/* =============================================
   Repository of PROMs — Design Tokens
   Colors: White, Dark Blue (#000064), 
   Light Purple (#E9D8EE), Pink/Purple (#933DA9)
   All combos verified WCAG AA compliant
   ============================================= */

:root {
  /* Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Font families — Libre Franklin */
  --font-display: 'Libre Franklin', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Libre Franklin', 'Helvetica Neue', Arial, sans-serif;
}

/* =============================================
   LIGHT MODE — New Palette
   White + Dark Blue (#000064) + Light Purple (#E9D8EE) + Pink/Purple (#933DA9)
   ============================================= */
:root,
[data-theme='light'] {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-surface-2: #F4EDF7;
  --color-surface-offset: #E9D8EE;
  --color-divider: #d4c4da;
  --color-border: #c0b0c8;

  /* Text — high contrast, dark blue based */
  --color-text: #000064;
  --color-text-muted: #4a4a6a;
  --color-text-faint: #5a5a78;
  --color-text-inverse: #ffffff;

  /* Primary — Dark Blue */
  --color-primary: #000064;
  --color-primary-hover: #000050;
  --color-primary-active: #00003c;
  --color-primary-highlight: #E9D8EE;
  --color-primary-subtle: #F4EDF7;

  /* Accent — Pink/Purple */
  --color-accent: #933DA9;
  --color-accent-hover: #7A2E90;
  --color-accent-active: #622078;
  --color-accent-highlight: #F4EDF7;
  --color-accent-subtle: #F9F4FB;

  /* Semantic */
  --color-success: #1B6B20;
  --color-warning: #B85000;
  --color-error: #B01B1B;

  /* Category colors — all pass AA on white */
  --cat-depression: #6A1B7B;
  --cat-anxiety: #006470;
  --cat-mania: #8B4000;
  --cat-ptsd: #7A2020;
  --cat-substance: #2D5A28;
  --cat-eating: #6B4E20;
  --cat-function: #1E4D7A;
  --cat-parenting: #5A3A7A;
  --cat-transdiagnostic: #3A5A4E;
  --cat-panic: #8A3050;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 100, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 100, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 100, 0.12);
  --shadow-focus: 0 0 0 3px rgba(147, 61, 169, 0.3);
}

/* Dark mode removed per client request */

/* =============================================
   LAYOUT
   ============================================= */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-2);
}

/* Header */
.site-header {
  background: var(--color-primary);
  border-bottom: none;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: #ffffff;
  flex-shrink: 1;
  min-width: 0;
}
.header-brand:hover .header-title strong {
  color: var(--color-surface-offset);
}

.header-logo {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.header-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  line-height: 1.3;
}
.header-title strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.3;
  transition: color var(--transition-interactive);
}

/* Navigation */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
}

.nav-link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  border-radius: var(--radius-md);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-link:hover {
  background: rgba(255,255,255,0.12);
  color: #ffffff;
}
.nav-link.active {
  color: #ffffff;
  background: rgba(255,255,255,0.18);
}
.nav-link--download {
  background: var(--color-accent);
  color: #ffffff;
  padding: var(--space-2) var(--space-4);
}
.nav-link--download:hover {
  background: var(--color-accent-hover);
  color: #ffffff;
}

.nav-hamburger {
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
  color: rgba(255,255,255,0.8);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.nav-hamburger:hover {
  background: rgba(255,255,255,0.12);
  color: #ffffff;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* Pages */
.page {
  animation: fadeIn 200ms ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Main */
main {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
  color: var(--color-text-muted);
}
.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}
.breadcrumb a:hover {
  text-decoration: underline;
}
.breadcrumb span[aria-current] {
  color: var(--color-text);
  font-weight: 600;
}

/* Hero */
.hero {
  text-align: center;
  margin-bottom: var(--space-12);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  line-height: 1.15;
}

.hero-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto var(--space-6);
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.hero-stat {
  text-align: center;
}
.hero-stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
}
.hero-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.hero-categories {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.hero-categories strong {
  color: var(--color-primary);
  font-weight: 700;
}
.hero-cat-sep {
  color: var(--color-divider);
  font-weight: 700;
}

/* =============================================
   TOOLBAR — Search + Filters
   ============================================= */

.toolbar {
  margin-bottom: var(--space-8);
}

.search-row {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.search-input-wrap {
  flex: 1;
  min-width: 240px;
  position: relative;
}

.search-input-wrap svg {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-faint);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  color: var(--color-text);
  font-family: var(--font-body);
}
.search-input::placeholder {
  color: var(--color-text-faint);
}
.search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

.view-toggle-group {
  display: flex;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.view-btn {
  padding: var(--space-3) var(--space-4);
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  min-width: 44px;
  min-height: 44px;
}
.view-btn:hover {
  background: var(--color-surface-2);
}
.view-btn[aria-pressed="true"] {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Filter rows — Population and Focus on separate lines */
.filter-rows {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.filter-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  align-items: center;
}

.filter-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: var(--space-1);
  width: 80px;
  flex-shrink: 0;
}

.filter-chip {
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  white-space: nowrap;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
}
.filter-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.filter-chip[aria-pressed="true"] {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

/* =============================================
   RESULTS COUNT
   ============================================= */
.results-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

.results-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.results-count strong {
  color: var(--color-text);
}

.compare-btn {
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 700;
  display: none;
  align-items: center;
  gap: var(--space-2);
  min-height: 36px;
}
.compare-btn:hover {
  background: var(--color-accent-hover);
}
.compare-btn.visible {
  display: inline-flex;
}

/* =============================================
   CARD GRID
   ============================================= */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-4);
}

.card-grid.list-view {
  grid-template-columns: 1fr;
}

/* =============================================
   MEASURE CARD
   ============================================= */
.measure-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
}
.measure-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.measure-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.measure-card.selected {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.card-grid.list-view .measure-card {
  flex-direction: row;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  gap: var(--space-6);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
}

.card-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.5;
}

/* Focus tags — all pass WCAG AA on white */
.tag-depression { background: rgba(106, 27, 123, 0.1); color: var(--cat-depression); }
.tag-anxiety { background: rgba(0, 100, 112, 0.1); color: var(--cat-anxiety); }
.tag-mania { background: rgba(139, 64, 0, 0.1); color: var(--cat-mania); }
.tag-ptsd { background: rgba(122, 32, 32, 0.1); color: var(--cat-ptsd); }
.tag-substance { background: rgba(45, 90, 40, 0.1); color: var(--cat-substance); }
.tag-eating { background: rgba(107, 78, 32, 0.1); color: var(--cat-eating); }
.tag-function { background: rgba(30, 77, 122, 0.1); color: var(--cat-function); }
.tag-parenting { background: rgba(90, 58, 122, 0.1); color: var(--cat-parenting); }
.tag-transdiagnostic { background: rgba(58, 90, 78, 0.1); color: var(--cat-transdiagnostic); }
.tag-panic { background: rgba(138, 48, 80, 0.1); color: var(--cat-panic); }



.tag-adult, .tag-adults { background: var(--color-primary-highlight); color: var(--color-primary); }
.tag-youth { background: var(--color-accent-highlight); color: var(--color-accent); }



.compare-check {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  display: grid;
  place-items: center;
  transition: all var(--transition-interactive);
}
.measure-card.selected .compare-check {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.card-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.25;
}

.card-abbrev {
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--text-sm);
}

.card-overview {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-grid.list-view .card-overview {
  -webkit-line-clamp: 2;
}

.card-meta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
}
.meta-item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.card-grid.list-view .card-body {
  flex: 1;
  min-width: 0;
}
.card-grid.list-view .card-meta {
  border-top: none;
  padding-top: 0;
  flex-shrink: 0;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 160px;
}

/* =============================================
   DETAIL PAGE
   ============================================= */
.detail-container {
  max-width: var(--content-default);
  margin: 0 auto;
}

.detail-hero {
  background: var(--color-primary);
  color: #ffffff;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-8);
  position: relative;
}

.detail-hero-tags {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.detail-hero-tags .tag {
  background: rgba(255,255,255,0.18);
  color: #ffffff;
}

.detail-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--space-2);
  line-height: 1.2;
}

.detail-hero-abbrev {
  font-size: var(--text-lg);
  font-weight: 600;
  opacity: 0.9;
  margin-bottom: var(--space-4);
}

.detail-hero-meta {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  opacity: 0.9;
}
.detail-hero-meta .meta-item {
  color: rgba(255,255,255,0.9);
}
.detail-hero-meta .meta-item svg {
  color: rgba(255,255,255,0.7);
}

.btn-share {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: rgba(255,255,255,0.15);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
}
.btn-share:hover {
  background: rgba(255,255,255,0.25);
}
.btn-share.copied {
  background: var(--color-success);
}

.detail-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.detail-section {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.detail-section.full-width {
  grid-column: 1 / -1;
}

.detail-section h3 {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.detail-field {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
}
.detail-field.full {
  grid-column: 1 / -1;
}
.detail-field-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-1);
}
.detail-field-value {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.5;
}

.sample-items-list {
  list-style: none;
  padding: 0;
}
.sample-items-list li {
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-style: italic;
  line-height: 1.5;
}
.sample-items-list li::before {
  content: '\201C';
  color: var(--color-primary);
  font-weight: 700;
  margin-right: 2px;
}
.sample-items-list li::after {
  content: '\201D';
  color: var(--color-primary);
  font-weight: 700;
  margin-left: 2px;
}

.resource-list {
  list-style: none;
  padding: 0;
}
.resource-list li {
  margin-bottom: var(--space-2);
}
.resource-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-1) 0;
}
.resource-list a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}
.resource-list a svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-container {
  max-width: var(--content-default);
  margin: 0 auto;
}

.about-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  line-height: 1.15;
}

.about-body {
  margin-bottom: var(--space-10);
}
.about-body p {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.8;
  max-width: none;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}

.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
}

.about-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  display: grid;
  place-items: center;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
}

.about-card h2 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.about-card-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.about-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: none;
}

.about-section {
  margin-bottom: var(--space-8);
}

.about-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

/* =============================================
   COMPARE INFO TOOLTIP
   ============================================= */
.compare-area {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.compare-info {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--color-text-faint);
  cursor: pointer;
  border-radius: var(--radius-full);
}
.compare-info:hover,
.compare-info:focus {
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}
.compare-info svg {
  display: block;
}

.compare-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  width: 280px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: #ffffff;
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  pointer-events: none;
}
.compare-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  right: 8px;
  border: 6px solid transparent;
  border-top-color: var(--color-primary);
}
.compare-info:hover .compare-tooltip,
.compare-info:focus .compare-tooltip {
  display: block;
}

.about-section p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  max-width: none;
}

.about-focus-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.about-focus-tags .tag {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--text-sm);
}
.btn-download:hover {
  background: var(--color-accent-hover);
}

.about-credit {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.about-credit p {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* =============================================
   COMPARE PANEL
   ============================================= */
.compare-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 50, 0.5);
  z-index: 200;
  display: none;
  place-items: center;
  padding: var(--space-4);
  overflow-y: auto;
}
.compare-overlay.open {
  display: grid;
}

.compare-panel {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 960px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.compare-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.compare-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
}
.compare-header .modal-close {
  position: static;
  color: var(--color-text-muted);
  background: var(--color-surface-2);
}
.compare-header .modal-close:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.modal-close {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.compare-table-wrap {
  padding: var(--space-4);
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.compare-table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 700;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--color-divider);
  white-space: nowrap;
  background: var(--color-surface);
  position: sticky;
  top: 0;
}
.compare-table th:first-child {
  width: 140px;
  color: var(--color-primary);
}
.compare-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  vertical-align: top;
  color: var(--color-text);
  line-height: 1.5;
}
.compare-table td:first-child {
  font-weight: 700;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  max-width: var(--content-wide);
  margin: var(--space-12) auto 0;
  padding: var(--space-6);
  border-top: 2px solid var(--color-primary);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  text-align: center;
}

.site-footer p {
  margin: 0 auto;
  max-width: var(--content-default);
}

.site-footer p + p {
  margin-top: var(--space-2);
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}
.site-footer a:hover {
  text-decoration: underline;
}

/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  color: var(--color-text-muted);
}
.empty-state svg {
  width: 48px;
  height: 48px;
  color: var(--color-text-faint);
  margin: 0 auto var(--space-4);
}
.empty-state h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  text-transform: none;
  letter-spacing: normal;
}
.empty-state p {
  font-size: var(--text-sm);
  margin: 0 auto;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .detail-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: var(--space-3) var(--space-4);
  }
  .header-title strong {
    font-size: var(--text-sm);
  }
  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary);
    border-bottom: 2px solid var(--color-accent);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-2);
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }
  .header-nav.open {
    display: flex;
  }
  .header-nav .nav-link {
    width: 100%;
    justify-content: center;
    padding: var(--space-3);
  }
  .header-nav .theme-toggle {
    align-self: center;
  }
  .nav-hamburger {
    display: grid;
  }
  main {
    padding: var(--space-6) var(--space-4);
  }
  .hero {
    margin-bottom: var(--space-8);
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
  .card-grid.list-view .measure-card {
    flex-direction: column;
    align-items: stretch;
  }
  .card-grid.list-view .card-meta {
    flex-direction: row;
    border-top: 1px solid var(--color-divider);
    padding-top: var(--space-3);
  }
  .detail-grid {
    grid-template-columns: 1fr;
  }
  .detail-hero {
    padding: var(--space-6);
  }
  .btn-share {
    position: static;
    margin-top: var(--space-4);
  }
  .hero-stats {
    gap: var(--space-6);
  }
  .compare-table {
    font-size: var(--text-xs);
  }
  .filter-row {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch;
  }
  .filter-label {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: var(--text-xl);
  }
  .search-row {
    flex-direction: column;
  }
  .view-toggle-group {
    align-self: flex-end;
  }
}