/* Frequency Heatmap Generator — tool-specific layout.
   Reuses global design-system tokens + globally-defined classes
   (.content-section, .faq-list/.faq-item/.faq-question/.faq-answer,
   .related-tool-card, .input-hint, .card-grid). The classes defined below
   are tool-local layout/component styles not provided globally — they mirror
   the sibling Signal-Processing tools (real-time-spectrogram, waveform-visualizer)
   so this tool reads as a sibling. No global class is redefined here. */

/* ── Analyzer container ── */
.analyzer {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
}
.privacy-note {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(0, 255, 65, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* ── Dropzone ── */
.dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 84px;
  padding: var(--space-md);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s;
  margin-bottom: var(--space-sm);
}
.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-text);
  box-shadow: var(--glow-sm);
  outline: none;
}
.dropzone.is-dragging {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--glow-md);
}

/* ── Status line ── */
.fhg-status {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  border-left: 3px solid var(--color-border);
  background: rgba(0, 255, 65, 0.03);
  border-radius: var(--radius-sm);
}
.fhg-status.is-ok { color: var(--color-success); border-left-color: var(--color-success); }
.fhg-status.is-error { color: var(--color-error); border-left-color: var(--color-error); }

/* ── Canvas ── */
.canvas-wrap {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px;
  overflow: hidden;
}
#heatmap-canvas {
  display: block;
  width: 100%;
  height: 480px;
  background: #050a05;
  border-radius: var(--radius-sm);
}

/* ── Colour-map legend ── */
.legend-wrap { margin-top: var(--space-md); }
.legend-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
#legend-canvas {
  width: 100%;
  height: 18px;
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* ── Lower grid (controls + info) ── */
.lower-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}
.panel {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.panel__title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--color-primary);
  margin: 0 0 var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.panel-note {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: var(--space-md) 0 0;
}

/* ── Info table ── */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}
.info-table tbody td {
  padding: var(--space-xs) var(--space-md);
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 60%, transparent);
}
.info-table tbody td:first-child { color: var(--color-text-muted); width: 50%; }
.info-table tbody td:last-child { color: var(--color-secondary); font-weight: 600; word-break: break-all; }

/* ── Controls ── */
.control-group { margin-bottom: var(--space-md); }
.control-group--half { flex: 1 1 0; min-width: 0; }
.control-row {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: 0;
}
.control-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  margin-bottom: var(--space-xs);
}
.control-label__val {
  font-family: var(--font-mono);
  color: var(--color-secondary);
  font-weight: 600;
}
.select-field {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  padding: var(--space-xs) var(--space-sm);
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.select-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--glow-sm);
}
.control-slider {
  width: 100%;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* ── Action bar ── */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  margin-top: var(--space-md);
}

/* ── Responsive ── */
@media (max-width: 992px) {
  .lower-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  #heatmap-canvas { height: 360px; }
  .control-row { flex-direction: column; gap: 0; }
  .control-row .control-group { margin-bottom: var(--space-md); }
}
@media (max-width: 480px) {
  #heatmap-canvas { height: 300px; }
  .legend-head { font-size: 9px; }
}