/* Channel Balance Tester — tool-specific overrides only. SIGNAL generator (no microphone).
   Also defines the shared-look helper classes this page uses that are not in design-system.css
   (input-label, content-section, faq-question/answer, related-tools-grid/card). */

/* ---- hero caveat note ---- */
.bal-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-muted); font-size: 0.9rem; line-height: 1.55; text-align: left;
}
.bal-warn-note strong { color: var(--color-text); }

/* ---- safe-volume warning ---- */
.bal-safe {
  margin-top: var(--space-md); padding: 8px 12px;
  border: 1px solid rgba(255, 180, 60, 0.35); border-left: 4px solid #ffb43c;
  border-radius: var(--radius-sm); background: rgba(255, 180, 60, 0.06);
  color: #ffd9a0; font-size: 0.84rem; line-height: 1.5;
}

/* ---- shared form-label helper (not in design-system.css) ---- */
.input-label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: var(--fs-sm, 0.9rem); color: var(--color-text-muted);
  margin-bottom: var(--space-xs); font-family: var(--font-mono); gap: var(--space-sm);
}
.bal-label__val { font-family: var(--font-mono); color: var(--color-secondary); font-weight: 600; white-space: nowrap; }

/* ---- controls ---- */
.bal-controls { display: flex; flex-wrap: wrap; gap: var(--space-lg); align-items: flex-end; }
.bal-field { flex: 1 1 220px; min-width: 180px; }
.bal-select {
  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;
}
.bal-select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(0, 255, 65, 0.18); }
.bal-range { width: 100%; margin-top: 8px; accent-color: var(--color-primary); cursor: pointer; }
.bal-range:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 4px; }

/* ---- side radio set (noise mode) ---- */
.bal-sides { display: flex; gap: var(--space-sm); margin-top: 6px; flex-wrap: wrap; }
.bal-sides__opt {
  flex: 1 1 80px; position: relative; display: inline-flex;
}
.bal-sides__opt input { position: absolute; opacity: 0; pointer-events: none; }
.bal-sides__label {
  flex: 1; text-align: center; padding: 8px 10px; cursor: pointer;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-bg); color: var(--color-text-muted);
  font-family: var(--font-mono); font-size: 0.9rem; transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.bal-sides__opt input:checked + .bal-sides__label {
  border-color: var(--color-primary); color: var(--color-primary); background: rgba(0, 255, 65, 0.07);
}
.bal-sides__opt input:focus-visible + .bal-sides__label { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ---- actions ---- */
.bal-actions { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: center; margin-top: var(--space-lg); }

/* ---- status (live region) ---- */
.bal-status {
  margin-top: var(--space-md); padding: 8px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); background: rgba(0, 255, 65, 0.02);
  font-family: var(--font-mono); font-size: 0.86rem; color: var(--color-text); min-height: 1.2em; line-height: 1.5;
}

/* ---- L/R meter (driven by generated gains, NOT a mic) ---- */
.bal-meter {
  margin-top: var(--space-lg); display: flex; gap: var(--space-xl); align-items: flex-end;
  justify-content: center; padding: var(--space-md);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: #060a08;
}
.bal-meter__chan { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.bal-meter__track {
  width: 56px; height: 180px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: rgba(0, 255, 65, 0.04); display: flex; align-items: flex-end; overflow: hidden;
}
.bal-meter__fill {
  width: 100%; height: 0%;
  background: linear-gradient(to top, var(--color-primary-dim), var(--color-primary));
  box-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
  transition: height 60ms linear;
}
.bal-meter__name {
  font-family: var(--font-display); font-size: 1.3rem; color: var(--color-primary); letter-spacing: 0.05em;
}
.bal-meter__caption {
  text-align: center; margin-top: 8px; font-size: 0.76rem; color: var(--color-text-muted); line-height: 1.5;
}

/* ---- prose sections (shared helpers) ---- */
.content-section { max-width: 760px; margin: 0 auto; }
.content-section p { color: var(--color-text); line-height: 1.7; margin-bottom: var(--space-md); }
.content-section strong { color: var(--color-text-bright, var(--color-text)); }

.faq-question { cursor: pointer; font-family: var(--font-display); font-size: 1rem; color: var(--color-primary); padding: var(--space-sm) 0; }
.faq-answer { color: var(--color-text); line-height: 1.65; padding: 0 0 var(--space-sm); }

/* ---- related tools (shared convention) ---- */
.related-tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); max-width: 900px; 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, 0.9rem); color: var(--color-primary); margin-bottom: var(--space-xs); }
.related-tool-card__desc { font-size: var(--fs-xs, 0.8rem); color: var(--color-text-muted); line-height: 1.5; }

/* ---- responsive ---- */
@media (max-width: 640px) {
  .related-tools-grid { grid-template-columns: 1fr; }
  .bal-meter { gap: var(--space-lg); }
  .bal-meter__track { width: 46px; height: 150px; }
}