:root {
  --app-bg: #f4f6f8;
  --panel-bg: #ffffff;
  --ink: #17191c;
  --muted: #667085;
  --line: #d7dde5;
  --header: #202124;
  --scale-major: #166534;
  --natural-minor: #6d28d9;
  --harmonic-minor: #be185d;
  --melodic-minor: #0369a1;
  --major: #0f766e;
  --minor: #b9472f;
  --arpeggio: #7c3aed;
  --triad: #0f5f8f;
  --guide: #be123c;
  --target: #c48a12;
  --vocabulary: #2563eb;
  --blend: #255c99;
  --string: #9aa4b2;
  --fret: #b8c0cc;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--app-bg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-footer {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: auto;
  padding: .75rem 1rem;
  color: var(--muted);
  font-size: .78rem;
}

.app-footer a {
  color: inherit;
}

.app-footer a:hover,
.app-footer a:focus {
  color: var(--ink);
}

.repertoire-filters {
  display: grid;
  grid-template-columns: minmax(14rem, 2fr) repeat(3, minmax(9rem, 1fr));
  gap: .75rem;
  margin-bottom: 1.25rem;
}

.repertoire-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
  gap: 1rem;
}

.repertoire-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.repertoire-card-header {
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
}

.repertoire-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
}

.repertoire-artist {
  margin: .2rem 0 0;
  color: var(--muted);
  font-size: .88rem;
}

.repertoire-context-label {
  margin: .8rem 0 .45rem;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.repertoire-contexts {
  display: grid;
  gap: .55rem;
}

.repertoire-contexts .repertoire-context-label:not(:first-child) {
  margin-top: .35rem;
}

.repertoire-progression-context .progression-match {
  font-size: .58rem;
}

.repertoire-context {
  padding: .65rem;
  border-radius: 8px;
  background: var(--app-bg);
}

.repertoire-context-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .35rem .75rem;
  font-size: .8rem;
}

.repertoire-context-heading span,
.repertoire-context p {
  color: var(--muted);
}

.repertoire-context p {
  margin: .35rem 0 0;
  font-size: .78rem;
  line-height: 1.45;
}

.repertoire-links {
  margin-top: auto;
  padding-top: .85rem;
}

.repertoire-empty {
  padding: 2rem 0;
  text-align: center;
}

.app-header {
  position: relative;
  color: #fff;
  background: var(--header);
  border-bottom: 4px solid var(--target);
  padding: 2rem 0;
}

.locale-switcher {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  display: inline-flex;
  gap: 0.15rem;
  padding: 0.18rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
}

.locale-switcher button {
  min-width: 2.2rem;
  padding: 0.2rem 0.45rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.locale-switcher button.is-active {
  background: var(--ink);
  color: #fff;
}

.app-title {
  font-size: clamp(2rem, 4vw, 4.25rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: .98;
}

.title-accent {
  color: #f4c866;
}

.app-subtitle,
.panel-copy {
  color: var(--muted);
}

.app-subtitle {
  max-width: 46rem;
  color: #c9d0da;
  font-size: 1rem;
}

.tool-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.tool-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.15rem;
  padding: .35rem .8rem;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 8px;
  color: #f4f6f8;
  font-size: .86rem;
  font-weight: 800;
  text-decoration: none;
}

.tool-nav-link:hover,
.tool-nav-link:focus {
  color: #fff;
  border-color: rgba(255, 255, 255, .42);
  background: rgba(255, 255, 255, .1);
}

.tool-nav-link.is-active {
  color: #271d02;
  border-color: #f4c866;
  background: #f4c866;
}

.session-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: .65rem;
  width: min(100%, 44rem);
}

.session-strip--compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(100%, 28rem);
}

.session-strip--triads {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100%, 36rem);
}

.session-strip--chords {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100%, 38rem);
}

.session-strip > div {
  min-width: 0;
  padding: .75rem .85rem;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
}

.session-label {
  display: block;
  color: #b8c1cc;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.session-strip strong {
  display: block;
  overflow: hidden;
  color: #fff;
  font-size: 1.15rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.control-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 1rem 0;
  background: rgba(244, 246, 248, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: end;
  gap: .8rem;
}

.control-field {
  min-width: 0;
}

.control-field--family,
.control-field--wide,
.control-field--bar,
.control-field--position {
  grid-column: span 2;
}

.form-label {
  color: #3f4652;
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.form-select,
.btn {
  border-radius: 8px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-bg);
  box-shadow: 0 16px 40px rgba(32, 33, 36, .06);
  padding: 1rem;
}

.panel-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.panel-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0;
}

.panel-copy {
  font-size: .92rem;
}

.progression-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .55rem;
  padding-bottom: .25rem;
}

.progression-examples {
  display: grid;
  gap: .6rem;
}

.progression-example {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .45rem 1rem;
  padding: .75rem .85rem;
  border: 1px solid var(--line);
  border-radius: .7rem;
  background: #fff;
}

.progression-example-heading {
  display: flex;
  grid-column: 1 / -1;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
}

.progression-example-heading > div {
  display: flex;
  min-width: 0;
  align-items: baseline;
  gap: .45rem;
}

.progression-example-heading h3 {
  margin: 0;
  font-size: .95rem;
}

.progression-example-heading p {
  margin: 0;
  color: var(--muted);
  font-size: .82rem;
}

.progression-example-heading p::before {
  content: "·";
  margin-right: .45rem;
}

.progression-example-note {
  grid-column: 1;
  margin: 0;
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.35;
}

.progression-match {
  flex: 0 0 auto;
  padding: .2rem .45rem;
  border-radius: 999px;
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--panel-bg);
}

.progression-match-exact {
  color: #116149;
  background: #dff7ec;
}

.progression-match-section {
  color: #76520a;
  background: #fff0c7;
}

.progression-example-details {
  display: flex;
  grid-column: 1;
  flex-wrap: wrap;
  gap: .3rem 1rem;
  margin: 0;
}

.progression-example-details div {
  display: flex;
  min-width: 0;
  align-items: baseline;
  gap: .3rem;
}

.progression-example-details dt {
  color: var(--muted);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.progression-example-details dd {
  margin: 0;
  font-size: .8rem;
  overflow-wrap: anywhere;
}

.progression-example .progression-example-links {
  grid-column: 2;
  grid-row: 2 / span 2;
  align-self: end;
  margin: 0;
}

@media (max-width: 575.98px) {
  .progression-example {
    grid-template-columns: 1fr;
  }

  .progression-example-heading {
    align-items: flex-start;
  }

  .progression-example-heading > div {
    display: block;
  }

  .progression-example-heading p::before {
    content: none;
  }

  .progression-match {
    margin: 0;
  }

  .progression-example-details {
    grid-column: 1;
    gap: .25rem .7rem;
  }

  .progression-example-note {
    grid-column: 1;
  }

  .progression-example .progression-example-links {
    grid-column: 1;
    grid-row: auto;
    justify-content: flex-start;
  }
}

.progression-bar {
  display: grid;
  position: relative;
  min-height: 4.9rem;
  width: 100%;
  padding: .75rem 3.1rem .75rem .75rem;
  overflow: visible;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}

.progression-bar:hover,
.progression-bar:focus,
.progression-bar:focus-visible {
  z-index: 4;
  border-color: #8994a3;
  box-shadow: 0 8px 20px rgba(32, 33, 36, .1);
  transform: translateY(-1px);
}

.progression-bar.is-active {
  border-color: var(--target);
  background: #fff8e7;
  box-shadow: inset 0 0 0 2px rgba(196, 138, 18, .25);
}

.bar-number {
  color: var(--muted);
  font-size: .74rem;
  font-weight: 800;
}

.bar-roman {
  align-self: end;
  font-size: .86rem;
  font-weight: 800;
}

.bar-chord {
  align-self: end;
  font-size: 1.3rem;
  font-weight: 850;
}

.chord-tab {
  position: absolute;
  right: .65rem;
  bottom: .55rem;
  display: inline-flex;
  align-self: end;
  z-index: 2;
}

.chord-tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  min-height: 1.25rem;
  padding: .15rem .35rem;
  border: 1px solid #d9e0ea;
  border-radius: 4px;
  background: #f6f8fb;
  color: var(--muted);
  font-size: .64rem;
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
}

.chord-tab-popover {
  position: absolute;
  right: 0;
  bottom: calc(100% + .45rem);
  display: grid;
  gap: .1rem;
  min-width: 6.25rem;
  padding: .55rem .65rem;
  pointer-events: none;
  border: 1px solid #cfd7e3;
  border-radius: 6px;
  background: #fff;
  color: #202124;
  box-shadow: 0 14px 30px rgba(32, 33, 36, .18);
  opacity: 0;
  transform: translateY(.25rem);
  visibility: hidden;
  transition: opacity .12s ease, transform .12s ease, visibility .12s ease;
}

.chord-tab-popover::after {
  position: absolute;
  right: .65rem;
  bottom: -.36rem;
  width: .65rem;
  height: .65rem;
  content: "";
  border-right: 1px solid #cfd7e3;
  border-bottom: 1px solid #cfd7e3;
  background: #fff;
  transform: rotate(45deg);
}

.progression-bar:hover .chord-tab-popover,
.progression-bar:focus .chord-tab-popover,
.progression-bar:focus-visible .chord-tab-popover {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.tab-standard-line {
  display: flex;
  align-items: center;
  white-space: nowrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .78rem;
  font-weight: 800;
  line-height: 1.1;
}

.tab-standard-string {
  min-width: 1.1rem;
  color: var(--muted);
}

.tab-standard-staff {
  color: #202124;
}

.fretboard-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #fdfdfd, #f7f9fb);
}

.fretboard {
  --fret-columns: 13;
  --open-column-width: 2.65rem;
  --fret-min-width: 58rem;
  display: grid;
  grid-template-columns: 3.4rem repeat(var(--fret-columns), minmax(4.3rem, 1fr));
  min-width: var(--fret-min-width);
}

.fretboard.has-open-strings {
  grid-template-columns: 3.4rem var(--open-column-width) repeat(var(--fret-columns), minmax(4.3rem, 1fr));
}

.fret-label,
.string-label,
.fret-cell {
  min-width: 0;
}

.fret-label {
  display: grid;
  place-items: center;
  min-height: 2.1rem;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 800;
  border-bottom: 1px solid var(--line);
}

.fret-label-open {
  border-right: 0;
}

.string-label {
  display: grid;
  place-items: center;
  min-height: 3.6rem;
  color: #3d4550;
  font-weight: 800;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid #e2e7ed;
  background: #fff;
}

.fret-cell {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 3.6rem;
  border-left: 2px solid var(--fret);
  border-bottom: 1px solid #e2e7ed;
}

.fret-cell[role="button"] {
  cursor: pointer;
}

.fret-cell[role="button"]:focus-visible {
  outline: 3px solid #f4c866;
  outline-offset: -3px;
}

.fret-cell.is-playing {
  background: #fff4c7;
}

.fret-cell.is-playing .note-marker {
  transform: scale(1.1);
  box-shadow: 0 0 0 .2rem rgba(196, 138, 18, .3), 0 8px 18px rgba(23, 25, 28, .18);
}

.fret-cell.is-open-string {
  border-left-width: 0;
  border-right: 0;
  background: #fff;
}

.fret-cell.is-nut-adjacent {
  border-left-width: 4px;
  border-left-color: #58606b;
}

.fret-cell.is-unavailable {
  border-left-color: transparent;
  background: #f2f4f7;
}

.fret-cell.is-unavailable::before {
  content: none;
}

.fret-cell::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--string);
  transform: translateY(-50%);
}

.fret-cell.is-open-string .note-marker {
  justify-self: end;
  width: 2.35rem;
  height: 2.35rem;
  margin-right: .22rem;
}

.fret-cell.has-marker::after {
  content: "";
  position: absolute;
  bottom: .25rem;
  width: .42rem;
  height: .42rem;
  border-radius: 50%;
  background: #d6dce5;
}

.fret-cell.fret-marker-12::after {
  box-shadow: 0 -.78rem 0 #d6dce5;
}

.note-marker {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.55rem;
  height: 2.55rem;
  border: 2px solid rgba(255, 255, 255, .76);
  border-radius: 999px;
  color: #fff;
  font-size: .76rem;
  font-weight: 850;
  line-height: 1;
  box-shadow: 0 8px 18px rgba(23, 25, 28, .18);
}

.note-marker.major {
  background: var(--major);
}

.note-marker.scale-major {
  background: var(--scale-major);
}

.note-marker.scale-note {
  background: var(--scale-color, var(--scale-major));
}

.note-marker.natural-minor {
  background: var(--natural-minor);
}

.note-marker.harmonic-minor {
  background: var(--harmonic-minor);
}

.note-marker.melodic-minor {
  background: var(--melodic-minor);
}

.note-marker.minor {
  background: var(--minor);
}

.note-marker.blend {
  background: var(--blend);
}

.note-marker.arpeggio {
  background: var(--arpeggio);
}

.note-marker.triad {
  background: var(--triad);
}

.note-marker.guide {
  background: var(--guide);
}

.note-marker.target {
  background: var(--target);
  color: #1f1600;
}

.note-marker.vocabulary {
  background: var(--vocabulary);
}

.note-marker.root-fifth {
  background: #475569;
}

.note-marker.root {
  outline: 3px solid rgba(23, 25, 28, .18);
}

.layer-grid,
.vocabulary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
}

.layer-button {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: .5rem;
  min-height: 2.75rem;
  white-space: normal;
}

.progression-layer-grid {
  gap: .4rem;
}

.progression-layer-grid .layer-button {
  min-height: 2.2rem;
  padding: .35rem .5rem;
  gap: .4rem;
  font-size: .78rem;
}

.progression-layer-grid .layer-dot {
  width: .65rem;
  height: .65rem;
}

.layer-dot {
  flex: 0 0 auto;
  width: .78rem;
  height: .78rem;
  border-radius: 50%;
}

.layer-dot.major {
  background: var(--major);
}

.layer-dot.scale-major {
  background: var(--scale-major);
}

.layer-dot.scale-note {
  background: var(--scale-color, var(--scale-major));
}

.layer-dot.natural-minor {
  background: var(--natural-minor);
}

.layer-dot.harmonic-minor {
  background: var(--harmonic-minor);
}

.layer-dot.melodic-minor {
  background: var(--melodic-minor);
}

.layer-dot.minor {
  background: var(--minor);
}

.layer-dot.arpeggio {
  background: var(--arpeggio);
}

.layer-dot.triad {
  background: var(--triad);
}

.layer-dot.guide {
  background: var(--guide);
}

.layer-dot.target {
  background: var(--target);
}

.layer-dot.root-fifth {
  background: #475569;
}

.layer-dot.vocabulary {
  background: var(--vocabulary);
}

.scale-layer-group-title {
  grid-column: 1 / -1;
  margin-top: .35rem;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 850;
  text-transform: uppercase;
}

.scale-layer-group-title:first-child {
  margin-top: 0;
}

.vocabulary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.triad-trainer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .75rem;
}

.triad-trainer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.triad-shape-navigation {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .75rem;
  padding: .65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--app-bg);
}

.triad-shape-navigation[hidden] {
  display: none;
}

.triad-shape-nav-button {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  font-size: 1.6rem;
  line-height: 1;
}

.triad-shape-navigation.is-single .triad-shape-nav-button {
  visibility: hidden;
}

.triad-shape-navigation-copy {
  min-width: 0;
  text-align: center;
}

.triad-shape-navigation-copy span,
.triad-shape-navigation-copy small {
  display: block;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 800;
  text-transform: uppercase;
}

.triad-shape-navigation-copy strong {
  display: block;
  margin: .1rem 0;
  font-size: .9rem;
}

.triad-playback-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--app-bg);
}

.triad-playback-copy {
  min-width: 0;
}

.triad-playback-copy > span,
.triad-playback-controls label {
  display: block;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 850;
  text-transform: uppercase;
}

.triad-playback-copy strong {
  display: block;
  margin-top: .15rem;
  font-size: .92rem;
}

.triad-playback-controls {
  display: grid;
  grid-template-columns: 4.5rem auto;
  align-items: end;
  gap: .5rem;
  flex: 0 0 auto;
}

.triad-playback-controls label {
  grid-column: 1;
}

.triad-playback-controls input {
  grid-column: 1;
  width: 4.5rem;
  padding: .45rem .5rem;
  border: 1px solid #8c96a5;
  border-radius: 8px;
  font-size: .8rem;
}

.triad-playback-controls .playback-button {
  grid-column: 2;
  grid-row: 1 / span 2;
  min-height: 2.45rem;
}

.note-marker.triad:empty::after {
  content: "";
  width: .42rem;
  height: .42rem;
  border-radius: 999px;
  background: currentColor;
}

.vocabulary-grid .layer-button {
  position: relative;
}

.vocabulary-grid .layer-button.is-suggested {
  border-color: #b98a24;
  background: #fff8e7;
  color: #231a05;
}

.suggestion-badge {
  margin-left: auto;
  padding: .1rem .35rem;
  border-radius: 999px;
  background: #f4c866;
  color: #231a05;
  font-size: .65rem;
  font-weight: 850;
  text-transform: uppercase;
}

.current-chord {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.current-chord strong {
  display: block;
  margin-top: .3rem;
  font-size: 2.6rem;
  line-height: 1;
  overflow-wrap: anywhere;
}

.playback-button[aria-pressed="true"] {
  background: var(--header);
  border-color: var(--header);
  color: #fff;
}

.playback-button {
  white-space: nowrap;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease, box-shadow .15s ease;
}

.playback-button:hover:not(:disabled),
.playback-button:focus-visible:not(:disabled) {
  box-shadow: 0 0 0 .16rem rgba(32, 33, 36, .16);
}

.playback-button:disabled {
  cursor: not-allowed;
}

.roman-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.8rem;
  padding: .2rem .55rem;
  border-radius: 999px;
  color: #281d03;
  background: #ffe3a1;
  font-weight: 850;
}

.detail-list {
  display: grid;
  gap: .8rem;
}

.detail-list > div {
  display: grid;
  gap: .25rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid #e5e9ef;
}

.detail-list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.detail-list > .scale-family-heading {
  margin-top: .7rem;
  padding: .55rem .75rem;
  border: 0;
  border-radius: 6px;
  background: #e9eef5;
  color: #283444;
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.detail-list > .scale-family-heading:first-child {
  margin-top: 0;
}

.detail-list > .scale-palette-row {
  gap: .45rem;
  margin: 0 .35rem;
  padding: .15rem .4rem .85rem .75rem;
  border-bottom: 1px solid #dfe5ec;
  border-left: 3px solid #c8d1dc;
}

.detail-list > .scale-palette-row:last-child {
  padding-bottom: .15rem;
  border-bottom: 0;
}

.scale-palette-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
}

.scale-palette-meta {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: .18rem;
}

.scale-description {
  display: flex;
  align-items: baseline;
  gap: .3rem;
  flex-wrap: wrap;
}

.scale-quality {
  color: var(--ink);
  font-size: .73rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.35;
  text-transform: none;
}

.scale-quality::after {
  content: " —";
  color: var(--muted);
  font-weight: 600;
}

.scale-character,
.scale-usage {
  color: var(--muted);
  font-size: .73rem;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.35;
  text-transform: none;
}

.scale-usage {
  font-weight: 600;
}

.scale-listening {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-top: .3rem;
  padding-top: .6rem;
  border-top: 1px solid #dfe5ec;
}

.scale-listening-label {
  color: var(--muted);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.scale-listening-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem 0;
}

.scale-listening-grid .scale-listening-item:only-child {
  grid-column: 1 / -1;
  padding-right: 0;
}

.scale-listening-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .3rem .85rem;
  padding: .05rem 1rem .05rem 0;
}

.scale-listening-item:nth-child(even) {
  padding-right: 0;
  padding-left: 1rem;
  border-left: 1px solid #dfe5ec;
}

.scale-listening-item:nth-child(n + 3) {
  padding-top: .7rem;
  border-top: 1px solid #dfe5ec;
}

.scale-listening-heading {
  display: flex;
  align-items: baseline;
  gap: .25rem .4rem;
  flex-wrap: wrap;
  min-width: 0;
}

.detail-list .scale-listening-title {
  color: var(--ink);
  font-size: .82rem;
  font-weight: 850;
  line-height: 1.3;
}

.detail-list .scale-listening-artist {
  color: var(--muted);
  font-size: .73rem;
  font-weight: 650;
  text-transform: none;
}

.detail-list .scale-listening-artist::before {
  content: "— ";
}

.detail-list .scale-listening-key {
  flex-basis: 100%;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 650;
  line-height: 1.3;
}

.scale-listening-focus {
  grid-column: 1;
  margin: 0;
  color: var(--muted);
  font-size: .72rem;
  line-height: 1.4;
}

.detail-list .scale-listening-focus-label {
  color: var(--ink);
  font-size: inherit;
  font-weight: 800;
  text-transform: none;
}

.scale-listening-links {
  display: flex;
  grid-column: 2;
  grid-row: 1 / span 2;
  align-items: center;
  flex: 0 0 auto;
  gap: .35rem;
}

.scale-listening-links a {
  display: inline-flex;
  min-height: 31px;
  align-items: center;
  justify-content: center;
  padding: .3rem .55rem;
  border: 1px solid #d9dee5;
  border-radius: .45rem;
  background: #fff;
  color: #53606f;
  font-size: .73rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  text-transform: none;
}

.scale-listening-links .is-youtube {
  color: #b72b2b;
}

.scale-listening-links .is-spotify {
  color: #19743a;
}

.scale-listening-links a:hover,
.scale-listening-links a:focus {
  background: #f4f6f8;
  border-color: #bcc5cf;
}

@media (max-width: 575.98px) {
  .scale-listening-grid {
    grid-template-columns: 1fr;
  }

  .scale-listening-item {
    grid-template-columns: 1fr;
    padding: .05rem 0;
    border: 0;
  }

  .scale-listening-item:nth-child(even),
  .scale-listening-item:nth-child(n + 3) {
    padding: .7rem 0 0;
    border-top: 1px solid #dfe5ec;
    border-left: 0;
  }

  .scale-listening-links {
    grid-column: 1;
    grid-row: auto;
    justify-content: flex-start;
  }
}

.detail-list .scale-palette-header > span {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: none;
}

.playback-controls {
  display: flex;
  align-items: center;
  gap: .45rem;
  flex-wrap: wrap;
}

.playback-controls label {
  color: var(--muted);
  font-size: .75rem;
  font-weight: 800;
}

.playback-controls input {
  width: 4.5rem;
  padding: .28rem .4rem;
  border: 1px solid #8c96a5;
  border-radius: 6px;
  font-size: .8rem;
}

.playback-controls input:focus-visible,
.playback-button:focus-visible {
  outline: 3px solid #f4c866;
  outline-offset: 2px;
}

.playback-status {
  position: fixed;
  z-index: 1080;
  top: 1rem;
  right: 1rem;
  max-width: min(24rem, calc(100vw - 2rem));
  margin: 0;
  padding: .7rem .9rem;
  border: 1px solid var(--line);
  border-radius: .55rem;
  color: var(--ink);
  background: var(--panel-bg);
  box-shadow: 0 .75rem 2rem rgba(23, 25, 28, .16);
  font-size: .82rem;
  font-weight: 700;
  line-height: 1.4;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-.5rem);
  transition: opacity .16s ease, transform .16s ease;
}

.playback-status.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.playback-status.is-error {
  border-color: var(--minor);
}

.playback-status:empty {
  display: none;
}

.detail-list span {
  color: var(--muted);
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.detail-list strong {
  color: var(--ink);
  font-size: .98rem;
  line-height: 1.45;
}

.detail-list .tone-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .38rem .55rem;
  line-height: 1.2;
}

.detail-list .tone-pair {
  display: inline-flex;
  align-items: center;
  gap: .22rem;
  color: var(--ink);
  font-size: .98rem;
  font-weight: 850;
  text-transform: none;
}

.detail-list .tone-note {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 900;
  text-transform: none;
}

.detail-list .tone-role {
  display: inline-grid;
  place-items: center;
  min-width: 1.38rem;
  min-height: 1.18rem;
  padding: 0 .28rem;
  border: 1px solid #cfd7e3;
  border-radius: 4px;
  background: #f6f8fb;
  color: #4a5564;
  font-size: .68rem;
  font-weight: 900;
  line-height: 1;
  text-transform: none;
}

.detail-list-compact {
  gap: .55rem;
}

.detail-list-compact > div {
  padding-bottom: 0;
  border-bottom: 0;
}

.empty-state {
  padding: 1rem;
  border: 1px dashed #cfd7e3;
  border-radius: 8px;
  color: var(--muted);
  background: #f8fafc;
  font-weight: 700;
}

.chord-inversion-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1rem;
}

.chord-inversion-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: .55rem;
  min-height: 2.35rem;
  padding: .35rem .65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: .78rem;
  font-weight: 850;
}

.chord-inversion-button:hover,
.chord-inversion-button:focus {
  border-color: #8c96a5;
  background: #f7f9fb;
}

.chord-inversion-button.is-active {
  border-color: var(--header);
  background: var(--header);
  color: #fff;
}

.chord-inversion-button strong {
  display: inline-grid;
  place-items: center;
  min-width: 1.65rem;
  min-height: 1.35rem;
  padding: 0 .35rem;
  border-radius: 999px;
  background: #e9eef5;
  color: #29313d;
  font-size: .72rem;
}

.chord-inversion-button.is-active strong {
  background: #f4c866;
  color: #271d02;
}

.chord-library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 21rem), 1fr));
  gap: .85rem;
  align-items: start;
}

.chord-card {
  min-width: 0;
  padding: .8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(32, 33, 36, .05);
}

.chord-card.is-selected {
  border-color: var(--header);
  box-shadow: 0 0 0 2px rgba(35, 63, 92, .16), 0 10px 24px rgba(32, 33, 36, .08);
}

.chord-card[role="button"] {
  cursor: pointer;
}

.chord-card[role="button"]:focus-visible {
  outline: 3px solid #f4c866;
  outline-offset: 2px;
}

.chord-card-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: .65rem;
}

.chord-card-heading strong,
.chord-card-heading span {
  display: block;
}

.chord-card-heading strong {
  font-size: 1.05rem;
  font-weight: 900;
  line-height: 1.1;
}

.chord-card-heading span {
  margin-top: .2rem;
  color: var(--muted);
  font-size: .74rem;
  font-weight: 800;
}

.shape-badge {
  flex: 0 0 auto;
  padding: .2rem .45rem;
  border-radius: 4px;
  background: #edf2f7;
  color: #29313d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .72rem;
  font-weight: 850;
  white-space: nowrap;
}

.chord-diagram {
  --fret-count: 4;
  --string-label-width: 1.45rem;
  --status-width: 1.8rem;
  display: grid;
  gap: .25rem;
  margin: .85rem 0 .75rem;
  overflow-x: auto;
  padding-bottom: .15rem;
}

.chord-diagram-header,
.chord-diagram-row {
  display: grid;
  grid-template-columns: var(--string-label-width) var(--status-width) repeat(var(--fret-count), minmax(2.25rem, 1fr));
  gap: 0;
  min-width: min-content;
  align-items: center;
}

.chord-diagram-header span {
  display: grid;
  place-items: center;
  min-height: 1.1rem;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 900;
  line-height: 1;
}

.chord-diagram-rows {
  display: grid;
  border-radius: 4px;
}

.diagram-string-label {
  display: grid;
  place-items: center;
  min-height: 1.9rem;
  color: #222831;
  font-size: .72rem;
  font-weight: 850;
}

.diagram-status-cell,
.diagram-cell {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 1.9rem;
}

.diagram-status-cell {
  background: #fff;
}

.diagram-cell {
  position: relative;
  overflow: hidden;
  border-left: 2px solid #927f68;
  background: #303030;
}

.diagram-cell.is-nut-adjacent {
  border-left-width: .48rem;
  border-left-color: #101113;
}

.diagram-cell.is-unavailable {
  border-left-color: transparent;
  background: #f2f4f7;
}

.diagram-status-cell::before,
.diagram-cell::before {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  content: "";
  background: var(--string);
  transform: translateY(-50%);
}

.diagram-cell.is-unavailable::before {
  content: none;
}

.diagram-cell.has-marker::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: .42rem;
  height: .42rem;
  content: "";
  border-radius: 999px;
  background: rgba(255, 255, 255, .8);
  transform: translate(-50%, -50%);
}

.diagram-dot {
  z-index: 1;
  display: grid;
  place-items: center;
  width: 1.48rem;
  height: 1.48rem;
  border: 1px solid rgba(255, 255, 255, .82);
  border-radius: 999px;
  background: var(--arpeggio);
  color: #fff;
  font-size: .62rem;
  font-weight: 900;
  line-height: 1;
  box-shadow: 0 6px 12px rgba(23, 25, 28, .16);
}

.diagram-dot.root {
  background: var(--target);
  color: #1f1600;
}

.diagram-mute {
  position: relative;
  z-index: 1;
  color: #b91c1c;
  font-size: 1.15rem;
  font-weight: 950;
  line-height: 1;
  text-transform: uppercase;
}

.chord-card-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .45rem;
  padding-top: .7rem;
  border-top: 1px solid #e5e9ef;
}

.chord-card-meta div {
  min-width: 0;
}

.chord-card-meta span {
  display: block;
  color: var(--muted);
  font-size: .66rem;
  font-weight: 850;
  text-transform: uppercase;
}

.chord-card-meta strong {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-size: .82rem;
  font-weight: 850;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.metronome-panel {
  width: min(100%, 48rem);
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.metronome-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: .65rem;
  margin: 1rem 0;
}

.metronome-display output {
  font-size: clamp(4.5rem, 15vw, 8rem);
  font-weight: 850;
  letter-spacing: -.06em;
  line-height: 1;
}

.metronome-display span {
  color: var(--muted);
  font-size: .85rem;
  font-weight: 850;
  text-transform: uppercase;
}

.beat-indicators {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  gap: .75rem;
  margin: 1.5rem 0 2rem;
}

.beat-indicator {
  width: 1rem;
  height: 1rem;
  border: 2px solid #aab3bf;
  border-radius: 999px;
  background: #fff;
  transition: background .06s ease, border-color .06s ease, transform .06s ease;
}

.beat-indicator.is-accent {
  width: 1.25rem;
  height: 1.25rem;
  border-color: var(--target);
}

.beat-indicator.is-active {
  border-color: var(--ink);
  background: var(--ink);
  transform: scale(1.35);
}

.beat-indicator.is-accent.is-active {
  border-color: var(--target);
  background: var(--target);
}

.metronome-controls {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
}

.tempo-step {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  font-size: 1.5rem;
  line-height: 1;
}

.metronome-settings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
  gap: 1rem;
  margin-top: 2rem;
}

.metronome-accent-field {
  padding-bottom: .45rem;
}

.metronome-accent-field .form-label {
  display: block;
}

.metronome-actions {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: .75rem;
  margin-top: 2rem;
}

.metronome-actions .btn {
  min-height: 3.25rem;
  font-weight: 800;
}

@media (min-width: 768px) {
  .controls-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .control-field--family,
  .control-field--wide,
  .control-field--bar,
  .control-field--position {
    grid-column: span 2;
  }
}

@media (min-width: 1200px) {
  .controls-grid {
    grid-template-columns:
      minmax(5rem, .7fr)
      minmax(7rem, .9fr)
      minmax(4.25rem, .5fr)
      minmax(7.5rem, 1fr)
      minmax(11rem, 1.7fr)
      minmax(8.5rem, 1.25fr)
      minmax(5.5rem, .65fr)
      minmax(5.75rem, .65fr)
      minmax(7.5rem, .9fr);
    gap: .75rem;
  }

  .control-field--family,
  .control-field--wide,
  .control-field--bar,
  .control-field--position {
    grid-column: auto;
  }

  body[data-tool="chords"] .controls-grid {
    grid-template-columns:
      minmax(5.75rem, .75fr)
      minmax(7.5rem, .9fr)
      minmax(4.25rem, .5fr)
      minmax(9rem, 1.2fr)
      minmax(8.5rem, 1fr)
      minmax(6rem, .65fr)
      minmax(8.75rem, 1fr);
  }

  html[lang="it"] body[data-tool="triads"] .controls-grid {
    grid-template-columns:
      minmax(5.5rem, .7fr)
      minmax(7rem, .9fr)
      minmax(7.5rem, .75fr)
      minmax(7rem, .8fr)
      minmax(8rem, 1fr)
      minmax(8.5rem, 1fr)
      minmax(5.5rem, .65fr)
      minmax(7.5rem, .9fr);
  }

  html[lang="it"] body[data-tool="chords"] .controls-grid {
    grid-template-columns:
      minmax(5.75rem, .75fr)
      minmax(7.5rem, .9fr)
      minmax(7.5rem, .75fr)
      minmax(9rem, 1.2fr)
      minmax(8.5rem, 1fr)
      minmax(6rem, .65fr)
      minmax(8.75rem, 1fr);
  }
}

@media (max-width: 767.98px) {
  .app-header {
    padding: 1.35rem 0;
  }

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

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

  .panel {
    padding: .85rem;
  }

  .layer-grid,
  .vocabulary-grid {
    grid-template-columns: 1fr;
  }

  .metronome-settings {
    grid-template-columns: 1fr;
  }

  .metronome-actions {
    grid-template-columns: 1fr;
  }

  .repertoire-filters {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 575.98px) {
  .triad-playback-box {
    align-items: stretch;
    flex-direction: column;
  }

  .triad-playback-controls {
    grid-template-columns: 4.5rem minmax(0, 1fr);
  }

  .playback-controls {
    align-items: stretch;
    gap: .5rem;
  }

  .playback-controls label {
    align-self: center;
  }

  .playback-controls .playback-button {
    flex: 1 1 auto;
  }

}

@media (min-width: 1500px) {
  .progression-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}