
.reliability-fill.good { background: #7ed957; }
.reliability-fill.average { background: var(--severity-medium); }
.reliability-fill.poor { background: var(--severity-high); }
.reliability-fill.bad { background: var(--severity-critical); }

.reliability-label {
  font-size: 0.78rem;
  font-weight: 600;
  min-width: 40px;
  text-align: right;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.visible {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .content {
    margin-left: 0;
    max-width: 100%;
  }

  .main-footer {
    margin-left: 0;
  }

  .component-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  html { font-size: 14px; }

  .header-content {
    padding: 0 16px;
    gap: 12px;
  }

  .logo-text h1 {
    font-size: 1rem;
  }

  .logo-text .subtitle {
    display: none;
  }

  .content {
    padding: 16px;
  }

  .series-grid,
  .generation-grid {
    grid-template-columns: 1fr;
  }

  .detail-header h2 {
    font-size: 1.4rem;
  }

  .tabs {
    gap: 0;
  }

  .tab-btn {
    padding: 10px 14px;
    font-size: 0.78rem;
  }

  .issue-details,
  .wear-info {
    grid-template-columns: 1fr;
  }

  .engine-specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .search-container {
    display: none;
  }

  .component-grid {
    grid-template-columns: 1fr;
  }

  .component-specs {
    grid-template-columns: 1fr;
  }

  .detail-overview {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

.series-card,
.gen-card,
.component-card,
.full-width-section {
  animation: fadeIn 0.3s ease forwards;
}

.series-card:nth-child(2) { animation-delay: 0.05s; }
.series-card:nth-child(3) { animation-delay: 0.1s; }
.series-card:nth-child(4) { animation-delay: 0.15s; }
.series-card:nth-child(5) { animation-delay: 0.2s; }
.series-card:nth-child(6) { animation-delay: 0.25s; }

.gen-card:nth-child(2) { animation-delay: 0.05s; }
.gen-card:nth-child(3) { animation-delay: 0.1s; }
.gen-card:nth-child(4) { animation-delay: 0.15s; }

/* ========== ENHANCED ENGINE PAGE ========== */
.engine-hero-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.engine-family-badge {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.engine-reliability-badge {
  text-align: center;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 2px solid var(--border-color);
  flex-shrink: 0;
  min-width: 100px;
}

.engine-reliability-badge.excellent { border-color: var(--success); }
.engine-reliability-badge.good { border-color: #7ed957; }
.engine-reliability-badge.average { border-color: var(--severity-medium); }
.engine-reliability-badge.poor { border-color: var(--severity-high); }
.engine-reliability-badge.bad { border-color: var(--severity-critical); }

.engine-reliability-badge .erb-value {
  font-size: 1.5rem;
  font-weight: 800;
}

.engine-reliability-badge.excellent .erb-value { color: var(--success); }
.engine-reliability-badge.good .erb-value { color: #7ed957; }
.engine-reliability-badge.average .erb-value { color: var(--severity-medium); }
.engine-reliability-badge.poor .erb-value { color: var(--severity-high); }
.engine-reliability-badge.bad .erb-value { color: var(--severity-critical); }

.engine-reliability-badge .erb-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

.engine-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent-blue);
}

.engine-tech-section {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.engine-tech-header {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 24px 12px;
}

.component-card .tech-tags {
  padding: 8px 24px;
  border-bottom: 1px solid var(--border-color);
}

.tech-tag {
  font-size: 0.72rem;
  padding: 3px 10px;
  background: rgba(88, 166, 255, 0.1);
  border: 1px solid rgba(88, 166, 255, 0.2);
  border-radius: 12px;
  color: var(--accent-blue-light);
}

.engine-tech-detail {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  font-size: 0.82rem;
}

.engine-tech-detail .etd-label {
  color: var(--text-muted);
  min-width: 100px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.engine-tech-detail .etd-value {
  color: var(--text-primary);
}

.engine-apps-section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.model-tag.current {
  background: rgba(0, 119, 204, 0.3);
  border-color: var(--accent-blue);
  font-weight: 600;
}

.model-tag-sub {
  font-size: 0.68rem;
  color: var(--text-muted);
  display: block;
  margin-top: 1px;
}

/* Engine Applications Grid */
.engine-apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.engine-app-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: all var(--transition);
  animation: fadeIn 0.3s ease forwards;
}

.engine-app-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.engine-app-card.current-app {
  border-color: var(--accent-blue);
  border-width: 2px;
}

.engine-app-card.current-app::after {
  content: 'Current';
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 0.65rem;
  padding: 2px 8px;
  background: var(--accent-blue-bg);
  color: var(--accent-blue-light);
  border-radius: 10px;
  font-weight: 600;
}

.engine-app-card {
  position: relative;
}

.eac-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
}

.eac-header h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

.eac-years {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.eac-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.eac-detail {
  font-size: 0.78rem;
}

.eac-detail .eac-label {
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.eac-detail .eac-value {
  color: var(--text-primary);
}

.eac-notes {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(255, 192, 72, 0.08);
  border: 1px solid rgba(255, 192, 72, 0.2);
  border-radius: var(--radius);
  font-size: 0.78rem;
  color: var(--severity-medium);
}

.eac-car-issues {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
}

.eac-issues-header {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.eac-issue-mini {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-size: 0.78rem;
}

/* Transmission Specs */
.trans-specs {
  padding: 12px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  border-top: 1px solid var(--border-color);
}

.trans-spec-item {
  font-size: 0.82rem;
}

.trans-spec-item .ts-label {
  color: var(--text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.trans-spec-item .ts-value {
  color: var(--text-primary);
}

/* Engine Link Styling in Cards */
.engine-link {
  color: var(--accent-blue-light);
  cursor: pointer;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.engine-link:hover {
  text-decoration: underline;
  color: #79bcff;
}

/* Related Engine Cards */
.related-engine-card {
  border-style: dashed;
}

.related-engine-card:hover {
  border-style: solid;
}

/* Responsive for engine page */
@media (max-width: 768px) {
  .engine-hero-top {
    flex-direction: column;
  }

  .engine-reliability-badge {
    align-self: flex-start;
  }

  .engine-apps-grid {
    grid-template-columns: 1fr;
  }

  .eac-details {
    grid-template-columns: 1fr;
  }

  .trans-specs {
    grid-template-columns: 1fr;
  }
}

/* ========== IMAGE STYLES ========== */

/* Card images (series grid & generation grid) */
.card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
  position: relative;
  background: var(--bg-tertiary);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.series-card:hover .card-image img,
.gen-card:hover .card-image img {
  transform: scale(1.05);
}

/* Detail hero image */
.detail-hero-image {
  width: 100%;
  height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
  position: relative;
  background: var(--bg-tertiary);
}

.detail-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(transparent, var(--bg-primary));
}

/* Engine hero image */
.engine-hero-image {
  width: 100%;
  height: 260px;
  overflow: hidden;
  position: relative;
  background: var(--bg-tertiary);
}

.engine-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Transmission hero image */
.trans-hero-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.trans-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Responsive image adjustments */
@media (max-width: 768px) {
  .card-image {
    height: 150px;
  }

  .detail-hero-image {
    height: 200px;
  }

  .engine-hero-image {
    height: 180px;
  }

  .trans-hero-image {
    height: 150px;
  }
}

/* ========== CAROUSEL ========== */
.carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.carousel.card-carousel {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  height: 200px;
}

.carousel.detail-carousel {
  border-radius: var(--radius-lg);
  height: 320px;
  margin-bottom: 0;
}

.carousel.engine-carousel {
  height: 260px;
}

.carousel.trans-carousel {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  height: 200px;
}

.carousel-track {
  display: flex;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.carousel-slide {
  min-width: 100%;
  height: 100%;
  position: relative;
  flex-shrink: 0;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  backdrop-filter: blur(4px);
}

.carousel:hover .carousel-btn {
  opacity: 1;
}

.carousel-btn:hover {
  background: rgba(0, 0, 0, 0.8);
}

.carousel-btn.prev { left: 10px; }
.carousel-btn.next { right: 10px; }

.carousel-dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 10;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  padding: 0;
}

.carousel-dot.active {
  background: #fff;
  transform: scale(1.25);
}

/* ========== OVERVIEW PAGES ========== */
.overview-page {
  padding-bottom: 40px;
}

.overview-page .view-header {
  margin-bottom: 24px;
}

/* Overview stats row */
.overview-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.overview-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  text-align: center;
}

.overview-stat-card .osc-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-blue-light);
}

.overview-stat-card .osc-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* Overview filter row */
.overview-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.overview-filter-btn {
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.overview-filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.overview-filter-btn.active {
  background: var(--accent-blue-bg);
  color: var(--accent-blue-light);
  border-color: rgba(88, 166, 255, 0.3);
}

/* Overview grid for engines/transmissions */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.overview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0;
  transition: all var(--transition);
  cursor: pointer;
  overflow: hidden;
}

.overview-card:hover {
  border-color: var(--accent-blue);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.overview-card-image {
  width: 100%;
  height: 140px;
  overflow: hidden;
  background: var(--bg-tertiary);
}

.overview-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.overview-card-body {
  padding: 16px 20px;
}

.overview-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.overview-card-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.overview-card-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 16px;
  margin-bottom: 12px;
}

.overview-card-spec {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
}

.overview-card-spec .ocs-label {
  color: var(--text-muted);
}

.overview-card-spec .ocs-value {
  color: var(--text-primary);
  font-weight: 500;
}

.overview-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 10px;
}

.overview-card-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.overview-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.1);
}

.overview-card-footer .ocf-issues {
  display: flex;
  gap: 6px;
}

.overview-card-footer .ocf-reliability {
  font-size: 0.8rem;
  font-weight: 600;
}

/* Issues overview */
.issues-overview-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.issues-overview-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 14px 20px;
  transition: all var(--transition);
  cursor: pointer;
}

.issues-overview-item:hover {
  border-color: var(--accent-blue);
  background: var(--bg-card-hover);
}

.issues-overview-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.issues-overview-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.issues-overview-source {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-left: auto;
}

.issues-overview-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.issues-overview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.issues-overview-meta strong {
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .top-nav-content {
    padding: 0 12px;
    gap: 2px;
    overflow-x: auto;
  }
  .nav-link {
    padding: 6px 10px;
    font-size: 0.78rem;
  }
  .overview-grid {
    grid-template-columns: 1fr;
  }
  .overview-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.carousel-counter {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.7rem;
  z-index: 10;
  backdrop-filter: blur(4px);
  letter-spacing: 0.05em;
}

/* Single image carousel - no controls */
.carousel.single-image .carousel-btn,
.carousel.single-image .carousel-dots,
.carousel.single-image .carousel-counter {
  display: none;
}

/* Detail page carousel overlay gradient */
.carousel.detail-carousel::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(transparent, var(--bg-primary));
  pointer-events: none;
  z-index: 5;
}

@media (max-width: 768px) {
  .carousel.card-carousel {
    height: 150px;
  }
  .carousel.detail-carousel {
    height: 200px;
  }
  .carousel.engine-carousel {
    height: 180px;
  }
  .carousel.trans-carousel {
    height: 150px;
  }
  .carousel-btn {
    width: 30px;
    height: 30px;
    font-size: 1rem;
    opacity: 1;
  }
  .carousel-dot {
    width: 6px;
    height: 6px;
  }
}