/* ── Tokens ──────────────────────────────────── */
:root {
  --bg:         #f0f2f8;
  --card:       #ffffff;
  --card2:      #f6f7fb;
  --border:     #e2e6f0;
  --text:       #111827;
  --text2:      #6b7280;
  --text3:      #b0b8cc;
  --accent:     #5b5ef4;
  --accent-h:   #4346e0;
  --accent-bg:  #edeffe;
  --warn:       #f59e0b;
  --warn-bg:    #fef3c7;
  --ghost:      #94a3b8;
  --danger:     #ef4444;
  --danger-h:   #dc2626;
  --green:      #22c55e;
  --sh-lg: 0 20px 48px rgba(0,0,0,.08), 0 6px 18px rgba(0,0,0,.05);
  --sh-sheet: 0 -8px 32px rgba(0,0,0,.12);
}
[data-theme="dark"] {
  --bg:         #0b0f1a;
  --card:       #141928;
  --card2:      #1a2035;
  --border:     #26304a;
  --text:       #e8edf8;
  --text2:      #7b8db0;
  --text3:      #3d4f70;
  --accent:     #7c7ff5;
  --accent-h:   #5b5ef4;
  --accent-bg:  #181b42;
  --warn:       #fbbf24;
  --warn-bg:    #29200a;
  --ghost:      #4a5a78;
  --danger:     #f87171;
  --danger-h:   #ef4444;
  --green:      #4ade80;
  --sh-lg: 0 20px 48px rgba(0,0,0,.5), 0 6px 18px rgba(0,0,0,.3);
  --sh-sheet: 0 -8px 32px rgba(0,0,0,.4);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Beat indicator ── */
.beat-indicator {
  display: flex; gap: 5px; padding: 14px 20px 12px;
  justify-content: center; align-items: center;
  border-bottom: 1.5px solid var(--border);
  background: var(--card2); min-height: 52px;
}
.beat-block {
  flex: 1; max-width: 44px; height: 32px; border-radius: 7px;
  transition: transform .06s, box-shadow .06s, background .06s;
}
.beat-block.lv-strong { background: var(--warn-bg); border: 1.5px solid var(--warn); }
.beat-block.lv-normal { background: var(--border); border: 1.5px solid transparent; }
.beat-block.lv-ghost  { background: var(--border); opacity: .45; border: 1.5px solid transparent; }
.beat-block.lv-mute   { background: var(--border); opacity: .18; border: 1.5px solid transparent; }
.beat-block.lit.lv-strong { background: var(--warn);   border-color: var(--warn);   transform: scaleY(1.12); box-shadow: 0 0 14px color-mix(in srgb,var(--warn) 60%,transparent); }
.beat-block.lit.lv-normal { background: var(--accent); border-color: var(--accent); transform: scaleY(1.12); box-shadow: 0 0 14px color-mix(in srgb,var(--accent) 55%,transparent); }
.beat-block.lit.lv-ghost  { background: var(--ghost);  opacity: 1; transform: scaleY(1.08); }
.beat-block.lit.lv-mute   { opacity: .45; transform: scaleY(1.05); }

/* ── Body ── */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 24px 16px 40px;
  transition: background .25s, color .25s;
}

/* ── Card ── */
.card {
  width: 100%; max-width: 460px;
  margin: 0 auto;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--sh-lg);
  transition: background .25s, border-color .25s;
}
.card:has(#panelPractice.active),
.card:has(#panelTranscription.active) { max-width: 1040px; }

/* ── Card header ── */
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px 13px;
  border-bottom: 1.5px solid var(--border);
}
.logo { display: flex; align-items: center; gap: 7px; font-size: 15px; font-weight: 700; color: var(--accent); }

/* Theme switch */
.theme-wrap { display: flex; align-items: center; gap: 5px; cursor: pointer; user-select: none; -webkit-user-select: none; }
.theme-wrap .lbl { font-size: 11px; color: var(--text3); }
.sw-track { width: 38px; height: 20px; border-radius: 10px; background: var(--border); position: relative; transition: background .3s; flex-shrink: 0; }
.sw-track.on { background: var(--accent); }
.sw-thumb { width: 14px; height: 14px; background: #fff; border-radius: 50%; position: absolute; top: 3px; left: 3px; transition: transform .3s; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.sw-track.on .sw-thumb { transform: translateX(18px); }

/* ── Main tabs ── */
.app-tabs {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 6px;
  padding: 10px 12px;
  background: var(--card2);
  border-bottom: 1.5px solid var(--border);
}
.app-tab {
  height: 36px; border-radius: 10px;
  border: 1.5px solid transparent; background: transparent;
  color: var(--text2); font-size: 13px; font-weight: 700;
  cursor: pointer; transition: all .15s; touch-action: manipulation;
}
.app-tab:hover:not(.active) { color: var(--text); background: var(--card); }
.app-tab.active {
  background: var(--card); color: var(--accent);
  border-color: var(--border);
  box-shadow: 0 4px 10px rgba(0,0,0,.04);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ── Inner body ── */
.body { padding: 14px 20px 22px; }

/* BPM section */
.bpm-row { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 4px; }
.adj {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1.5px solid var(--border); background: var(--card2);
  color: var(--text2); font-size: 20px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s; user-select: none; touch-action: manipulation; flex-shrink: 0;
}
.adj:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.adj:active { transform: scale(.86); }
.bpm-center { text-align: center; }
.bpm-num {
  display: inline-block; font-size: 64px; font-weight: 800;
  letter-spacing: -4px; line-height: 1; color: var(--text);
  min-width: 170px; border-radius: 8px; padding: 0 4px;
  cursor: text; outline: none; caret-color: var(--accent);
  transition: color .15s;
}
.bpm-num:hover { color: var(--accent); }
.bpm-num:focus { color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.bpm-sub { font-size: 10px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--text3); margin-top: 1px; display: block; }

/* Slider */
.slider-wrap { margin-bottom: 16px; }
.slider-marks { display: flex; justify-content: space-between; font-size: 10px; font-weight: 500; color: var(--text3); margin-bottom: 4px; }
input[type="range"] { width: 100%; -webkit-appearance: none; appearance: none; height: 5px; border-radius: 3px; outline: none; cursor: pointer; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 3px solid var(--card); box-shadow: 0 2px 6px color-mix(in srgb,var(--accent) 40%,transparent); transition: transform .15s; }
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: var(--accent); border: 3px solid var(--card); }

/* ── Three config buttons ── */
.config-row {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 8px;
  margin-bottom: 12px;
}
.cfg-btn {
  padding: 11px 8px; border-radius: 12px;
  border: 1.5px solid var(--border); background: var(--card2);
  cursor: pointer; text-align: left;
  transition: all .15s; touch-action: manipulation;
  display: flex; flex-direction: column; gap: 3px;
}
.cfg-btn:hover { border-color: var(--accent); background: var(--accent-bg); }
.cfg-btn:active { transform: scale(.97); }
.cfg-ico { font-size: 18px; line-height: 1; margin-bottom: 2px; }
.cfg-lbl { font-size: 10px; font-weight: 600; letter-spacing: .5px; color: var(--text2); }
.cfg-val { font-size: 13px; font-weight: 700; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cfg-dots { display: flex; gap: 3px; align-items: center; margin-top: 1px; }
.mini-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.mini-dot.l0 { background: var(--warn); }
.mini-dot.l1 { background: var(--accent); }
.mini-dot.l2 { background: var(--ghost); opacity: .6; }
.mini-dot.l3 { background: var(--border); }

/* ── Subdivision ── */
.sub-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 6px; margin-bottom: 14px; }
.sub-btn {
  padding: 9px 3px 7px; border-radius: 10px;
  border: 1.5px solid var(--border); background: var(--card2);
  color: var(--text2); font-size: 11px; font-weight: 600;
  cursor: pointer; transition: all .15s; text-align: center; line-height: 1.3;
  touch-action: manipulation; display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.sub-ic { display: block; width: 52px; height: 26px; flex-shrink: 0; }
.sub-btn:hover:not(.sel) { border-color: var(--accent); color: var(--text); }
.sub-btn.sel { border-color: var(--accent); background: var(--accent-bg); color: var(--accent); }

.div { height: 1px; background: var(--border); margin: 14px 0; }

/* ── Volume ── */
.vol-row { display: flex; align-items: center; gap: 9px; margin-bottom: 12px; }
.vol-ico { font-size: 14px; color: var(--text3); flex-shrink: 0; }

/* ── Tap & Play ── */
.tap-btn {
  width: 100%; height: 42px; border-radius: 11px;
  border: 1.5px dashed var(--border); background: transparent;
  color: var(--text2); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all .15s; margin-bottom: 10px; touch-action: manipulation;
}
.tap-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.tap-btn:active { transform: scale(.98); }
.tap-btn.flash { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }

.play-btn {
  width: 100%; height: 72px; border-radius: 16px; border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-h));
  color: #fff; font-size: 19px; font-weight: 700;
  cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 10px;
  box-shadow: 0 8px 22px color-mix(in srgb,var(--accent) 36%,transparent);
  transition: transform .18s, box-shadow .18s, background .18s; touch-action: manipulation;
}
.play-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 30px color-mix(in srgb,var(--accent) 46%,transparent); }
.play-btn:active { transform: translateY(1px); }
.play-btn.on { background: linear-gradient(135deg, var(--danger), var(--danger-h)); box-shadow: 0 8px 22px color-mix(in srgb,var(--danger) 36%,transparent); }
.play-btn.on:hover { box-shadow: 0 12px 30px color-mix(in srgb,var(--danger) 46%,transparent); }
.play-ico { font-size: 24px; }

/* ── Card footer ── */
.card-footer {
  text-align: center;
  padding: 8px 20px 12px;
  font-size: 11px; font-weight: 500; letter-spacing: .5px;
  color: var(--text3);
  border-top: 1px solid var(--border);
}

/* ── Practice tab ── */
.practice-panel { padding: 16px 16px 20px; }
.practice-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  margin-bottom: 12px;
}
.practice-kicker {
  font-size: 10px; font-weight: 800; letter-spacing: 1.4px;
  color: var(--accent); margin-bottom: 4px;
}
.practice-head h1 {
  font-size: 21px; line-height: 1.2; letter-spacing: 0; color: var(--text);
}
.practice-badge {
  flex-shrink: 0;
  padding: 5px 9px; border-radius: 999px;
  color: var(--accent); background: var(--accent-bg);
  font-size: 11px; font-weight: 800;
}
.practice-tips {
  display: grid; gap: 6px; margin-bottom: 12px;
}
.practice-tips span {
  padding: 8px 10px; border-radius: 10px;
  background: var(--card2); border: 1px solid var(--border);
  color: var(--text2); font-size: 12px; font-weight: 600;
}
.practice-selectors {
  display: grid; gap: 12px;
  padding: 12px;
  margin-bottom: 12px;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  background: var(--card2);
}
.practice-select-group { display: grid; gap: 7px; }
.practice-select-label {
  color: var(--text3);
  font-size: 10px; font-weight: 800; letter-spacing: 1.2px;
}
.practice-toggle {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 6px;
}
.practice-type,
.practice-option {
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--text2);
  cursor: pointer;
  transition: all .15s;
  touch-action: manipulation;
}
.practice-type {
  height: 36px; border-radius: 10px;
  font-size: 13px; font-weight: 800;
}
.practice-type:hover:not(.active),
.practice-option:hover:not(.active) {
  color: var(--text);
  border-color: var(--accent);
}
.practice-type.active,
.practice-option.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-bg);
}
.practice-options {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 7px;
}
.practice-option {
  min-height: 46px; padding: 7px 6px; border-radius: 10px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  font-size: 11px; font-weight: 800; line-height: 1.2;
  text-align: center;
}
.practice-option-step {
  color: var(--text3);
  font-size: 10px; font-weight: 900;
}
.practice-option.active .practice-option-step { color: var(--accent); }
.practice-detail { min-height: 260px; }
.practice-empty {
  padding: 28px 12px;
  color: var(--text2);
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}
.exercise-note {
  margin-bottom: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  background: var(--accent-bg);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}
.plan-card { margin-bottom: 0; }
.plan-stage {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 5px;
  padding: 3px 7px;
  border-radius: 999px;
  background: var(--accent-bg);
  color: var(--accent);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .5px;
}
.plan-summary {
  display: grid; gap: 8px;
  margin-bottom: 12px;
}
.plan-summary div {
  display: grid; gap: 4px;
  padding: 10px;
  border-radius: 10px;
  background: var(--card2);
  border: 1px solid var(--border);
}
.plan-summary span {
  color: var(--text3);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1px;
}
.plan-summary strong {
  color: var(--text);
  font-size: 12px;
  line-height: 1.45;
}
.plan-cues {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 8px;
  margin-bottom: 12px;
}
.plan-cue {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 8px;
  align-items: center;
  padding: 10px;
  border-radius: 11px;
  background: color-mix(in srgb,var(--accent-bg) 62%,var(--card));
  border: 1px solid color-mix(in srgb,var(--accent) 35%,var(--border));
}
.plan-cue span {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  background: var(--card);
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  text-align: center;
}
.plan-cue p {
  color: var(--text2);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
}
.plan-task-list {
  display: grid; gap: 8px;
}
.plan-task {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px;
  border-radius: 11px;
  background: var(--card2);
  border: 1px solid var(--border);
}
.plan-task div {
  display: grid; gap: 2px;
}
.plan-task strong {
  color: var(--text);
  font-size: 13px;
}
.plan-task span {
  color: var(--text2);
  font-size: 11px;
  font-weight: 700;
}
.knowledge-card { margin-bottom: 0; }
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 9px;
  margin-bottom: 12px;
}
.knowledge-item {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 10px;
  align-items: start;
  padding: 11px;
  border-radius: 12px;
  background: var(--card2);
  border: 1px solid var(--border);
}
.knowledge-mark {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--accent-bg);
  color: var(--accent);
  font-size: 15px;
  font-weight: 900;
  text-align: center;
  line-height: 1.2;
}
.knowledge-item strong {
  display: block;
  color: var(--text);
  font-size: 13px;
  margin-bottom: 4px;
}
.knowledge-item p {
  color: var(--text2);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.45;
}
.knowledge-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.knowledge-actions .use-exercise,
.knowledge-jump {
  padding: 8px 10px;
  border-radius: 9px;
  border: 1.5px solid var(--border);
  background: var(--card2);
  color: var(--text2);
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  transition: all .15s;
}
.knowledge-actions .use-exercise:hover,
.knowledge-jump:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-bg);
}
.exercise-card {
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  padding: 13px;
  margin-bottom: 12px;
}
.exercise-meta {
  display: grid; grid-template-columns: 34px 1fr; gap: 10px;
  align-items: start; margin-bottom: 10px;
}
.exercise-step {
  width: 34px; height: 34px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-bg); color: var(--accent);
  font-size: 13px; font-weight: 800;
}
.exercise-meta h2 {
  font-size: 15px; line-height: 1.25; margin-bottom: 3px;
  color: var(--text);
}
.exercise-meta p {
  color: var(--text2); font-size: 12px; line-height: 1.45;
}
.exercise-actions {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-bottom: 10px;
}
.exercise-actions span {
  color: var(--text3); font-size: 11px; font-weight: 700;
}
.use-exercise {
  flex-shrink: 0;
  padding: 7px 10px; border-radius: 9px;
  border: 1.5px solid var(--border); background: var(--card2);
  color: var(--text2); font-size: 12px; font-weight: 800;
  cursor: pointer; transition: all .15s;
}
.use-exercise:hover {
  color: var(--accent); border-color: var(--accent); background: var(--accent-bg);
}
.drum-score {
  padding: 10px 8px 8px;
  border-radius: 12px;
  background:
    linear-gradient(180deg, color-mix(in srgb,var(--card) 72%,var(--card2)), var(--card2));
  border: 1.5px solid var(--border);
  overflow-x: auto;
}
.drum-score svg {
  display: block;
  min-width: 480px;
}
.drum-score svg,
.drum-score svg text {
  color: var(--text);
  fill: var(--text);
}
.drum-score svg path,
.drum-score svg line,
.drum-score svg rect {
  stroke: var(--text);
}
.drum-score .vf-stavenote path,
.drum-score .vf-notehead path {
  fill: var(--text);
  stroke: var(--text);
}
.drum-score .vf-stave path,
.drum-score .vf-clef path,
.drum-score .vf-timesignature path {
  fill: var(--text);
  stroke: var(--text);
}
.drum-score .vf-beam path {
  fill: var(--text);
}
.drum-score .vf-hi-hat-head line {
  stroke: var(--text);
  stroke-width: 1.9;
  stroke-linecap: round;
}
.drum-score .vf-snare-head path,
.drum-score .vf-kick-head path {
  fill: var(--text);
}
.drum-score .vf-beat-label {
  fill: var(--text3);
  font-size: 10px;
  font-weight: 800;
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
}
.drum-score .vf-sticking {
  font-size: 11px;
  font-weight: 900;
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
}
.drum-score .vf-sticking.right { fill: var(--accent); }
.drum-score .vf-sticking.left { fill: var(--warn); }
.drum-score .vf-accent-mark {
  fill: var(--danger);
  font-size: 16px;
  font-weight: 900;
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
}
.drum-score .notation-error {
  padding: 18px 12px;
  color: var(--danger);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

/* ── Transcription demo ── */
.transcription-panel { padding: 18px; }
.transcription-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  margin-bottom: 14px;
}
.transcription-head h1 {
  color: var(--text); font-size: 22px; line-height: 1.25; letter-spacing: 0;
}
.transcription-head > div > p:last-child {
  margin-top: 5px; color: var(--text2); font-size: 12px; line-height: 1.5;
}
.demo-badge {
  flex-shrink: 0; padding: 6px 9px; border-radius: 7px;
  color: var(--accent); background: var(--accent-bg);
  border: 1px solid color-mix(in srgb,var(--accent) 32%,var(--border));
  font-size: 11px; font-weight: 850;
}
.demo-notice {
  display: grid; grid-template-columns: auto 1fr; gap: 9px; align-items: center;
  margin-bottom: 14px; padding: 10px 12px; border-radius: 10px;
  background: var(--warn-bg); border: 1px solid color-mix(in srgb,var(--warn) 35%,var(--border));
  color: var(--text2); font-size: 11px; line-height: 1.45;
}
.demo-notice strong { color: var(--warn); white-space: nowrap; }
.transcription-workbench {
  display: grid; grid-template-columns: minmax(230px,280px) minmax(0,1fr);
  gap: 14px; align-items: start;
}
.transcription-controls,
.transcription-result {
  border: 1.5px solid var(--border); border-radius: 12px; background: var(--card2);
}
.transcription-controls { padding: 12px; display: grid; gap: 12px; }
.control-section { display: grid; gap: 8px; }
.control-section + .control-section {
  padding-top: 12px; border-top: 1px solid var(--border);
}
.control-eyebrow {
  display: block; color: var(--text3); font-size: 10px; font-weight: 900; letter-spacing: 1px;
}
.audio-drop {
  min-height: 126px; padding: 16px 12px; border-radius: 10px;
  border: 1.5px dashed var(--border); background: var(--card);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  color: var(--text2); text-align: center; cursor: pointer; transition: all .15s;
}
.audio-drop:hover,
.audio-drop.dragging { border-color: var(--accent); background: var(--accent-bg); }
.audio-drop.has-file { border-style: solid; border-color: var(--accent); }
.audio-drop-icon {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  margin-bottom: 3px; background: var(--accent-bg); color: var(--accent);
  font-size: 22px; font-weight: 500; line-height: 1;
}
.audio-drop strong { color: var(--text); font-size: 13px; overflow-wrap: anywhere; }
.audio-drop small { color: var(--text3); font-size: 10px; line-height: 1.4; }
.secondary-action {
  min-height: 36px; padding: 8px 10px; border-radius: 9px;
  border: 1.5px solid var(--border); background: var(--card);
  color: var(--text2); font-size: 11px; font-weight: 800;
  cursor: pointer; transition: all .15s;
}
.secondary-action:hover:not(:disabled) {
  color: var(--accent); border-color: var(--accent); background: var(--accent-bg);
}
.secondary-action:disabled { opacity: .45; cursor: not-allowed; }
.audio-preview { display: none; width: 100%; height: 36px; }
.audio-preview.visible { display: block; }
.field-label { color: var(--text2); font-size: 11px; font-weight: 750; }
.demo-select {
  width: 100%; height: 38px; padding: 0 10px; border-radius: 9px;
  border: 1.5px solid var(--border); background: var(--card); color: var(--text);
  font: inherit; font-size: 12px; font-weight: 700; outline: none;
}
.demo-select:focus { border-color: var(--accent); }
.generate-score {
  min-height: 54px; border: 0; border-radius: 10px;
  background: var(--accent); color: #fff; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  transition: background .15s, transform .15s;
}
.generate-score:hover { background: var(--accent-h); transform: translateY(-1px); }
.generate-score:disabled { opacity: .7; cursor: wait; transform: none; }
.generate-score span { font-size: 13px; font-weight: 850; }
.generate-score small { font-size: 9px; opacity: .8; }
.analysis-progress {
  padding: 10px; border-radius: 10px; background: var(--card); border: 1px solid var(--border);
}
.progress-track { height: 4px; overflow: hidden; border-radius: 4px; background: var(--border); }
.progress-track span {
  display: block; width: 100%; height: 100%; border-radius: inherit; background: var(--green);
  transition: width .3s ease;
}
.progress-copy { display: grid; gap: 2px; margin-top: 7px; }
.progress-copy strong { color: var(--text); font-size: 11px; }
.progress-copy span { color: var(--text3); font-size: 10px; line-height: 1.35; }
.transcription-result { padding: 14px; background: var(--card); }
.result-toolbar {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 14px;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.result-source { color: var(--accent); font-size: 10px; font-weight: 850; }
.result-toolbar h2 { margin-top: 3px; color: var(--text); font-size: 17px; letter-spacing: 0; }
.result-metrics { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.result-metrics span {
  min-width: 58px; padding: 6px 7px; border-radius: 8px;
  background: var(--card2); border: 1px solid var(--border);
  color: var(--text3); font-size: 9px; font-weight: 800; text-align: center;
}
.result-metrics strong { display: block; margin-bottom: 1px; color: var(--text); font-size: 12px; }
.difficulty-row {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 14px;
  padding: 12px 0;
}
.difficulty-row p { max-width: 320px; margin-top: 4px; color: var(--text2); font-size: 11px; line-height: 1.4; }
.difficulty-switch {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 4px;
  padding: 4px; border-radius: 10px; background: var(--card2); border: 1px solid var(--border);
}
.difficulty-btn {
  min-width: 50px; height: 30px; padding: 0 8px; border: 0; border-radius: 7px;
  background: transparent; color: var(--text2); font-size: 11px; font-weight: 800;
  cursor: pointer; transition: all .15s;
}
.difficulty-btn.active { color: #fff; background: var(--accent); }
.score-overview {
  border: 1.5px solid var(--border); border-radius: 11px; overflow: hidden; background: var(--card2);
}
.score-legend {
  display: flex; gap: 14px; align-items: center; padding: 8px 11px;
  border-bottom: 1px solid var(--border); color: var(--text2); font-size: 10px; font-weight: 750;
}
.score-legend span { display: flex; align-items: center; gap: 5px; }
.score-legend i { font-style: normal; }
.legend-x { color: var(--text); font-size: 15px; line-height: 1; }
.legend-dot-note { width: 9px; height: 7px; border-radius: 50%; background: var(--text); transform: rotate(-18deg); }
.legend-dot-note.kick { opacity: .6; }
.transcription-score {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  min-height: 318px; padding: 8px; overflow-x: auto;
}
.transcription-score .drum-score {
  position: relative; min-width: 0; padding: 0; border: 0; background: transparent;
}
.transcription-score .drum-score svg { width: 100%; min-width: 0; height: auto; }
.measure-number {
  position: absolute; top: 8px; right: 9px;
  color: var(--text3); font-size: 9px; font-weight: 900; letter-spacing: .5px;
}
.simplification-summary {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 7px; margin-top: 10px;
}
.simplification-summary div {
  padding: 9px 10px; border-radius: 9px; background: var(--card2); border: 1px solid var(--border);
}
.simplification-summary span { display: block; margin-bottom: 3px; color: var(--text3); font-size: 9px; font-weight: 800; }
.simplification-summary strong { color: var(--text); font-size: 11px; }
.result-actions { display: flex; justify-content: flex-end; gap: 7px; margin-top: 10px; }

/* ── Sheet system ── */
.backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.48);
  z-index: 100; opacity: 0; pointer-events: none; transition: opacity .3s;
}
.backdrop.on { opacity: 1; pointer-events: all; }

.sheet {
  position: fixed; bottom: 0; left: 50%; z-index: 101;
  width: 100%; max-width: 460px;
  background: var(--card); border-top: 1.5px solid var(--border);
  border-radius: 20px 20px 0 0;
  box-shadow: var(--sh-sheet);
  transform: translateX(-50%) translateY(100%);
  transition: transform .32s cubic-bezier(.32,0,.67,0);
  max-height: 88svh; display: flex; flex-direction: column;
}
.sheet.on { transform: translateX(-50%) translateY(0); transition-timing-function: cubic-bezier(.33,1,.68,1); }

.sheet-handle { width: 36px; height: 4px; background: var(--border); border-radius: 2px; margin: 10px auto 0; flex-shrink: 0; }
.sheet-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px 10px; flex-shrink: 0;
}
.sheet-title { font-size: 17px; font-weight: 700; }
.sheet-close {
  width: 28px; height: 28px; border-radius: 50%; border: none;
  background: var(--card2); color: var(--text2); font-size: 16px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all .15s; flex-shrink: 0;
}
.sheet-close:hover { background: var(--border); color: var(--text); }
.sheet-body { padding: 0 20px 36px; overflow-y: auto; flex: 1; }

/* ── Time signature sheet ── */
.ts-display {
  text-align: center; padding: 18px 0 20px;
}
.ts-big {
  display: inline-block;
  font-size: 52px; font-weight: 800; letter-spacing: -2px;
  background: var(--card2); border: 1.5px solid var(--border);
  border-radius: 14px; padding: 8px 28px; color: var(--text);
  min-width: 140px;
}
.ts-controls {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px;
}
.ts-ctrl-group { text-align: center; }
.ts-ctrl-lbl { font-size: 10px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text3); margin-bottom: 8px; display: block; }
.ts-adj-row { display: flex; align-items: center; justify-content: center; gap: 12px; }
.ts-val { font-size: 22px; font-weight: 700; min-width: 36px; text-align: center; }
.ts-btn {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1.5px solid var(--border); background: var(--card2);
  color: var(--text2); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s;
}
.ts-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.ts-btn:active { transform: scale(.88); }
.ts-sep { height: 1px; background: var(--border); margin-bottom: 16px; }
.ts-sec-lbl { font-size: 10px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text3); margin-bottom: 10px; display: block; }
.ts-presets { display: grid; grid-template-columns: repeat(4,1fr); gap: 7px; }
.ts-preset {
  padding: 10px 4px; border-radius: 10px;
  border: 1.5px solid var(--border); background: var(--card2);
  color: var(--text2); font-size: 14px; font-weight: 700;
  cursor: pointer; text-align: center; transition: all .15s;
}
.ts-preset:hover:not(.sel) { border-color: var(--accent); color: var(--text); }
.ts-preset.sel { border-color: var(--accent); background: var(--accent-bg); color: var(--accent); }

/* ── Sound sheet ── */
.sound-list { list-style: none; }
.sound-item {
  display: flex; align-items: center;
  padding: 13px 4px; border-bottom: 1px solid var(--border);
  cursor: pointer; transition: background .12s; border-radius: 8px;
  gap: 12px; margin: 0 -4px;
}
.sound-item:last-child { border-bottom: none; }
.sound-item:hover { background: var(--card2); }
.sound-item:active { background: var(--accent-bg); }
.sound-ico { font-size: 22px; flex-shrink: 0; width: 36px; text-align: center; }
.sound-info { flex: 1; }
.sound-name { font-size: 15px; font-weight: 600; color: var(--text); display: block; }
.sound-desc { font-size: 11px; color: var(--text2); margin-top: 1px; display: block; }
.sound-check {
  width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 13px; color: var(--accent);
  background: var(--accent-bg); border: 1.5px solid var(--accent);
  opacity: 0; transition: opacity .15s;
}
.sound-item.sel .sound-check { opacity: 1; }

/* ── Accent sheet ── */
.accent-legend {
  display: flex; gap: 12px; flex-wrap: wrap;
  padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid var(--border);
}
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 600; color: var(--text2); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

.accent-beats-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.accent-beat-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 12px;
  background: var(--card2); border: 1.5px solid var(--border);
}
.accent-beat-num {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--card); border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--text2); flex-shrink: 0;
}
.accent-levels { display: flex; gap: 5px; flex: 1; }
.al-btn {
  flex: 1; padding: 6px 4px; border-radius: 8px;
  border: 1.5px solid var(--border); background: var(--card);
  color: var(--text2); font-size: 11px; font-weight: 600;
  cursor: pointer; transition: all .15s; text-align: center;
}
.al-btn:hover:not(.sel) { border-color: var(--accent); color: var(--text); }
.al-btn.sel.lv-strong { border-color: var(--warn); background: var(--warn-bg); color: #92400e; }
.al-btn.sel.lv-normal { border-color: var(--accent); background: var(--accent-bg); color: var(--accent); }
.al-btn.sel.lv-ghost  { border-color: var(--ghost); background: color-mix(in srgb,var(--ghost) 12%,transparent); color: var(--ghost); }
.al-btn.sel.lv-mute   { border-color: var(--border); background: var(--card2); color: var(--text3); }
[data-theme="dark"] .al-btn.sel.lv-strong { color: var(--warn); }

.accent-reset {
  width: 100%; padding: 12px; border-radius: 10px;
  border: 1.5px solid var(--border); background: transparent;
  color: var(--text2); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all .15s;
}
.accent-reset:hover { border-color: var(--danger); color: var(--danger); background: color-mix(in srgb,var(--danger) 8%,transparent); }

/* ── Responsive ── */
@media (min-width: 760px) {
  body { padding: 32px 24px 44px; }
  .practice-panel.active {
    display: grid;
    grid-template-columns: minmax(260px, 320px) minmax(0,1fr);
    gap: 14px;
    align-items: start;
  }
  .practice-head,
  .practice-tips {
    grid-column: 1 / -1;
  }
  .practice-selectors,
  .practice-detail {
    margin-bottom: 0;
  }
  .practice-options {
    grid-template-columns: 1fr;
    max-height: 470px;
    overflow-y: auto;
    padding-right: 2px;
  }
  .practice-option {
    min-height: 42px;
    align-items: flex-start;
    text-align: left;
    padding: 8px 10px;
  }
  .practice-detail { min-width: 0; }
  .exercise-card { margin-bottom: 0; }
}
@media (max-width: 520px) {
  .transcription-panel { padding: 14px 12px 18px; }
  .transcription-head h1 { font-size: 18px; }
  .demo-notice { grid-template-columns: 1fr; gap: 3px; }
  .transcription-workbench { grid-template-columns: 1fr; }
  .result-toolbar,
  .difficulty-row { align-items: stretch; flex-direction: column; }
  .result-metrics { justify-content: stretch; }
  .result-metrics span { flex: 1; }
  .difficulty-switch { width: 100%; }
  .difficulty-btn { min-width: 0; padding: 0 4px; }
  .transcription-score { grid-template-columns: 1fr; min-height: 0; }
  .simplification-summary { grid-template-columns: 1fr; }
  .result-actions { flex-direction: column; }
  .practice-toggle { grid-template-columns: repeat(2,1fr); }
  .knowledge-grid { grid-template-columns: 1fr; }
  .knowledge-actions { flex-direction: column; }
  .knowledge-actions .use-exercise,
  .knowledge-jump { width: 100%; }
  .plan-cues { grid-template-columns: 1fr; }
  .plan-cue { grid-template-columns: 54px 1fr; }
  .plan-task { align-items: stretch; flex-direction: column; }
  .plan-task .use-exercise { width: 100%; }
}
@media (max-width: 380px) {
  .app-tab { font-size: 11px; }
  .transcription-head { flex-direction: column; gap: 8px; }
  .bpm-num { font-size: 52px; min-width: 145px; }
  .play-btn { height: 64px; font-size: 17px; }
  .ts-big { font-size: 42px; }
  .al-btn { font-size: 10px; }
  .practice-panel { padding: 14px 12px 18px; }
  .practice-head h1 { font-size: 18px; }
  .practice-toggle { grid-template-columns: 1fr; }
  .practice-options { grid-template-columns: repeat(2,1fr); }
  .practice-option { min-height: 44px; }
  .plan-cue { grid-template-columns: 52px 1fr; }
}