:root {
  --ink: #0d1b34;
  --muted: #667895;
  --line: rgba(111, 132, 160, 0.22);
  --glass: rgba(247, 251, 255, 0.72);
  --glass-strong: rgba(255, 255, 255, 0.88);
  --blue: #2478ff;
  --blue-2: #5fa2ff;
  --cyan: #27a4c5;
  --danger: #d74b55;
  --shadow: 0 20px 70px rgba(50, 73, 104, 0.16);
  --radius: 8px;
  --soft-surface: rgba(244, 249, 255, 0.9);
  --soft-surface-strong: rgba(255, 255, 255, 0.96);
  --soft-border: rgba(255, 255, 255, 0.86);
  --soft-shadow: 12px 12px 28px rgba(151, 171, 194, 0.2), -12px -12px 28px rgba(255, 255, 255, 0.78);
  --soft-shadow-hover: 0 4px 4px rgba(255, 255, 255, 0.88), 0 8px 16px rgba(151, 171, 194, 0.26), inset 0 0 3px rgba(206, 207, 209, 0.75);
  --soft-shadow-pressed: inset 4px 4px 9px rgba(151, 171, 194, 0.26), inset -4px -4px 9px rgba(255, 255, 255, 0.84);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background:
    radial-gradient(circle at 18% 8%, rgba(82, 144, 255, 0.18), transparent 30%),
    radial-gradient(circle at 88% 20%, rgba(80, 197, 208, 0.16), transparent 28%),
    linear-gradient(135deg, #eef6ff, #f8fbff 48%, #eaf6f3);
  overflow: auto;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(115deg, transparent 0 45%, rgba(255, 255, 255, 0.55) 46% 50%, transparent 52%),
    radial-gradient(circle at 55% 92%, rgba(255, 255, 255, 0.64), transparent 34%);
  filter: blur(18px);
}

.app-shell {
  position: relative;
  display: grid;
  grid-template-columns: 360px minmax(820px, 1fr) 320px;
  grid-template-rows: minmax(928px, auto) 124px;
  gap: 14px;
  width: min(1980px, 100vw);
  min-width: 1540px;
  height: max(1094px, 100vh);
  min-height: 1094px;
  padding: 14px;
}

.glass {
  background:
    linear-gradient(145deg, var(--soft-surface-strong), var(--soft-surface)),
    var(--glass);
  border: 1px solid var(--soft-border);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--soft-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(18px) saturate(1.22);
}

.sidebar {
  grid-row: 1 / 3;
  display: flex;
  min-height: 0;
  flex-direction: column;
  padding: 18px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding-bottom: 16px;
}

.brand-mark {
  display: block;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 12px 24px rgba(34, 119, 230, 0.18);
  overflow: hidden;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand p,
.brand h1,
.eyebrow,
.section-label,
.panel-title h3,
.chord-title h2 {
  margin: 0;
}

.brand p,
.eyebrow,
.section-label {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand h1 {
  margin-top: 2px;
  font-size: 24px;
}

.app-tabs,
.library-tabs,
.rail-tabs,
.segmented {
  display: flex;
  gap: 8px;
}

.app-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.library-tabs,
.rail-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.app-tabs,
.library-tabs {
  margin: 2px 0 14px;
}

.app-tab,
.nav-tab,
.rail-tab,
.instrument-tab,
.fret-mode,
.piano-key-mode,
.guitar-string-mode,
.bass-string-mode,
.fret-count-mode,
.fret-memory-mode,
.fret-memory-instrument,
.fret-memory-string,
.fret-memory-range,
.fret-memory-display,
.scale-root-button,
.scale-type-button,
.scale-instrument,
.scale-label-mode,
.scale-fret-range,
.scale-chord-button,
.training-category,
.training-mode,
.training-note-option,
.training-choice,
.play-btn,
.custom-note,
.ghost-btn,
.secondary-btn,
.primary-btn,
.icon-btn,
.transport-btn,
.dashed-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid rgba(137, 156, 183, 0.4);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.68);
  background-image: linear-gradient(to top, rgba(218, 228, 240, 0.94) 0%, rgba(255, 255, 255, 0.98) 80%, #fff 100%);
  box-shadow: 0 4px 8px rgba(151, 171, 194, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  font-weight: 700;
  text-shadow: 0 1px rgba(255, 255, 255, 0.86);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    background 0.18s ease,
    box-shadow 0.18s ease,
    color 0.18s ease;
}

.app-tab,
.nav-tab,
.rail-tab {
  flex: 1;
  min-height: 50px;
  padding: 11px 12px;
  line-height: 1.24;
}

.instrument-tab,
.fret-mode,
.piano-key-mode,
.guitar-string-mode,
.bass-string-mode,
.fret-count-mode,
.fret-memory-mode,
.fret-memory-instrument,
.fret-memory-string,
.fret-memory-range,
.fret-memory-display,
.scale-root-button,
.scale-type-button,
.scale-instrument,
.scale-label-mode,
.scale-fret-range,
.scale-chord-button,
.training-category,
.training-mode,
.training-note-option,
.training-choice,
.play-btn,
.custom-note,
.ghost-btn,
.secondary-btn,
.icon-btn,
.transport-btn,
.dashed-btn {
  padding: 9px 14px;
}

.app-tab:hover,
.nav-tab:hover,
.rail-tab:hover,
.instrument-tab:hover,
.fret-mode:hover,
.piano-key-mode:hover,
.guitar-string-mode:hover,
.bass-string-mode:hover,
.fret-count-mode:hover,
.fret-memory-mode:hover,
.fret-memory-instrument:hover,
.fret-memory-string:hover,
.fret-memory-range:hover,
.fret-memory-display:hover,
.scale-root-button:hover,
.scale-type-button:hover,
.scale-instrument:hover,
.scale-label-mode:hover,
.scale-fret-range:hover,
.scale-chord-button:hover,
.training-category:hover,
.training-mode:hover,
.training-note-option:hover,
.training-choice:hover,
.play-btn:hover,
.custom-note:hover,
.ghost-btn:hover,
.secondary-btn:hover,
.icon-btn:hover,
.transport-btn:hover,
.dashed-btn:hover {
  box-shadow: var(--soft-shadow-hover);
  transform: translateY(-1px);
}

.app-tab:active,
.nav-tab:active,
.rail-tab:active,
.instrument-tab:active,
.fret-mode:active,
.piano-key-mode:active,
.guitar-string-mode:active,
.bass-string-mode:active,
.fret-count-mode:active,
.fret-memory-mode:active,
.fret-memory-instrument:active,
.fret-memory-string:active,
.fret-memory-range:active,
.fret-memory-display:active,
.scale-root-button:active,
.scale-type-button:active,
.scale-instrument:active,
.scale-label-mode:active,
.scale-fret-range:active,
.scale-chord-button:active,
.training-category:active,
.training-mode:active,
.training-note-option:active,
.training-choice:active,
.play-btn:active,
.custom-note:active,
.ghost-btn:active,
.secondary-btn:active,
.icon-btn:active,
.transport-btn:active,
.dashed-btn:active {
  box-shadow: var(--soft-shadow-pressed);
  transform: translateY(0);
}

.active,
.app-tab.active,
.nav-tab.active,
.rail-tab.active,
.instrument-tab.active,
.fret-mode.active,
.piano-key-mode.active,
.guitar-string-mode.active,
.bass-string-mode.active,
.fret-count-mode.active,
.fret-memory-mode.active,
.fret-memory-instrument.active,
.fret-memory-string.active,
.fret-memory-range.active,
.fret-memory-display.active,
.scale-root-button.active,
.scale-type-button.active,
.scale-instrument.active,
.scale-label-mode.active,
.scale-fret-range.active,
.scale-chord-button.active,
.training-category.active,
.training-mode.active,
.training-note-option.active,
.training-choice.active,
.play-btn.active,
.custom-note.active,
.chord-item.active {
  border-color: rgba(36, 120, 255, 0.5);
  color: #0b5de6;
  background: linear-gradient(to top, rgba(207, 226, 252, 0.94) 0%, rgba(255, 255, 255, 0.98) 84%, #fff 100%);
  box-shadow: var(--soft-shadow-pressed), 0 6px 12px rgba(36, 120, 255, 0.12);
}

.search {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.search-control {
  position: relative;
}

.search input,
.select-pill select,
.custom-actions input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 11px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  outline: none;
}

.search input {
  min-height: 48px;
  border-color: rgba(137, 156, 183, 0.34);
  border-radius: 14px;
  padding: 12px 44px 12px 16px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 10px 22px rgba(151, 171, 194, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  transition:
    width 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}

.search input:focus {
  border-color: rgba(36, 120, 255, 0.68);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 26px rgba(36, 120, 255, 0.13), inset 0 1px 0 rgba(255, 255, 255, 0.96);
}

.search-icon {
  position: absolute;
  top: 50%;
  right: 14px;
  width: 22px;
  height: 22px;
  color: #6d7f99;
  pointer-events: none;
  transform: translateY(-50%);
}

.select-pill {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}

.filter-board {
  display: grid;
  gap: 10px;
  max-height: 392px;
  margin: 16px 0 14px;
  overflow: auto;
  padding-right: 3px;
}

.filter-group {
  --filter-accent: #2478ff;
  --filter-tint: rgba(36, 120, 255, 0.1);
  border: 1px solid color-mix(in srgb, var(--filter-accent) 24%, var(--line));
  border-radius: var(--radius);
  padding: 9px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--filter-accent) 12%, transparent), transparent 70%),
    rgba(255, 255, 255, 0.42);
}

.root-group {
  --filter-accent: #139fe3;
}

.quality-group {
  --filter-accent: #f59e0b;
}

.extension-group {
  --filter-accent: #10b981;
}

.alteration-group {
  --filter-accent: #8b5cf6;
}

.mood-group {
  --filter-accent: #ec4899;
}

.filter-group-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 7px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.filter-group-title small {
  color: color-mix(in srgb, var(--filter-accent) 72%, var(--muted));
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.filter-chip-grid {
  display: grid;
  gap: 6px;
}

.root-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.quality-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compact-grid,
.mood-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.filter-chip {
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--filter-accent) 24%, var(--line));
  border-radius: 7px;
  padding: 7px 6px;
  color: color-mix(in srgb, var(--filter-accent) 34%, var(--ink));
  background: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.15;
  text-align: center;
}

.filter-chip.active {
  border-color: color-mix(in srgb, var(--filter-accent) 70%, #fff);
  color: #fff;
  background: linear-gradient(180deg, color-mix(in srgb, var(--filter-accent) 82%, #7dd3fc), var(--filter-accent));
  box-shadow: 0 8px 16px color-mix(in srgb, var(--filter-accent) 24%, transparent);
}

.library-header,
.panel-title,
.topbar,
.top-actions,
.library-header-actions,
.mini-actions,
.instrument-tools,
.transport,
.transport-body,
.number-stepper,
.toggle-line,
.volume-line {
  display: flex;
  align-items: center;
}

.library-header,
.panel-title,
.topbar,
.instrument-tools {
  justify-content: space-between;
}

.library-header {
  margin: 6px 0 10px;
}

.library-header-actions {
  gap: 8px;
}

.collapse-toggle {
  padding: 8px 11px;
  color: #32628f;
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.5);
}

.chord-library {
  display: grid;
  gap: 8px;
  min-height: 0;
  overflow: auto;
  padding-right: 3px;
}

.chord-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 11px;
  text-align: left;
  background: rgba(255, 255, 255, 0.56);
}

.chord-item strong {
  font-size: 16px;
}

.chord-item small {
  color: var(--muted);
}

.favorite-star {
  color: #7d91b2;
}

.favorite-star.is-on {
  color: #1768ee;
}

.workspace {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-rows: 76px 168px minmax(360px, auto) 228px;
  gap: 14px;
}

body.fret-memory-active .app-shell {
  grid-template-columns: 360px minmax(1120px, 1fr);
  grid-template-rows: minmax(928px, auto);
  min-width: 1480px;
  height: auto;
  min-height: 100vh;
}

body.fret-memory-active .workspace {
  grid-column: 2;
  grid-row: 1;
  grid-template-rows: minmax(0, auto);
}

body.fret-memory-active .topbar,
body.fret-memory-active .detail-strip,
body.fret-memory-active .instrument-panel,
body.fret-memory-active .progression,
body.fret-memory-active .right-rail,
body.fret-memory-active .transport {
  display: none;
}

body.fret-memory-active #chordSidebarContent {
  display: none;
}

body.fret-memory-active #fretMemorySidebar {
  display: grid;
}

body.fret-memory-active #fretMemoryPage {
  display: grid;
}

body.scale-active .app-shell {
  grid-template-columns: 360px minmax(1120px, 1fr);
  grid-template-rows: minmax(928px, auto);
  min-width: 1480px;
  height: auto;
  min-height: 100vh;
}

body.scale-active .workspace {
  grid-column: 2;
  grid-row: 1;
  grid-template-rows: minmax(0, auto);
}

body.scale-active .topbar,
body.scale-active .detail-strip,
body.scale-active .instrument-panel,
body.scale-active .progression,
body.scale-active .right-rail,
body.scale-active .transport {
  display: none;
}

body.scale-active #chordSidebarContent {
  display: none;
}

body.scale-active #scaleSidebar {
  display: grid;
}

body.scale-active #scalePage {
  display: grid;
}

body.training-active .app-shell {
  grid-template-columns: 360px minmax(1120px, 1fr);
  grid-template-rows: minmax(928px, auto);
  min-width: 1480px;
  height: auto;
  min-height: 100vh;
}

body.training-active .workspace {
  grid-column: 2;
  grid-row: 1;
  grid-template-rows: minmax(0, auto);
}

body.training-active .topbar,
body.training-active .detail-strip,
body.training-active .instrument-panel,
body.training-active .progression,
body.training-active .right-rail,
body.training-active .transport {
  display: none;
}

body.training-active #chordSidebarContent {
  display: none;
}

body.training-active #trainingSidebar {
  display: grid;
}

body.training-active #trainingPage {
  display: grid;
}

body.instrument-expanded .app-shell {
  grid-template-columns: 300px minmax(1180px, 1fr) 280px;
  grid-template-rows: 76px 150px 238px auto 124px;
  min-width: 1760px;
  height: auto;
  min-height: 100vh;
}

body.instrument-expanded .workspace {
  display: contents;
}

body.instrument-expanded .topbar {
  grid-column: 2;
  grid-row: 1;
}

body.instrument-expanded .detail-strip {
  grid-column: 2;
  grid-row: 2;
  padding-block: 14px;
}

body.instrument-expanded .progression {
  grid-column: 2;
  grid-row: 3;
}

body.instrument-expanded .instrument-panel {
  grid-column: 1 / 4;
  grid-row: 4;
  min-height: 420px;
  overflow: hidden;
}

body.instrument-expanded .transport {
  grid-column: 1 / 4;
  grid-row: 5;
}

body.instrument-expanded .sidebar,
body.instrument-expanded .right-rail {
  align-self: start;
  max-height: 470px;
  overflow: auto;
}

body.instrument-expanded .sidebar {
  grid-column: 1;
  grid-row: 1 / 4;
  overflow: hidden;
}

body.instrument-expanded .right-rail {
  grid-column: 3;
  grid-row: 1 / 4;
  overflow: auto;
  overscroll-behavior: contain;
  padding-right: 4px;
}

body.instrument-expanded .filter-board {
  flex: 0 0 188px;
  max-height: 188px;
  margin: 10px 0 10px;
  padding-right: 4px;
  overflow: auto;
  overscroll-behavior: contain;
}

body.instrument-expanded .chord-library {
  flex: 1 1 auto;
  max-height: none;
  min-height: 122px;
  overflow: auto;
  overscroll-behavior: contain;
}

body.instrument-expanded .library-header {
  flex: 0 0 auto;
  margin: 4px 0 8px;
}

body.instrument-expanded .rail-card {
  padding: 14px;
}

body.progression-collapsed:not(.fret-memory-active):not(.scale-active):not(.training-active) .workspace {
  grid-template-rows: 76px 168px minmax(360px, auto) 68px;
}

body.transport-collapsed:not(.fret-memory-active):not(.scale-active):not(.training-active) .app-shell {
  grid-template-rows: minmax(928px, auto) 58px;
}

body.instrument-expanded.progression-collapsed .app-shell {
  grid-template-rows: 76px 150px 70px auto 124px;
}

body.instrument-expanded.transport-collapsed .app-shell {
  grid-template-rows: 76px 150px 238px auto 58px;
}

body.instrument-expanded.progression-collapsed.transport-collapsed .app-shell {
  grid-template-rows: 76px 150px 70px auto 58px;
}

.fret-memory-sidebar {
  gap: 14px;
  color: var(--muted);
  line-height: 1.55;
}

.fret-memory-sidebar h3 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
}

.fret-memory-sidebar p {
  margin: 0;
}

.fret-side-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.fret-side-stats span,
.fret-memory-stats span {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.54);
  font-size: 12px;
}

.fret-side-stats strong,
.fret-memory-stats strong {
  color: var(--ink);
  font-size: 18px;
}

.fret-memory-page {
  display: grid;
  gap: 14px;
  min-width: 0;
  padding: 18px;
}

.fret-memory-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
}

.fret-memory-header h2 {
  margin: 2px 0 8px;
  font-size: 38px;
}

.fret-memory-header p {
  margin: 0;
  color: var(--muted);
}

.fret-memory-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 10px;
  min-width: 390px;
}

.fret-memory-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.34);
}

.control-block {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.control-block.wide {
  grid-column: span 2;
}

.control-block .segmented {
  flex-wrap: wrap;
}

.fret-memory-instrument.is-disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.fret-note-picker {
  display: grid;
  grid-template-columns: repeat(12, minmax(38px, 1fr));
  gap: 6px;
}

.fret-note-button {
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 5px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.62);
  font-weight: 800;
}

.fret-note-button.active {
  border-color: rgba(36, 120, 255, 0.5);
  color: #fff;
  background: linear-gradient(180deg, #5fa2ff, #1768ee);
}

.fret-practice-panel {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  border: 1px solid rgba(36, 120, 255, 0.22);
  border-radius: var(--radius);
  padding: 14px;
  background: linear-gradient(180deg, rgba(238, 247, 255, 0.78), rgba(255, 255, 255, 0.5));
}

.fret-practice-panel strong {
  display: block;
  margin: 4px 0;
  font-size: 24px;
}

.fret-practice-panel span {
  color: var(--muted);
}

.fret-memory-board {
  min-width: 0;
  overflow: auto;
  padding-bottom: 4px;
}

.memory-fretboard {
  height: auto;
  min-height: 270px;
  padding-left: 64px;
  overflow: visible;
}

.memory-fretboard .string-row {
  min-height: 42px;
}

.memory-fretboard.is-bass .string-row {
  min-height: 46px;
}

.memory-fretboard .string-name {
  left: -56px;
}

.memory-fret {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  border-left: 2px solid rgba(189, 198, 206, 0.6);
  border-image: linear-gradient(90deg, var(--fret-metal-dark), var(--fret-metal-light) 48%, rgba(111, 121, 133, 0.56) 76%, rgba(39, 45, 55, 0.72)) 1;
  background: transparent;
  color: rgba(255, 255, 255, 0.4);
  font-size: 11px;
  box-shadow:
    inset 1px 0 0 rgba(255, 255, 255, 0.22),
    inset -1px 0 0 rgba(0, 0, 0, 0.2);
}

.memory-fret.is-clickable {
  cursor: pointer;
}

.memory-fret.marker::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 5;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(226, 235, 245, 0.26);
  transform: translate(-50%, -50%);
}

.memory-fret-label {
  position: relative;
  z-index: 13;
  display: grid;
  min-width: 34px;
  height: 30px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  color: #eef6ff;
  background: rgba(7, 20, 35, 0.46);
  font-size: 12px;
  font-weight: 900;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.memory-fret.memory-hit .memory-fret-label,
.memory-open-hit {
  border-color: rgba(255, 255, 255, 0.74);
  color: #fff;
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.2),
    0 10px 20px rgba(0, 0, 0, 0.22),
    0 10px 22px color-mix(in srgb, var(--note-color, #1768ee) 42%, transparent);
}

.memory-fret:hover .memory-fret-label {
  transform: scale(1.06);
}

.memory-fret.memory-wrong .memory-fret-label {
  border-color: rgba(255, 255, 255, 0.78);
  color: #fff;
  background: radial-gradient(circle at 32% 22%, #ffb0b0, #dc2626 72%);
  box-shadow: 0 8px 18px rgba(220, 38, 38, 0.28);
}

.memory-open-wrong {
  border-color: rgba(255, 255, 255, 0.78);
  color: #fff;
  background: radial-gradient(circle at 32% 22%, #ffb0b0, #dc2626 72%);
  box-shadow: 0 8px 18px rgba(220, 38, 38, 0.28);
}

.memory-fret-number-row {
  position: absolute;
  left: 24px;
  right: 20px;
  bottom: 8px;
  display: grid;
  grid-template-columns: 40px repeat(var(--frets, 12), 1fr);
  color: #687d98;
  font-size: 12px;
  text-align: center;
}

.fret-memory-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 13px;
}

.scale-sidebar {
  gap: 14px;
  color: var(--muted);
  line-height: 1.55;
}

.scale-sidebar h3 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
}

.scale-sidebar p {
  margin: 0;
}

.scale-side-card {
  display: grid;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: rgba(255, 255, 255, 0.54);
}

.scale-side-card span,
.scale-side-card small {
  color: var(--muted);
  font-size: 12px;
}

.scale-side-card strong {
  color: var(--ink);
  font-size: 18px;
}

.scale-page {
  display: grid;
  gap: 14px;
  min-width: 0;
  padding: 18px;
}

.scale-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
}

.scale-header h2 {
  margin: 2px 0 8px;
  font-size: 38px;
}

.scale-header p {
  margin: 0;
  color: var(--muted);
}

.scale-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 10px;
  min-width: 430px;
}

.scale-summary span {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.54);
  font-size: 12px;
}

.scale-summary strong {
  color: var(--ink);
  font-size: 17px;
}

.scale-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.34);
}

.scale-root-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(42px, 1fr));
  gap: 6px;
}

.scale-type-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(150px, 1fr));
  gap: 6px;
  max-height: 154px;
  overflow: auto;
  padding-right: 4px;
}

.scale-root-button,
.scale-type-button,
.scale-chord-button {
  padding: 8px 9px;
  font-weight: 800;
}

.scale-type-button {
  display: grid;
  gap: 2px;
  text-align: left;
}

.scale-type-button small {
  color: var(--muted);
  font-weight: 600;
}

.scale-detail-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.15fr 0.9fr;
  gap: 12px;
}

.scale-info-card,
.scale-related-card,
.scale-instrument-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: rgba(255, 255, 255, 0.46);
}

.scale-info-card h3 {
  margin: 6px 0 12px;
  font-size: 22px;
}

.scale-info-card p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.scale-note-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scale-note-pill {
  display: grid;
  min-width: 50px;
  gap: 2px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 10px;
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(235, 242, 252, 0.86));
}

.scale-note-pill strong {
  color: var(--ink);
}

.scale-note-pill small {
  color: var(--muted);
}

.scale-meta-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.scale-meta-list p {
  display: grid;
  gap: 4px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: rgba(255, 255, 255, 0.5);
}

.scale-meta-list span {
  color: var(--muted);
  font-size: 12px;
}

.scale-related-card .panel-title,
.scale-instrument-card .panel-title {
  align-items: center;
}

.scale-related-chords {
  display: grid;
  grid-template-columns: repeat(7, minmax(118px, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.scale-chord-button {
  display: grid;
  gap: 4px;
  min-height: 64px;
  text-align: left;
}

.scale-chord-button small {
  color: var(--muted);
}

.scale-instrument-card {
  display: grid;
  gap: 14px;
  min-height: 360px;
}

.scale-instrument-view {
  min-width: 0;
  overflow: auto;
}

.scale-instrument-view .piano {
  min-height: 254px;
}

.scale-instrument-view .fretboard {
  min-width: 1120px;
}

.scale-chord-tone.white-key,
.scale-chord-tone.black-key,
.scale-chord-tone.open-hit,
.scale-instrument-view .fret.scale-chord-tone::after {
  outline: 3px solid rgba(245, 158, 11, 0.72);
  outline-offset: -3px;
}

.scale-muted-tone {
  opacity: 0.7;
}

.training-sidebar {
  gap: 14px;
  color: var(--muted);
  line-height: 1.55;
}

.training-sidebar h3,
.training-sidebar p {
  margin: 0;
}

.training-sidebar h3 {
  color: var(--ink);
  font-size: 20px;
}

.training-side-stats,
.training-summary {
  display: grid;
  gap: 10px;
}

.training-side-stats {
  grid-template-columns: repeat(3, 1fr);
}

.training-side-stats span,
.training-summary span,
.training-side-card {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.54);
  font-size: 12px;
}

.training-side-stats strong,
.training-summary strong,
.training-side-card strong {
  color: var(--ink);
  font-size: 18px;
}

.training-side-card small {
  color: var(--muted);
}

.training-page {
  display: grid;
  gap: 14px;
  min-width: 0;
  padding: 18px;
}

.training-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
}

.training-header h2 {
  margin: 2px 0 8px;
  font-size: 38px;
}

.training-header p {
  margin: 0;
  color: var(--muted);
}

.training-summary {
  grid-template-columns: repeat(4, minmax(100px, 1fr));
  min-width: 520px;
}

.training-plan,
.training-controls,
.training-question-card,
.training-record-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: rgba(255, 255, 255, 0.46);
}

.training-plan .panel-title,
.training-question-card .panel-title {
  align-items: center;
}

.training-plan-list {
  display: grid;
  grid-template-columns: repeat(7, minmax(118px, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.training-day-card {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: rgba(255, 255, 255, 0.58);
  text-align: left;
  cursor: pointer;
}

.training-day-card.active {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(36, 120, 255, 0.12);
}

.training-day-card strong {
  color: var(--ink);
}

.training-day-card small {
  color: var(--muted);
}

.course-lesson-card.locked {
  cursor: not-allowed;
  opacity: 0.5;
}

.course-lesson-card.completed,
.course-lesson-card.mastered {
  border-color: rgba(34, 197, 94, 0.35);
  background: rgba(34, 197, 94, 0.09);
}

.course-lesson-card.inProgress {
  border-color: rgba(245, 158, 11, 0.42);
  background: rgba(245, 158, 11, 0.1);
}

.training-controls {
  display: grid;
  grid-template-columns: 0.8fr 2.2fr;
  gap: 12px;
}

.training-category-tabs {
  display: grid;
  gap: 8px;
}

.training-category,
.training-mode,
.training-note-option,
.training-choice {
  padding: 9px 10px;
  font-weight: 800;
}

.training-mode-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(160px, 1fr));
  gap: 8px;
}

.training-mode {
  display: grid;
  gap: 3px;
  text-align: left;
}

.training-mode small,
.training-record-card p,
.training-prompt,
.training-feedback-muted {
  color: var(--muted);
}

.training-question-card {
  display: grid;
  gap: 12px;
}

.training-prompt {
  margin: 0;
  line-height: 1.6;
}

.training-answer-area {
  display: grid;
  gap: 12px;
}

.progression-training-settings,
.progression-analysis {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(156, 145, 255, 0.055);
}

.progression-training-settings {
  display: grid;
  gap: 10px;
  padding: 12px;
}

.progression-training-current,
.progression-analysis-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.progression-training-current span,
.progression-setting-field span {
  color: var(--muted);
  font-size: 12px;
}

.progression-setting-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(110px, 1fr));
  gap: 8px;
}

.progression-setting-field {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.progression-setting-field select {
  width: 100%;
  min-width: 0;
  padding: 8px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--soft-surface-strong, #19191c);
}

.progression-setting-field select:disabled {
  opacity: 0.5;
}

.progression-analysis {
  display: grid;
  gap: 0;
  margin-top: 14px;
  overflow: clip;
}

.progression-analysis-heading {
  padding: 14px 16px;
}

.progression-analysis-heading p,
.progression-analysis-heading h4,
.progression-analysis-body p,
.progression-analysis-body h5 {
  margin: 0;
}

.progression-analysis-heading h4 {
  margin-top: 3px;
}

.progression-reviewed-badge {
  flex: 0 0 auto;
  padding: 5px 8px;
  border-radius: 999px;
  color: #aeead7;
  background: rgba(20, 184, 166, 0.13);
  font-size: 11px;
  font-weight: 800;
}

.progression-analysis details {
  border-top: 1px solid var(--line);
}

.progression-analysis summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 800;
}

.progression-analysis-body {
  display: grid;
  gap: 9px;
  padding: 0 16px 15px;
  color: var(--muted);
  line-height: 1.65;
}

.progression-analysis-body strong,
.progression-analysis-body h5 {
  color: var(--ink);
}

.progression-analysis-body ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 20px;
}

.progression-analysis-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.progression-tension-curve {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(78px, 1fr));
  gap: 6px;
}

.progression-tension-curve span {
  display: grid;
  gap: 2px;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
  font-size: 11px;
}

.training-instrument-options {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.training-note-grid,
.training-choice-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(44px, 1fr));
  gap: 7px;
}

.training-choice-grid {
  grid-template-columns: repeat(4, minmax(130px, 1fr));
}

.training-choice {
  display: grid;
  gap: 4px;
  min-height: 58px;
  text-align: left;
}

.training-choice small {
  color: var(--muted);
  font-weight: 600;
}

.training-selected-sequence {
  border: 1px dashed rgba(36, 120, 255, 0.35);
  border-radius: var(--radius);
  padding: 10px;
  color: var(--muted);
  background: rgba(236, 246, 255, 0.58);
}

.training-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
}

.training-actions span.is-correct {
  color: #0b8f5f;
  font-weight: 800;
}

.training-actions span.is-wrong {
  color: var(--danger);
  font-weight: 800;
}

@media (max-width: 1080px) {
  .progression-setting-grid {
    grid-template-columns: repeat(3, minmax(120px, 1fr));
  }

  .training-plan-list {
    grid-template-columns: repeat(3, minmax(118px, 1fr));
  }
}

@media (max-width: 760px) {
  .training-page,
  .training-question-card,
  .training-plan,
  .training-controls,
  .training-record-card,
  .training-answer-area {
    min-width: 0;
    max-width: 100%;
  }

  .training-summary,
  .training-controls,
  .training-mode-list,
  .training-plan-list,
  .training-records-grid {
    min-width: 0;
    grid-template-columns: 1fr;
  }

  .training-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .progression-setting-grid,
  .progression-analysis-columns,
  .training-choice-grid {
    grid-template-columns: 1fr;
  }

  .progression-training-current,
  .progression-analysis-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .training-actions {
    align-items: flex-start;
    flex-wrap: wrap;
  }
}

.training-fretboard-wrap {
  display: grid;
  gap: 8px;
  overflow: auto;
}

.training-fretboard {
  height: auto;
  min-height: 250px;
  padding-left: 64px;
}

.training-fretboard .string-row {
  min-height: 42px;
}

.training-fretboard .string-name {
  left: -56px;
}

.training-fretboard button.string-name,
.training-fret {
  cursor: pointer;
}

.training-fret {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  border-left: 2px solid rgba(189, 198, 206, 0.6);
  border-image: linear-gradient(90deg, var(--fret-metal-dark), var(--fret-metal-light) 48%, rgba(111, 121, 133, 0.56) 76%, rgba(39, 45, 55, 0.72)) 1;
  background: transparent;
  color: rgba(255, 255, 255, 0.42);
  box-shadow:
    inset 1px 0 0 rgba(255, 255, 255, 0.22),
    inset -1px 0 0 rgba(0, 0, 0, 0.2);
}

.training-fret.marker::before {
  content: "";
  position: relative;
  z-index: 5;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.26);
}

.training-fret.selected::after,
.training-fret.target::after,
.training-fret.correct::after,
.training-fret.wrong::after,
.training-open.selected,
.training-open.target,
.training-open.correct,
.training-open.wrong {
  border-color: rgba(255, 255, 255, 0.74);
  color: #fff;
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow: 0 8px 18px color-mix(in srgb, var(--note-color, #1768ee) 38%, transparent);
}

.training-fret.selected::after,
.training-fret.target::after,
.training-fret.correct::after,
.training-fret.wrong::after {
  content: attr(data-label);
  position: relative;
  z-index: 13;
  display: grid;
  min-width: 34px;
  height: 30px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  font-weight: 900;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.training-fret:hover::after {
  transform: scale(1.06);
}

.training-fret.wrong::after,
.training-open.wrong {
  background: radial-gradient(circle at 32% 22%, #ffb0b0, #dc2626 72%);
}

.training-piano .white-key,
.training-piano .black-key {
  cursor: pointer;
  font: inherit;
}

.training-piano .white-key.selected,
.training-piano .black-key.selected,
.training-piano .white-key.target,
.training-piano .black-key.target {
  color: #fff;
}

.training-piano .white-key.wrong,
.training-piano .black-key.wrong {
  outline: 2px solid rgba(220, 38, 38, 0.75);
}

.training-records-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 0.8fr;
  gap: 12px;
}

.training-mini-list {
  display: grid;
  gap: 7px;
  margin-top: 10px;
}

.training-mini-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.56);
}

.training-mini-item strong {
  color: var(--ink);
}

.topbar {
  min-width: 0;
  padding: 14px 18px;
}

.chord-title > div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chord-title h2 {
  font-size: 42px;
  letter-spacing: -0.02em;
}

.star-btn {
  border: 0;
  color: #60799e;
  background: transparent;
  font-size: 30px;
  line-height: 1;
}

.star-btn.is-on {
  color: #1768ee;
}

.quality-badge {
  padding: 8px 12px;
  border: 1px solid rgba(36, 120, 255, 0.24);
  border-radius: 999px;
  color: #115fce;
  background: rgba(220, 236, 255, 0.82);
  font-size: 14px;
}

.top-actions {
  gap: 10px;
}

.icon-btn,
.ghost-btn,
.secondary-btn,
.primary-btn,
.transport-btn {
  padding: 10px 14px;
}

.primary-btn,
.big-play {
  border: 1px solid rgba(16, 99, 235, 0.44);
  color: #fff;
  background: linear-gradient(180deg, #3b8cff, #1767ee);
  box-shadow: 0 10px 24px rgba(36, 120, 255, 0.25);
}

.big-play {
  min-width: 104px;
  min-height: 62px;
  border-radius: 999px;
  font-weight: 800;
}

.detail-strip {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(188px, 1fr) minmax(150px, 0.86fr) minmax(112px, 0.66fr) minmax(230px, 1.3fr);
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
}

.detail-strip > div {
  min-width: 0;
}

.detail-strip > div:not(:last-child) {
  border-right: 1px solid var(--line);
}

.note-row,
.degree-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.note-pill,
.degree-pill {
  min-width: 52px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: var(--ink);
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(235, 242, 252, 0.86));
  box-shadow: 0 8px 16px rgba(38, 75, 120, 0.08);
}

.note-pill.active-note {
  border-color: rgba(36, 120, 255, 0.48);
  color: #fff;
  background: linear-gradient(180deg, #5fa2ff, #1768ee);
}

.note-pill.is-dimmed {
  color: #7890ad;
  opacity: 0.72;
}

.note-pill small {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  opacity: 0.85;
}

.formula-text {
  display: block;
  margin-top: 12px;
  font-size: 24px;
  letter-spacing: 0.16em;
}

.color-copy p:last-child {
  margin: 10px 0 0;
  line-height: 1.6;
}

.instrument-panel {
  display: grid;
  min-width: 0;
  grid-template-rows: auto auto auto;
  align-content: start;
  min-height: 0;
  padding: 16px;
  overflow: visible;
}

.instrument-tools {
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
}

.instrument-tools p {
  margin: 0;
  flex: 1;
  min-width: 260px;
  text-align: right;
}

.instrument-tools .segmented {
  flex: 0 0 auto;
}

.fret-advanced-options,
.overlay-options {
  display: flex;
  flex: 0 1 auto;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.compact-select,
.compact-input {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.68);
  font: inherit;
}

.compact-input {
  width: 168px;
}

.arpeggio-panel {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  margin-top: 10px;
  border: 1px solid rgba(36, 120, 255, 0.16);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.42);
}

.arpeggio-panel strong {
  display: block;
  color: var(--ink);
}

.arpeggio-sequence {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.arpeggio-note {
  display: grid;
  min-width: 54px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  padding: 7px 10px;
  color: #fff;
  font-weight: 900;
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow: 0 8px 16px color-mix(in srgb, var(--note-color, #1768ee) 26%, transparent);
}

.arpeggio-note small {
  font-size: 10px;
  opacity: 0.92;
}

.arpeggio-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.segmented.small button,
.instrument-tab {
  padding: 8px 12px;
}

.instrument-view {
  min-height: 0;
  min-width: 0;
  max-width: 100%;
  margin-top: 8px;
  overflow: visible;
}

body.instrument-expanded .instrument-view {
  margin-top: 14px;
  overflow: visible;
}

.piano {
  position: relative;
  display: block;
  width: 100%;
  min-width: 0;
  height: 260px;
  min-height: 0;
  padding: 22px 18px 18px;
  border: 1px solid rgba(54, 69, 91, 0.32);
  border-radius: 8px;
  background:
    linear-gradient(180deg, #17202c 0, #0e151f 22px, transparent 22px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(221, 231, 243, 0.56));
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.92),
    inset 0 -20px 34px rgba(48, 72, 102, 0.16),
    0 20px 34px rgba(47, 72, 99, 0.2);
  overflow: hidden;
}

.piano.is-scrollable {
  height: 300px;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.piano.is-scrollable .piano-keybed {
  width: max(100%, var(--piano-min-width, 100%));
  min-width: max(100%, var(--piano-min-width, 100%));
  flex: 0 0 max(100%, var(--piano-min-width, 100%));
}

.piano-keybed {
  position: relative;
  display: flex;
  height: 100%;
  min-width: var(--piano-min-width, 0);
}

.white-key {
  position: relative;
  flex: 1;
  min-width: 0;
  border: 1px solid rgba(78, 94, 112, 0.34);
  border-top: 0;
  border-radius: 0 0 8px 8px;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.1), transparent 12%, transparent 84%, rgba(0, 0, 0, 0.12)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(217, 230, 245, 0.5)),
    url("assets/piano-ivory-key.png");
  background-size: auto, auto, 100% 100%;
  box-shadow:
    inset 0 -14px 22px rgba(75, 101, 132, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.94),
    0 2px 3px rgba(24, 36, 52, 0.12);
}

.white-key.hit {
  background:
    linear-gradient(180deg, var(--note-glow, #8cc6ff), var(--note-color, #2478ff)),
    url("assets/piano-ivory-key.png");
  background-size: auto, 100% 100%;
  box-shadow:
    inset 0 -16px 22px rgba(16, 82, 184, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 0 0 1px var(--note-color, #2478ff),
    0 10px 22px color-mix(in srgb, var(--note-color, #2478ff) 28%, transparent);
}

.playable-note {
  cursor: pointer;
}

.playable-note:hover {
  filter: brightness(1.04) saturate(1.08);
}

.black-key {
  position: absolute;
  top: 0;
  z-index: 3;
  width: calc(56% / var(--white-keys, 14));
  height: 57%;
  transform: translateX(-50%);
  border: 1px solid rgba(0, 0, 0, 0.82);
  border-radius: 0 0 7px 7px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.18), transparent 30%, rgba(0, 0, 0, 0.52)),
    url("assets/piano-ebony-key.png");
  background-size: auto, 100% 100%;
  box-shadow:
    0 9px 11px rgba(0, 0, 0, 0.38),
    inset 0 -12px 18px rgba(255, 255, 255, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.black-key.hit {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.24), transparent 24%, rgba(0, 0, 0, 0.36)),
    linear-gradient(180deg, var(--note-glow, #8cc6ff), var(--note-color, #2478ff)),
    url("assets/piano-ebony-key.png");
  background-size: auto, auto, 100% 100%;
}

.key-label {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  color: #71849c;
  font-size: 12px;
}

.degree-dot {
  position: absolute;
  left: 50%;
  top: 58%;
  z-index: 5;
  transform: translate(-50%, -50%);
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--note-color, #1768ee) 38%, transparent);
}

.fretboard {
  --board-base: #17101a;
  --board-mid: #2b1725;
  --board-warm: rgba(128, 72, 45, 0.42);
  --fret-metal-dark: rgba(62, 68, 75, 0.72);
  --fret-metal-light: rgba(218, 226, 232, 0.78);
  --string-top: rgba(255, 255, 255, 0.96);
  --string-core: rgba(183, 194, 205, 0.94);
  --string-shadow: rgba(17, 24, 39, 0.7);
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-rows: repeat(var(--strings, 6), minmax(0, 1fr));
  height: 286px;
  min-height: 0;
  gap: 0;
  padding: 22px 20px 32px 58px;
  border: 1px solid rgba(13, 27, 52, 0.24);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 23% 50%, rgba(255, 255, 255, 0.18), transparent 1.45%),
    radial-gradient(circle at 43% 50%, rgba(255, 255, 255, 0.16), transparent 1.45%),
    radial-gradient(circle at 63% 50%, rgba(255, 255, 255, 0.16), transparent 1.45%),
    radial-gradient(circle at 83% 50%, rgba(255, 255, 255, 0.16), transparent 1.45%),
    repeating-linear-gradient(
      12deg,
      rgba(255, 255, 255, 0.025) 0 2px,
      transparent 2px 14px,
      rgba(0, 0, 0, 0.08) 14px 18px,
      transparent 18px 34px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05), transparent 16%, transparent 82%, rgba(0, 0, 0, 0.18)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 18%, rgba(0, 0, 0, 0.18) 100%),
    linear-gradient(115deg, var(--board-base), var(--board-mid) 48%, #100b13);
  background-size: auto, auto, auto, auto, 180px 180px, 100% 100%, 100% 100%, 100% 100%;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    inset 0 18px 26px rgba(255, 255, 255, 0.07),
    inset 0 -24px 28px rgba(0, 0, 0, 0.34),
    inset 14px 0 22px rgba(0, 0, 0, 0.24),
    inset -14px 0 22px rgba(255, 255, 255, 0.04),
    0 20px 34px rgba(45, 61, 82, 0.22);
  overflow: hidden;
}

.fretboard.is-bass {
  --board-base: #3a1f10;
  --board-mid: #67381b;
  --board-warm: rgba(232, 170, 95, 0.16);
  --fret-metal-dark: rgba(84, 69, 55, 0.72);
  --fret-metal-light: rgba(232, 215, 189, 0.72);
  height: 250px;
  min-height: 0;
  background:
    radial-gradient(circle at 26% 50%, rgba(255, 246, 225, 0.16), transparent 1.8%),
    radial-gradient(circle at 50% 50%, rgba(255, 246, 225, 0.14), transparent 1.8%),
    radial-gradient(circle at 74% 50%, rgba(255, 246, 225, 0.14), transparent 1.8%),
    repeating-linear-gradient(
      10deg,
      rgba(255, 236, 202, 0.035) 0 2px,
      transparent 2px 15px,
      rgba(43, 20, 7, 0.18) 15px 20px,
      transparent 20px 36px
    ),
    linear-gradient(90deg, rgba(255, 244, 218, 0.06), transparent 18%, transparent 84%, rgba(0, 0, 0, 0.22)),
    linear-gradient(180deg, rgba(255, 244, 218, 0.07), transparent 18%, rgba(0, 0, 0, 0.22) 100%),
    linear-gradient(115deg, var(--board-base), var(--board-mid) 52%, #261208);
  background-size: auto, auto, auto, 220px 180px, 100% 100%, 100% 100%, 100% 100%;
}

.fretboard.is-bass.bass-5 {
  height: 270px;
}

.fretboard::before {
  content: "";
  position: absolute;
  left: 57px;
  top: 22px;
  bottom: 32px;
  z-index: 8;
  width: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, #d8a64b, #f4d07b 44%, #805521);
  box-shadow: 2px 0 6px rgba(0, 0, 0, 0.38);
  pointer-events: none;
}

.fretboard::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent 12%, transparent 88%, rgba(0, 0, 0, 0.24)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08), transparent 8%, transparent 92%, rgba(0, 0, 0, 0.24));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 0 28px rgba(0, 0, 0, 0.34);
  pointer-events: none;
}

.fretboard.is-lefty {
  padding-right: 58px;
  padding-left: 20px;
  direction: rtl;
}

.fretboard.is-lefty::before {
  right: 57px;
  left: auto;
  box-shadow: -2px 0 6px rgba(0, 0, 0, 0.38);
}

.fretboard.is-lefty .string-name {
  right: -50px;
  left: auto;
}

.fretboard.is-lefty .fret-number-row {
  right: 58px;
  left: 20px;
}

.fretboard.is-lefty .fret,
.fretboard.is-lefty .string-name,
.fretboard.is-lefty .fret-number-row {
  direction: ltr;
}

.string-row {
  position: relative;
  z-index: 4;
  display: grid;
  grid-template-columns: repeat(var(--frets, 12), 1fr);
  align-items: stretch;
  min-height: 0;
}

.string-row::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  z-index: 9;
  height: calc(var(--string-size, 2px) * 1.12);
  transform: translateY(-50%);
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.18) 0 1px, transparent 1px 8px),
    linear-gradient(180deg, var(--string-top), var(--string-core) 42%, #7f8a96 48%, var(--string-top) 58%, #5d6874);
  border-radius: 999px;
  box-shadow:
    0 1px 2px var(--string-shadow),
    0 -1px 1px rgba(255, 255, 255, 0.3),
    0 0 calc(var(--string-size, 2px) * 1.1) rgba(255, 255, 255, 0.18);
  pointer-events: none;
}

.string-name {
  position: absolute;
  left: -50px;
  top: 50%;
  z-index: 12;
  display: grid;
  min-width: 34px;
  min-height: 24px;
  place-items: center;
  transform: translateY(-50%);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: #eef6ff;
  background: rgba(7, 20, 35, 0.46);
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.72);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.22);
}

button.string-name {
  font: inherit;
  cursor: pointer;
}

.fretboard.is-bass .string-name {
  min-width: 38px;
  color: #f8fbff;
  background: rgba(2, 10, 22, 0.62);
  font-size: 14px;
}

.string-name.open-hit {
  border-color: rgba(255, 255, 255, 0.72);
  color: #fff;
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow: 0 8px 18px color-mix(in srgb, var(--note-color, #1768ee) 40%, transparent);
}

.fret {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  border-left: 2px solid rgba(189, 198, 206, 0.6);
  border-image: linear-gradient(90deg, var(--fret-metal-dark), var(--fret-metal-light) 48%, rgba(111, 121, 133, 0.56) 76%, rgba(39, 45, 55, 0.72)) 1;
  background: transparent;
  color: rgba(255, 255, 255, 0.24);
  font-size: 11px;
  box-shadow:
    inset 1px 0 0 rgba(255, 255, 255, 0.22),
    inset -1px 0 0 rgba(0, 0, 0, 0.2);
}

button.fret {
  margin: 0;
  padding: 0;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.fret:hover,
.string-name:hover {
  filter: brightness(1.05) saturate(1.08);
}

.fret:first-of-type {
  border-left-width: 3px;
}

.fret[data-fret-fret="12"],
.fret[data-fret-fret="24"],
.memory-fret[data-memory-fret="12"],
.memory-fret[data-memory-fret="24"],
.training-fret[data-training-fret="12"],
.training-fret[data-training-fret="24"] {
  border-left-width: 3px;
  border-image: linear-gradient(90deg, rgba(86, 66, 32, 0.88), rgba(255, 224, 150, 0.82) 46%, rgba(137, 105, 49, 0.7)) 1;
}

.fret.marker::before {
  content: "";
  position: relative;
  z-index: 5;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.26);
  box-shadow:
    0 0 0 1px rgba(15, 25, 42, 0.22),
    inset 0 1px 1px rgba(255, 255, 255, 0.24);
}

.fret.hit::after {
  content: attr(data-label);
  position: relative;
  z-index: 13;
  display: grid;
  min-width: 36px;
  height: 36px;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.2),
    0 10px 20px rgba(0, 0, 0, 0.24),
    0 10px 22px color-mix(in srgb, var(--note-color, #1768ee) 44%, transparent);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.fret.scale-overlay-tone::after,
.fret.reverse-selected::after {
  content: attr(data-label);
  position: relative;
  z-index: 13;
  display: grid;
  min-width: 36px;
  height: 36px;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 999px;
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.45);
  background: radial-gradient(circle at 32% 22%, var(--note-glow, #a9d0ff), var(--note-color, #1768ee) 72%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.2),
    0 10px 20px rgba(0, 0, 0, 0.24),
    0 10px 22px color-mix(in srgb, var(--note-color, #1768ee) 44%, transparent);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.fret:hover::after {
  transform: scale(1.06);
}

.fret.root-tone::after,
.string-name.root-tone {
  outline: 3px solid rgba(255, 255, 255, 0.58);
  outline-offset: 2px;
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--note-color, #1768ee) 26%, transparent),
    0 12px 24px color-mix(in srgb, var(--note-color, #1768ee) 48%, transparent);
}

.fret.reverse-selected::after,
.string-name.reverse-selected {
  outline: 3px solid rgba(15, 23, 42, 0.55);
  outline-offset: 2px;
}

.fret.common-tone::after,
.string-name.common-tone {
  box-shadow:
    0 0 0 3px rgba(245, 158, 11, 0.45),
    0 8px 18px color-mix(in srgb, var(--note-color, #1768ee) 42%, transparent);
}

.fret.arpeggio-path::before {
  content: "";
  position: absolute;
  inset: 6px;
  z-index: 11;
  border: 2px dashed rgba(255, 255, 255, 0.76);
  border-radius: 999px;
  pointer-events: none;
}

.fret-number-row {
  position: absolute;
  left: 58px;
  right: 20px;
  bottom: 8px;
  display: grid;
  grid-template-columns: repeat(var(--frets, 12), 1fr);
  color: #687d98;
  font-size: 12px;
  text-align: center;
}

.progression {
  min-width: 0;
  min-height: 0;
  padding: 16px 18px;
}

.progression.is-collapsed {
  display: flex;
  align-items: center;
  min-height: 0;
  padding-block: 13px;
}

.progression.is-collapsed .panel-title {
  width: 100%;
}

.progression-body {
  min-width: 0;
}

.timeline {
  margin-top: 12px;
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(36, 120, 255, 0.08) 1px, transparent 1px) 0 0 / 12.5% 100%,
    rgba(255, 255, 255, 0.38);
}

.bar-ruler {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  padding: 8px 14px 4px;
  color: #30506f;
  font-weight: 700;
  text-align: center;
}

.progression-chips {
  display: grid;
  grid-template-columns: repeat(8, minmax(110px, 1fr));
  gap: 12px;
  min-height: 94px;
  padding: 10px 14px 14px;
  overflow: auto;
}

.progression-chip {
  position: relative;
  display: grid;
  gap: 5px;
  min-height: 78px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: rgba(255, 255, 255, 0.7);
  cursor: grab;
  user-select: none;
  transition: transform 0.16s ease, opacity 0.16s ease, box-shadow 0.16s ease;
}

.progression-chip:active {
  cursor: grabbing;
}

.progression-chip.dragging {
  opacity: 0.58;
  transform: scale(0.98);
}

.progression-chip.playing,
.progression-chip.selected {
  border-color: rgba(36, 120, 255, 0.72);
  box-shadow: 0 0 0 2px rgba(36, 120, 255, 0.14);
}

.progression-chip strong {
  font-size: 18px;
}

.progression-chip small {
  color: var(--muted);
}

.progression-chip .chip-actions {
  display: flex;
  gap: 6px;
}

.progression-chip button {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 3px 7px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.52);
  font-size: 12px;
}

.export-status,
.midi-status {
  min-height: 20px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.export-status a {
  color: #0d63c4;
  font-weight: 800;
  text-decoration: none;
}

.right-rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
}

.rail-card {
  flex: 0 0 auto;
  min-height: 0;
  padding: 18px;
  overflow: visible;
}

.reverse-card {
  display: grid;
  gap: 10px;
}

.reverse-card strong {
  color: var(--ink);
  line-height: 1.35;
}

.fret-selection-chips,
.reverse-candidates {
  display: grid;
  gap: 7px;
}

.selection-chip,
.reverse-candidate {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.66);
  text-align: left;
  font-weight: 800;
}

.selection-chip {
  font-size: 12px;
}

.reverse-candidate {
  display: grid;
  gap: 2px;
}

.reverse-candidate.active {
  border-color: rgba(36, 120, 255, 0.48);
  color: #0f63d9;
  background: rgba(225, 239, 255, 0.86);
}

.reverse-candidate small,
.muted-line {
  color: var(--muted);
  font-size: 12px;
}

.reverse-actions {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
}

.custom-notes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 14px 0;
}

.custom-recognition {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  border: 1px solid rgba(36, 120, 255, 0.24);
  border-radius: var(--radius);
  padding: 12px;
  background: linear-gradient(180deg, rgba(238, 247, 255, 0.88), rgba(255, 255, 255, 0.66));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
  cursor: grab;
}

.custom-recognition.is-empty {
  color: var(--muted);
  cursor: default;
}

.custom-recognition.dragging {
  opacity: 0.6;
  transform: scale(0.98);
}

.custom-recognition strong {
  display: block;
  margin: 2px 0;
  color: var(--ink);
  font-size: 19px;
}

.custom-recognition small {
  color: var(--muted);
}

.recognition-label {
  color: #1768ee;
  font-size: 12px;
  font-weight: 800;
}

.recognition-badge {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 8px;
  color: #51647e;
  background: rgba(255, 255, 255, 0.76);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.recognition-badge.exact {
  border-color: rgba(36, 120, 255, 0.34);
  color: #1768ee;
  background: rgba(226, 240, 255, 0.86);
}

.custom-note {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px 0;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.62);
}

.custom-note.active {
  color: #fff;
  border-color: rgba(36, 120, 255, 0.5);
  background: linear-gradient(180deg, #5fa2ff, #1768ee);
}

.custom-actions {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 8px;
}

.dashed-btn {
  width: 100%;
  margin-top: 12px;
  border-style: dashed;
  padding: 12px;
  color: #1768ee;
  background: rgba(236, 245, 255, 0.56);
}

.saved-chords {
  display: grid;
  gap: 8px;
  max-height: 190px;
  margin-top: 12px;
  overflow: auto;
}

.saved-chip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  color: #155b71;
  background: rgba(223, 245, 249, 0.74);
  font-size: 13px;
  cursor: grab;
  user-select: none;
}

.saved-chip.dragging {
  opacity: 0.6;
  transform: scale(0.98);
}

.saved-chip button {
  border: 0;
  color: inherit;
  background: transparent;
}

.saved-main {
  flex: 1;
  text-align: left;
}

.saved-actions {
  display: flex;
  gap: 4px;
}

.saved-actions button {
  border: 1px solid rgba(21, 91, 113, 0.18);
  border-radius: 6px;
  padding: 4px 6px;
  background: rgba(255, 255, 255, 0.48);
}

.saved-actions button:last-child {
  color: var(--danger);
}

.export-card {
  display: grid;
  gap: 8px;
}

.export-btn {
  display: grid;
  gap: 3px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  color: var(--ink);
  text-align: left;
  background: rgba(255, 255, 255, 0.58);
}

.export-btn span {
  color: var(--muted);
  font-size: 12px;
}

.help-panel p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.transport {
  grid-column: 2 / 4;
  gap: 16px;
  min-width: 0;
  padding: 16px 20px;
}

.transport-body {
  flex: 1 1 auto;
  gap: 16px;
  min-width: 0;
}

.transport-collapse-toggle {
  flex: 0 0 auto;
  margin-left: auto;
}

.transport.is-collapsed {
  justify-content: flex-end;
  min-height: 0;
  padding: 10px 14px;
}

.transport.is-collapsed .transport-body {
  display: none;
}

.play-modes {
  display: flex;
  gap: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.play-btn {
  padding: 10px 14px;
}

.number-stepper,
.toggle-line,
.volume-line {
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.number-stepper {
  margin-left: auto;
}

.number-stepper button {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 9px;
  background: rgba(255, 255, 255, 0.6);
}

.number-stepper strong {
  min-width: 34px;
  color: var(--ink);
  text-align: center;
}

.number-stepper input {
  width: 92px;
  accent-color: var(--blue);
}

.volume-line input {
  width: 90px;
  accent-color: var(--blue);
}

body.dark {
  --ink: #e9f2ff;
  --muted: #9fb1c7;
  --line: rgba(177, 197, 222, 0.22);
  --glass: rgba(18, 28, 43, 0.68);
  --glass-strong: rgba(25, 38, 58, 0.86);
  --soft-surface: rgba(22, 36, 55, 0.88);
  --soft-surface-strong: rgba(32, 49, 73, 0.92);
  --soft-border: rgba(165, 195, 230, 0.14);
  --soft-shadow: 12px 12px 28px rgba(0, 0, 0, 0.28), -10px -10px 24px rgba(255, 255, 255, 0.035);
  --soft-shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.28), inset 0 0 3px rgba(177, 197, 222, 0.18);
  --soft-shadow-pressed: inset 4px 4px 9px rgba(0, 0, 0, 0.3), inset -4px -4px 9px rgba(255, 255, 255, 0.04);
  background: linear-gradient(135deg, #0d1725, #16253a 46%, #0f2a32);
}

body.dark .app-tab,
body.dark .nav-tab,
body.dark .rail-tab,
body.dark .instrument-tab,
body.dark .fret-mode,
body.dark .piano-key-mode,
body.dark .guitar-string-mode,
body.dark .bass-string-mode,
body.dark .fret-count-mode,
body.dark .fret-memory-mode,
body.dark .fret-memory-instrument,
body.dark .fret-memory-string,
body.dark .fret-memory-range,
body.dark .fret-memory-display,
body.dark .scale-root-button,
body.dark .scale-type-button,
body.dark .scale-instrument,
body.dark .scale-label-mode,
body.dark .scale-fret-range,
body.dark .scale-chord-button,
body.dark .training-category,
body.dark .training-mode,
body.dark .training-note-option,
body.dark .training-choice,
body.dark .play-btn,
body.dark .custom-note,
body.dark .ghost-btn,
body.dark .secondary-btn,
body.dark .icon-btn,
body.dark .transport-btn,
body.dark .dashed-btn {
  border-color: rgba(165, 195, 230, 0.18);
  background-image: linear-gradient(to top, rgba(26, 41, 63, 0.96) 0%, rgba(43, 62, 88, 0.92) 82%, rgba(55, 78, 109, 0.88) 100%);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  text-shadow: none;
}

body.dark .search input,
body.dark .select-pill select,
body.dark .custom-actions input {
  border-color: rgba(165, 195, 230, 0.18);
  background: rgba(22, 35, 53, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

body.dark .search-icon {
  color: #a4b7cf;
}

body.dark .app-tab.active,
body.dark .nav-tab.active,
body.dark .rail-tab.active,
body.dark .instrument-tab.active,
body.dark .fret-mode.active,
body.dark .piano-key-mode.active,
body.dark .guitar-string-mode.active,
body.dark .bass-string-mode.active,
body.dark .fret-count-mode.active,
body.dark .fret-memory-mode.active,
body.dark .fret-memory-instrument.active,
body.dark .fret-memory-string.active,
body.dark .fret-memory-range.active,
body.dark .fret-memory-display.active,
body.dark .scale-root-button.active,
body.dark .scale-type-button.active,
body.dark .scale-instrument.active,
body.dark .scale-label-mode.active,
body.dark .scale-fret-range.active,
body.dark .scale-chord-button.active,
body.dark .training-category.active,
body.dark .training-mode.active,
body.dark .training-note-option.active,
body.dark .training-choice.active,
body.dark .play-btn.active,
body.dark .custom-note.active,
body.dark .chord-item.active {
  border-color: rgba(95, 162, 255, 0.52);
  color: #8fc0ff;
  background: linear-gradient(to top, rgba(22, 70, 130, 0.86) 0%, rgba(40, 78, 122, 0.9) 84%, rgba(54, 96, 146, 0.82) 100%);
  box-shadow: var(--soft-shadow-pressed), 0 8px 16px rgba(36, 120, 255, 0.12);
}

body.dark .white-key {
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.1), transparent 12%, transparent 84%, rgba(0, 0, 0, 0.12)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(217, 230, 245, 0.5)),
    url("assets/piano-ivory-key.png");
  background-size: auto, auto, 100% 100%;
}

body.dark .export-btn,
body.dark .chord-item,
body.dark .progression-chip,
body.dark .custom-note {
  background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 1200px) {
  .app-shell {
    width: 1540px;
    height: 1094px;
    min-height: 1094px;
  }
}

/* KENNEDYY Studio redesign: a compact, dark music-workspace theme. */
:root {
  --ink: #f4f2ef;
  --muted: #a6a2a0;
  --line: rgba(255, 255, 255, 0.11);
  --glass: rgba(16, 16, 18, 0.92);
  --glass-strong: rgba(21, 21, 24, 0.98);
  --blue: #9c91ff;
  --blue-2: #c1b9ff;
  --cyan: #79d5c0;
  --danger: #f07b89;
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.3);
  --radius: 10px;
  --soft-surface: #141416;
  --soft-surface-strong: #19191c;
  --soft-border: rgba(255, 255, 255, 0.1);
  --soft-shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
  --soft-shadow-hover: 0 10px 24px rgba(0, 0, 0, 0.34);
  --soft-shadow-pressed: inset 0 1px 0 rgba(255, 255, 255, 0.08), inset 0 -2px 8px rgba(0, 0, 0, 0.28);
}

body {
  color: var(--ink);
  background:
    radial-gradient(circle at 72% 2%, rgba(108, 91, 196, 0.12), transparent 26%),
    radial-gradient(circle at 8% 80%, rgba(70, 157, 145, 0.08), transparent 24%),
    #080809;
  overflow-x: auto;
}

body.dark {
  --ink: #f4f2ef;
  --muted: #a6a2a0;
  --line: rgba(255, 255, 255, 0.11);
  --glass: rgba(16, 16, 18, 0.92);
  --glass-strong: rgba(21, 21, 24, 0.98);
  --soft-surface: #141416;
  --soft-surface-strong: #19191c;
  --soft-border: rgba(255, 255, 255, 0.1);
  --soft-shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
  --soft-shadow-hover: 0 10px 24px rgba(0, 0, 0, 0.34);
  --soft-shadow-pressed: inset 0 1px 0 rgba(255, 255, 255, 0.08), inset 0 -2px 8px rgba(0, 0, 0, 0.28);
  background:
    radial-gradient(circle at 72% 2%, rgba(108, 91, 196, 0.12), transparent 26%),
    radial-gradient(circle at 8% 80%, rgba(70, 157, 145, 0.08), transparent 24%),
    #080809;
}

body:not(.dark) {
  --ink: #292725;
  --muted: #756f6b;
  --line: rgba(66, 57, 52, 0.14);
  --glass: rgba(249, 247, 243, 0.94);
  --glass-strong: rgba(255, 253, 249, 0.98);
  --soft-surface: #f1eee8;
  --soft-surface-strong: #fbfaf7;
  --soft-border: rgba(65, 57, 52, 0.12);
  --soft-shadow: 0 16px 36px rgba(73, 62, 55, 0.12);
  --soft-shadow-hover: 0 10px 24px rgba(73, 62, 55, 0.16);
  --soft-shadow-pressed: inset 0 1px 0 rgba(255, 255, 255, 0.88), inset 0 -2px 8px rgba(93, 77, 64, 0.12);
  background:
    radial-gradient(circle at 76% 0%, rgba(183, 169, 219, 0.2), transparent 26%),
    #f2f0eb;
}

.ambient {
  background:
    radial-gradient(circle at 68% 4%, rgba(153, 137, 255, 0.08), transparent 22%),
    radial-gradient(circle at 16% 94%, rgba(104, 209, 188, 0.05), transparent 24%);
  filter: none;
}

.app-shell {
  grid-template-columns: 304px minmax(820px, 1fr) 302px;
  gap: 12px;
  width: min(1920px, 100vw);
  padding: 12px;
}

.glass {
  background: linear-gradient(145deg, var(--glass-strong), var(--glass));
  border: 1px solid var(--soft-border);
  border-radius: 12px;
  box-shadow: var(--soft-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(18px) saturate(1.08);
}

body:not(.dark) .glass {
  box-shadow: var(--soft-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.88);
}

.sidebar,
.right-rail,
.workspace {
  gap: 12px;
}

.sidebar {
  padding: 16px;
}

.brand {
  gap: 10px;
  padding-bottom: 14px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #232326;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.24);
}

.brand h1 {
  color: var(--ink);
  font-size: 22px;
  letter-spacing: -0.04em;
}

.brand p,
.eyebrow,
.section-label {
  color: var(--muted);
  letter-spacing: 0.08em;
  font-size: 11px;
}

.app-tabs,
.library-tabs,
.rail-tabs,
.segmented {
  gap: 6px;
}

.app-tab,
.nav-tab,
.rail-tab,
.instrument-tab,
.fret-mode,
.piano-key-mode,
.guitar-string-mode,
.bass-string-mode,
.fret-count-mode,
.fret-memory-mode,
.fret-memory-instrument,
.fret-memory-string,
.fret-memory-range,
.fret-memory-display,
.scale-root-button,
.scale-type-button,
.scale-instrument,
.scale-label-mode,
.scale-fret-range,
.scale-chord-button,
.training-category,
.training-mode,
.training-note-option,
.training-choice,
.play-btn,
.custom-note,
.ghost-btn,
.secondary-btn,
.primary-btn,
.icon-btn,
.transport-btn,
.dashed-btn {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #151517;
  background-image: none;
  box-shadow: none;
  font-weight: 500;
  text-shadow: none;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

body:not(.dark) .app-tab,
body:not(.dark) .nav-tab,
body:not(.dark) .rail-tab,
body:not(.dark) .instrument-tab,
body:not(.dark) .fret-mode,
body:not(.dark) .piano-key-mode,
body:not(.dark) .guitar-string-mode,
body:not(.dark) .bass-string-mode,
body:not(.dark) .fret-count-mode,
body:not(.dark) .fret-memory-mode,
body:not(.dark) .fret-memory-instrument,
body:not(.dark) .fret-memory-string,
body:not(.dark) .fret-memory-range,
body:not(.dark) .fret-memory-display,
body:not(.dark) .scale-root-button,
body:not(.dark) .scale-type-button,
body:not(.dark) .scale-instrument,
body:not(.dark) .scale-label-mode,
body:not(.dark) .scale-fret-range,
body:not(.dark) .scale-chord-button,
body:not(.dark) .training-category,
body:not(.dark) .training-mode,
body:not(.dark) .training-note-option,
body:not(.dark) .training-choice,
body:not(.dark) .play-btn,
body:not(.dark) .custom-note,
body:not(.dark) .ghost-btn,
body:not(.dark) .secondary-btn,
body:not(.dark) .primary-btn,
body:not(.dark) .icon-btn,
body:not(.dark) .transport-btn,
body:not(.dark) .dashed-btn {
  color: var(--muted);
  background: #fbfaf7;
}

.app-tab,
.nav-tab,
.rail-tab {
  min-height: 42px;
  padding: 9px 10px;
  line-height: 1.2;
}

.app-tab:hover,
.nav-tab:hover,
.rail-tab:hover,
.instrument-tab:hover,
.fret-mode:hover,
.piano-key-mode:hover,
.guitar-string-mode:hover,
.bass-string-mode:hover,
.fret-count-mode:hover,
.fret-memory-mode:hover,
.fret-memory-instrument:hover,
.fret-memory-string:hover,
.fret-memory-range:hover,
.fret-memory-display:hover,
.scale-root-button:hover,
.scale-type-button:hover,
.scale-instrument:hover,
.scale-label-mode:hover,
.scale-fret-range:hover,
.scale-chord-button:hover,
.training-category:hover,
.training-mode:hover,
.training-note-option:hover,
.training-choice:hover,
.ghost-btn:hover,
.secondary-btn:hover,
.primary-btn:hover,
.icon-btn:hover,
.transport-btn:hover,
.dashed-btn:hover {
  color: var(--ink);
  border-color: rgba(156, 145, 255, 0.46);
  background: #1c1c20;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

body:not(.dark) .app-tab:hover,
body:not(.dark) .nav-tab:hover,
body:not(.dark) .rail-tab:hover,
body:not(.dark) .instrument-tab:hover,
body:not(.dark) .fret-mode:hover,
body:not(.dark) .piano-key-mode:hover,
body:not(.dark) .guitar-string-mode:hover,
body:not(.dark) .bass-string-mode:hover,
body:not(.dark) .fret-count-mode:hover,
body:not(.dark) .fret-memory-mode:hover,
body:not(.dark) .fret-memory-instrument:hover,
body:not(.dark) .fret-memory-string:hover,
body:not(.dark) .fret-memory-range:hover,
body:not(.dark) .fret-memory-display:hover,
body:not(.dark) .scale-root-button:hover,
body:not(.dark) .scale-type-button:hover,
body:not(.dark) .scale-instrument:hover,
body:not(.dark) .scale-label-mode:hover,
body:not(.dark) .scale-fret-range:hover,
body:not(.dark) .scale-chord-button:hover,
body:not(.dark) .training-category:hover,
body:not(.dark) .training-mode:hover,
body:not(.dark) .training-note-option:hover,
body:not(.dark) .training-choice:hover,
body:not(.dark) .ghost-btn:hover,
body:not(.dark) .secondary-btn:hover,
body:not(.dark) .primary-btn:hover,
body:not(.dark) .icon-btn:hover,
body:not(.dark) .transport-btn:hover,
body:not(.dark) .dashed-btn:hover {
  background: #f3f0ea;
}

.app-tab:active,
.nav-tab:active,
.rail-tab:active,
.instrument-tab:active,
.fret-mode:active,
.piano-key-mode:active,
.guitar-string-mode:active,
.bass-string-mode:active,
.fret-count-mode:active,
.fret-memory-mode:active,
.fret-memory-instrument:active,
.fret-memory-string:active,
.fret-memory-range:active,
.fret-memory-display:active,
.scale-root-button:active,
.scale-type-button:active,
.scale-instrument:active,
.scale-label-mode:active,
.scale-fret-range:active,
.scale-chord-button:active,
.training-category:active,
.training-mode:active,
.training-note-option:active,
.training-choice:active,
.ghost-btn:active,
.secondary-btn:active,
.primary-btn:active,
.icon-btn:active,
.transport-btn:active,
.dashed-btn:active {
  transform: translateY(0);
  box-shadow: var(--soft-shadow-pressed);
}

.app-tab.active,
.nav-tab.active,
.rail-tab.active,
.instrument-tab.active,
.fret-mode.active,
.piano-key-mode.active,
.guitar-string-mode.active,
.bass-string-mode.active,
.fret-count-mode.active,
.fret-memory-mode.active,
.fret-memory-instrument.active,
.fret-memory-string.active,
.fret-memory-range.active,
.fret-memory-display.active,
.scale-root-button.active,
.scale-type-button.active,
.scale-instrument.active,
.scale-label-mode.active,
.scale-fret-range.active,
.scale-chord-button.active,
.training-category.active,
.training-mode.active,
.training-note-option.active,
.training-choice.active,
.custom-note.active,
.chord-item.active {
  border-color: rgba(156, 145, 255, 0.74);
  color: #e6e1ff;
  background: rgba(91, 80, 170, 0.36);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 0 0 1px rgba(156, 145, 255, 0.08);
}

body:not(.dark) .app-tab.active,
body:not(.dark) .nav-tab.active,
body:not(.dark) .rail-tab.active,
body:not(.dark) .instrument-tab.active,
body:not(.dark) .fret-mode.active,
body:not(.dark) .piano-key-mode.active,
body:not(.dark) .guitar-string-mode.active,
body:not(.dark) .bass-string-mode.active,
body:not(.dark) .fret-count-mode.active,
body:not(.dark) .fret-memory-mode.active,
body:not(.dark) .fret-memory-instrument.active,
body:not(.dark) .fret-memory-string.active,
body:not(.dark) .fret-memory-range.active,
body:not(.dark) .fret-memory-display.active,
body:not(.dark) .scale-root-button.active,
body:not(.dark) .scale-type-button.active,
body:not(.dark) .scale-instrument.active,
body:not(.dark) .scale-label-mode.active,
body:not(.dark) .scale-fret-range.active,
body:not(.dark) .scale-chord-button.active,
body:not(.dark) .training-category.active,
body:not(.dark) .training-mode.active,
body:not(.dark) .training-note-option.active,
body:not(.dark) .training-choice.active,
body:not(.dark) .custom-note.active,
body:not(.dark) .chord-item.active {
  color: #4d438e;
  background: rgba(219, 214, 255, 0.72);
}

.search input,
.select-pill select,
.compact-select,
.compact-input,
.custom-actions input {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #111113;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.045);
}

body:not(.dark) .search input,
body:not(.dark) .select-pill select,
body:not(.dark) .compact-select,
body:not(.dark) .compact-input,
body:not(.dark) .custom-actions input {
  background: #fffdfa;
}

.search input:focus,
.select-pill select:focus,
.compact-select:focus,
.compact-input:focus,
.custom-actions input:focus {
  border-color: rgba(156, 145, 255, 0.74);
  outline: 2px solid rgba(156, 145, 255, 0.12);
}

.search-icon {
  color: #b2aaff;
}

.filter-group,
.scale-side-card,
.scale-info-card,
.training-mini-item,
.custom-recognition,
.fret-practice-panel,
.arpeggio-panel,
.timeline,
.progression-chip,
.selection-chip,
.reverse-candidate {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.035);
  box-shadow: none;
}

body:not(.dark) .filter-group,
body:not(.dark) .scale-side-card,
body:not(.dark) .scale-info-card,
body:not(.dark) .training-mini-item,
body:not(.dark) .custom-recognition,
body:not(.dark) .fret-practice-panel,
body:not(.dark) .arpeggio-panel,
body:not(.dark) .timeline,
body:not(.dark) .progression-chip,
body:not(.dark) .selection-chip,
body:not(.dark) .reverse-candidate {
  background: rgba(255, 253, 249, 0.78);
}

.filter-chip,
.fret-note-button,
.note-pill,
.degree-pill,
.chord-item,
.progression-chip button,
.number-stepper button {
  border-color: var(--line);
  border-radius: 7px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.045);
  box-shadow: none;
}

body:not(.dark) .filter-chip,
body:not(.dark) .fret-note-button,
body:not(.dark) .note-pill,
body:not(.dark) .degree-pill,
body:not(.dark) .chord-item,
body:not(.dark) .progression-chip button,
body:not(.dark) .number-stepper button {
  background: rgba(255, 253, 249, 0.8);
}

.filter-chip.active,
.fret-note-button.active,
.note-pill.active-note {
  border-color: rgba(156, 145, 255, 0.72);
  color: #f5f2ff;
  background: #5a50a9;
  box-shadow: 0 8px 18px rgba(90, 80, 169, 0.22);
}

.workspace {
  grid-template-rows: 72px 148px minmax(380px, auto) 214px;
}

.topbar {
  padding: 12px 16px;
}

.chord-title h2 {
  color: var(--ink);
  font-size: 40px;
  letter-spacing: -0.06em;
}

.star-btn {
  color: var(--muted);
}

.star-btn.is-on {
  color: var(--blue-2);
}

.quality-badge {
  border-color: rgba(156, 145, 255, 0.32);
  color: var(--blue-2);
  background: rgba(91, 80, 170, 0.18);
}

.detail-strip {
  gap: 12px;
  padding: 14px 16px;
}

.note-pill,
.degree-pill {
  min-width: 48px;
  padding: 8px 10px;
}

.formula-text {
  color: var(--ink);
  font-size: 22px;
}

.color-copy p:last-child {
  line-height: 1.5;
}

.instrument-panel,
.progression,
.rail-card,
.fret-memory-page,
.scale-page,
.training-page {
  padding: 14px;
}

.panel-title h3,
.fret-memory-header h2,
.scale-header h2,
.training-header h2 {
  color: var(--ink);
  letter-spacing: -0.04em;
}

.panel-title h3 {
  font-size: 20px;
}

.instrument-tools {
  gap: 8px;
}

.instrument-tools p {
  color: var(--muted);
}

.piano {
  border-color: rgba(255, 255, 255, 0.12);
  background:
    linear-gradient(180deg, #1c1c20 0, #111114 22px, transparent 22px),
    linear-gradient(180deg, #dedbd4, #bdbab5);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12), inset 0 -20px 34px rgba(0, 0, 0, 0.25), 0 18px 30px rgba(0, 0, 0, 0.28);
}

.white-key {
  border-color: rgba(35, 32, 30, 0.28);
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.1), transparent 12%, transparent 84%, rgba(0, 0, 0, 0.12)),
    linear-gradient(180deg, #f4f1eb, #cbc7bf),
    url("assets/piano-ivory-key.png");
  background-size: auto, auto, 100% 100%;
}

.fretboard {
  border-color: rgba(255, 255, 255, 0.13);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), inset 0 -24px 28px rgba(0, 0, 0, 0.38), inset 14px 0 22px rgba(0, 0, 0, 0.28), inset -14px 0 22px rgba(255, 255, 255, 0.025), 0 18px 30px rgba(0, 0, 0, 0.3);
}

.fretboard::after {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 12%, transparent 88%, rgba(0, 0, 0, 0.3)), linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 8%, transparent 92%, rgba(0, 0, 0, 0.25));
}

.fret-number-row,
.memory-fret-number-row {
  color: var(--muted);
}

.progression {
  padding: 14px 16px;
}

.progression-chip.playing,
.progression-chip.selected,
.reverse-candidate.active {
  border-color: rgba(156, 145, 255, 0.72);
  box-shadow: 0 0 0 1px rgba(156, 145, 255, 0.14);
}

.progression-chip strong,
.reverse-card strong,
.custom-recognition strong {
  color: var(--ink);
}

.right-rail {
  gap: 12px;
}

.rail-card {
  border-radius: 12px;
}

.primary-btn,
.play-btn {
  border-color: rgba(156, 145, 255, 0.78);
  color: #f6f3ff;
  background: #6659c4;
  box-shadow: 0 10px 24px rgba(102, 89, 196, 0.24);
}

.primary-btn:hover,
.play-btn:hover {
  color: #fff;
  background: #7669d4;
}

.transport {
  gap: 14px;
  padding: 12px 16px;
}

.play-modes {
  border-left-color: var(--line);
}

input[type="range"] {
  accent-color: var(--blue);
}

body:not(.dark) .primary-btn,
body:not(.dark) .play-btn {
  color: #fff;
  background: #6557bd;
}

body.dark :is(
  .app-tab,
  .nav-tab,
  .rail-tab,
  .instrument-tab,
  .fret-mode,
  .piano-key-mode,
  .guitar-string-mode,
  .bass-string-mode,
  .fret-count-mode,
  .fret-memory-mode,
  .fret-memory-instrument,
  .fret-memory-string,
  .fret-memory-range,
  .fret-memory-display,
  .scale-root-button,
  .scale-type-button,
  .scale-instrument,
  .scale-label-mode,
  .scale-fret-range,
  .scale-chord-button,
  .training-category,
  .training-mode,
  .training-note-option,
  .training-choice,
  .custom-note,
  .ghost-btn,
  .secondary-btn,
  .primary-btn,
  .icon-btn,
  .transport-btn,
  .dashed-btn
) {
  border-color: var(--line);
  color: var(--muted);
  background: #151517;
  background-image: none;
  box-shadow: none;
  text-shadow: none;
}

body.dark :is(
  .app-tab.active,
  .nav-tab.active,
  .rail-tab.active,
  .instrument-tab.active,
  .fret-mode.active,
  .piano-key-mode.active,
  .guitar-string-mode.active,
  .bass-string-mode.active,
  .fret-count-mode.active,
  .fret-memory-mode.active,
  .fret-memory-instrument.active,
  .fret-memory-string.active,
  .fret-memory-range.active,
  .fret-memory-display.active,
  .scale-root-button.active,
  .scale-type-button.active,
  .scale-instrument.active,
  .scale-label-mode.active,
  .scale-fret-range.active,
  .scale-chord-button.active,
  .training-category.active,
  .training-mode.active,
  .training-note-option.active,
  .training-choice.active,
  .custom-note.active,
  .chord-item.active
) {
  border-color: rgba(156, 145, 255, 0.74);
  color: #e6e1ff;
  background: rgba(91, 80, 170, 0.36);
  background-image: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 0 0 1px rgba(156, 145, 255, 0.08);
}

/* Keep the selected instrument in a persistent dock below the working controls. */
body.instrument-expanded .app-shell {
  grid-template-columns: 286px minmax(820px, 1fr) 288px;
  grid-template-rows: 72px 150px minmax(64px, auto) auto 68px;
  min-width: 1540px;
  height: auto;
  min-height: 100vh;
  align-items: start;
}

body.instrument-expanded.progression-collapsed .app-shell,
body.instrument-expanded.transport-collapsed .app-shell,
body.instrument-expanded.progression-collapsed.transport-collapsed .app-shell {
  grid-template-rows: 72px 150px 64px auto 58px;
}

body.instrument-expanded.transport-collapsed:not(.fret-memory-active):not(.scale-active):not(.training-active):not(.progression-collapsed) .app-shell {
  grid-template-rows: 72px 150px minmax(198px, auto) auto 58px;
}

body.instrument-expanded.transport-collapsed.progression-collapsed:not(.fret-memory-active):not(.scale-active):not(.training-active) .app-shell {
  grid-template-rows: 72px 150px 64px auto 58px;
}

body.instrument-expanded .sidebar,
body.instrument-expanded .right-rail {
  align-self: stretch;
  height: auto;
  min-height: 0;
  max-height: none;
  overflow: auto;
}

body.instrument-expanded .instrument-panel {
  min-height: 0;
  padding: 16px;
  overflow: visible;
}

@media (max-width: 1200px) {
  body.instrument-expanded .app-shell {
    width: 1540px;
  }
}

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

/* Reference-dashboard tool UI: compact graphite workspace with warm inverse picker. */
:root {
  --studio-canvas: #08090b;
  --studio-surface: #101115;
  --studio-surface-raised: #15161b;
  --studio-surface-soft: #191a20;
  --studio-border: rgba(255, 255, 255, 0.1);
  --studio-border-strong: rgba(255, 255, 255, 0.17);
  --studio-text: #f2f1ee;
  --studio-muted: #9698a2;
  --studio-accent: #8d82ff;
  --studio-accent-soft: rgba(141, 130, 255, 0.18);
  --studio-success: #67d0ba;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--studio-canvas);
  color: var(--studio-text);
}

body:not(.dark) {
  --studio-canvas: #e9e9e5;
  --studio-surface: #f7f5f0;
  --studio-surface-raised: #fffdf8;
  --studio-surface-soft: #efede7;
  --studio-border: rgba(36, 34, 31, 0.12);
  --studio-border-strong: rgba(36, 34, 31, 0.2);
  --studio-text: #202124;
  --studio-muted: #77756f;
  --studio-accent: #6259bd;
  --studio-accent-soft: rgba(98, 89, 189, 0.12);
  --studio-success: #268f7a;
  color: var(--studio-text);
  background: #e9e9e5;
}

.ambient {
  display: none;
}

.glass {
  border: 1px solid var(--studio-border);
  border-radius: 10px;
  background: var(--studio-surface);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 10px 28px rgba(0, 0, 0, 0.16);
  backdrop-filter: none;
}

body:not(.dark) .glass {
  background: var(--studio-surface);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.88), 0 12px 30px rgba(73, 67, 58, 0.09);
}

.app-shell,
body.instrument-expanded .app-shell {
  width: 100%;
  min-width: 0;
  min-height: 100vh;
  height: auto;
  grid-template-columns: minmax(218px, 236px) minmax(0, 1fr) minmax(232px, 252px);
  grid-template-rows: 64px 132px minmax(64px, 154px) minmax(390px, auto) auto;
  gap: 10px;
  padding: 10px;
  align-items: stretch;
}

body.instrument-expanded.progression-collapsed .app-shell,
body.instrument-expanded.transport-collapsed .app-shell,
body.instrument-expanded.progression-collapsed.transport-collapsed .app-shell,
body.instrument-expanded.transport-collapsed:not(.fret-memory-active):not(.scale-active):not(.training-active):not(.progression-collapsed) .app-shell,
body.instrument-expanded.transport-collapsed.progression-collapsed:not(.fret-memory-active):not(.scale-active):not(.training-active) .app-shell {
  grid-template-rows: 64px 132px 64px minmax(390px, auto) auto;
}

body.instrument-expanded .sidebar,
body.instrument-expanded .right-rail {
  align-self: stretch;
  width: auto;
  height: auto;
  min-height: 0;
  max-height: none;
  overflow: hidden;
}

body.instrument-expanded .sidebar {
  grid-row: 1 / 4;
  padding: 14px;
}

body.instrument-expanded .right-rail {
  grid-row: 1 / 4;
  padding: 0 2px 0 0;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

#chordSidebarContent {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
  overflow: hidden;
}

body.instrument-expanded .filter-board {
  min-height: 80px;
  max-height: none;
  flex: 1 1 auto;
  margin: 10px 0 8px;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

body.instrument-expanded .library-header {
  margin: 2px 0 0;
  padding-top: 8px;
  border-top: 1px solid var(--studio-border);
}

body.instrument-expanded .topbar {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  padding: 10px 14px;
}

body.instrument-expanded .detail-strip {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  gap: 10px;
  padding: 12px 14px;
}

body.instrument-expanded .progression {
  grid-column: 2;
  grid-row: 3;
  min-width: 0;
}

body.instrument-expanded .instrument-panel {
  grid-column: 1 / 4;
  grid-row: 4;
  min-width: 0;
  min-height: 390px;
  padding: 14px;
  overflow: hidden;
}

body.instrument-expanded .transport {
  grid-column: 1 / 4;
  grid-row: 5;
}

.brand {
  padding-bottom: 10px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border: 1px solid var(--studio-border);
  border-radius: 8px;
  box-shadow: none;
}

.brand h1 {
  color: var(--studio-text);
  font-size: 19px;
  letter-spacing: 0;
}

.brand p,
.eyebrow,
.section-label {
  color: var(--studio-muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.app-tabs,
.library-tabs {
  gap: 5px;
  margin-bottom: 9px;
}

.app-tab,
.nav-tab,
.rail-tab,
.instrument-tab,
.fret-mode,
.piano-key-mode,
.guitar-string-mode,
.bass-string-mode,
.fret-count-mode,
.ghost-btn,
.secondary-btn,
.icon-btn,
.transport-btn,
.play-btn,
.dashed-btn {
  min-height: 32px;
  border: 1px solid var(--studio-border);
  border-radius: 7px;
  color: var(--studio-muted);
  background: var(--studio-surface-raised);
  background-image: none;
  box-shadow: none;
  font-weight: 600;
  text-shadow: none;
}

.app-tab,
.nav-tab,
.rail-tab {
  min-height: 38px;
  padding: 7px 8px;
}

.app-tab:hover,
.nav-tab:hover,
.rail-tab:hover,
.instrument-tab:hover,
.fret-mode:hover,
.piano-key-mode:hover,
.guitar-string-mode:hover,
.bass-string-mode:hover,
.fret-count-mode:hover,
.ghost-btn:hover,
.secondary-btn:hover,
.icon-btn:hover,
.transport-btn:hover,
.play-btn:hover,
.dashed-btn:hover {
  border-color: var(--studio-border-strong);
  color: var(--studio-text);
  background: var(--studio-surface-soft);
  box-shadow: none;
  transform: none;
}

:is(.app-tab, .nav-tab, .rail-tab, .instrument-tab, .fret-mode, .piano-key-mode, .guitar-string-mode, .bass-string-mode, .fret-count-mode, .play-btn).active {
  border-color: rgba(141, 130, 255, 0.58);
  color: var(--studio-text);
  background: var(--studio-accent-soft);
  box-shadow: inset 3px 0 0 var(--studio-accent);
}

.search {
  gap: 5px;
  color: var(--studio-muted);
}

.search input {
  min-height: 38px;
  border: 1px solid var(--studio-border);
  border-radius: 7px;
  padding: 9px 36px 9px 11px;
  color: var(--studio-text);
  background: var(--studio-surface-raised);
  box-shadow: none;
}

.search input:focus {
  border-color: rgba(141, 130, 255, 0.72);
  background: var(--studio-surface-raised);
  box-shadow: 0 0 0 3px rgba(141, 130, 255, 0.12);
}

.search-icon {
  right: 10px;
  width: 18px;
  height: 18px;
  color: var(--studio-accent);
}

.filter-group {
  border-color: var(--studio-border);
  border-radius: 8px;
  padding: 8px;
  background: var(--studio-surface-raised);
}

.filter-group-title {
  color: var(--studio-text);
  font-size: 12px;
}

.filter-chip {
  border-color: var(--studio-border);
  color: var(--studio-muted);
  background: var(--studio-surface-soft);
}

.filter-chip.active {
  border-color: rgba(141, 130, 255, 0.56);
  color: var(--studio-text);
  background: var(--studio-accent-soft);
  box-shadow: inset 0 0 0 1px rgba(141, 130, 255, 0.1);
}

.chord-title h2 {
  color: var(--studio-text);
  font-size: clamp(30px, 3vw, 38px);
  letter-spacing: 0;
}

.detail-strip > div:not(:last-child) {
  border-right-color: var(--studio-border);
}

.instrument-tools {
  align-items: flex-start;
  justify-content: flex-start;
  gap: 6px;
  flex-wrap: wrap;
}

.instrument-tools p {
  margin-left: auto;
  color: var(--studio-muted);
}

.instrument-view,
body.instrument-expanded .instrument-view {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-gutter: stable;
}

.progression,
.rail-card,
.instrument-panel {
  border-color: var(--studio-border);
}

.right-rail .rail-card {
  padding: 12px;
}

.chord-picker-overlay[hidden] {
  display: none;
}

.chord-picker-overlay {
  position: fixed;
  inset: 0;
  z-index: 1800;
  display: grid;
  place-items: center;
  padding: 24px;
}

.chord-picker-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 0;
  background: rgba(4, 5, 7, 0.7);
  backdrop-filter: blur(8px);
}

.chord-picker-dialog {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: min(720px, calc(100vw - 36px));
  max-height: min(74vh, 660px);
  overflow: hidden;
  border: 1px solid rgba(45, 39, 34, 0.14);
  border-radius: 14px;
  padding: 18px;
  color: #23201e;
  background: #f4f0e8;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  animation: chord-picker-enter 0.2s ease-out both;
}

.chord-picker-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 2px 2px 14px;
  border-bottom: 1px solid rgba(45, 39, 34, 0.12);
}

.chord-picker-header h2,
.chord-picker-header p {
  margin: 0;
}

.chord-picker-header h2 {
  margin-top: 4px;
  font-size: 26px;
  letter-spacing: 0;
}

.chord-picker-header #chordPickerDescription {
  margin-top: 5px;
  color: #716b65;
  font-size: 13px;
}

.chord-picker-close {
  display: grid;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  place-items: center;
  border: 1px solid rgba(45, 39, 34, 0.14);
  border-radius: 8px;
  color: #292522;
  background: rgba(255, 255, 255, 0.56);
  font-size: 24px;
  line-height: 1;
}

.chord-picker-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
  min-height: 0;
  margin-top: 14px;
  padding: 0 6px 0 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.chord-picker-list .chord-item,
body.dark .chord-picker-list .chord-item,
body:not(.dark) .chord-picker-list .chord-item {
  min-width: 0;
  border-color: rgba(45, 39, 34, 0.12);
  border-radius: 8px;
  color: #292522;
  background: rgba(255, 255, 255, 0.56);
}

.chord-picker-list .chord-item:hover {
  border-color: rgba(98, 89, 189, 0.34);
  background: #fffdf8;
}

.chord-picker-list .chord-item.active,
body.dark .chord-picker-list .chord-item.active,
body:not(.dark) .chord-picker-list .chord-item.active {
  border-color: rgba(98, 89, 189, 0.5);
  color: #433b85;
  background: rgba(98, 89, 189, 0.12);
  box-shadow: inset 3px 0 0 #6259bd;
}

.chord-picker-list .chord-item small {
  color: #77716a;
}

body.chord-picker-open {
  overflow: hidden;
}

@keyframes chord-picker-enter {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 1180px) {
  .app-shell,
  body.instrument-expanded .app-shell {
    grid-template-columns: minmax(210px, 228px) minmax(0, 1fr);
    grid-template-rows: 64px 132px minmax(64px, 154px) auto minmax(390px, auto) auto;
  }

  body.instrument-expanded .sidebar {
    grid-column: 1;
    grid-row: 1 / 4;
  }

  body.instrument-expanded .topbar,
  body.instrument-expanded .detail-strip,
  body.instrument-expanded .progression {
    grid-column: 2;
  }

  body.instrument-expanded .right-rail {
    display: grid;
    grid-column: 1 / 3;
    grid-row: 4;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    overflow: visible;
  }

  body.instrument-expanded .instrument-panel {
    grid-column: 1 / 3;
    grid-row: 5;
  }

  body.instrument-expanded .transport {
    grid-column: 1 / 3;
    grid-row: 6;
  }
}

@media (max-width: 760px) {
  .app-shell,
  body.instrument-expanded .app-shell {
    display: flex;
    width: 100%;
    min-width: 0;
    flex-direction: column;
  }

  body.instrument-expanded .sidebar,
  body.instrument-expanded .right-rail,
  body.instrument-expanded .topbar,
  body.instrument-expanded .detail-strip,
  body.instrument-expanded .progression,
  body.instrument-expanded .instrument-panel,
  body.instrument-expanded .transport {
    width: 100%;
    max-height: none;
  }

  body.instrument-expanded .sidebar {
    min-height: 460px;
  }

  body.instrument-expanded .right-rail {
    display: grid;
    grid-template-columns: 1fr;
  }

  .topbar,
  .detail-strip,
  .panel-title,
  .top-actions {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .detail-strip {
    grid-template-columns: 1fr 1fr;
  }

  .chord-picker-dialog {
    max-height: 82vh;
    padding: 14px;
  }

  .chord-picker-list {
    grid-template-columns: 1fr;
  }
}

/* Stable workspace layout: side rails keep their own height and never squeeze the tool stack. */
body.instrument-expanded .app-shell {
  display: grid;
  grid-template-columns: minmax(220px, 236px) minmax(0, 1fr) minmax(250px, 272px);
  grid-template-rows: auto auto !important;
  gap: 10px;
  width: 100%;
  min-width: 0;
  min-height: 100vh;
  height: auto;
  padding: 10px;
  align-items: start;
}

body.instrument-expanded .workspace {
  display: grid;
  grid-column: 2;
  grid-row: 1;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto auto minmax(440px, auto) !important;
  gap: 10px;
  min-width: 0;
  min-height: 0;
}

body.instrument-expanded .sidebar,
body.instrument-expanded .right-rail {
  position: sticky;
  top: 10px;
  align-self: start;
  height: calc(100vh - 20px);
  min-height: 560px;
  max-height: calc(100vh - 20px);
}

body.instrument-expanded .sidebar {
  grid-column: 1;
  grid-row: 1 / 3;
  padding: 14px;
  overflow: hidden;
}

body.instrument-expanded .right-rail {
  grid-column: 3;
  grid-row: 1 / 3;
  padding: 0 3px 0 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

body.instrument-expanded .topbar,
body.instrument-expanded .detail-strip,
body.instrument-expanded .progression,
body.instrument-expanded .instrument-panel {
  grid-column: 1;
  width: 100%;
  min-width: 0;
}

body.instrument-expanded .topbar {
  grid-row: 1;
  min-height: 70px;
}

body.instrument-expanded .detail-strip {
  grid-row: 2;
  min-height: 148px;
  grid-template-columns: minmax(150px, 1fr) minmax(150px, 0.9fr) minmax(120px, 0.72fr) minmax(210px, 1.45fr);
}

body.instrument-expanded .progression {
  grid-row: 3;
  min-height: 64px;
  overflow: hidden;
}

body.instrument-expanded:not(.progression-collapsed) .progression {
  min-height: 210px;
}

body.instrument-expanded .instrument-panel {
  grid-row: 4;
  min-height: 440px;
  padding: 14px;
  overflow: hidden;
}

body.instrument-expanded .transport {
  grid-column: 2;
  grid-row: 2;
  width: 100%;
  min-width: 0;
  overflow: hidden;
  flex-wrap: wrap;
}

body.instrument-expanded .transport-body,
body.instrument-expanded .play-modes {
  min-width: 0;
  flex-wrap: wrap;
}

body.instrument-expanded .transport-body {
  width: 100%;
  gap: 8px 10px;
}

body.instrument-expanded .number-stepper,
body.instrument-expanded .toggle-line,
body.instrument-expanded .volume-line {
  flex: 0 1 auto;
}

body.instrument-expanded .progression-body,
body.instrument-expanded .timeline,
body.instrument-expanded .progression-chips {
  min-width: 0;
  max-width: 100%;
}

body.instrument-expanded .progression-chips {
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
}

body.instrument-expanded #chordSidebarContent {
  min-height: 0;
  flex: 1 1 auto;
}

body.instrument-expanded .filter-board {
  min-height: 0;
  max-height: none;
  flex: 1 1 auto;
  overflow-x: hidden;
  overflow-y: auto;
}

body.instrument-expanded .instrument-view {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-gutter: stable;
}

/* The other learning modes use the same usable two-column shell instead of a forced 1480px canvas. */
body.fret-memory-active .app-shell,
body.scale-active .app-shell,
body.training-active .app-shell {
  display: grid;
  grid-template-columns: minmax(220px, 236px) minmax(0, 1fr);
  grid-template-rows: auto;
  gap: 10px;
  width: 100%;
  min-width: 0;
  min-height: 100vh;
  height: auto;
  padding: 10px;
  align-items: start;
}

body.fret-memory-active .sidebar,
body.scale-active .sidebar,
body.training-active .sidebar {
  position: sticky;
  top: 10px;
  grid-column: 1;
  grid-row: 1;
  height: calc(100vh - 20px);
  min-height: 560px;
  max-height: calc(100vh - 20px);
  overflow: hidden;
}

body.fret-memory-active .workspace,
body.scale-active .workspace,
body.training-active .workspace {
  display: grid;
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto;
}

@media (max-width: 1100px) and (min-width: 761px) {
  body.instrument-expanded .app-shell {
    grid-template-columns: minmax(210px, 224px) minmax(0, 1fr);
    grid-template-rows: auto auto auto;
  }

  body.instrument-expanded .sidebar {
    grid-column: 1;
    grid-row: 1 / 4;
  }

  body.instrument-expanded .workspace {
    grid-column: 2;
    grid-row: 1;
  }

  body.instrument-expanded .right-rail {
    position: static;
    display: grid;
    grid-column: 2;
    grid-row: 2;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    height: auto;
    min-height: 0;
    max-height: none;
    gap: 10px;
    padding: 0;
    overflow: visible;
  }

  body.instrument-expanded .transport {
    grid-column: 2;
    grid-row: 3;
  }
}

@media (max-width: 760px) {
  body.instrument-expanded .app-shell,
  body.fret-memory-active .app-shell,
  body.scale-active .app-shell,
  body.training-active .app-shell {
    display: flex;
    width: 100%;
    min-width: 0;
    padding: 8px;
    flex-direction: column;
  }

  body.instrument-expanded .sidebar,
  body.instrument-expanded .right-rail,
  body.instrument-expanded .workspace,
  body.instrument-expanded .transport,
  body.fret-memory-active .sidebar,
  body.fret-memory-active .workspace,
  body.scale-active .sidebar,
  body.scale-active .workspace,
  body.training-active .sidebar,
  body.training-active .workspace {
    position: static;
    width: 100%;
    height: auto;
    min-height: 0;
    max-height: none;
  }

  body.instrument-expanded .sidebar,
  body.fret-memory-active .sidebar,
  body.scale-active .sidebar,
  body.training-active .sidebar {
    overflow: visible;
  }

  body.instrument-expanded #chordSidebarContent {
    min-height: 480px;
  }

  body.instrument-expanded .filter-board {
    max-height: 360px;
    flex: 0 1 auto;
  }

  body.instrument-expanded .right-rail {
    display: grid;
    grid-template-columns: 1fr;
  }

  body.instrument-expanded .detail-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  body.instrument-expanded .instrument-panel {
    min-height: 400px;
  }
}