/* Frequency Response Curve Tool — tool-specific overrides ONLY.
   Sweep + mic measurement → relative dB curve, target overlay, deviation shading.
   Global classes (.tool-panel, .btn*, .badge, .input-label, .input-hint, .content-section,
   .faq-list/.faq-item, .related-tools-grid/.related-tool-card, .steps) come from design-system.css
   and are NOT redefined here. */

/* Honesty / safety notes */
.frc-note {
  max-width: 840px;
  margin: var(--space-md) auto 0;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.55;
  text-align: left;
  color: var(--color-text);
}
.frc-note strong { color: var(--color-text-bright); }
.frc-note--info { border-left: 4px solid var(--color-secondary); background: rgba(0, 255, 65, 0.04); }
.frc-note--warn {
  border-color: rgba(255, 180, 60, 0.4);
  border-left: 4px solid var(--color-warning);
  background: rgba(255, 180, 60, 0.06);
  color: #ffd9a0;
  font-size: 0.86rem;
}
.frc-note--warn strong { color: #ffe9c4; }

/* Privacy strip + mic indicator */
.frc-privacy {
  display: flex; align-items: center; gap: var(--space-sm);
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}
.frc-mic-indicator {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  margin: var(--space-md) 0 0; font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-secondary);
}
.frc-mic-indicator__dot {
  width: 10px; height: 10px; border-radius: 50%; background: var(--color-error);
  box-shadow: 0 0 8px var(--color-error); animation: frc-pulse 1.1s ease-in-out infinite;
}
@keyframes frc-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

/* Transport */
.frc-transport { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: center; }

/* Plot canvas */
.frc-canvas-wrap {
  margin-top: var(--space-lg);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: #050a05; overflow: hidden;
}
#frc-canvas { display: block; width: 100%; height: 460px; }

/* Meters */
.frc-meters { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); margin-top: var(--space-md); }
.frc-meter { display: flex; align-items: center; gap: var(--space-sm); }
.frc-meter__label { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-text-muted); min-width: 120px; }
.frc-meter__val { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-primary); min-width: 64px; text-align: right; }
.frc-bar { flex: 1; height: 8px; border-radius: var(--radius-full); background: rgba(0, 255, 65, 0.10); overflow: hidden; }
.frc-bar__fill { height: 100%; width: 0%; background: var(--color-primary); transition: width 100ms linear; }
.frc-bar__fill--level { background: var(--color-secondary); }

.frc-status {
  margin-top: var(--space-md); font-size: 0.86rem; color: var(--color-text-muted);
  line-height: 1.5; text-align: center; min-height: 1.2em;
}

/* Controls grid */
.frc-controls {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md);
  margin-top: var(--space-lg);
}
.frc-field { min-width: 0; }
.frc-select {
  width: 100%; padding: 10px 12px; background: var(--color-bg); color: var(--color-text);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-family: var(--font-mono); font-size: 0.92rem;
}
.frc-select:focus-visible, .frc-range:focus-visible {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(0, 255, 65, 0.18);
}
.frc-rangewrap { display: flex; align-items: center; gap: var(--space-sm); }
.frc-range { flex: 1; accent-color: var(--color-primary); min-width: 0; }
.frc-rangeval { font-family: var(--font-mono); color: var(--color-primary); min-width: 56px; text-align: right; }

/* Toggle row + export */
.frc-toggles {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-md);
  margin-top: var(--space-lg);
}
.frc-check {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--color-text); font-size: 0.88rem;
}
.frc-check input { width: 18px; height: 18px; accent-color: var(--color-primary); }
.frc-export { display: flex; gap: var(--space-sm); margin-left: auto; }

/* Numeric readouts */
.frc-readouts {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md);
  margin-top: var(--space-lg);
}
.frc-stat {
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface); padding: var(--space-sm) var(--space-md);
}
.frc-stat__label { display: block; font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-text-muted); }
.frc-stat__value { display: block; font-family: var(--font-mono); font-size: 1.05rem; color: var(--color-primary); margin-top: 2px; }

/* Curve table */
.frc-table-h { font-size: 0.95rem; color: var(--color-primary); margin: var(--space-lg) 0 var(--space-sm); }
.frc-table-note { font-size: 0.78rem; color: var(--color-text-muted); margin: 0 0 var(--space-sm); line-height: 1.5; }
.frc-table-wrap { max-height: 340px; overflow-y: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.frc-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 0.82rem; }
.frc-table th, .frc-table td { padding: 7px 12px; text-align: right; border-bottom: 1px solid var(--color-border); }
.frc-table th:first-child, .frc-table td:first-child { text-align: left; }
.frc-table thead th {
  position: sticky; top: 0; background: var(--color-bg-alt); color: var(--color-secondary);
  font-weight: 600; z-index: 1;
}
.frc-table tbody td { color: var(--color-text); }
.frc-table tbody tr:nth-child(even) { background: rgba(255, 255, 255, 0.02); }
.frc-table td.frc-table__empty { text-align: center; color: var(--color-text-muted); padding: var(--space-md); }
.frc-dev--hi { color: var(--color-error); }
.frc-dev--lo { color: var(--color-warning); }

/* Responsive */
@media (max-width: 768px) {
  .frc-controls { grid-template-columns: 1fr 1fr; }
  .frc-readouts { grid-template-columns: 1fr 1fr; }
  .frc-meters { grid-template-columns: 1fr; }
  .frc-export { margin-left: 0; width: 100%; }
  .frc-export .btn { flex: 1; }
}
@media (max-width: 520px) {
  .frc-controls { grid-template-columns: 1fr; }
  .frc-readouts { grid-template-columns: 1fr; }
  #frc-canvas { height: 360px; }
}