/* ============================================================
   style.css — QNTEMPO
   QNAUDIO（style-core.css）のデザイントークン・コンポーネントを
   そのまま踏襲。スマホ専用単一レイアウトのため、PC/SP分割はしない。
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --accent-primary: #3b82f6;
  --accent-secondary: #1d4ed8;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --accent-hover-1: #2563eb;
  --accent-hover-2: #1e40af;
  --font-display: 'Instrument Sans';
  --font-body: 'Instrument Sans';

  --ease-snap: cubic-bezier(0.2, 0, 0, 1);
  --ease-glide: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-pop: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-dismiss: cubic-bezier(0.4, 0, 1, 1);

  --dur-hover: 130ms;
  --dur-press: 100ms;
  --dur-open: 240ms;
  --dur-dismiss: 200ms;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html {
  touch-action: pan-x pan-y;
  height: 100dvh;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  height: 100dvh;
  overflow: hidden;
  background: #0d0d0f;
  color: #f0f0f3;
  font-family: var(--font-body, 'Instrument Sans'), -apple-system, BlinkMacSystemFont, sans-serif;
  margin: 0;
  padding: 24px 24px 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  user-select: none;
}

/* ---------- Header ---------- */
/* ハンバーガーメニュー（左）＋ロゴの並び。QNAUDIO PLAYERのPC版ヘッダー実寸を
   引き続き踏襲する（ロゴサイズ・余白等）。 */
#appHeader {
  width: 100%;
  max-width: 1400px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  position: relative;
  z-index: 200;
  flex-shrink: 0;
}

#appLogo {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 1px;
  margin: 0;
  color: #f0f0f3;
  text-transform: uppercase;
}

#appLogoQN {
  color: var(--accent-primary);
}

#appVersion {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: #6b6b7b;
  text-transform: none;
  vertical-align: middle;
}

.header-btn-wrapper { position: relative; }

/* QNシリーズ共通ハンバーガーメニューのマウント先。
   見た目（ボタン・ポップアップ）は qn-menu.js が fetch する
   qn-menu.css 側で定義される。ここでは配置だけ担当する。 */
#qnMenuMount {
  flex-shrink: 0;
}

/* ---------- Pulse stage — the heart of the app ---------- */
.stage-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin-top: 6px;
}

.stage-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.stage-meta-label {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #55555f;
}

.stage-meta-value {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #f0f0f3;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.stage-meta-total {
  font-size: 13px;
  font-weight: 600;
  color: #55555f;
  margin-left: 3px;
}

/* 拍数プルダウン（タップでポップアップ）。BEATヘッダー行の中にインラインで置く。 */
.meta-inline-btn {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 5px 8px 5px 10px;
  border-radius: 8px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #c8c8d0;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.meta-inline-btn:active { transform: scale(0.95); }
.meta-inline-btn .chevron { width: 14px; height: 14px; fill: currentColor; opacity: 0.6; }

/* ALL 16 / ALL 3 トグル：タップごとに全行の分割を一括で切り替える1ボタン式。 */
.meta-div-toggle-btn {
  padding: 6px 10px;
  border-radius: 8px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #6b6b7b;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
}
.meta-div-toggle-btn:active { transform: scale(0.95); }
.meta-div-toggle-btn.selected {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* プリセットボタン：BEATヘッダー行の右端（ドラムロールの真上）に配置 */
.meta-preset-btn {
  margin-left: auto;
  gap: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.meta-preset-btn svg { width: 14px; height: 14px; fill: currentColor; flex-shrink: 0; }

/* クリアボタン：PRESETボタンのすぐ右隣に配置。全マスをoffに戻す。 */
.meta-clear-btn {
  gap: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.meta-clear-btn svg { width: 14px; height: 14px; fill: currentColor; flex-shrink: 0; }

/* ---------- Step sequencer: table layout ---------- */
/* 各行(段)＝[音色ボタン(ペア、A/B表示・タップで音色+分割をまとめて設定)] +
   [拍ごとのパターン本体]。1行あたり最大4拍分を表示し、5拍目以降は次の行に
   折り返す（1-4拍で1段、5-8拍で1段）。外枠パネルは持たず、画面幅いっぱいに
   広げる。間隔はマス間1px・拍間3px・段間3px。 */
.beats-seq {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 2px 0 16px;
  touch-action: none;
}

.seq-row-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.seq-row {
  display: flex;
  align-items: stretch;
  gap: 6px;
}

/* 左端の音色ボタン。3行とも同じ幅に揃える。 */
.layer-sound-btn {
  flex-shrink: 0;
  width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap);
}
.layer-sound-btn:active { transform: scale(0.94); }
.layer-sound-btn .sound-dot-pair {
  display: flex;
  width: 16px; height: 16px;
  border-radius: 50%;
  overflow: hidden;
}
.layer-sound-btn .sound-dot-pair i {
  flex: 1;
  display: block;
}

/* 本体：1行分（最大4拍）のセルが横一列に並び、余白なく均等に画面幅いっぱいへ
   広がる。拍の境目は3pxの隙間で区切る（マス間の1pxより少し広く、拍の区切りが
   分かりやすいようにする）。 */
.seq-track {
  flex: 1;
  min-width: 0;
  display: flex;
  gap: 3px;
  background: transparent;
}

.seq-beat-cell {
  flex: 1;
  min-width: 0;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  padding: 0;
}

/* ステップ本体：段のマス数（3 or 4）に関わらず、1拍分の幅は常に同じになるよう
   grid-template-columnsをJS側で動的に指定する（LCM(3,4)=12を基準単位とし、
   3マスの行は1マス=4単位、4マスの行は1マス=3単位で描く）。これにより行ごとに
   マス数が違っても、拍の境目は必ず揃う。マス間は1pxの隙間で区切る（背景色で
   ボタンとボタンの間に細い線が見える）。 */
.layer-steps {
  display: grid;
  gap: 1px;
  flex: 1;
  min-width: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.08);
}
.layer-step {
  width: 100%;
  height: 44px;
  min-width: 0;
  border-radius: 0;
  background: #26262f;
  border: none;
  cursor: pointer;
  touch-action: none;
  transition: background 0.1s var(--ease-snap);
}
.layer-step.on {
  background: var(--snd-color, var(--accent-primary));
}

/* 再生中、今鳴っているステップのマスだけ強く光らせる（アプリの主役の瞬間） */
.layer-step.playing {
  box-shadow: inset 0 0 0 2px #fff, 0 0 14px rgba(255,255,255,0.7);
}

/* 今再生中の拍のセルを軽くハイライトする */
.seq-beat-cell.active { background: rgba(59, 130, 246, 0.1); }

.stage-hint {
  text-align: center;
  font-family: var(--font-body, 'Instrument Sans'), sans-serif;
  font-size: 11px;
  color: #55555f;
  margin-top: 4px;
  letter-spacing: 0.1px;
}
.stage-hint-dim { color: #33333c; }

/* ---------- Time / BPM display ---------- */
.time-controls-row {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  flex-shrink: 0;
}

#bpmDisplay {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #ffffff;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  width: 100%;
  justify-content: center;
  text-align: center;
}

#bpmDisplay .bpm-val {
  font-size: 56px;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  line-height: 1;
}

#bpmDisplay .bpm-unit {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #8b8b9e;
}

.tempo-name-row {
  display: flex;
  justify-content: center;
  margin-top: 2px;
  flex-shrink: 0;
}

#tempoName {
  font-family: var(--font-body, 'Instrument Sans'), sans-serif;
  font-style: italic;
  font-size: 14px;
  color: #8b8b9e;
}

/* ---------- BPM stepper + slider ---------- */
.bpm-panel-box {
  margin-top: 14px;
  flex-shrink: 0;
}

.bpm-stepper-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 4px;
}

.step-btn {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #f0f0f3;
  font-size: 24px;
  font-weight: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap), color var(--dur-hover) var(--ease-snap), transform var(--dur-press) var(--ease-snap);
}
.step-btn:active { transform: scale(0.94); background: var(--accent-glow); border-color: var(--accent-primary); color: var(--accent-primary); }

.bpm-preset-grid {
  flex: 1;
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.bpm-preset-btn {
  padding: 10px 2px;
  text-align: center;
  border-radius: 10px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #8b8b9e;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap), color var(--dur-hover) var(--ease-snap), transform var(--dur-press) var(--ease-snap);
}
.bpm-preset-btn:active { transform: scale(0.94); }
.bpm-preset-btn.selected {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ---------- Popups (Time Sig picker / Subdivision picker) ---------- */
.av-popup {
  display: none;
  position: fixed;
  left: 20px;
  right: 20px;
  bottom: 0;
  z-index: 350;
  background: #16161b;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: none;
  border-radius: 20px 20px 0 0;
  padding: 18px 18px calc(18px + env(safe-area-inset-bottom));
  box-shadow: 0 -12px 32px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateY(100%);
  transition: opacity var(--dur-open) var(--ease-dismiss), transform var(--dur-open) var(--ease-dismiss);
}
.av-popup.open {
  display: block;
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--dur-open) var(--ease-pop), transform var(--dur-open) var(--ease-pop);
}

.av-popup-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 340;
  background: rgba(5, 5, 7, 0);
  transition: background var(--dur-open) var(--ease-dismiss);
}
.av-popup-backdrop.open {
  display: block;
  background: rgba(5, 5, 7, 0.6);
  transition: background var(--dur-open) var(--ease-pop);
}

.popup-title {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #6b6b7b;
  margin: 0 0 14px;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 6px;
}

.choice-cell {
  padding: 13px 4px;
  text-align: center;
  border-radius: 12px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #c8c8d0;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap), color var(--dur-hover) var(--ease-snap);
}
.choice-cell.selected {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ---------- 音色ピッカー（段ごと） ---------- */
.sound-choice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 4px;
}
.sound-choice-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 4px 12px;
  border-radius: 12px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap);
}
.sound-choice-cell .sc-dot-pair {
  display: flex;
  width: 20px; height: 20px;
  border-radius: 50%;
  overflow: hidden;
}
.sound-choice-cell .sc-dot-pair i {
  flex: 1;
  display: block;
}
.sound-choice-cell .sc-label {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 11px;
  font-weight: 600;
  color: #8b8b9e;
  text-align: center;
  line-height: 1.2;
}
.sound-choice-cell.selected {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
}
.sound-choice-cell.selected .sc-label { color: var(--accent-primary); }

.popup-subtitle {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #6b6b7b;
  margin: 14px 0 8px;
}

/* 音色ピッカー内の分割選択（16分/8分3連）。この行全体に適用される。 */
.div-choice-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.div-choice-cell {
  padding: 13px 4px;
  text-align: center;
  border-radius: 12px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #c8c8d0;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap), color var(--dur-hover) var(--ease-snap);
}
.div-choice-cell.selected {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ---------- プリセット保存・呼び出しポップアップ ---------- */
.preset-save-row {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}
.preset-name-input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  border-radius: 12px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #f0f0f3;
  font-family: var(--font-body, 'Instrument Sans'), sans-serif;
  font-size: 14px;
}
.preset-name-input::placeholder { color: #55555f; }
.preset-name-input:focus {
  outline: none;
  border-color: var(--accent-primary);
}
.preset-save-btn {
  flex-shrink: 0;
  padding: 0 18px;
  border-radius: 12px;
  background: var(--accent-primary);
  border: none;
  color: #fff;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.preset-save-btn:active { transform: scale(0.96); }

.preset-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 38vh;
  overflow-y: auto;
}
.preset-empty {
  text-align: center;
  padding: 20px 0;
  color: #55555f;
  font-family: var(--font-body, 'Instrument Sans'), sans-serif;
  font-size: 13px;
}
.preset-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 12px 12px 14px;
  border-radius: 12px;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.preset-row-name {
  flex: 1;
  min-width: 0;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: #f0f0f3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}
.preset-row-meta {
  flex-shrink: 0;
  font-family: var(--font-body, 'Instrument Sans'), sans-serif;
  font-size: 10px;
  color: #55555f;
}
.preset-row-delete {
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: #55555f;
  cursor: pointer;
  font-size: 16px;
}
.preset-row-delete:active { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

/* 組み込みプリセット（8 Beat, Shuffle Beat）：常に先頭・削除不可なことが分かるよう、
   アクセントカラーの縁取りとBUILT-INバッジで通常のプリセットと区別する。 */
.preset-row-builtin {
  border-color: rgba(59, 130, 246, 0.3);
  background: rgba(59, 130, 246, 0.06);
  margin-bottom: 4px;
}
.preset-row-badge {
  flex-shrink: 0;
  padding: 3px 7px;
  border-radius: 6px;
  background: var(--accent-glow);
  color: var(--accent-primary);
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.popup-close-btn {
  width: 100%;
  margin-top: 14px;
  padding: 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: none;
  color: #fff;
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 6px 20px var(--accent-glow);
  transition: transform var(--dur-press) var(--ease-snap);
}
.popup-close-btn:active { transform: scale(0.97); }

/* ---------- TAP tempo readout ---------- */
.tap-readout-row {
  display: flex;
  justify-content: center;
  margin-top: 12px;
}
.tap-readout {
  font-family: var(--font-body, 'Instrument Sans'), sans-serif;
  font-size: 11px;
  color: #6b6b7b;
}
.tap-readout b {
  color: var(--accent-primary);
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-weight: 700;
}

/* ---------- Bottom fixed transport (mirrors QNAUDIO top-controls) ---------- */
.top-controls-spacer { flex-shrink: 0; }

.top-controls {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
  background: rgba(13, 13, 15, 0.92);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.4);
}

.top-controls-row { display: flex; gap: 8px; align-items: center; }

.loopbtn {
  flex: 1;
  padding: 12px 0 10px;
  font-size: 20px;
  text-align: center;
  background: #16161b;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  cursor: pointer;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  transition: background var(--dur-hover) var(--ease-snap), border-color var(--dur-hover) var(--ease-snap), transform var(--dur-press) var(--ease-snap), box-shadow var(--dur-press) var(--ease-snap);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.loopbtn svg { width: 22px; height: 22px; fill: currentColor; }
.loopbtn:active { transform: translateY(0) scale(0.96); box-shadow: 0 2px 8px rgba(0,0,0,0.4); }
.loopbtn.active { color: var(--accent-primary); border-color: var(--accent-primary); background: var(--accent-glow); }

.top-controls-btn-label {
  font-family: var(--font-display, 'Instrument Sans'), sans-serif;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: inherit;
  opacity: 0.7;
  line-height: 1;
}

.tripleNavBtn {
  flex: 3;
  display: flex;
  align-items: stretch;
  background: #1c1c24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}
.tripleNavBtn-third {
  flex: 1;
  padding: 12px 0 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: background var(--dur-hover) var(--ease-snap), color var(--dur-hover) var(--ease-snap), transform var(--dur-press) var(--ease-snap);
}
.tripleNavBtn-center { flex: 1.3; color: var(--accent-primary); }
.tripleNavBtn-third:active { transform: scale(0.94); background: #2a2a35; }
.tripleNavBtn-third svg { width: 22px; height: 22px; fill: currentColor; }
.tripleNavBtn-left { border-radius: 14px 0 0 14px; }
.tripleNavBtn-right { border-radius: 0 14px 14px 0; }
.tripleNavBtn-divider { width: 1px; background: rgba(255, 255, 255, 0.1); flex-shrink: 0; }

#playToggle {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: none;
  box-shadow: 0 6px 20px var(--accent-glow);
  color: #fff;
}
#playToggle.playing {
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.35);
}

/* ---------- Accent-editing hint pulse on long-press ---------- */
.beat-dot.editing {
  animation: editingPulse 0.4s var(--ease-pop);
}
@keyframes editingPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}