:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --page-plane:      #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11, 11, 11, 0.10);
  --success-text:   #006300;

  --series-1: #2a78d6; /* blue */
  --series-2: #eb6834; /* orange */
  --series-3: #1baf7a; /* aqua */
  --series-4: #eda100; /* yellow */
  --series-5: #e87ba4; /* magenta */
  --series-6: #008300; /* green */
  --series-7: #4a3aa7; /* violet */
  --series-8: #e34948; /* red */

  --sequential-500: #256abf;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --page-plane:      #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255, 255, 255, 0.10);
    --success-text:   #0ca30c;

    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --series-4: #c98500;
    --series-5: #d55181;
    --series-6: #008300;
    --series-7: #9085e9;
    --series-8: #e66767;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1:      #1a1a19;
  --page-plane:      #0d0d0d;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #898781;
  --gridline:       #2c2c2a;
  --baseline:       #383835;
  --border:         rgba(255, 255, 255, 0.10);
  --success-text:   #0ca30c;

  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --series-4: #c98500;
  --series-5: #d55181;
  --series-6: #008300;
  --series-7: #9085e9;
  --series-8: #e66767;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page-plane);
  color: var(--text-primary);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--series-1); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
}
.site-header .brand { font-weight: 700; text-decoration: none; color: var(--text-primary); }
.site-header nav a { margin-left: 20px; text-decoration: none; color: var(--text-secondary); }
.site-header nav a:hover { color: var(--text-primary); }

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.site-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  padding: 24px;
}

h1 { font-size: 1.6rem; margin-bottom: 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 12px; }
p.lede { color: var(--text-secondary); margin-top: 0; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 20px 0 32px;
}
.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.stat-tile .value {
  font-size: 1.7rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.stat-tile .label {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.output-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.output-card {
  display: block;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  text-decoration: none;
  color: inherit;
}
.output-card:hover { border-color: var(--series-1); }
.output-card .kind {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  margin-bottom: 6px;
}
.output-card .title { font-weight: 600; }
.output-card .meta { color: var(--text-secondary); font-size: 0.85rem; margin-top: 4px; }

.metrics-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.metric-chip {
  background: var(--page-plane);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.chart-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
}
.chart-card h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.axis path, .axis line { stroke: var(--baseline); }
.axis text { fill: var(--text-muted); font-size: 11px; }
.gridline { stroke: var(--gridline); }

.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text-primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transition: opacity 0.1s ease;
  white-space: nowrap;
}

details.table-toggle { margin-top: 8px; }
details.table-toggle summary { cursor: pointer; color: var(--text-secondary); font-size: 0.85rem; }
table.data-table {
  border-collapse: collapse;
  width: 100%;
  margin-top: 8px;
  font-size: 0.85rem;
}
table.data-table th, table.data-table td {
  text-align: left;
  padding: 4px 8px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}
table.data-table th { color: var(--text-muted); font-weight: 600; }

.legend { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; font-size: 0.82rem; color: var(--text-secondary); }
.legend .swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }