/* D3 Power Tools — shared theme
   Usage:
     <link rel="stylesheet" href="/style/d3-power-tools.css">
     <script src="/style/theme-switch.js"></script>
   The theme switcher is optional — without it, light theme applies,
   respecting prefers-color-scheme for automatic dark mode.
*/

/* ── Tokens ─────────────────────────────────────────── */

:root {
  color-scheme: light;

  /* typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Consolas", monospace;
  --font-size: 14px;
  --line-height: 1.55;

  /* surfaces */
  --color-bg: #fff;
  --color-surface: #f7f7f7;
  --color-surface-alt: #fafafa;

  /* text */
  --color-text: #1a1a1a;
  --color-text-muted: #4a4a4a;
  --color-text-faint: #777;

  /* borders & dividers */
  --color-border: #d4d4d4;
  --color-border-light: #e4e4e4;

  /* links & accents */
  --color-link: #2068a0;
  --color-link-hover: #174f7e;

  /* axes & chart chrome */
  --color-axis: #333;
  --color-tick: #666;
  --color-grid: #eee;

  /* data palette — Paul Tol qualitative, colorblind-safe */
  --color-cat-1: #4477AA;
  --color-cat-2: #EE6677;
  --color-cat-3: #228833;
  --color-cat-4: #CCBB44;
  --color-cat-5: #66CCEE;
  --color-cat-6: #AA3377;

  /* semantic data colors */
  --color-primary: #4e79a7;
  --color-secondary: #e15759;
  --color-tertiary: #76b7b2;
  --color-accent: #f28e2b;
  --color-positive: #59a14f;
  --color-negative: #e15759;

  /* UI components */
  --color-tooltip-bg: #fff;
  --color-tooltip-border: #ddd;
  --color-hover-bg: #f5f5f5;
  --color-selected-bg: #e8f0fe;
  --shadow: 0 1px 4px rgba(0,0,0,0.08);
  --shadow-lg: 0 2px 8px rgba(0,0,0,0.1);
  --radius: 3px;

  /* spacing scale */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;

  /* transitions */
  --duration: 0.25s;
}


/* ── Dark theme ─────────────────────────────────────── */

[data-theme="dark"] {
  color-scheme: dark;

  --color-bg: #1a1a2e;
  --color-surface: #222244;
  --color-surface-alt: #1e1e3a;

  --color-text: #e8e8ec;
  --color-text-muted: #a8a8c0;
  --color-text-faint: #787890;

  --color-border: #3a3a5a;
  --color-border-light: #303050;

  --color-link: #7db4e4;
  --color-link-hover: #9dcaf0;

  --color-axis: #8899aa;
  --color-tick: #778899;
  --color-grid: #2a2a4a;

  --color-cat-1: #6699CC;
  --color-cat-2: #F09090;
  --color-cat-3: #44AA55;
  --color-cat-4: #DDCC66;
  --color-cat-5: #88DDEE;
  --color-cat-6: #CC5599;

  --color-primary: #6fa8dc;
  --color-secondary: #ea8385;
  --color-tertiary: #8fd4cf;
  --color-accent: #f5a623;
  --color-positive: #81c784;
  --color-negative: #ea8385;

  --color-tooltip-bg: #2d2d50;
  --color-tooltip-border: #444466;
  --color-hover-bg: #2a2a4a;
  --color-selected-bg: #2a3a5a;
  --shadow: 0 1px 4px rgba(0,0,0,0.3);
  --shadow-lg: 0 2px 8px rgba(0,0,0,0.4);
}



/* ── Base reset ─────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  font-size: var(--font-size);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--duration) ease, color var(--duration) ease;
}


/* ── Typography ─────────────────────────────────────── */

h1, h2, h3 { margin: 0; }

h1 {
  font-size: 20px;
  font-weight: 500;
  color: var(--color-text);
}

h1 b { font-weight: 600; }

.subtitle {
  color: var(--color-text-muted);
  font-size: 13px;
  margin: 2px 0 0;
}

h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin: var(--sp-8) 0 var(--sp-3);
  padding: 0 0 var(--sp-1);
  border-bottom: 1px solid var(--color-border);
}

h2:first-of-type { margin-top: 0; }

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover { text-decoration: underline; }


/* ── Tables ─────────────────────────────────────────── */

table {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
  font-size: 13px;
}

th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--color-text-muted);
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
}

td {
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: middle;
}

tr:hover td { background: var(--color-hover-bg); }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  text-align: right;
}

.positive { color: var(--color-positive); }
.negative { color: var(--color-negative); }


/* ── Controls ───────────────────────────────────────── */

button, select {
  font-family: var(--font-sans);
  font-size: 12px;
  padding: var(--sp-1) var(--sp-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--duration) ease, border-color var(--duration) ease;
}

button:hover, select:hover {
  border-color: var(--color-link);
}

button.active {
  background: var(--color-link);
  border-color: var(--color-link);
  color: #fff;
}

.controls {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: var(--sp-4);
}

.controls label {
  font-size: 12px;
  color: var(--color-text-muted);
}


/* ── Tooltip ────────────────────────────────────────── */

.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--color-tooltip-bg);
  border: 1px solid var(--color-tooltip-border);
  border-radius: var(--radius);
  padding: var(--sp-2) var(--sp-3);
  font-size: 12px;
  box-shadow: var(--shadow-lg);
  color: var(--color-text);
  z-index: 100;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.tooltip.visible { opacity: 1; }


/* ── Chart container ────────────────────────────────── */

.chart {
  position: relative;
  background: var(--color-bg);
}

.chart svg text {
  fill: var(--color-text);
}

.chart svg .axis text,
.chart svg .tick text {
  fill: var(--color-tick);
  font-size: 11px;
}

.chart svg .axis line,
.chart svg .axis path,
.chart svg .tick line {
  stroke: var(--color-grid);
}

.chart svg .domain {
  stroke: var(--color-axis);
}


/* ── Theme toggle ──────────────────────────────────── */

.theme-toggle {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-faint);
  padding: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  transition: background var(--duration) ease, border-color var(--duration) ease, color var(--duration) ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--color-text-faint);
  color: var(--color-text-muted);
}

.theme-toggle svg {
  display: block;
}



/* ── SVG theme inheritance ──────────────────────────── */

svg { color: var(--color-text); }
svg text { fill: currentColor; }