/* fcc-recording — site-specific Field Bulletin layer.
 *
 * Per-site accent: Edison-wax sepia — the warm brown of phonograph wax
 * cylinders and reel-to-reel magnetic-tape iron oxide. Distinct from
 * symbols parchment gold (#d4a574 lighter, more yellow) and from
 * earthquakes seismic amber (#e87b4f more salmon) by being darker
 * and chocolatier.
 */

/* !important required because /shared/fcc-theme-boot.js writes --accent
   as inline-style on <html>, beating stylesheet specificity. */
:root, html[data-mode="dark"] {
  --accent:      #b45309 !important;
  --accent-2:    #d97706 !important;
  --accent-wash: color-mix(in srgb, #b45309 12%, transparent) !important;
  --accent-ink:  #ffffff !important;
}
html[data-mode="light"] {
  --accent:      #78350f !important;
  --accent-2:    #92400e !important;
  --accent-wash: color-mix(in srgb, #78350f 8%, transparent) !important;
  --accent-ink:  #ffffff !important;
}

/* ── Media cards (gallery uses .media-card) ─────────────────── */
.media-card {
  background: var(--panel-2);
  border: 0;
  border-top: 1px solid var(--border);
  border-radius: 0;
  padding: 1rem 1.1rem 1.1rem;
  cursor: pointer;
  display: flex; flex-direction: column; gap: 0.5rem;
  min-height: 120px;
  transition:
    border-top-color var(--dur-1) var(--ease-in-out),
    transform var(--dur-2) var(--ease-out);
}
.media-card:hover {
  border-top-color: var(--accent);
  transform: translateY(-2px);
}
.media-card-year,
.media-card-era {
  font: 700 0.72rem/1 var(--mono);
  letter-spacing: 0.06em;
  color: var(--accent);
  font-feature-settings: "tnum" 1;
}
.media-card-name,
.media-card-title {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  line-height: 1.25;
}
.media-card-desc {
  font-size: 0.88rem;
  color: var(--ink-2, var(--dim));
  line-height: 1.55;
  margin: 0;
}
.media-card-fact,
.media-card-funfact {
  font-family: var(--serif);
  font-size: 0.85rem;
  font-style: italic;
  color: var(--ink-3, var(--dim));
  line-height: 1.5;
  margin: 0;
  padding-top: 0.4rem;
  border-top: 1px solid var(--rule-2, var(--border));
}
.media-card-meta {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  font: 500 0.72rem var(--mono);
  color: var(--ink-3, var(--dim));
  font-feature-settings: "tnum" 1;
}

/* ── Storage Viz (Hero) ─────────────────────────────────────── */
.hero-card,
#storage-viz.section-card { padding: 1.75rem 1.5rem 1.5rem; }
.viz-selector {
  display: flex; gap: 0.4rem; flex-wrap: wrap;
  margin-bottom: 0.85rem;
}
.viz-selector-btn {
  font: 500 0.74rem/1 var(--mono);
  letter-spacing: 0.04em;
  padding: 0.45rem 0.85rem;
  border-radius: var(--r-1);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--ink-3, var(--dim));
  cursor: pointer;
  transition:
    color var(--dur-1) var(--ease-in-out),
    border-color var(--dur-1) var(--ease-in-out),
    background var(--dur-1) var(--ease-in-out);
}
.viz-selector-btn:hover { color: var(--ink-2, var(--text)); border-color: var(--rule-strong); }
.viz-selector-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-wash);
}
.viz-canvas-wrap {
  width: 100%;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
#vizCanvas {
  width: 100%; height: 380px;
  display: block;
}
.viz-label {
  margin: 0.85rem 0 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--ink-2, var(--text));
  line-height: 1.55;
}
.viz-speed-control {
  display: grid; gap: 0.5rem;
  grid-template-columns: 140px 1fr 60px;
  align-items: center;
  margin-top: 0.85rem;
  padding: 0.6rem 0.85rem;
  background: var(--panel-2);
  border-top: 1px solid var(--border);
}
.viz-speed-control label {
  font: 500 0.66rem/1 var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3, var(--dim));
}

/* ── Storage Density chart ──────────────────────────────────── */
.density-canvas-wrap {
  width: 100%;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
#densityCanvas {
  width: 100%; height: 400px;
  display: block;
}
.density-legend {
  display: flex; gap: 1rem; flex-wrap: wrap;
  font: 500 0.78rem var(--mono);
  color: var(--ink-3, var(--dim));
  margin-top: 0.85rem;
}
.density-legend-item { display: inline-flex; align-items: center; gap: 0.4rem; }
.density-legend-swatch { display: inline-block; width: 12px; height: 12px; }
.density-detail {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--panel-2);
  border-top: 1px solid var(--border);
  font-family: var(--serif);
  font-size: 0.92rem;
  color: var(--ink-2, var(--text));
  line-height: 1.55;
  min-height: 1.5em;
}

/* ── Capacity Calculator ────────────────────────────────────── */
.select-input { width: 100%; }
.capacity-result {
  margin-top: 0.85rem;
  padding: 1rem 1.1rem;
  background: var(--panel-2);
  border-top: 1px solid var(--border);
}
.capacity-result-headline {
  font: 600 1.1rem var(--serif);
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.capacity-result-rows {
  display: grid; gap: 0.4rem;
  grid-template-columns: 140px 1fr;
  font-family: var(--mono);
  font-feature-settings: "tnum" 1, "zero" 1;
  font-size: 0.85rem;
}
.capacity-result-label {
  font: 500 0.66rem/1 var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3, var(--dim));
}
.capacity-result-value { color: var(--text); }

/* ── Bitrate Quality ────────────────────────────────────────── */
.bitrate-controls { margin-bottom: 0.85rem; }
.bitrate-panels {
  display: grid; gap: 0.85rem;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 720px) { .bitrate-panels { grid-template-columns: 1fr; } }
.bitrate-panel {
  display: flex; flex-direction: column;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 0.7rem 0.85rem;
  gap: 0.5rem;
}
.bitrate-panel-label {
  font: 500 0.66rem/1 var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3, var(--dim));
}
.bitrate-panel canvas {
  width: 100%; height: 140px;
}

/* ── Size Comparator ────────────────────────────────────────── */
.size-controls {
  display: grid; gap: 0.75rem;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 0.85rem;
}
@media (max-width: 720px) { .size-controls { grid-template-columns: 1fr; } }
.size-result {
  padding: 1rem 1.1rem;
  background: var(--panel-2);
  border-top: 1px solid var(--border);
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink-2, var(--text));
  line-height: 1.55;
}
.size-result-headline {
  font: 600 1.1rem var(--serif);
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.size-result-ratio {
  font: 500 1.4rem 'JetBrains Mono', ui-monospace, monospace;
  color: var(--accent);
  font-feature-settings: "tnum" 1, "zero" 1;
  letter-spacing: -0.02em;
}

@media (max-width: 720px) {
  #vizCanvas { height: 280px; }
  #densityCanvas { height: 320px; }
}
@media (max-width: 480px) {
  #vizCanvas { height: 220px; }
  #densityCanvas { height: 260px; }
}
