:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --text: #172339;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #396af5;
  --accent-soft: #eaf0ff;
  --grid: #e8edf5;
  --header: rgba(255,255,255,.88);
  --shadow: 0 8px 32px rgba(20,40,80,.035);
  --glow: rgba(57,106,245,.09);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b111c;
  --surface: #141e2d;
  --surface-alt: #1c293a;
  --text: #edf3fc;
  --muted: #9aabc0;
  --border: #2b3a4d;
  --accent: #85abff;
  --accent-soft: #243755;
  --grid: #2c3b4e;
  --header: rgba(11,17,28,.91);
  --shadow: 0 12px 36px rgba(0,0,0,.12);
  --glow: rgba(73,121,217,.12);
}

* { box-sizing: border-box; }

body {
  background:
    radial-gradient(ellipse at 88% 0%, var(--glow), transparent 42%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 16px 5%;
}

.site-header-inner {
  max-width: 1250px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  color: var(--text);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -1px;
}

.logo span { color: var(--accent); }

.logo::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 3px;
  transform: rotate(-20deg);
  margin-right: 12px;
  box-shadow: 0 0 16px var(--accent);
}

.theme-toggle {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 9px 17px;
  cursor: pointer;
  transition: background .2s, border-color .2s;
}

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

main {
  max-width: 1250px;
  margin: 48px auto;
  padding: 0 24px;
}

h1 {
  color: var(--text);
  font-size: clamp(28px, 3vw, 39px);
  font-weight: 750;
  letter-spacing: -1.3px;
  margin-bottom: 6px;
}

h2 {
  color: var(--text);
  letter-spacing: -.45px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 34px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card, .panel {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 17px;
  box-shadow: var(--shadow);
}

.card {
  position: relative;
  overflow: hidden;
  padding: 25px;
  cursor: pointer;
  text-align: left;
  transition: transform .2s, border-color .2s,
    background .2s;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.card.active {
  border-color: var(--accent);
  background: linear-gradient(
    135deg, var(--accent-soft), var(--surface) 75%
  );
}

.card.active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: var(--accent);
}

.label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.value {
  color: var(--text);
  font-size: 29px;
  font-weight: 750;
  letter-spacing: -.9px;
  margin: 12px 0;
  font-variant-numeric: tabular-nums;
}

.date {
  color: var(--muted);
  font-size: 12px;
}

.panel {
  margin-top: 22px;
  padding: 27px;
}

.panel h2 {
  font-size: 19px;
  margin-top: 0;
}

.ranges, .regional-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}

.ranges button, .regional-controls button {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 9px 17px;
  border-radius: 9px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--surface-alt);
  cursor: pointer;
  transition: all .2s;
}

.ranges button:hover,
.regional-controls button:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.ranges button.active,
.regional-controls button.active {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.analytics-card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.analytics-card .value {
  font-size: 23px;
}

.chart-wrap {
  height: 365px;
  position: relative;
}

.regional-chart-wrap {
  height: 500px;
  position: relative;
}

footer {
  color: var(--muted);
  padding-bottom: 24px;
}

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (max-width: 850px) {
  .cards {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }

  .analytics-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
}

@media (max-width: 520px) {
  main { padding: 0 15px; margin: 28px auto; }
  header { padding: 15px; }
  .cards { grid-template-columns: 1fr; }
  .panel { padding: 18px; }
  .card { padding: 20px; }
  .chart-wrap { height: 300px; }
  .regional-chart-wrap { height: 430px; }
  .analytics-grid { gap: 9px; }
  .analytics-card { padding: 13px; }
  .analytics-card .value { font-size: 19px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0s !important;
    animation-duration: 0s !important;
  }
}

/* Dashboard navigation */

.section-nav {
  display: flex;
  gap: 7px;
  margin-bottom: 34px;
  padding: 6px;
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 13px;
}

.section-nav button {
  white-space: nowrap;
  background: transparent;
  color: var(--muted);
  border: 0;
  border-radius: 9px;
  padding: 11px 19px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s, color .2s;
}

.section-nav button:hover {
  background: var(--surface-alt);
  color: var(--text);
}

.section-nav button.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.cards .card[hidden] {
  display: none !important;
}

@media(max-width: 520px) {
  .section-nav {
    width: 100%;
  }

  .section-nav button {
    padding: 10px 13px;
    font-size: 12px;
  }
}

/* Data exports */
.export-toolbar {
  display: flex;
  justify-content: flex-end;
  margin: -48px 0 20px;
}

#download-csv {
  background: var(--surface-alt);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 10px 16px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

#download-csv:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

@media(max-width:520px) {
  .export-toolbar {
    margin: 0 0 20px;
    justify-content: flex-start;
  }
}

/* Regional trend comparison */

.regional-trend {
  border-top: 1px solid var(--border);
  margin-top: 32px;
  padding-top: 28px;
}

.regional-trend-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.regional-trend h3 {
  font-size: 17px;
  font-weight: 650;
  color: var(--text);
  margin: 0;
}

.regional-trend label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
}

#region-trend-select {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 11px 14px;
  min-width: 210px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.region-trend-chart-wrap {
  position: relative;
  height: 350px;
  margin-top: 22px;
}

@media(max-width:520px) {
  #region-trend-select { width: 100%; }
  .region-trend-chart-wrap { height: 290px; }
}


/* Step 40 — Regional analytics */
.regional-insights {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.regional-insights .value {
  font-size: 23px;
}

.regional-export {
  display: flex;
  justify-content: flex-end;
  margin-top: 18px;
}

#regional-download {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 10px 16px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

#regional-download:hover {
  border-color: var(--accent);
}

#regional-download:disabled {
  opacity: .45;
  cursor: not-allowed;
}

@media (max-width: 850px) {
  .regional-insights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .regional-insights .value {
    font-size: 19px;
  }
}

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

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


/* About navigation */
html[lang="fr"] .lang-en,
html[lang="en"] .lang-fr {
  display: none !important;
}

.section-nav .about-nav-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 11px 19px;
  color: var(--muted);
  border-radius: 9px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  transition: background .2s, color .2s;
}

.section-nav .about-nav-link:hover {
  background: var(--surface-alt);
  color: var(--accent);
}