/* =========================================================
   Band Room — air rock connect box
   Standalone page, no engine.js, no genre-flavor.js.
   Pure Tone.js + drum-frames JSON for song playback.
========================================================= */

:root {
  color-scheme: dark;
  --bg: #1a0a14;
  --bg-2: #2a1422;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 184, 122, 0.18);
  --text: #efe6dc;
  --text-sub: #c8b8a8;
  --accent: #ff8866;
  --accent-soft: #ffb39a;
  --accent-glass: #ffd4a8;
  --warn: #ff5566;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Hiragino Sans", "Yu Gothic", sans-serif;
  background:
    radial-gradient(ellipse at top, rgba(255,136,102,0.08), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, #100612 100%);
  color: var(--text);
  min-height: 100vh;
  overscroll-behavior: none;
}

#br-header {
  text-align: center;
  padding: 32px 20px 8px;
  position: relative;
}

/* v86: help button + overlay */
#br-help-toggle {
  position: absolute;
  top: 16px;
  right: 18px;
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255, 184, 122, 0.30);
  background: rgba(255, 184, 122, 0.05);
  color: var(--accent-soft);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

#br-help-toggle:hover {
  background: rgba(255, 184, 122, 0.18);
  color: var(--accent-glass);
}

#br-help-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 4, 10, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

#br-help-overlay[hidden] { display: none; }

#br-help-card {
  max-width: 480px;
  width: 100%;
  background: linear-gradient(180deg, #2a1422 0%, #1a0a14 100%);
  border: 1px solid var(--accent-soft);
  border-radius: 16px;
  padding: 28px 30px;
  color: var(--text);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

#br-help-card h2 {
  margin: 0 0 18px;
  font-size: 18px;
  color: var(--accent-glass);
  letter-spacing: 0.10em;
  font-weight: 600;
}

#br-help-card ul {
  margin: 0 0 18px;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.7;
}

#br-help-card ul strong { color: var(--accent-soft); font-weight: 600; }

#br-help-card p {
  margin: 0 0 18px;
  font-size: 12px;
  color: var(--text-sub);
  line-height: 1.7;
}

#br-help-card kbd {
  display: inline-block;
  padding: 1px 5px;
  margin: 0 1px;
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  font-size: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 184, 122, 0.16);
  border-radius: 3px;
  color: var(--accent-soft);
}

#br-help-close {
  appearance: none;
  background: var(--accent);
  border: 0;
  color: #1a0a14;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.10em;
  padding: 8px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s;
}

#br-help-close:hover { background: var(--accent-soft); }

#br-header h1 {
  font-size: clamp(26px, 5vw, 36px);
  font-weight: 600;
  letter-spacing: 0.18em;
  margin: 0;
  color: var(--accent-glass);
}

.br-subtitle {
  margin: 6px 0 0;
  font-size: 12px;
  opacity: 0.7;
  letter-spacing: 0.08em;
}

#br-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 16px 80px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

#br-band-select {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 8px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: rgba(255, 200, 100, 0.04);
}

#br-band-select button {
  appearance: none;
  background: transparent;
  border: 1px solid rgba(255, 200, 100, 0.20);
  color: rgba(255, 220, 180, 0.78);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.10em;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  min-height: 36px;
  text-transform: uppercase;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

#br-band-select button:hover:not(:disabled) {
  border-color: rgba(255, 220, 180, 0.5);
  color: rgba(255, 240, 220, 1);
}

#br-band-select button:disabled {
  opacity: 0.36;
  cursor: not-allowed;
  font-style: italic;
}

#br-band-select button[aria-pressed="true"] {
  background: rgba(255, 200, 100, 0.22);
  border-color: rgba(255, 200, 100, 0.6);
  color: rgba(255, 245, 220, 1);
}

#br-track-select {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  padding: 10px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
  min-height: 50px;
}

#br-track-select button {
  appearance: none;
  background: transparent;
  border: 1px solid rgba(255, 184, 122, 0.16);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  min-height: 36px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

#br-track-select button:hover:not(:disabled) {
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

#br-track-select button:disabled {
  opacity: 0.32;
  cursor: not-allowed;
}

#br-track-select button[aria-pressed="true"] {
  background: rgba(255, 136, 102, 0.18);
  border-color: var(--accent);
  color: var(--accent-glass);
}

#br-transport {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

#br-play {
  appearance: none;
  background: rgba(255, 136, 102, 0.08);
  border: 1.5px solid var(--accent);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 16px;
  letter-spacing: 0.36em;
  padding: 18px 48px;
  border-radius: 999px;
  cursor: pointer;
  min-width: 200px;
  min-height: 60px;
  transition: background 0.3s, color 0.3s, border-color 0.3s, transform 0.15s;
}

#br-play:hover {
  background: rgba(255, 136, 102, 0.18);
}

#br-play:active {
  transform: scale(0.98);
}

#br-play[data-state="playing"] {
  background: rgba(255, 136, 102, 0.24);
  border-color: var(--accent-soft);
}

#br-song-timeline {
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: min(100%, 520px);
  color: var(--text-sub);
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

#br-song-elapsed,
#br-song-duration {
  min-width: 36px;
  text-align: center;
}

#br-song-seek {
  --br-seek-pct: 0%;
  appearance: none;
  width: 100%;
  min-width: 0;
  height: 24px;
  background: transparent;
  cursor: pointer;
}

#br-song-seek:disabled {
  cursor: default;
  opacity: 0.42;
}

#br-song-seek::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background:
    linear-gradient(90deg,
      rgba(255, 136, 102, 0.95) 0%,
      rgba(255, 136, 102, 0.95) var(--br-seek-pct),
      rgba(255, 255, 255, 0.12) var(--br-seek-pct),
      rgba(255, 255, 255, 0.12) 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 184, 122, 0.10);
}

#br-song-seek::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -4px;
  border-radius: 50%;
  border: 2px solid rgba(255, 230, 210, 0.98);
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 136, 102, 0.14);
}

#br-song-seek::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 184, 122, 0.10);
}

#br-song-seek::-moz-range-progress {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 136, 102, 0.95);
}

#br-song-seek::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 230, 210, 0.98);
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 136, 102, 0.14);
}

#br-meta {
  font-size: 11px;
  color: var(--text-sub);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#br-meta span { color: var(--accent-glass); font-weight: 600; }

/* Section display — inline under START, no separate panel */
#br-section-display {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 6px 10px;
  font-size: 11px;
  color: var(--text-sub);
  letter-spacing: 0.06em;
  margin-top: -2px;
}

#br-section-display .br-mini {
  font-variant-numeric: tabular-nums;
}

#br-section-display #br-section-name,
#br-section-display #br-section-next-name {
  color: var(--accent-glass);
  font-weight: 600;
}

#br-mode {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

.br-radio {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-sub);
  letter-spacing: 0.04em;
}

.br-radio input[type="radio"] {
  cursor: pointer;
  accent-color: var(--accent);
}

#br-stems-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.65;
  flex-basis: 100%;
  text-align: center;
}

#br-stems, #br-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  padding: 12px 16px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

/* Mode-scope hiding: non-active mode is fully removed from the page */
body[data-mode="synth"] [data-scope="stems"] { display: none !important; }
body[data-mode="stems"] [data-scope="synth"] { display: none !important; }

/* Mode pill: 2 buttons side-by-side, no descriptions */
#br-mode label.br-radio {
  border: 1px solid rgba(255, 184, 122, 0.20);
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 184, 122, 0.04);
  transition: background 0.2s, border-color 0.2s;
  font-size: 13px;
}

#br-mode label.br-radio:has(input:checked) {
  border-color: var(--accent);
  background: rgba(255, 136, 102, 0.18);
  color: var(--accent-glass);
}

#br-fm-suggestion {
  width: min(92vw, 520px);
  margin: 2px auto 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--text-sub);
  font-size: 11px;
  letter-spacing: 0.08em;
}

#br-fm-suggestion[hidden] {
  display: none;
}

#br-fm-suggestion-text {
  color: rgba(223, 254, 250, 0.88);
}

#br-fm-suggestion button {
  appearance: none;
  border: 1px solid rgba(143, 255, 245, 0.34);
  background: rgba(143, 255, 245, 0.08);
  color: #dffefa;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.14em;
  border-radius: 999px;
  padding: 6px 11px;
  cursor: pointer;
}

#br-fm-suggestion button:hover {
  border-color: rgba(143, 255, 245, 0.72);
  background: rgba(143, 255, 245, 0.14);
}

#br-mode label.br-radio input[type="radio"] {
  display: none;
}

#br-phrase-trigger {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 16px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

#br-phrase-trigger h3 {
  margin: 0;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  opacity: 0.75;
  font-weight: 500;
}

#br-phrase-trigger .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.55;
  line-height: 1.4;
}

#br-phrase-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.br-phrase-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.br-mode-chip {
  appearance: none;
  background: rgba(255, 184, 122, 0.05);
  border: 1px solid rgba(255, 184, 122, 0.18);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.04em;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.br-mode-chip:hover {
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

.br-mode-chip.active {
  background: rgba(255, 136, 102, 0.22);
  border-color: var(--accent);
  color: var(--accent-glass);
}

.br-phrase-cells {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

#br-phrase-grid button {
  appearance: none;
  background: rgba(255, 184, 122, 0.08);
  border: 1px solid rgba(255, 184, 122, 0.22);
  color: var(--text-sub);
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  font-size: 10px;
  letter-spacing: 0.02em;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  min-width: 44px;
  min-height: 32px;
  position: relative;
  transition: background 0.15s, color 0.15s, transform 0.12s;
}

/* v82: phrase number + qwerty key chip overlay */
#br-phrase-grid .br-phrase-num { display: block; font-weight: 600; }
#br-phrase-grid .br-phrase-key {
  position: absolute;
  top: 1px;
  right: 3px;
  font-size: 8px;
  opacity: 0.55;
  color: var(--accent-soft);
  letter-spacing: 0;
}

#br-phrase-grid button.kbd-flash {
  background: rgba(255, 184, 122, 0.45);
  transform: scale(1.06);
}

#br-phrase-grid button:hover {
  background: rgba(255, 184, 122, 0.22);
  color: var(--accent-glass);
}

#br-phrase-grid button:active {
  background: rgba(255, 184, 122, 0.35);
  transform: scale(0.96);
}

/* v137: drum-floor mic follow */
#br-mic-follow {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.br-mic-follow-buttons {
  display: flex;
  gap: 6px;
}

#br-mic-follow-enable,
#br-mic-follow-disable {
  appearance: none;
  background: rgba(255, 184, 122, 0.08);
  border: 1px solid rgba(255, 184, 122, 0.30);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
}

#br-mic-follow-enable:hover:not(:disabled),
#br-mic-follow-disable:hover:not(:disabled) {
  background: rgba(255, 184, 122, 0.22);
  border-color: var(--accent);
}

#br-mic-follow-enable:disabled,
#br-mic-follow-disable:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#br-mic-follow-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

#br-mic-follow-meter {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  overflow: hidden;
}

#br-mic-follow-bar {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 80ms linear, background 120ms linear;
}

#br-mic-follow label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-sub);
}

#br-mic-follow label > span:first-child { min-width: 60px; }

#br-mic-follow-amount-readout {
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--accent-glass);
}

#br-mic-follow input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  outline: none;
}

#br-mic-follow .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

/* v136: Genre pattern picker */
#br-genre-pick {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-genre-pick-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 6px;
}

.br-genre-pick-btn {
  appearance: none;
  background: rgba(255, 184, 122, 0.08);
  border: 1px solid rgba(255, 184, 122, 0.30);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 9px 12px;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s;
}

.br-genre-pick-btn:hover {
  background: rgba(255, 184, 122, 0.22);
  border-color: var(--accent);
}

.br-genre-pick-btn.is-suggested {
  background: rgba(143, 255, 245, 0.12);
  border-color: rgba(143, 255, 245, 0.72);
  color: #dffefa;
}

.br-genre-pick-btn:active { transform: scale(0.98); }

#br-genre-pick-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

#br-genre-pick-reset {
  appearance: none;
  background: rgba(255, 85, 102, 0.08);
  border: 1px solid rgba(255, 85, 102, 0.30);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  align-self: flex-start;
}

#br-genre-pick-reset:hover:not(:disabled) {
  background: rgba(255, 85, 102, 0.20);
  color: var(--accent-glass);
}

#br-genre-pick-reset:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#br-genre-pick .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

/* v134: AI fill (Magenta DrumsRNN) */
#br-ai-fill {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-ai-fill button {
  appearance: none;
  background: rgba(255, 184, 122, 0.06);
  border: 1px solid rgba(255, 184, 122, 0.30);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

#br-ai-fill button:hover:not(:disabled) {
  background: rgba(255, 184, 122, 0.18);
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

#br-ai-fill button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#br-ai-fill-go {
  background: rgba(255, 136, 102, 0.10) !important;
  border-color: var(--accent) !important;
  color: var(--accent-glass) !important;
}

#br-ai-fill-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

#br-ai-fill label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-sub);
}

#br-ai-fill label > span:first-child { min-width: 80px; }

#br-ai-fill-temp-readout {
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--accent-glass);
}

#br-ai-fill input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  outline: none;
}

#br-ai-fill .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

/* Tier1 #3: MIDI loop import (drum-frames に変換) */
#br-midi-import {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-midi-import button {
  appearance: none;
  background: rgba(255, 184, 122, 0.06);
  border: 1px solid rgba(255, 184, 122, 0.30);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

#br-midi-import button:hover:not(:disabled) {
  background: rgba(255, 184, 122, 0.18);
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

#br-midi-import button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#br-midi-import-go {
  background: rgba(255, 136, 102, 0.10) !important;
  border-color: var(--accent) !important;
  color: var(--accent-glass) !important;
}

#br-midi-import-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

#br-midi-import input[type="file"] {
  font-size: 11px;
  color: var(--text-sub);
}

#br-midi-import .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

#br-midi-import.drag-over {
  outline: 1px dashed var(--accent-soft);
  outline-offset: 4px;
}

/* v76: practice tempo section */
#br-tempo {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-tempo label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-sub);
}

#br-tempo label > span:first-child { min-width: 60px; }
#br-tempo-mult-readout {
  min-width: 44px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--accent-glass);
}

#br-tempo input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  outline: none;
}

#br-tempo input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

#br-tempo .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.4;
}

/* v72: looping state — pulse glow when phrase is in active loop */
#br-phrase-grid button.looping {
  background: rgba(255, 136, 102, 0.30);
  border-color: var(--accent);
  color: var(--accent-glass);
  animation: br-loop-pulse 1.6s ease-in-out infinite;
}

@keyframes br-loop-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 136, 102, 0.4); }
  50%      { box-shadow: 0 0 0 4px rgba(255, 136, 102, 0.0); }
}

#br-phrase-grid button.unavailable {
  opacity: 0.3;
  pointer-events: none;
}

#br-phrase-grid .br-phrase-empty {
  font-size: 11px;
  opacity: 0.6;
  font-style: italic;
}

#br-external-vocal {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 16px;
  border: 1px dashed rgba(255, 184, 122, 0.32);
  border-radius: 12px;
  background: rgba(255, 184, 122, 0.05);
  transition: background 0.2s, border-color 0.2s;
}

/* v83: drag-drop highlight */
#br-external-vocal.drag-over {
  background: rgba(255, 184, 122, 0.18);
  border-color: var(--accent);
  border-style: solid;
}

/* v87: per-stem external upload */
#br-external-stems {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-external-stems .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

.br-ext-stem {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: 8px 12px;
  padding: 8px 10px;
  border: 1px dashed rgba(255, 184, 122, 0.24);
  border-radius: 8px;
  background: rgba(255, 184, 122, 0.03);
  transition: background 0.2s, border-color 0.2s;
}

.br-ext-stem.drag-over {
  background: rgba(255, 184, 122, 0.16);
  border-color: var(--accent);
  border-style: solid;
}

.br-ext-stem strong {
  color: var(--accent-glass);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.br-ext-stem input[type="file"] {
  font-size: 10px;
  color: var(--text-sub);
}

.br-ext-stem label.br-toggle {
  grid-column: 1 / -1;
  padding: 2px 0;
}

.br-ext-stem [id$="-status"] {
  grid-column: 1 / -1;
  font-size: 10px;
  opacity: 0.6;
  color: var(--text-sub);
}

#br-external-vocal h3 {
  margin: 0;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  opacity: 0.75;
  font-weight: 500;
}

#br-external-vocal input[type="file"] {
  color: var(--text-sub);
  font-size: 11px;
  padding: 4px 0;
}

#br-external-vocal label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-sub);
}

#br-external-vocal label span {
  min-width: 60px;
}

#br-external-vocal input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  outline: none;
}

#br-external-vocal input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-glass);
  cursor: pointer;
}

#br-external-vocal #br-external-vocal-status {
  font-size: 10px;
  opacity: 0.6;
  color: var(--text-sub);
}

#br-vocal-fx {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 16px;
  border: 1px solid rgba(255, 184, 122, 0.20);
  border-radius: 12px;
  background: rgba(255, 184, 122, 0.04);
}

#br-vocal-fx h3 {
  margin: 0 0 4px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  opacity: 0.75;
  font-weight: 500;
}

#br-vocal-fx label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-sub);
}

#br-vocal-fx label span {
  min-width: 60px;
  text-transform: uppercase;
}

#br-vocal-fx input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  outline: none;
}

#br-vocal-fx input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-glass);
  cursor: pointer;
}

#br-vocal-fx input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-glass);
  cursor: pointer;
  border: 0;
}

#br-volume-stems {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 20px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

#br-volume-stems label,
#br-volume-stems input[type="range"]::-webkit-slider-thumb,
#br-volume-stems input[type="range"]::-moz-range-thumb {
  /* inherit volume label styles */
}

#br-volume-stems label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-sub);
}

#br-volume-stems label span { min-width: 60px; }

#br-volume-stems input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  outline: none;
}

#br-volume-stems input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

#br-volume-stems input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 0;
}

#br-kit-select {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 16px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

#br-kit-select h3 {
  margin: 0;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  opacity: 0.75;
  font-weight: 500;
}

#br-kit-source-select,
#br-kit-profile-select {
  appearance: none;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--panel-border);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  flex: 1;
}

#br-kit-select label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-sub);
}

#br-kit-select label > span:first-child { min-width: 90px; }

#br-kit-select .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.4;
}

/* v99 + v100: per-voice override grid + preview buttons */
.br-voice-overrides {
  border: 1px solid rgba(255, 184, 122, 0.16);
  border-radius: 6px;
  padding: 0;
  margin: 4px 0;
  background: rgba(0, 0, 0, 0.12);
}

.br-voice-overrides > summary {
  cursor: pointer;
  padding: 6px 10px;
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-sub);
  opacity: 0.85;
  list-style: none;
}

.br-voice-overrides > summary::-webkit-details-marker { display: none; }
.br-voice-overrides > summary::before { content: "▸ "; }
.br-voice-overrides[open] > summary::before { content: "▾ "; }

#br-voice-overrides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 6px 10px;
}

.br-voice-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 6px;
  align-items: center;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-sub);
}

.br-voice-row > span:first-child { opacity: 0.7; }

.br-voice-row select {
  appearance: none;
  background: rgba(0, 0, 0, 0.30);
  border: 1px solid var(--panel-border);
  color: var(--text);
  font-family: inherit;
  font-size: 10px;
  padding: 4px 8px;
  border-radius: 4px;
}

.br-voice-preview,
.br-kit-preview {
  appearance: none;
  background: rgba(255, 184, 122, 0.10);
  border: 1px solid rgba(255, 184, 122, 0.30);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 10px;
  padding: 3px 7px;
  border-radius: 4px;
  cursor: pointer;
  line-height: 1;
}

.br-voice-preview:hover,
.br-kit-preview:hover {
  background: rgba(255, 184, 122, 0.25);
}

#br-voice-overrides-clear {
  margin: 4px 10px 6px;
  appearance: none;
  background: rgba(255, 85, 102, 0.08);
  border: 1px solid rgba(255, 85, 102, 0.30);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
}

#br-voice-overrides-clear:hover {
  background: rgba(255, 85, 102, 0.20);
  color: var(--accent-glass);
}

/* v102: custom URL form */
.br-custom-url {
  border: 1px solid rgba(255, 184, 122, 0.16);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.12);
}

.br-custom-url > summary {
  cursor: pointer;
  padding: 6px 10px;
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-sub);
  opacity: 0.85;
  list-style: none;
}

.br-custom-url > summary::-webkit-details-marker { display: none; }
.br-custom-url > summary::before { content: "▸ "; }
.br-custom-url[open] > summary::before { content: "▾ "; }

#br-custom-kit {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#br-custom-kit label {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 6px;
  align-items: center;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-sub);
}

#br-custom-kit input {
  appearance: none;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--panel-border);
  color: var(--text);
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 11px;
  padding: 5px 8px;
  border-radius: 4px;
}

#br-custom-kit-add {
  appearance: none;
  background: var(--accent);
  border: 0;
  color: #1a0a14;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  align-self: flex-start;
  margin-top: 4px;
}

#br-custom-kit-add:hover { background: var(--accent-soft); }

#br-custom-kit-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
}

#br-custom-kit .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.55;
  line-height: 1.4;
}

#br-kit-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.65;
}

#br-mode h3 {
  flex-basis: 100%;
  margin: 0 0 4px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  opacity: 0.55;
  font-weight: 500;
}

.br-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-sub);
  letter-spacing: 0.04em;
  padding: 6px 10px;
  border-radius: 6px;
}

/* v105: bulk toggle row (all on / all off / defaults) */
.br-toggle-bulk {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  flex-basis: 100%;
  margin-bottom: 4px;
}

.br-toggle-all {
  appearance: none;
  background: rgba(255, 184, 122, 0.05);
  border: 1px solid rgba(255, 184, 122, 0.22);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 9px;
  letter-spacing: 0.10em;
  padding: 4px 9px;
  border-radius: 999px;
  cursor: pointer;
  text-transform: uppercase;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.br-toggle-all:hover {
  background: rgba(255, 184, 122, 0.20);
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

.br-toggle input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
}

#br-volume,
#br-space {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 20px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

#br-volume label,
#br-space label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-sub);
}

#br-volume label span,
#br-space label span {
  min-width: 60px;
}

#br-volume input[type="range"],
#br-space input[type="range"] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  outline: none;
}

#br-volume input[type="range"]::-webkit-slider-thumb,
#br-space input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

#br-volume input[type="range"]::-moz-range-thumb,
#br-space input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 0;
}

#br-lyrics {
  padding: 16px 20px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: rgba(0,0,0,0.18);
  max-height: 360px;
  overflow-y: auto;
  scroll-behavior: smooth;
}

#br-lyrics-body {
  margin: 0;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

/* v73: per-section lyric blocks with active-state highlight */
.br-lyric-block {
  margin: 0 0 14px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 4px;
  transition: background 0.3s, border-color 0.3s, opacity 0.3s;
  opacity: 0.55;
}

.br-lyric-block.active {
  background: rgba(255, 136, 102, 0.10);
  border-left-color: var(--accent);
  opacity: 1;
}

.br-lyric-marker {
  font-size: 10px;
  color: var(--accent-soft);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 4px;
  font-weight: 500;
}

.br-lyric-block.active .br-lyric-marker {
  opacity: 1;
  color: var(--accent-glass);
}

.br-lyric-text {
  margin: 0;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.6;
  color: inherit;
  white-space: pre-wrap;
  word-break: break-word;
}

.br-lyric-preamble .br-lyric-marker { display: none; }

#br-chord-display {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 20px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
}

#br-chord-display .br-label {
  font-size: 10px;
  text-transform: uppercase;
  opacity: 0.55;
  letter-spacing: 0.18em;
}

#br-chord-display .br-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

#br-footer {
  text-align: center;
  padding: 20px 16px 40px;
  font-size: 11px;
  color: var(--text-sub);
  letter-spacing: 0.08em;
}

#br-footer a {
  color: var(--accent-soft);
  text-decoration: none;
  padding: 0 4px;
}

/* v89: footer groups — clarify Band Room is its own app */
.br-footer-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  white-space: nowrap;
}

.br-footer-label {
  opacity: 0.55;
  font-size: 10px;
  letter-spacing: 0.06em;
  margin-right: 2px;
}

#br-footer a:hover {
  color: var(--accent-glass);
  text-decoration: underline;
}

.br-sep { opacity: 0.4; margin: 0 2px; }

/* v84: SW update notification banner */
#br-sw-update {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(20, 8, 14, 0.92);
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-glass);
  font-size: 12px;
  letter-spacing: 0.06em;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  animation: br-sw-slide-up 0.3s ease-out;
}

@keyframes br-sw-slide-up {
  from { transform: translate(-50%, 30px); opacity: 0; }
  to   { transform: translate(-50%, 0);    opacity: 1; }
}

#br-sw-reload {
  appearance: none;
  background: var(--accent);
  border: 0;
  color: #1a0a14;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s;
}

#br-sw-reload:hover { background: var(--accent-soft); }

#br-sw-dismiss {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text-sub);
  font-size: 14px;
  padding: 0 4px;
  cursor: pointer;
  line-height: 1;
}

#br-sw-dismiss:hover { color: var(--accent-glass); }

/* v79: keyboard shortcut hint in footer */
#br-kbd-hint {
  margin-top: 8px;
  font-size: 9px;
  opacity: 0.45;
  letter-spacing: 0.04em;
}

#br-kbd-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  margin: 0 1px;
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  font-size: 9px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 184, 122, 0.16);
  border-radius: 3px;
  color: var(--accent-soft);
}

/* ===========================================================
   v67 simplified UI — collapsible <details>, tighter main gap
   =========================================================== */

#br-main { gap: 12px; }

.br-details {
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.br-details > summary {
  cursor: pointer;
  padding: 10px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-sub);
  list-style: none;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.15s, color 0.15s;
}

.br-details > summary::-webkit-details-marker { display: none; }

.br-details > summary::after {
  content: "▾";
  opacity: 0.5;
  font-size: 10px;
  transition: transform 0.2s;
}

.br-details[open] > summary::after { transform: rotate(180deg); }

.br-details > summary:hover {
  background: rgba(255, 184, 122, 0.05);
  color: var(--accent-glass);
}

.br-details[open] > summary {
  background: rgba(255, 184, 122, 0.04);
  color: var(--accent-glass);
  border-bottom: 1px solid rgba(255, 184, 122, 0.10);
}

/* Inner section inside <details> — flat, no double border */
.br-details > section {
  border: none !important;
  border-radius: 0 !important;
  background: transparent !important;
  margin: 0;
}

/* h3 inside collapsed sections is now redundant (summary acts as title) */
.br-details > section > h3,
#br-stems > h3,
#br-controls > h3 {
  display: none;
}

/* Tighter mode bar — minimal padding */
#br-mode { padding: 8px 12px; gap: 8px; }

/* Transport: no border on inner section-display */
#br-transport {
  padding: 18px 16px 14px;
}

/* v75: section nav chips — click to jump (seeks Transport + stem buffers) */
#br-section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  margin-top: 8px;
  max-width: 100%;
}

#br-section-nav:empty { display: none; }

#br-section-nav button {
  appearance: none;
  background: rgba(255, 184, 122, 0.04);
  border: 1px solid rgba(255, 184, 122, 0.18);
  color: var(--text-sub);
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  font-size: 9px;
  letter-spacing: 0.04em;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  min-height: 24px;
  text-transform: uppercase;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

#br-section-nav button:hover {
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

#br-section-nav button.active {
  background: rgba(255, 136, 102, 0.22);
  border-color: var(--accent);
  color: var(--accent-glass);
}

/* v95: A/B compare */
#br-ab {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.br-ab-row {
  display: flex;
  gap: 8px;
}

.br-ab-row button {
  appearance: none;
  background: rgba(255, 184, 122, 0.06);
  border: 1px solid rgba(255, 184, 122, 0.24);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  flex: 1;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.br-ab-row button:hover:not(:disabled) {
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

.br-ab-row button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#br-ab-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
}

#br-ab .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

/* v93: master mix preset chips */
#br-master-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
}

.br-master-preset {
  appearance: none;
  background: rgba(255, 184, 122, 0.05);
  border: 1px solid rgba(255, 184, 122, 0.20);
  color: var(--text-sub);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.06em;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  text-transform: lowercase;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.br-master-preset:hover {
  border-color: var(--accent-soft);
  color: var(--accent-glass);
}

.br-master-preset.active {
  background: rgba(255, 136, 102, 0.22);
  border-color: var(--accent);
  color: var(--accent-glass);
}

/* v80: A-B loop visualization on section chips */
#br-section-nav button.loop-a,
#br-section-nav button.loop-b {
  border-color: #ffd66e;
  color: #fff3c8;
  background: rgba(255, 214, 110, 0.15);
}

#br-section-nav button.loop-a::before { content: "A·"; opacity: 0.85; }
#br-section-nav button.loop-b::after  { content: "·B"; opacity: 0.85; }

#br-section-nav button.loop-in-range {
  background: rgba(255, 214, 110, 0.08);
  border-color: rgba(255, 214, 110, 0.40);
}

#br-section-nav button.active.loop-a,
#br-section-nav button.active.loop-b,
#br-section-nav button.active.loop-in-range {
  background: rgba(255, 136, 102, 0.30);
  border-color: var(--accent);
}

/* v71: master RMS meter — thin horizontal bar under section display */
#br-meter {
  width: 80%;
  max-width: 280px;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 6px;
}

#br-meter-fill {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 60ms linear, background 100ms linear;
}

/* v88: MIDI panel */
#br-midi {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-midi-enable {
  appearance: none;
  background: rgba(255, 184, 122, 0.10);
  border: 1px solid var(--accent-soft);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  align-self: flex-start;
  transition: background 0.2s;
}

#br-midi-enable:hover:not(:disabled) {
  background: rgba(255, 184, 122, 0.24);
}

#br-midi-enable:disabled {
  opacity: 0.7;
  cursor: default;
}

#br-midi label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-sub);
}

#br-midi label > span { min-width: 80px; }

#br-midi select {
  flex: 1;
  appearance: none;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--panel-border);
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 6px;
}

#br-midi-status {
  font-size: 10px;
  color: var(--text-sub);
  opacity: 0.65;
}

#br-midi .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

/* v81: live recorder UI */
#br-rec { display: flex; flex-direction: column; gap: 8px; }

#br-rec-toggle {
  appearance: none;
  background: rgba(255, 85, 102, 0.10);
  border: 1.5px solid var(--warn);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.10em;
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  min-height: 40px;
  align-self: flex-start;
  transition: background 0.2s, transform 0.1s;
}

#br-rec-toggle:hover { background: rgba(255, 85, 102, 0.22); }
#br-rec-toggle:active { transform: scale(0.97); }

#br-rec-toggle.rec-active {
  background: rgba(255, 85, 102, 0.34);
  animation: br-rec-pulse 1.4s ease-in-out infinite;
}

@keyframes br-rec-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 85, 102, 0.5); }
  50%      { box-shadow: 0 0 0 6px rgba(255, 85, 102, 0.0); }
}

#br-rec-download {
  color: var(--accent-soft);
  text-decoration: none;
  font-size: 11px;
  padding: 6px 0;
}

#br-rec-download:hover { color: var(--accent-glass); text-decoration: underline; }

/* v90: stems pack export */
#br-stems-pack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#br-stems-pack-toggle {
  appearance: none;
  background: rgba(255, 184, 122, 0.10);
  border: 1.5px solid var(--accent-soft);
  color: var(--accent-glass);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.10em;
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  min-height: 40px;
  align-self: flex-start;
  transition: background 0.2s;
}

#br-stems-pack-toggle:hover { background: rgba(255, 184, 122, 0.24); }

#br-stems-pack-toggle.rec-active {
  background: rgba(255, 85, 102, 0.34);
  border-color: var(--warn);
}

#br-stems-pack-status {
  font-size: 11px;
  color: var(--text-sub);
  opacity: 0.7;
}

#br-stems-pack-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.br-stems-pack-link {
  color: var(--accent-soft);
  text-decoration: none;
  font-size: 11px;
  padding: 4px 0;
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
}

.br-stems-pack-link:hover { color: var(--accent-glass); text-decoration: underline; }

#br-stems-pack .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.5;
}

#br-rec .br-help {
  margin: 0;
  font-size: 10px;
  opacity: 0.6;
  line-height: 1.4;
}

/* v77: spectrum analyzer canvas */
#br-spectrum {
  width: 80%;
  max-width: 280px;
  height: 36px;
  margin-top: 6px;
  display: block;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.20);
  border: 1px solid rgba(255, 184, 122, 0.08);
}

@media (max-width: 540px) {
  #br-main { padding: 8px 12px 60px; gap: 10px; }
  #br-track-select button { font-size: 10px; padding: 7px 10px; }
  #br-chord-display .br-value { font-size: 26px; }
  .br-details > summary { padding: 9px 12px; font-size: 11px; }
  #br-play { font-size: 14px; padding: 14px 36px; min-width: 160px; min-height: 50px; }
  #br-song-timeline { grid-template-columns: auto minmax(120px, 1fr) auto; gap: 8px; }
}

/* v141: master volume bar — always-visible big touch target for car / Bluetooth use.
   Hardware volume buttons on cars can be blocked by Bluetooth A2DP absolute volume;
   this in-page slider bypasses that. Sized generously for finger taps at red lights. */
#br-master-vol-bar {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px 12px;
  margin: 0 auto;
  max-width: 720px;
  background: linear-gradient(180deg, rgba(255, 184, 122, 0.08), rgba(255, 184, 122, 0.02));
  border-top: 1px solid rgba(255, 184, 122, 0.16);
  border-bottom: 1px solid rgba(255, 184, 122, 0.10);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 18px rgba(18, 6, 14, 0.22);
}
#br-master-vol-bar button {
  appearance: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255, 184, 122, 0.35);
  background: rgba(255, 184, 122, 0.10);
  color: var(--accent-soft, #ffb87a);
  font-family: inherit;
  font-size: 22px;
  font-weight: 600;
  cursor: pointer;
  flex: 0 0 auto;
  transition: background 0.15s, transform 0.05s;
}
#br-master-vol-bar button:active {
  background: rgba(255, 184, 122, 0.22);
  transform: scale(0.94);
}
#br-master-vol-bar input[type="range"] {
  flex: 1 1 96px;
  width: 0;
  min-width: 72px;
  height: 36px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}
#br-master-vol-bar input[type="range"]::-webkit-slider-runnable-track {
  height: 10px;
  border-radius: 6px;
  background: linear-gradient(90deg, rgba(255, 184, 122, 0.55) 0%, rgba(255, 184, 122, 0.20) 100%);
  border: 1px solid rgba(255, 184, 122, 0.30);
}
#br-master-vol-bar input[type="range"]::-moz-range-track {
  height: 10px;
  border-radius: 6px;
  background: linear-gradient(90deg, rgba(255, 184, 122, 0.55) 0%, rgba(255, 184, 122, 0.20) 100%);
  border: 1px solid rgba(255, 184, 122, 0.30);
}
#br-master-vol-bar input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-soft, #ffb87a);
  border: 2px solid rgba(26, 10, 20, 0.85);
  margin-top: -10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45);
  cursor: grab;
}
#br-master-vol-bar input[type="range"]::-moz-range-thumb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-soft, #ffb87a);
  border: 2px solid rgba(26, 10, 20, 0.85);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45);
  cursor: grab;
}
#br-master-vol-readout {
  flex: 0 0 38px;
  text-align: right;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-soft, #ffb87a);
  letter-spacing: 0.04em;
}
#br-audio-route-status {
  flex: 0 0 auto;
  min-width: 56px;
  padding: 5px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255, 184, 122, 0.18);
  color: var(--text-sub, #bba9a8);
  font-size: 10px;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
body.br-bg-audio #br-audio-route-status {
  border-color: rgba(143, 255, 245, 0.42);
  color: var(--accent-glass, #8ffff5);
}
#br-audio-route-status[data-route="arming"],
#br-audio-route-status[data-route="rearming"] {
  border-color: rgba(255, 214, 128, 0.36);
  color: #ffd680;
}
#br-audio-route-status[data-route="failed"] {
  border-color: rgba(255, 116, 116, 0.40);
  color: #ff8f8f;
}

@media (max-width: 540px) {
  #br-master-vol-bar { padding: 8px 12px 10px; gap: 10px; }
  #br-master-vol-bar button { width: 40px; height: 40px; font-size: 20px; border-radius: 10px; }
  #br-master-vol-bar input[type="range"] { flex: 0 1 42vw; width: 42vw; min-width: 96px; max-width: 180px; }
  #br-master-vol-bar input[type="range"]::-webkit-slider-thumb { width: 26px; height: 26px; }
  #br-master-vol-readout { font-size: 13px; flex-basis: 32px; }
  #br-audio-route-status {
    display: inline-flex;
    flex: 0 0 24px;
    min-width: 24px;
    max-width: 24px;
    padding: 0 3px;
    font-size: 0;
  }
  #br-audio-route-status::before {
    content: "D";
    font-size: 9px;
    line-height: 1;
  }
  #br-audio-route-status[data-route="bridge"]::before { content: "B"; }
  #br-audio-route-status[data-route="arming"]::before,
  #br-audio-route-status[data-route="rearming"]::before { content: "A"; }
  #br-audio-route-status[data-route="failed"]::before { content: "F"; }
}

@media (max-width: 380px) {
  #br-master-vol-bar { padding: 8px 8px 10px; gap: 6px; }
  #br-master-vol-bar button { width: 36px; height: 38px; }
  #br-master-vol-bar input[type="range"] { flex-basis: 40vw; width: 40vw; min-width: 88px; max-width: 150px; }
  #br-master-vol-readout { flex-basis: 28px; font-size: 12px; }
}