/* Paradoxul locuirii / The Housing Paradox
   Design system with WCAG AAA contrast tokens for Light and Dark themes */

:root {
  --bg-canvas: #fbfaf8;
  --bg-surface: #ffffff;
  --bg-surface-subtle: #f4f2ee;
  --bg-surface-elevated: #ffffff;
  --bg-surface-active: #e8e5de;
  --text-primary: #141413;
  --text-secondary: #383734;
  --text-muted: #52504c;
  --border-color: #d8d5cc;
  --border-subtle: #e6e3da;
  --accent-primary: #9e2a2b;
  --accent-hover: #7e1e1f;
  --accent-surface: #fae8e8;
  --accent-contrast: #ffffff;
  --romania-marker: #9e2a2b;
  --romania-glow: rgba(158, 42, 43, 0.25);
  --regime-postsocialist: #9e2a2b;
  --regime-unitary: #1b4965;
  --regime-mediterranean: #b07d10;
  --regime-mixed: #2d6a4f;
  --focus-ring: #1b4965;
  --font-serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
  --bg-canvas: #121316;
  --bg-surface: #1a1c22;
  --bg-surface-subtle: #242730;
  --bg-surface-elevated: #282c37;
  --bg-surface-active: #323745;
  --text-primary: #f4f4f6;
  --text-secondary: #d4d4d8;
  --text-muted: #a6a6b0;
  --border-color: #363a47;
  --border-subtle: #2a2e39;
  --accent-primary: #ff7b72;
  --accent-hover: #ff9b94;
  --accent-surface: #361f22;
  --accent-contrast: #121316;
  --romania-marker: #ff7b72;
  --romania-glow: rgba(255, 123, 114, 0.35);
  --regime-postsocialist: #ff7b72;
  --regime-unitary: #79c0ff;
  --regime-mediterranean: #e3b341;
  --regime-mixed: #7ee787;
  --focus-ring: #79c0ff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-serif);
  line-height: 1.68;
  font-size: 1.125rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  overflow-x: hidden;
  padding: 0;
  margin: 0;
}

/* Accessibility focus styles */
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
}

/* Layout container */
.site-wrap {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.wide-wrap {
  max-width: 1120px;
}

/* Navigation bar */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
}

.nav-brand {
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switch, .theme-toggle {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.lang-switch:hover, .theme-toggle:hover {
  background: var(--bg-surface-subtle);
  border-color: var(--text-muted);
}

/* Header & Lead */
.hero {
  padding: 3.5rem 0 2rem;
}

.kicker {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
}

.headline {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
  .headline {
    font-size: 3rem;
  }
}

.deck {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 400;
}

.byline-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2.5rem;
}

/* Stat Grid (The Core Paradox) */
.stat-banner {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-sans);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--accent-primary);
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.stat-sub {
  font-size: 0.8125rem;
  line-height: 1.35;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

/* Narrative prose */
.prose {
  margin-bottom: 3rem;
}

.prose p {
  margin-bottom: 1.4rem;
}

.prose h2 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

.prose h3 {
  font-size: 1.35rem;
  line-height: 1.3;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}

.prose blockquote {
  border-left: 3px solid var(--accent-primary);
  padding: 0.75rem 0 0.75rem 1.25rem;
  margin: 1.75rem 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Semantic figures & Archival imagery */
figure.editorial-figure {
  margin: 2.5rem 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

figure.editorial-figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 520px;
}

figure.editorial-figure figcaption {
  padding: 1rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface-subtle);
}

.attribution {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Interactive Container (Card) */
.interactive-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 3rem 0;
  box-shadow: var(--shadow-md);
  font-family: var(--font-sans);
}

.interactive-header {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.interactive-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.interactive-subtitle {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* Dataviz: European Matrix Scatterplot */
.matrix-container {
  width: 100%;
  margin: 1.5rem 0;
}

.matrix-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.8125rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
}

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

.svg-chart-wrap {
  width: 100%;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 0.75rem;
  position: relative;
}

.chart-svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Matrix Country Details Drawer/Box */
.country-inspector {
  background: var(--bg-canvas);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.25rem;
  margin-top: 1rem;
  min-height: 110px;
}

.inspector-country-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.inspector-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  font-size: 0.875rem;
}

@media (min-width: 640px) {
  .inspector-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.inspector-stat-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.inspector-stat-val {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.inspector-note {
  margin-top: 0.6rem;
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--text-secondary);
  font-style: italic;
}

/* Interactive: Floorplan Anatomy of 52 sqm */
.floorplan-toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.scenario-btn {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.scenario-btn:hover {
  background: var(--bg-surface-active);
}

.scenario-btn.active {
  background: var(--accent-primary);
  color: var(--accent-contrast);
  border-color: var(--accent-primary);
}

.floorplan-schematic {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 6px;
  background: var(--border-color);
  padding: 6px;
  border-radius: 6px;
  margin: 1.25rem 0;
}

.fp-room {
  background: var(--bg-surface);
  padding: 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.fp-room:hover {
  background: var(--bg-surface-subtle);
  outline: 2px solid var(--accent-primary);
}

.fp-room.selected {
  background: var(--accent-surface);
  outline: 2px solid var(--accent-primary);
}

.fp-room-living {
  grid-column: 1 / 2;
  grid-row: 1 / 3;
  min-height: 160px;
}

.fp-room-bedroom {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  min-height: 110px;
}

.fp-room-kitchen {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
  min-height: 90px;
}

.fp-room-hall {
  grid-column: 1 / 2;
  grid-row: 3 / 4;
}

.fp-room-bath {
  grid-column: 2 / 3;
  grid-row: 3 / 4;
}

.fp-room-balcony {
  grid-column: 1 / 3;
  background: var(--bg-surface-subtle);
  font-size: 0.8125rem;
  text-align: center;
  padding: 0.5rem;
  border: 1px dashed var(--border-color);
}

.fp-room-name {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.fp-room-sqm {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.fp-room-badge {
  font-size: 0.75rem;
  padding: 0.2rem 0.4rem;
  background: var(--border-subtle);
  border-radius: 3px;
  color: var(--text-secondary);
  align-self: flex-start;
  margin-top: 0.5rem;
}

.fp-detail-panel {
  background: var(--bg-canvas);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  margin-top: 0.75rem;
  font-size: 0.875rem;
}

/* Interactive: Inflation Mortgage Melter */
.calc-control-group {
  margin: 1.5rem 0;
}

.calc-slider-label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
}

.calc-slider {
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.calc-results-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .calc-results-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.calc-result-box {
  background: var(--bg-canvas);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
}

.calc-res-num {
  font-size: 1.4rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-primary);
  margin-top: 0.25rem;
}

/* Interactive: Staircase Voting Dilemma */
.staircase-panel {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.staircase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin: 1rem 0;
}

.apt-cell {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.5rem 0.4rem;
  text-align: center;
  font-size: 0.75rem;
  transition: all 0.15s ease;
}

.apt-cell.vote-yes {
  border-color: var(--regime-mixed);
  background: rgba(45, 106, 79, 0.12);
  color: var(--text-primary);
}

.apt-cell.vote-no {
  border-color: var(--accent-primary);
  background: rgba(158, 42, 43, 0.12);
  color: var(--text-primary);
}

.apt-cell.vote-absent {
  border-color: var(--border-color);
  background: var(--bg-surface-subtle);
  color: var(--text-muted);
}

.staircase-tally {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 1rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

/* References & Footnotes */
.references-section {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.references-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.references-list {
  padding-left: 1.25rem;
  margin-bottom: 2rem;
}

.references-list li {
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

/* Footer */
.site-footer {
  margin-top: 4rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 640px) {
  .site-footer {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-nav {
  display: flex;
  gap: 1.25rem;
}

.footer-nav a {
  color: var(--text-muted);
}

.footer-nav a:hover {
  color: var(--text-primary);
}