/* Speaker Frequency Response Test — tool-specific overrides only. SIGNAL generator (no mic). */

/* Shared page-layout helpers used by the explanatory sections (defined per tool page,
   matching the site's other tool pages). */
.content-section { max-width: 800px; margin: 0 auto var(--space-lg); color: var(--color-text); line-height: 1.7; }
.content-section p { margin-bottom: var(--space-sm); }
.content-section ul { margin: var(--space-sm) 0 var(--space-sm) var(--space-lg); }
.content-section li { margin-bottom: 4px; }

.related-tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); max-width: 800px; margin: 0 auto; }
.related-tool-card { display: block; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-md); text-decoration: none; transition: border-color 0.2s, transform 0.2s; text-align: left; }
.related-tool-card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.related-tool-card__title { font-family: var(--font-display); font-size: var(--fs-sm); color: var(--color-primary); margin-bottom: var(--space-xs); }
.related-tool-card__desc { font-size: var(--fs-xs); color: var(--color-text-muted); line-height: 1.5; }

.input-label { display: block; font-size: var(--fs-sm); color: var(--color-text-muted); margin-bottom: var(--space-xs); font-family: var(--font-mono); }

@media (max-width: 768px) { .related-tools-grid { grid-template-columns: 1fr; } }

.sfr-warn-note {
  max-width: 820px; margin: var(--space-md) auto 0;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border); border-left: 4px solid var(--color-secondary);
  border-radius: var(--radius-sm); background: rgba(0, 255, 65, 0.04);
  color: var(--color-text); font-size: 0.9rem; line-height: 1.55; text-align: left;
}
.sfr-warn-note strong { color: var(--color-text-bright); }

.sfr-safe-note {
  max-width: 820px; margin: var(--space-md) auto 0;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid rgba(255, 180, 60, 0.4); border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-sm); background: rgba(255, 180, 60, 0.06);
  color: #ffd9a0; font-size: 0.86rem; line-height: 1.5; text-align: left;
}
.sfr-safe-note strong { color: #ffe9c4; }

/* --- Controls --- */
.sfr-controls { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: flex-end; }
.sfr-field { flex: 1 1 200px; min-width: 160px; }
.sfr-field--wide { flex: 1 1 100%; }
.sfr-select, .sfr-num {
  width: 100%; margin-top: 6px; 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: 0.95rem;
}
.sfr-select:focus, .sfr-num:focus, .sfr-range:focus-visible {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(0, 255, 65, 0.18);
}
.sfr-range { width: 100%; margin-top: 10px; accent-color: var(--color-primary); }
.sfr-rangewrap { display: flex; align-items: center; gap: var(--space-sm); }
.sfr-rangewrap .sfr-range { flex: 1; }
.sfr-rangeval { font-family: var(--font-mono); color: var(--color-primary); min-width: 56px; text-align: right; }

.sfr-check { display: inline-flex; align-items: center; gap: 8px; margin-top: 6px; color: var(--color-text); font-size: 0.92rem; }
.sfr-check input { width: 18px; height: 18px; accent-color: var(--color-primary); }

.sfr-subrow { margin-top: var(--space-md); }

.sfr-guide-h { font-size: 1rem; margin-bottom: var(--space-xs); color: var(--color-primary); }

/* --- Readout / transport --- */
.sfr-readout {
  margin-top: var(--space-lg); padding: var(--space-md);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: #060a08; text-align: center; min-height: 92px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.sfr-readout__main { font-family: var(--font-display, 'Orbitron', sans-serif); font-size: 2.2rem; color: var(--color-primary); line-height: 1.1; }
.sfr-readout__sub { font-family: var(--font-mono); font-size: 0.85rem; color: var(--color-text-muted); }

.sfr-band { margin-top: var(--space-sm); text-align: center; }
.sfr-band__label { display: inline-block; font-family: var(--font-mono); font-size: 0.85rem; color: var(--color-secondary); }

.sfr-progress { margin-top: var(--space-sm); height: 6px; border-radius: var(--radius-full); background: rgba(0, 255, 65, 0.10); overflow: hidden; }
.sfr-progress__bar { height: 100%; width: 0%; background: var(--color-primary); transition: width 120ms linear; }

.sfr-transport { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-top: var(--space-lg); align-items: center; }
.sfr-stepnav { display: flex; gap: var(--space-sm); margin-left: auto; }

.sfr-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; }

/* --- "What you should hear" band guide --- */
.sfr-guide { margin-top: var(--space-lg); max-height: 320px; overflow-y: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.sfr-guide__row { display: grid; grid-template-columns: 150px 1fr; gap: var(--space-md); padding: 12px 14px; border-bottom: 1px solid var(--color-border); }
.sfr-guide__row:last-child { border-bottom: none; }
.sfr-guide__row:nth-child(even) { background: rgba(255, 255, 255, 0.02); }
.sfr-guide__band { font-family: var(--font-mono); color: var(--color-primary); font-size: 0.92rem; }
.sfr-guide__range { display: block; color: var(--color-text-muted); font-size: 0.78rem; margin-top: 2px; }
.sfr-guide__desc { color: var(--color-text); font-size: 0.86rem; line-height: 1.5; }

@media (max-width: 560px) {
  .sfr-guide__row { grid-template-columns: 1fr; gap: 4px; }
  .sfr-readout__main { font-size: 1.7rem; }
  .sfr-stepnav { margin-left: 0; width: 100%; }
  .sfr-stepnav .btn { flex: 1; }
}