#bowltune-app {
  color-scheme: dark;
  --bg: #17120d;
  --panel: #241a12;
  --panel-2: #2e2118;
  --panel-raised: #38281c;
  --track: #4a3624;
  --accent: #dfa94e;
  --accent-2: #d06f37;
  --text: #f7efe4;
  --text-dim: #bca990;
  --danger: #e86b86;
  --on-accent: #201304;
  --grid: rgba(238, 218, 183, 0.12);
  --spectrum-bg: #15100c;
  --spectrum-line: #ffd175;
  --spectrum-hold: #ff8a4c;
  --shadow: 0 12px 34px rgba(0, 0, 0, 0.2);
  --radius: 16px;
}

#bowltune-app[data-theme="midnight"] {
  --bg: #080d15;
  --panel: #0e1622;
  --panel-2: #131e2c;
  --panel-raised: #19283a;
  --track: #263a4e;
  --accent: #5ee7f2;
  --accent-2: #2a91ff;
  --text: #edf8ff;
  --text-dim: #8da8bd;
  --danger: #ff6685;
  --on-accent: #03131a;
  --grid: rgba(115, 207, 236, 0.12);
  --spectrum-bg: #070c13;
  --spectrum-line: #5ee7f2;
  --spectrum-hold: #2a91ff;
  --shadow: 0 14px 38px rgba(0, 0, 0, 0.32);
}

#bowltune-app[data-theme="aurora"] {
  --bg: #071814;
  --panel: #0d241e;
  --panel-2: #123129;
  --panel-raised: #173d34;
  --track: #285146;
  --accent: #5ee6a8;
  --accent-2: #2fb8a0;
  --text: #ecfff7;
  --text-dim: #93bcae;
  --danger: #ff758c;
  --on-accent: #052018;
  --grid: rgba(105, 231, 176, 0.12);
  --spectrum-bg: #06130f;
  --spectrum-line: #65f0b3;
  --spectrum-hold: #30cbb2;
  --shadow: 0 14px 38px rgba(0, 0, 0, 0.28);
}

#bowltune-app[data-theme="indigo"] {
  --bg: #100d20;
  --panel: #18142d;
  --panel-2: #211b3c;
  --panel-raised: #2c2450;
  --track: #3b3263;
  --accent: #aa8cff;
  --accent-2: #6b5cff;
  --text: #f6f2ff;
  --text-dim: #aba0ca;
  --danger: #ff7195;
  --on-accent: #160d2b;
  --grid: rgba(176, 151, 255, 0.12);
  --spectrum-bg: #0d0a1a;
  --spectrum-line: #bca6ff;
  --spectrum-hold: #7065ff;
  --shadow: 0 14px 38px rgba(0, 0, 0, 0.3);
}

#bowltune-app[data-theme="studio"] {
  color-scheme: light;
  --bg: #f2f4f6;
  --panel: #ffffff;
  --panel-2: #edf1f4;
  --panel-raised: #e4eaee;
  --track: #d6dfe5;
  --accent: #a97216;
  --accent-2: #315f86;
  --text: #17232c;
  --text-dim: #60717e;
  --danger: #c93f5d;
  --on-accent: #ffffff;
  --grid: rgba(44, 73, 94, 0.12);
  --spectrum-bg: #f8fafb;
  --spectrum-line: #a97216;
  --spectrum-hold: #315f86;
  --shadow: 0 12px 32px rgba(32, 50, 62, 0.1);
}

#bowltune-app, #bowltune-app * { box-sizing: border-box; }

/* author display rules (flex/grid) must never override the hidden attribute */
#bowltune-app [hidden] { display: none !important; }

#bowltune-app {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background-color 0.28s ease, color 0.28s ease;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: left;
  margin-bottom: 20px;
}
.logo {
  height: 64px;
  width: 64px;
  object-fit: contain;
  filter: drop-shadow(0 3px 8px rgba(0, 0, 0, 0.2));
}
.topbar h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.02em;
}
.subtitle {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.tabs {
  display: flex;
  gap: 8px;
  max-width: 720px;
  margin: 0 auto 16px;
  padding: 0 20px;
}
.tab-btn {
  flex: 1;
  padding: 10px 14px;
  border: none;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}
.tab-btn.active { background: var(--accent); color: var(--on-accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

#bowltune-app section {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  transition: background-color 0.28s ease, border-color 0.28s ease;
}

.bowl-panel { text-align: center; }

.front-language-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 430px;
  margin: 0 auto 16px;
  padding: 8px;
  border: 1px solid var(--track);
  border-radius: 14px;
  background: var(--panel-2);
}
.front-language-label {
  padding-left: 5px;
  color: var(--text-dim);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.front-language-switch .language-choice {
  flex: 1;
  gap: 6px;
}
.front-language-switch .language-option {
  min-height: 42px;
  padding: 6px 32px 6px 7px;
  border-radius: 9px;
  background: var(--panel);
}
.front-language-switch .language-option > span {
  width: 27px;
  height: 27px;
  border-radius: 7px;
  font-size: 0.66rem;
}
.front-language-switch .language-option strong { font-size: 0.8rem; }
.front-language-switch .language-option b { right: 8px; width: 19px; height: 19px; font-size: 0.72rem; }

.bowl-visual {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto 16px;
}
.bowl-photo {
  position: relative;
  width: 100%;
  display: block;
  filter: drop-shadow(0 10px 22px rgba(0, 0, 0, 0.45));
  transition: transform 0.4s ease;
}
.bowl-visual.listening .bowl-photo {
  animation: bowl-breathe 2.4s ease-in-out infinite;
}
@keyframes bowl-breathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.025); }
}

/* warm glow blooming behind the bowl while listening */
.bowl-visual::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent) 0%, transparent 65%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.bowl-visual.listening::before {
  opacity: 0.35;
  animation: glow-pulse 2.4s ease-in-out infinite;
}
@keyframes glow-pulse {
  0%, 100% { opacity: 0.2; transform: scale(0.96); }
  50%      { opacity: 0.45; transform: scale(1.06); }
}

.bowl-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

#progressRing {
  transition: stroke-dashoffset 0.1s linear;
  opacity: 0;
}
.bowl-visual.listening #progressRing { opacity: 1; }
.bowl-visual.listening.free #progressRing { opacity: 0; }

.ripple {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  opacity: 0;
  transform-origin: 112px 123px;
}

/* chakra pin dropping into the bowl once a match is found */
.chakra-pin {
  opacity: 0;
  transform: translateY(-18px);
  pointer-events: none;
}
.chakra-pin.show {
  animation: pin-drop 0.55s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes pin-drop {
  0%   { opacity: 0; transform: translateY(-26px); }
  70%  { opacity: 1; transform: translateY(3px); }
  100% { opacity: 1; transform: translateY(0); }
}
.pin-pct {
  font-size: 11px;
  font-weight: 800;
  fill: #ffffff;
}
.pin-name {
  font-size: 13px;
  font-weight: 700;
  fill: var(--text);
  letter-spacing: 0.03em;
}
.bowl-visual.listening .ripple { animation: ripple-out 1.8s ease-out infinite; }
.bowl-visual.listening #ripple2 { animation-delay: 0.5s; }
.bowl-visual.listening #ripple3 { animation-delay: 1s; }

@keyframes ripple-out {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.7); opacity: 0; }
}
@keyframes mallet-strike {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-14deg); }
}

.mic-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: none;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}
.mic-btn:hover { transform: translateY(-1px); }
.mic-btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }
.mic-btn.active {
  background: var(--accent-2);
  color: var(--on-accent);
}
.mic-btn svg { flex-shrink: 0; }

.status {
  margin: 12px 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
  min-height: 1.2em;
}

.note-display { text-align: center; margin-top: 16px; }
.note-name {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}
.note-detail {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 6px;
  font-size: 1.1rem;
  color: var(--text-dim);
}
.cents { font-variant-numeric: tabular-nums; }
.cents.in-tune { color: var(--accent); font-weight: 600; }
.cents.sharp { color: var(--accent-2); }
.cents.flat { color: var(--danger); }

.chakra-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--panel-2);
  font-size: 0.85rem;
  color: var(--text-dim);
}
.chakra-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--track);
  flex-shrink: 0;
}
.chakra-badge-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
  flex-shrink: 0;
}
.chakra-label { font-weight: 600; color: var(--text); }
.partial-row .chakra-tag {
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* ---- Yoga chakra map ---- */
.chakra-map-panel h2 {
  margin: 0 0 14px;
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 600;
}
.chakra-map-wrap {
  position: relative;
  max-width: 460px;
  margin: 0 auto;
}
.chakra-map-img {
  width: 100%;
  display: block;
  border-radius: 16px;
}
.chakra-map-icons,
.chakra-map-glows {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.chakra-map-icons { z-index: 2; }
.chakra-map-glows { z-index: 1; }
.chakra-map-icon {
  position: absolute;
  width: 10.5%;
  aspect-ratio: 1;
  object-fit: contain;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 1px 3px rgba(0,0,0,0.22));
  will-change: transform, opacity, filter;
  backface-visibility: hidden;
  transform-origin: center;
}
.chakra-map-icon.lit {
  z-index: 3;
  animation: chakra-icon-pulse 1.05s ease-in-out infinite;
}
@keyframes chakra-icon-pulse {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    filter: brightness(1) drop-shadow(0 1px 3px rgba(0,0,0,0.22));
  }
  50% {
    transform: translate(-50%, -50%) scale(1.24);
    opacity: 0.48;
    filter: brightness(1.45) drop-shadow(0 0 10px var(--icon-glow));
  }
}
.chakra-map-glow {
  position: absolute;
  width: 12%;
  aspect-ratio: 1;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.chakra-map-glow.lit {
  opacity: 1;
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
  box-shadow: 0 0 28px 10px var(--glow-color);
  animation: chakra-glow-pulse 1.6s ease-in-out infinite;
}
@keyframes chakra-glow-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.85; }
  50%      { transform: translate(-50%, -50%) scale(1.18); opacity: 1; }
}

.chakra-legend-panel h2 {
  margin: 0 0 14px;
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 600;
}
.chakra-legend {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(78px, 1fr));
  gap: 10px;
}
.chakra-legend-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 6px;
  border-radius: 12px;
  background: var(--panel-2);
  border: 2px solid transparent;
  text-align: center;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.chakra-legend-icon {
  display: block;
  width: 52px;
  height: 52px;
  object-fit: contain;
}
.chakra-legend-item .chakra-legend-name {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
  line-height: 1.2;
}
.chakra-legend-item.matched {
  border-color: var(--legend-color, var(--accent));
  background: var(--panel);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 4px 14px rgba(0,0,0,0.2);
}
.chakra-legend-item.matched .chakra-legend-name { color: var(--text); }
.chakra-legend-item .chakra-legend-pct {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--legend-color, var(--accent));
}

.chakra-match-card {
  margin: 20px auto 0;
  max-width: 320px;
  padding: 20px;
  border-radius: 16px;
  background: var(--panel-2);
  border: 1px solid var(--track);
}
.chakra-match-label {
  margin: 0 0 4px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.chakra-match-icon {
  display: block;
  width: 86px;
  height: 86px;
  object-fit: contain;
  margin: 2px auto 8px;
  filter: drop-shadow(0 3px 10px rgba(0,0,0,0.18));
}
.chakra-match-name {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.chakra-match-percentage {
  font-size: 2.4rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}
.chakra-match-bar-track {
  height: 10px;
  border-radius: 5px;
  background: var(--track);
  overflow: hidden;
}
.chakra-match-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 5px;
  transition: width 0.4s ease;
}

.partials-panel h2, .spectrum-panel h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 600;
}
.hint { font-weight: 400; font-size: 0.85rem; }

.partials-list { display: flex; flex-direction: column; gap: 8px; }
.empty-hint { color: var(--text-dim); font-size: 0.9rem; margin: 0; }

.partial-row {
  display: grid;
  grid-template-columns: 48px 1fr 90px 60px;
  align-items: center;
  gap: 12px;
  background: var(--panel-2);
  border-radius: 10px;
  padding: 8px 12px;
}
.partial-row .idx {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.partial-row .note-cell { display: flex; flex-direction: column; line-height: 1.15; }
.partial-row .note {
  font-weight: 700;
  font-size: 1.1rem;
}
.partial-row .bar-track {
  grid-column: 1 / -1;
  height: 6px;
  background: var(--track);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 2px;
}
.partial-row .bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
}
.partial-row .freq {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: right;
}
.partial-row .cents-cell {
  font-size: 0.85rem;
  text-align: right;
  color: var(--text-dim);
}

.spectrum-panel {
  padding: 20px;
  overflow: hidden;
}
.spectrum-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.spectrum-heading h2 {
  margin: 0 0 4px;
  color: var(--text);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
.spectrum-heading p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.78rem;
}
.spectrum-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1px solid var(--track);
  border-radius: 999px;
  color: var(--text-dim);
  background: var(--panel-2);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.spectrum-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-dim);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--text-dim) 15%, transparent);
}
.spectrum-panel.is-live .spectrum-status {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 42%, var(--track));
}
.spectrum-panel.is-live .spectrum-live-dot {
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent), 0 0 13px var(--accent);
  animation: spectrum-live-pulse 1.4s ease-in-out infinite;
}
@keyframes spectrum-live-pulse {
  0%, 100% { transform: scale(0.85); opacity: 0.72; }
  50% { transform: scale(1.12); opacity: 1; }
}
.spectrum-readouts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}
.spectrum-readout {
  min-width: 0;
  padding: 9px 11px;
  border: 1px solid color-mix(in srgb, var(--track) 70%, transparent);
  border-radius: 10px;
  background: var(--panel-2);
}
.spectrum-readout span {
  display: block;
  margin-bottom: 3px;
  color: var(--text-dim);
  font-size: 0.64rem;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}
.spectrum-readout strong {
  display: block;
  overflow: hidden;
  color: var(--text);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.spectrum-canvas-wrap {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--track);
  border-radius: 13px;
  background: var(--spectrum-bg);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.035), inset 0 -18px 50px rgba(0,0,0,0.08);
}
#spectrum {
  width: 100%;
  height: 250px;
  display: block;
}
.spectrum-idle {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  color: var(--text-dim);
  text-align: center;
  font-size: 0.78rem;
  pointer-events: none;
  background: radial-gradient(circle at 50% 55%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 42%);
}
.spectrum-idle-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--track);
  border-radius: 50%;
  color: var(--accent);
  font-size: 1.35rem;
  background: var(--panel-2);
}
.spectrum-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 16px;
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 0.67rem;
}
.spectrum-legend span { display: inline-flex; align-items: center; gap: 6px; }
.spectrum-legend i {
  display: inline-block;
  width: 15px;
  height: 2px;
  border-radius: 2px;
}
.legend-spectrum { background: var(--spectrum-line); box-shadow: 0 0 6px var(--spectrum-line); }
.legend-hold { background: var(--spectrum-hold); }

.language-settings-panel h2,
.theme-settings-panel h2,
.listen-settings-panel h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 600;
}
.language-settings-panel > .hint {
  margin: -4px 0 14px;
  color: var(--text-dim);
  line-height: 1.45;
}
.language-choice {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.language-option {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 10px 40px 10px 12px;
  border: 1px solid var(--track);
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  text-align: left;
}
.language-option > span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--panel-raised);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
}
.language-option b {
  position: absolute;
  right: 12px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  opacity: 0;
  transform: scale(0.65);
  transition: 0.18s ease;
}
.language-option[aria-checked="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
}
.language-option[aria-checked="true"] b { opacity: 1; transform: scale(1); }
.language-option:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent); outline-offset: 2px; }
.theme-settings-panel > .hint {
  margin: 0 0 16px;
  color: var(--text-dim);
  line-height: 1.5;
}
.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.theme-option {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--track);
  border-radius: 12px;
  background: var(--panel-2);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}
.theme-option:hover { transform: translateY(-1px); border-color: var(--text-dim); }
.theme-option[aria-checked="true"] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--panel-2));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 13%, transparent);
}
.theme-option:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent); outline-offset: 2px; }
.theme-option > span:nth-child(2) { min-width: 0; }
.theme-option strong,
.theme-option small { display: block; }
.theme-option strong {
  overflow: hidden;
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.theme-option small {
  margin-top: 3px;
  color: var(--text-dim);
  font-size: 0.65rem;
}
.theme-option b {
  display: grid;
  width: 19px;
  height: 19px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.7rem;
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.theme-option[aria-checked="true"] b { opacity: 1; transform: scale(1); }
.theme-swatches {
  display: flex;
  width: 36px;
  height: 36px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 9px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.16);
}
.theme-swatches i { flex: 1; }
.theme-swatches i:nth-child(1) { background: var(--swatch-a); }
.theme-swatches i:nth-child(2) { background: var(--swatch-b); }
.theme-swatches i:nth-child(3) { background: var(--swatch-c); }

.listen-settings-panel h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--text-dim);
  font-weight: 600;
}
.listen-settings-panel .hint {
  margin: 0 0 16px;
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.5;
}
.mode-choice {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}
.mode-option {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel-2);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 600;
}
.mode-option input { accent-color: var(--accent); }
.duration-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.duration-row label { color: var(--text-dim); font-size: 0.9rem; white-space: nowrap; }
.duration-row input[type="range"] { flex: 1; accent-color: var(--accent); }
#durationValue {
  font-variant-numeric: tabular-nums;
  min-width: 2.5em;
  text-align: right;
  font-weight: 700;
}

.settings-panel {
  display: flex;
  align-items: center;
  gap: 12px;
}
.settings-panel label { color: var(--text-dim); font-size: 0.9rem; }
.settings-panel input[type="range"] { flex: 1; }
#a4Value { font-variant-numeric: tabular-nums; min-width: 2.5em; text-align: right; }

@media (max-width: 560px) {
  .app { padding: 18px 12px 44px; }
  .tabs { padding: 0 12px; }
  #bowltune-app section { padding: 16px; }
  .theme-grid { grid-template-columns: 1fr; }
  .spectrum-panel { padding: 14px; }
  .spectrum-heading { gap: 10px; }
  .spectrum-heading p { max-width: 190px; }
  .spectrum-readout { padding: 8px; }
  .spectrum-readout span { font-size: 0.58rem; }
  .spectrum-readout strong { font-size: 0.77rem; }
  #spectrum { height: 220px; }
  .spectrum-legend { gap: 7px 11px; }
  .partial-row { grid-template-columns: 38px 1fr 78px 48px; gap: 8px; padding: 8px; }
  .front-language-switch { display: block; padding: 8px; }
  .front-language-label { display: block; padding: 0 0 7px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  #bowltune-app *, #bowltune-app *::before, #bowltune-app *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}