@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
  --theme-first-color: #363945;
  --theme-first-color-light: rgba(54, 57, 69, 0.12);
  --theme-first-color-muted: rgba(54, 57, 69, 0.65);
  --theme-second-color: #EFE1CE;
  --theme-second-color-hover: #e5d3ba;
  
  --bg-primary: #F7F8FA;
  --bg-primary-blur: rgba(247, 248, 250, 0.85);
  --bg-surface: #FFFFFF;
  --bg-surface-blur: rgba(255, 255, 255, 0.85);
  --text-primary: #363945;
  --text-secondary: #64748B;
  --border-color: #E2E8F0;
  
  --card-bg: #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(54, 57, 69, 0.06);
  --shadow-md: 0 6px 18px rgba(54, 57, 69, 0.1);
  --shadow-hover: 0 10px 28px rgba(54, 57, 69, 0.16);

  --accent-pdf: #D97706;
  --accent-map: #059669;
  --accent-doc: #2563EB;
  --accent-flowchart: #4F46E5;
  --accent-video: #DC2626;
  --accent-demo: #7C3AED;
  --accent-tool: #0891B2;
  --accent-trainer: #D946EF;

  --accent-bg-pdf: #FFFBEB;
  --accent-bg-map: #ECFDF5;
  --accent-bg-doc: #EFF6FF;
  --accent-bg-flowchart: #EEF2FF;
  --accent-bg-video: #FEF2F2;
  --accent-bg-demo: #F5F3FF;
  --accent-bg-tool: #ECFEFF;
  --accent-bg-trainer: #FDF4FF;
  
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 73px;
  --domain-header-height: 48px;
  --sticky-gap: 12px;
}

:root:has(.header-shrunk),
body:has(.header-shrunk) {
  --header-height: 53px;
}

[data-theme="dark"] {
  --bg-primary: #18191E;
  --bg-primary-blur: rgba(24, 25, 30, 0.85);
  --bg-surface: #22242D;
  --bg-surface-blur: rgba(34, 36, 45, 0.85);
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --border-color: #333745;
  
  --card-bg: #22242D;
  --theme-first-color-light: rgba(239, 225, 206, 0.15);
  --theme-first-color-muted: rgba(241, 245, 249, 0.7);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 10px 28px rgba(0, 0, 0, 0.5);

  --accent-flowchart: #818CF8;
  --accent-demo: #C4B5FD;
  --accent-tool: #67E8F9;
  --accent-trainer: #F0ABFC;
  --accent-bg-pdf: rgba(217, 119, 6, 0.15);
  --accent-bg-map: rgba(5, 150, 105, 0.15);
  --accent-bg-doc: rgba(37, 99, 235, 0.15);
  --accent-bg-flowchart: rgba(79, 70, 229, 0.18);
  --accent-bg-video: rgba(220, 38, 38, 0.15);
  --accent-bg-demo: rgba(124, 58, 237, 0.18);
  --accent-bg-tool: rgba(8, 145, 178, 0.18);
  --accent-bg-trainer: rgba(217, 70, 239, 0.18);
}

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

body, html {
  min-height: 100%;
  width: 100%;
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: clip;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* Header & Navigation */
header {
  background-color: var(--bg-surface-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
  transition: padding var(--transition-fast);
}

/* Shrunk / Compact Header state */
header.header-shrunk .header-container {
  padding: 6px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

header.header-shrunk .brand-text {
  display: none;
}

/* Center 'Back to top' button in shrunk header */
.header-top-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.85);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

header.header-shrunk .header-top-btn {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--theme-second-color);
  color: var(--theme-first-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), width var(--transition-fast), height var(--transition-fast);
}

.brand:hover .brand-icon {
  background: var(--theme-first-color);
  color: var(--theme-second-color);
  border-color: var(--theme-first-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
}

#themeToggleBtn,
.header-top-btn {
  background-color: var(--theme-second-color);
  color: var(--theme-first-color);
  border-color: var(--border-color);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

#themeToggleBtn:hover,
.header-top-btn:hover {
  background-color: var(--theme-first-color);
  color: var(--theme-second-color);
  border-color: var(--theme-first-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
}

[data-theme="dark"] .brand:hover .brand-icon,
[data-theme="dark"] #themeToggleBtn:hover,
[data-theme="dark"] .header-top-btn:hover {
  border-color: var(--theme-second-color);
  box-shadow: 0 2px 14px rgba(239, 225, 206, 0.35);
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:hover {
  background-color: var(--theme-first-color-light);
  border-color: var(--theme-first-color-muted);
}

.btn-primary {
  background-color: var(--theme-first-color);
  color: var(--theme-second-color);
  border: none;
}

.btn-primary:hover {
  background-color: #272a33;
  color: #FFF;
}

.btn-icon-only {
  padding: 8px;
  border-radius: 50%;
  width: 38px;
  height: 38px;
}

/* Controls Bar */
.controls-bar {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 24px 12px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.search-row {
  display: flex;
  gap: 12px;
  align-items: center;
  width: 100%;
}

.search-box {
  position: relative;
  flex: 1;
}

.search-box input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--theme-first-color);
  box-shadow: 0 0 0 3px var(--theme-first-color-light);
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  width: 18px;
  height: 18px;
}

.view-toggle {
  display: flex;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px;
  gap: 4px;
}

.toggle-btn {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background-color: var(--theme-first-color);
  color: var(--theme-second-color);
}

/* Filter Groups & Rows */
.filter-group {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.filter-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  width: 60px;
  min-width: 60px;
  flex-shrink: 0;
  align-self: center;
  text-align: left;
}

.chips-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.chip-all {
  flex-shrink: 0;
  align-self: center;
}

.chips-wrap-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.chip {
  padding: 6px 13px;
  border-radius: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
  box-sizing: border-box;
  line-height: 1.2;
}

.chip:hover:not(:disabled):not(.is-disabled) {
  border-color: var(--theme-first-color);
  color: var(--text-primary);
  background-color: var(--theme-first-color-light);
}

.chip.active {
  background-color: var(--theme-first-color);
  color: var(--theme-second-color);
  border-color: var(--theme-first-color);
  font-weight: 500;
}

.chip.active:hover:not(:disabled):not(.is-disabled) {
  background-color: #272a33;
  border-color: #272a33;
  color: #FFFFFF;
}

.chip.active .chip-count {
  background: rgba(239, 225, 206, 0.25);
  color: var(--theme-second-color);
}

.chip.active-outline:not(:disabled):not(.is-disabled) {
  border-color: var(--theme-second-color);
  background-color: transparent;
  color: var(--text-primary);
  font-weight: 500;
}

.chip.active-outline:hover:not(:disabled):not(.is-disabled) {
  border-color: var(--theme-first-color);
  background-color: rgba(239, 225, 206, 0.35);
  color: var(--text-primary);
}

.chip.active-outline:not(:disabled):not(.is-disabled) .chip-count {
  background: rgba(239, 225, 206, 0.4);
  color: var(--text-primary);
}

.chip.active-outline:hover:not(:disabled):not(.is-disabled) .chip-count {
  background: rgba(239, 225, 206, 0.7);
}

[data-theme="dark"] .chip.active:hover:not(:disabled):not(.is-disabled) {
  background-color: #434756;
  border-color: #434756;
  color: #FFFFFF;
}

[data-theme="dark"] .chip.active-outline:not(:disabled):not(.is-disabled) {
  border-color: var(--theme-second-color);
  background-color: transparent;
  color: var(--text-primary);
}

[data-theme="dark"] .chip.active-outline:hover:not(:disabled):not(.is-disabled) {
  border-color: var(--theme-second-color-hover);
  background-color: rgba(239, 225, 206, 0.14);
  color: #FFFFFF;
}

[data-theme="dark"] .chip.active-outline:not(:disabled):not(.is-disabled) .chip-count {
  background: rgba(239, 225, 206, 0.15);
  color: var(--theme-second-color);
}

[data-theme="dark"] .chip.active-outline:hover:not(:disabled):not(.is-disabled) .chip-count {
  background: rgba(239, 225, 206, 0.25);
}

.chip:disabled,
.chip.is-disabled {
  opacity: 0.38;
  cursor: not-allowed;
  pointer-events: none;
  background-color: var(--bg-primary);
  border-color: var(--border-color);
  color: var(--text-secondary);
}

.chip:disabled .chip-count,
.chip.is-disabled .chip-count {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-secondary);
}

[data-theme="dark"] .chip:disabled,
[data-theme="dark"] .chip.is-disabled {
  background-color: rgba(255, 255, 255, 0.03);
  border-color: var(--border-color);
  opacity: 0.3;
}

[data-theme="dark"] .chip:disabled .chip-count,
[data-theme="dark"] .chip.is-disabled .chip-count {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

.chip-domain {
  font-weight: 500;
}

.chip-count {
  background: rgba(54, 57, 69, 0.1);
  padding: 2px 6px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  min-width: 18px;
  text-align: center;
  box-sizing: border-box;
}

[data-theme="dark"] .chip-count {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-secondary);
}

[data-theme="dark"] .chip.active .chip-count {
  background: rgba(0, 0, 0, 0.3);
  color: var(--theme-second-color);
}

/* Main Container */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 24px 48px 24px;
  min-height: calc(100vh - 220px);
}

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

/* Domain Section */
.domain-section {
  margin-bottom: 44px;
}

.domain-header {
  position: sticky;
  top: var(--header-height, 73px);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px 10px 18px;
  background-color: var(--bg-surface-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: border-radius var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-sizing: border-box;
}

.domain-header.is-stickied {
  border-radius: 0;
  border-left-color: transparent;
  border-right-color: transparent;
  box-shadow: var(--shadow-md);
}

/* Full window width frosted wings */
.domain-header::after {
  content: "";
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: 0;
  right: 0;
  background-color: var(--bg-surface-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  transition: left var(--transition-fast), right var(--transition-fast), opacity var(--transition-fast);
}

.domain-header.is-stickied::after {
  opacity: 1;
  left: calc(50% - 50vw);
  right: calc(50% - 50vw);
}

.domain-header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  box-sizing: border-box;
}

.domain-header::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--theme-first-color);
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
  transition: border-radius var(--transition-fast), left var(--transition-fast);
  z-index: 2;
}

.domain-header.is-stickied::before {
  border-radius: 0;
  left: calc(50% - 50vw);
}

.domain-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.2px;
  white-space: nowrap;
}

.domain-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--theme-first-color-light);
  color: var(--theme-first-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
  flex-shrink: 0;
}

[data-theme="dark"] .domain-badge {
  color: var(--theme-second-color);
  background: rgba(239, 225, 206, 0.15);
}

.topic-group {
  margin-bottom: 28px;
}

.topic-title {
  position: sticky;
  top: calc(var(--header-height, 73px) + var(--domain-header-height, 46px));
  z-index: 25;
  background-color: var(--bg-primary-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 0;
  margin-bottom: 14px;
  padding-top: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--theme-first-color-light);
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 6px -4px rgba(0, 0, 0, 0.08);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

/* Indent card sub-rows for clear hierarchy under topic titles */
.subrow-group {
  margin-bottom: 20px;
  padding-left: 18px;
  border-left: 3px solid var(--theme-first-color-light);
}

.subrow-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, opacity 3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

/* Persistent Highlight Effect on Targeted Card */
.card-persistent-highlight {
  box-shadow: 0 0 0 4px var(--theme-second-color), 0 0 24px rgba(217, 119, 6, 0.45) !important;
  border-color: #D97706 !important;
  z-index: 10 !important;
  transition: box-shadow 0.4s ease, border-color 0.4s ease, opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* Dim all non-targeted cards when a card is selected/highlighted */
body.has-card-highlight .card:not(.card-persistent-highlight),
body.has-card-highlight .tree-item:not(.card-persistent-highlight),
.has-card-highlight .card:not(.card-persistent-highlight),
.has-card-highlight .tree-item:not(.card-persistent-highlight) {
  opacity: 0.25 !important;
  transition: opacity 0.4s ease !important;
}

body.has-card-highlight .card.card-persistent-highlight,
body.has-card-highlight .tree-item.card-persistent-highlight,
.has-card-highlight .card.card-persistent-highlight,
.has-card-highlight .tree-item.card-persistent-highlight {
  opacity: 1 !important;
  z-index: 10 !important;
}

/* Toast Container & Notification */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast-notification {
  background-color: var(--theme-first-color);
  color: var(--theme-second-color);
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(12px);
  animation: toastFadeInOut 3s ease forwards;
}

@keyframes toastFadeInOut {
  0% { opacity: 0; transform: translateY(12px); }
  15% { opacity: 1; transform: translateY(0); }
  85% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-8px); }
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--theme-first-color-light);
}

.card:hover:has(.badge-pdf),
.card:has(.badge-pdf):hover {
  border-color: var(--accent-pdf);
}

.card:hover:has(.badge-video),
.card:has(.badge-video):hover {
  border-color: var(--accent-video);
}

.card:hover:has(.badge-demo),
.card:has(.badge-demo):hover {
  border-color: var(--accent-demo);
}

.card:hover:has(.badge-tool),
.card:has(.badge-tool):hover {
  border-color: var(--accent-tool);
}

.card:hover:has(.badge-trainer),
.card:has(.badge-trainer):hover {
  border-color: var(--accent-trainer);
}

.card:hover:has(.badge-map),
.card:has(.badge-map):hover {
  border-color: var(--accent-map);
}

.card:hover:has(.badge-doc),
.card:has(.badge-doc):hover {
  border-color: var(--accent-doc);
}

.card:hover:has(.badge-flowchart),
.card:has(.badge-flowchart):hover {
  border-color: var(--accent-flowchart);
}

/* Hovering over card or tree-item highlights preview button */
.card:hover .btn-preview,
.tree-item:hover .btn-preview {
  background-color: var(--theme-first-color-light);
  border-color: var(--theme-first-color-muted);
}

/* When directly hovering over the open button, reset preview button to non-hover state */
.card:has(.btn-open:hover) .btn-preview,
.tree-item:has(.btn-open:hover) .btn-preview {
  background-color: var(--bg-surface);
  border-color: var(--border-color);
}

/* Direct hover over open button */
.btn-open:hover {
  background-color: var(--theme-first-color-light) !important;
  border-color: var(--theme-first-color-muted) !important;
}

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

.card-badge {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.badge-pdf {
  background-color: var(--accent-bg-pdf);
  color: var(--accent-pdf);
}

.badge-video {
  background-color: var(--accent-bg-video);
  color: var(--accent-video);
}

.badge-demo {
  background-color: var(--accent-bg-demo);
  color: var(--accent-demo);
}

[data-theme="dark"] .badge-demo {
  color: #C4B5FD;
}

.badge-tool {
  background-color: var(--accent-bg-tool);
  color: var(--accent-tool);
}

[data-theme="dark"] .badge-tool {
  color: #67E8F9;
}

.badge-trainer {
  background-color: var(--accent-bg-trainer);
  color: var(--accent-trainer);
}

[data-theme="dark"] .badge-trainer {
  color: #F0ABFC;
}

.badge-map {
  background-color: var(--accent-bg-map);
  color: var(--accent-map);
}

.badge-doc {
  background-color: var(--accent-bg-doc);
  color: var(--accent-doc);
}

.badge-flowchart {
  background-color: var(--accent-bg-flowchart);
  color: var(--accent-flowchart);
}

.card-category {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.35;
  word-break: break-word;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 12px;
  margin-bottom: 16px;
}

.card-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  width: 100%;
}

.card-actions .btn-preview,
.card-actions .btn-open {
  flex: 1 1 0px;
  justify-content: center;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  box-sizing: border-box;
}

.card-actions .btn-share {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

.btn-share:hover {
  background-color: var(--theme-first-color-light) !important;
  border-color: var(--theme-first-color-muted) !important;
}

/* Reset preview hover state when hovering open or share buttons */
.card:has(.btn-open:hover) .btn-preview,
.card:has(.btn-share:hover) .btn-preview,
.tree-item:has(.btn-open:hover) .btn-preview,
.tree-item:has(.btn-share:hover) .btn-preview {
  background-color: var(--bg-surface);
  border-color: var(--border-color);
}

/* Tree View */
.tree-view {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.tree-folder {
  margin-bottom: 12px;
}

.tree-folder-title {
  position: sticky;
  top: var(--header-height, 73px);
  z-index: 20;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 8px 12px;
  background-color: var(--bg-surface-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  box-shadow: var(--shadow-sm);
  transition: border-radius var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.tree-folder-title.is-stickied {
  border-radius: 0;
  box-shadow: var(--shadow-md);
}

.tree-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), opacity 3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  color: var(--text-primary);
  border-bottom: 1px dashed var(--border-color);
  cursor: pointer;
}

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

.tree-item:hover {
  background-color: var(--theme-first-color-light);
}

.tree-item-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tree-item-name {
  font-size: 0.9rem;
  font-weight: 500;
}

.tree-item-actions {
  display: flex;
  gap: 6px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* Modal Open Lock */
html.modal-open,
body.modal-open {
  overflow: hidden !important;
  overscroll-behavior: contain !important;
}

/* Modal Drawer Preview */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  overscroll-behavior: contain;
  touch-action: none;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  width: 92vw;
  height: 92vh;
  max-width: 1400px;
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  overscroll-behavior: contain;
  transform: scale(0.96);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.active .modal-container {
  transform: scale(1);
}

.modal-header {
  padding: 12px 20px;
  background-color: var(--theme-first-color);
  color: var(--theme-second-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 70%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.modal-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-body {
  flex: 1;
  width: 100%;
  height: 100%;
  background-color: #FFFFFF;
  position: relative;
}

.modal-body iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Footer */
footer {
  text-align: center;
  padding: 24px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

/* Responsive design */
@media (max-width: 768px) {
  :root {
    --header-height: 65px;
    --domain-header-height: 40px;
  }
  .header-container {
    padding: 12px 16px;
  }
  header.header-shrunk .header-container {
    padding: 6px 16px;
  }
  .domain-header {
    padding: 8px 12px 8px 14px;
    gap: 8px;
    margin-bottom: 12px;
  }
  .domain-header-inner {
    width: 100%;
    padding: 0;
    gap: 8px;
  }
  .domain-title {
    font-size: 0.95rem;
    gap: 6px;
  }
  .domain-title svg {
    width: 18px;
    height: 18px;
  }
  .domain-badge {
    font-size: 0.68rem;
    padding: 2px 8px;
  }
  .topic-title {
    font-size: 0.95rem;
    padding-top: 8px;
    padding-bottom: 6px;
    margin-bottom: 10px;
  }
  .controls-bar {
    padding: 16px;
  }
  main {
    padding: 12px 16px 32px 16px;
  }
  .search-row {
    flex-direction: column;
  }
  .view-toggle {
    width: 100%;
    justify-content: center;
  }
  .grid-view {
    grid-template-columns: 1fr;
  }
  .filter-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .filter-label {
    width: 100%;
    text-align: left;
  }
  .chips-row {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 100%;
  }
  .chip-all {
    align-self: center;
  }
  .chips-wrap-group {
    justify-content: center;
    width: 100%;
  }
  .modal-container {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }
}