/* Frequencies — contemplative tone player */

.freq-hero .freq-disclaimer {
  margin: 1.25rem auto 0;
  max-width: 36em;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-style: italic;
}

.freq-layout {
  max-width: 960px;
  display: grid;
  gap: 2.5rem;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

@media (min-width: 800px) {
  .freq-layout {
    grid-template-columns: 1fr 1.15fr;
    align-items: start;
  }
  .freq-about {
    grid-column: 1 / -1;
  }
}

/* —— Breathing visual —— */
.freq-visual-panel {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--rose-soft);
  box-shadow: var(--shadow);
  position: sticky;
  top: 5rem;
}

.breath-stage {
  position: relative;
  width: min(260px, 70vw);
  height: min(260px, 70vw);
  margin: 0.5rem auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.breath-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(201, 168, 108, 0.35);
  pointer-events: none;
}

.breath-ring-outer {
  inset: -8%;
  border-color: rgba(232, 196, 192, 0.45);
}

.breath-ring-mid {
  inset: -4%;
  border-color: rgba(139, 122, 155, 0.25);
}

.breath-circle {
  width: 70%;
  height: 70%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, rgba(255, 254, 251, 0.9) 0%, transparent 45%),
    radial-gradient(circle at 50% 55%, var(--rose) 0%, var(--purple-soft) 55%, var(--purple) 100%);
  box-shadow:
    0 0 40px rgba(201, 168, 108, 0.35),
    0 8px 32px rgba(92, 74, 110, 0.18);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--white);
  transition: transform 0.6s ease, box-shadow 0.6s ease;
  transform: scale(0.92);
}

.breath-stage[data-playing="true"] .breath-circle {
  animation: breath-pulse 8s ease-in-out infinite;
  box-shadow:
    0 0 56px rgba(201, 168, 108, 0.5),
    0 12px 40px rgba(92, 74, 110, 0.22);
}

.breath-stage[data-playing="true"] .breath-ring-outer {
  animation: ring-glow 8s ease-in-out infinite;
}

.breath-hz {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 5vw, 2.35rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.02em;
}

.breath-unit {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-top: 0.25rem;
}

.breath-status {
  font-size: 0.95rem;
  color: var(--text-muted);
  min-height: 1.5em;
}

.timer-display {
  margin-top: 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--purple-deep);
  letter-spacing: 0.04em;
}

@keyframes breath-pulse {
  0%, 100% { transform: scale(0.88); }
  50% { transform: scale(1.05); }
}

@keyframes ring-glow {
  0%, 100% { opacity: 0.45; transform: scale(1); }
  50% { opacity: 0.9; transform: scale(1.04); }
}

@media (prefers-reduced-motion: reduce) {
  .breath-stage[data-playing="true"] .breath-circle,
  .breath-stage[data-playing="true"] .breath-ring-outer {
    animation: none;
  }
  .breath-stage[data-playing="true"] .breath-circle {
    transform: scale(1);
  }
}

/* —— Controls panel —— */
.freq-controls-panel {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--rose-soft);
  box-shadow: var(--shadow);
  padding: 1.75rem 1.5rem 2rem;
}

.freq-intro-tight {
  margin-bottom: 1.25rem;
}

.freq-mode-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
  background: var(--cream);
  padding: 0.3rem;
  border-radius: 999px;
  border: 1px solid var(--rose-soft);
}

.freq-tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.freq-tab:hover {
  color: var(--purple-deep);
}

.freq-tab.is-active {
  background: var(--white);
  color: var(--purple-deep);
  box-shadow: 0 1px 6px rgba(92, 74, 110, 0.1);
}

.freq-tab:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.control-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--purple-deep);
  margin-bottom: 0.45rem;
  letter-spacing: 0.02em;
}

.preset-fieldset {
  border: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.preset-fieldset legend.control-label {
  padding: 0;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.55rem;
}

.preset-btn {
  text-align: left;
  background: var(--cream);
  border: 1px solid var(--rose-soft);
  border-radius: 10px;
  padding: 0.7rem 0.75rem;
  cursor: pointer;
  font-family: inherit;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  color: var(--text);
}

.preset-btn:hover {
  border-color: var(--gold);
  background: var(--rose-soft);
}

.preset-btn.is-selected,
.preset-btn[aria-selected="true"] {
  border-color: var(--gold);
  background: linear-gradient(135deg, var(--rose-soft), var(--cream));
  box-shadow: 0 0 0 2px rgba(201, 168, 108, 0.35);
}

.preset-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.preset-hz {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--purple-deep);
  line-height: 1.2;
}

.preset-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  line-height: 1.35;
}

.control-row {
  margin-bottom: 1.15rem;
}

.custom-hz-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.custom-hz-wrap input[type="number"],
.binaural-inputs input[type="number"] {
  width: 7.5rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--rose);
  border-radius: 8px;
  background: var(--cream);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
}

.custom-hz-wrap input:focus,
.binaural-inputs input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 168, 108, 0.25);
}

.unit-suffix {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.field-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.headphones-note {
  margin-top: 0;
  margin-bottom: 1.25rem;
  text-align: left;
}

.binaural-inputs {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

@media (min-width: 480px) {
  .binaural-inputs {
    grid-template-columns: 1fr 1fr auto;
    align-items: end;
  }
  .binaural-inputs .btn {
    margin-bottom: 1.15rem;
  }
}

/* —— Transport —— */
.transport {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--cream-dark);
}

.play-btn {
  min-width: 8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.play-btn[aria-pressed="true"] {
  background: var(--gold-deep);
  border-color: var(--gold-deep);
}

.play-icon {
  font-size: 0.85rem;
  line-height: 1;
}

/* —— Sliders —— */
.sliders {
  margin-bottom: 0.5rem;
}

.sliders input[type="range"] {
  width: 100%;
  accent-color: var(--purple);
  height: 0.4rem;
  cursor: pointer;
}

.sliders input[type="range"]:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

.toggle-row {
  margin-top: 0.85rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.95rem;
  color: var(--text);
  cursor: pointer;
}

.toggle-label input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--purple);
  cursor: pointer;
}

.toggle-hint {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* —— Timer chips —— */
.timer-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  border: 1px solid var(--rose);
  background: var(--cream);
  color: var(--purple);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.chip:hover {
  background: var(--rose-soft);
}

.chip[aria-pressed="true"] {
  background: var(--purple);
  border-color: var(--purple);
  color: var(--white);
}

.chip:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.freq-about {
  padding-top: 0.5rem;
  border-top: 1px solid var(--cream-dark);
}

.freq-about-body {
  max-width: 40em;
}

.freq-about-body p {
  font-size: 1.05rem;
}

@media (max-width: 799px) {
  .freq-visual-panel {
    position: static;
  }
}