/**
 * explorer.css — Pre-1820 cross-core data explorer
 * Inherits theme variables from /platform/css/textbook.css
 */

.explorer-body {
  background: var(--color-bg, #fff);
  color: var(--color-text, #1a1a2e);
  font-family: "Manrope", "Segoe UI", sans-serif;
}

.explorer-page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 24px 64px;
}

/* ── Header ───────────────────────────────────────────────────── */

.explorer-header {
  margin: 8px 0 24px;
}
.explorer-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.explorer-caption {
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 0;
  color: var(--color-text-muted, #475569);
  max-width: 80ch;
}

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

.explorer-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 16px;
  background: var(--color-bg-alt, #f8fafc);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  margin-bottom: 24px;
}

.explorer-controls fieldset {
  border: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.explorer-controls-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted, #475569);
  padding: 0 0 4px;
}

.explorer-toggle, .explorer-radio {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  cursor: pointer;
  user-select: none;
  padding: 4px 6px;
  border-radius: 4px;
  transition: background 0.1s;
}
.explorer-toggle:hover, .explorer-radio:hover {
  background: var(--color-hover, rgba(0,0,0,0.04));
}

.explorer-toggle input, .explorer-radio input {
  margin: 0;
  cursor: pointer;
}

.explorer-toggle-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}
.explorer-toggle.core-london .explorer-toggle-swatch { background: var(--core-london, #2563eb); }
.explorer-toggle.core-beijing .explorer-toggle-swatch { background: var(--core-beijing, #dc2626); }
.explorer-toggle.core-delhi .explorer-toggle-swatch { background: var(--core-delhi, #ca8a04); }
.explorer-toggle.core-istanbul .explorer-toggle-swatch { background: var(--core-istanbul, #16a34a); }

/* Time window range sliders */
.explorer-time-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.explorer-time-row input[type="range"] {
  flex: 1 1 100px;
  min-width: 80px;
}
.explorer-time-display {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--color-text, #1a1a2e);
  white-space: nowrap;
}

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

.explorer-chart-wrap {
  margin-bottom: 24px;
}
.explorer-chart {
  position: relative;
  width: 100%;
  min-height: 440px;
  background: var(--color-bg, #fff);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  padding: 16px;
}
.explorer-chart svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}
.explorer-metric-note {
  font-size: 0.82rem;
  color: var(--color-text-muted, #475569);
  margin: 8px 4px 0;
  font-style: italic;
}

/* D3 elements */
.explorer-axis path, .explorer-axis line {
  stroke: var(--color-border, #cbd5e1);
}
.explorer-axis text {
  font-size: 11px;
  fill: var(--color-text-muted, #64748b);
}
.explorer-grid line {
  stroke: var(--color-border, #e2e8f0);
  stroke-dasharray: 2 3;
}
.explorer-line {
  fill: none;
  stroke-width: 2.5;
  transition: opacity 0.2s;
}
.explorer-line.hidden {
  display: none;
}
.explorer-line.core-london { stroke: var(--core-london, #2563eb); }
.explorer-line.core-beijing { stroke: var(--core-beijing, #dc2626); }
.explorer-line.core-delhi { stroke: var(--core-delhi, #ca8a04); }
.explorer-line.core-istanbul { stroke: var(--core-istanbul, #16a34a); }

.explorer-band {
  fill-opacity: 0.15;
  stroke: none;
}
.explorer-band.core-london { fill: var(--core-london, #2563eb); }
.explorer-band.core-beijing { fill: var(--core-beijing, #dc2626); }
.explorer-band.core-delhi { fill: var(--core-delhi, #ca8a04); }
.explorer-band.core-istanbul { fill: var(--core-istanbul, #16a34a); }

.explorer-data-point {
  stroke: var(--color-bg, #fff);
  stroke-width: 1.5;
  cursor: pointer;
}
.explorer-data-point.core-london { fill: var(--core-london, #2563eb); }
.explorer-data-point.core-beijing { fill: var(--core-beijing, #dc2626); }
.explorer-data-point.core-delhi { fill: var(--core-delhi, #ca8a04); }
.explorer-data-point.core-istanbul { fill: var(--core-istanbul, #16a34a); }

.explorer-event-marker {
  cursor: pointer;
  fill: var(--color-text-muted, #64748b);
  stroke: var(--color-bg, #fff);
  stroke-width: 1;
  transition: r 0.15s;
}
.explorer-event-marker:hover {
  r: 7;
}
.explorer-event-marker.core-london { fill: var(--core-london, #2563eb); }
.explorer-event-marker.core-beijing { fill: var(--core-beijing, #dc2626); }
.explorer-event-marker.core-delhi { fill: var(--core-delhi, #ca8a04); }
.explorer-event-marker.core-istanbul { fill: var(--core-istanbul, #16a34a); }

.explorer-divergence-band {
  fill: var(--color-text-muted, #94a3b8);
  fill-opacity: 0.08;
}
.explorer-divergence-label {
  font-size: 11px;
  fill: var(--color-text-muted, #64748b);
  font-style: italic;
}

/* Tooltip */
.explorer-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--color-bg, #fff);
  border: 1px solid var(--color-border, #cbd5e1);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.82rem;
  line-height: 1.4;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  max-width: 280px;
  opacity: 0;
  transition: opacity 0.12s;
  z-index: 10;
}
.explorer-tooltip.visible {
  opacity: 1;
}
.explorer-tooltip-title {
  font-weight: 600;
  margin-bottom: 2px;
}
.explorer-tooltip-meta {
  color: var(--color-text-muted, #64748b);
  font-size: 0.78rem;
}

/* ── Explainer ────────────────────────────────────────────────── */

.explorer-explainer {
  margin-bottom: 24px;
}
.explorer-details {
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  padding: 0 16px;
  background: var(--color-bg, #fff);
}
.explorer-details-summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 0;
  list-style: none;
  outline: none;
}
.explorer-details-summary::-webkit-details-marker { display: none; }
.explorer-details-summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.15s;
}
.explorer-details[open] .explorer-details-summary::before {
  transform: rotate(90deg);
}
.explorer-details-body {
  padding: 4px 0 16px;
  font-size: 0.92rem;
  line-height: 1.55;
}
.explorer-details-body p {
  margin: 0 0 12px;
}
.explorer-details-body p:last-child { margin-bottom: 0; }

/* ── Exits ────────────────────────────────────────────────────── */

.explorer-exits {
  margin-bottom: 24px;
  padding: 16px 20px;
  background: var(--color-bg-alt, #f8fafc);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
}
.explorer-exits-title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 8px;
}
.explorer-exits-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 4px 16px;
}
.explorer-exits-list li {
  padding: 4px 0;
}
.explorer-exits-list a {
  color: var(--color-accent, #2563eb);
  text-decoration: none;
  font-size: 0.92rem;
}
.explorer-exits-list a:hover {
  text-decoration: underline;
}

/* ── Sources ──────────────────────────────────────────────────── */

.explorer-sources {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--color-text-muted, #475569);
}
.explorer-sources-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text, #1a1a2e);
  margin: 0 0 8px;
}
.explorer-sources-list {
  list-style: disc;
  padding-left: 20px;
  margin: 0 0 12px;
}
.explorer-sources-list li {
  margin-bottom: 4px;
}
.explorer-data-note {
  font-style: italic;
  margin: 8px 0 0;
}

/* ── Mobile ───────────────────────────────────────────────────── */

@media (max-width: 600px) {
  .explorer-page { padding: 16px 12px 48px; }
  .explorer-title { font-size: 1.35rem; }
  .explorer-caption { font-size: 0.9rem; }
  .explorer-controls { padding: 12px; gap: 12px; }
  .explorer-chart { min-height: 360px; padding: 8px; }
  .explorer-toggle, .explorer-radio { font-size: 0.88rem; }

  /* T-6.6d — touch-target bump for the year-window range sliders. */
  .explorer-time-row input[type="range"] { height: 44px; background: transparent; }
  .explorer-time-row input[type="range"]::-webkit-slider-runnable-track {
    height: 6px; background: var(--color-border, #cbd5e1); border-radius: 3px;
  }
  .explorer-time-row input[type="range"]::-moz-range-track {
    height: 6px; background: var(--color-border, #cbd5e1); border-radius: 3px;
  }
  .explorer-time-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 28px; height: 28px;
    margin-top: -11px;
    border-radius: 50%;
    background: var(--color-accent, #a82828);
    border: 2px solid var(--color-bg, #fff);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  }
  .explorer-time-row input[type="range"]::-moz-range-thumb {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--color-accent, #a82828);
    border: 2px solid var(--color-bg, #fff);
  }
}

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

[data-theme="dark"] .explorer-toggle-swatch.core-london,
[data-theme="dark"] .explorer-line.core-london,
[data-theme="dark"] .explorer-data-point.core-london,
[data-theme="dark"] .explorer-event-marker.core-london { stroke: var(--core-london, #60a5fa); fill: var(--core-london, #60a5fa); }