.progression-main {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 4.5rem 0 5rem;
}

.progression-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(17rem, 0.55fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
  padding: 3.5rem 0 3rem;
}

.progression-hero h1 {
  max-width: 12ch;
  margin: 0.35rem 0 1rem;
  font-size: clamp(3rem, 8vw, 6.5rem);
  line-height: 0.9;
  letter-spacing: -0.065em;
}

.progression-hero > div > p:last-of-type {
  max-width: 42rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.progression-hero-note {
  padding: 1.4rem;
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, rgba(73, 188, 194, 0.14), rgba(13, 18, 24, 0.82));
  box-shadow: 0 18px 50px var(--shadow);
}

.progression-hero-note strong {
  display: block;
  margin: 0.55rem 0;
  font-size: 1.3rem;
}

.progression-hero-note p,
.progression-shell-header p {
  margin: 0;
  color: var(--muted);
}

.progression-privacy {
  margin-bottom: 1.5rem;
}

.progression-shell {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(16, 23, 30, 0.96), rgba(7, 11, 15, 0.96));
  box-shadow: 0 32px 90px var(--shadow);
}

.progression-shell-header,
.progression-editor > header,
.progression-guidance > header {
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: flex-start;
}

.progression-shell-header {
  padding: clamp(1.35rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.progression-related-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
}

.progression-shell-header h2,
.progression-editor h3,
.progression-guidance h3 {
  margin: 0.35rem 0 0.45rem;
}

.progression-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border-bottom: 1px solid var(--line);
  background: var(--line);
}

.progression-field {
  min-width: 0;
  margin: 0;
  padding: 1rem;
  border: 0;
  background: rgba(8, 13, 18, 0.96);
}

.progression-field > span,
.progression-field legend {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.progression-field select,
.progression-field input[type="range"],
.progression-bars select {
  width: 100%;
}

.progression-field select,
.progression-bars select {
  min-height: 2.75rem;
  padding: 0.62rem 0.7rem;
  border: 1px solid var(--control-border);
  border-radius: 0;
  color: var(--text);
  background: #0b1117;
}

.progression-field output {
  display: block;
  margin-top: 0.4rem;
  color: var(--accent-strong);
  font-variant-numeric: tabular-nums;
}

.progression-focus-field {
  display: grid;
  gap: 0.7rem;
  align-content: center;
}

.progression-focus-toggle {
  min-height: var(--tap-target);
  display: flex;
  gap: 0.65rem;
  align-items: center;
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 800;
  cursor: pointer;
}

.progression-focus-toggle input {
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--accent-strong);
}

.progression-focus-range {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 5.5rem;
  gap: 0.75rem;
  align-items: center;
}

.progression-focus-range output {
  margin-top: 0;
  text-align: right;
}

.progression-focus-range.is-disabled {
  opacity: 0.42;
}
.progression-instrument-field {
  grid-column: span 2;
}

.progression-segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.progression-segmented label {
  position: relative;
}

.progression-segmented input {
  position: absolute;
  opacity: 0;
}

.progression-segmented span {
  min-height: var(--tap-target);
  display: grid;
  place-items: center;
  padding: 0.62rem 0.75rem;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  cursor: pointer;
}

.progression-segmented input:checked + span {
  border-color: var(--accent-strong);
  color: #041012;
  background: var(--accent-strong);
}

.progression-segmented input:focus-visible + span {
  outline: 3px solid var(--text);
  outline-offset: 2px;
}

.progression-check-field {
  min-height: var(--tap-target);
  display: flex;
  gap: 0.65rem;
  align-items: center;
}

.progression-check-field > span {
  margin: 0;
}

.progression-editor,
.progression-guidance {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.progression-bars {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1.2rem;
}

.progression-bars label {
  min-width: 0;
  padding: 0.65rem;
  border: 1px solid var(--line);
  background: rgba(73, 188, 194, 0.045);
}

.progression-bars label.is-current {
  border-color: var(--accent-strong);
  background: rgba(73, 188, 194, 0.16);
  box-shadow: inset 0 3px 0 var(--accent-strong);
}

.progression-bars label > span {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--subtle);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.progression-transport {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: rgba(73, 188, 194, 0.06);
}

.transport-actions,
.layer-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.transport-meter {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.layer-controls {
  margin: 0;
  padding: 0;
  border: 0;
}

.layer-controls legend {
  margin-right: 0.35rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.layer-controls label {
  min-height: var(--tap-target);
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.progression-status,
.color-note-help {
  margin: 0;
  padding: 0.8rem clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  color: var(--accent-strong);
}

.progression-now {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.progression-now > div {
  padding: 1rem clamp(1rem, 2vw, 1.4rem);
  border-right: 1px solid var(--line);
}

.progression-now > div:last-child {
  border-right: 0;
}

.progression-now span,
.guidance-prompt > span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--subtle);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.progression-now strong {
  font-size: clamp(1rem, 2vw, 1.25rem);
}

.guidance-stages {
  justify-content: flex-end;
}

.guidance-prompt {
  margin-top: 1rem;
  padding: 1rem;
  border-left: 4px solid var(--accent);
  background: rgba(73, 188, 194, 0.08);
}

.guidance-prompt p {
  max-width: 65rem;
  margin: 0;
  font-size: 1.05rem;
}

.progression-fretboard-scroll {
  overflow-x: auto;
  padding: 1.25rem;
  border-bottom: 1px solid var(--line);
  scrollbar-color: var(--accent) #0b1117;
}

.progression-fretboard {
  --progression-fret-count: 15;
  min-width: 63rem;
  border: 1px solid var(--line-strong);
  background: #080d12;
}

.progression-fretboard-row {
  display: grid;
  grid-template-columns: 4.2rem repeat(calc(var(--progression-fret-count) + 1), minmax(3.2rem, 1fr));
  align-items: stretch;
}

.progression-fretboard.is-left-handed .progression-fretboard-row {
  grid-template-columns: repeat(calc(var(--progression-fret-count) + 1), minmax(3.2rem, 1fr)) 4.2rem;
}

.progression-fretboard-row + .progression-fretboard-row {
  border-top: 1px solid var(--line);
}

.progression-string-label,
.progression-fret-label,
.progression-fret-cell {
  min-height: 3.2rem;
  border-right: 1px solid var(--line);
}

.progression-string-label,
.progression-fret-label {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 800;
}

.progression-fret-cell {
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.012);
}

.progression-fret-cell.is-outside-focus {
  opacity: 0.26;
}

.progression-note {
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  border: 1px solid rgba(174, 189, 195, 0.35);
  border-radius: 50%;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 850;
}

.progression-note small {
  display: none;
}

.progression-note.is-current {
  border-color: var(--accent-strong);
  color: #031012;
  background: var(--accent-strong);
  box-shadow: 0 0 0 3px rgba(127, 230, 234, 0.16);
}

.progression-note.is-current small {
  display: block;
  margin-top: -0.28rem;
  font-size: 0.47rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.progression-note.is-next {

.progression-note.is-muted {
  opacity: 0.22;
}
  outline: 2px dashed #e7c875;
  outline-offset: 3px;
}

.progression-note.is-color {
  border-color: #ff9f6e;
  color: #fff5ef;
  background: #6b2d18;
}

.progression-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.3rem;
  padding: 1rem clamp(1.25rem, 3vw, 2rem);
}

.progression-legend span {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.78rem;
}

.progression-legend i {
  width: 0.8rem;
  height: 0.8rem;
  border: 1px solid rgba(174, 189, 195, 0.5);
  border-radius: 50%;
}

.progression-legend .legend-current { background: var(--accent-strong); }
.progression-legend .legend-next { outline: 2px dashed #e7c875; outline-offset: 2px; }
.progression-legend .legend-color { border-color: #ff9f6e; background: #6b2d18; }

.color-note-help {
  border-top: 1px solid var(--line);
  color: #ffd3bd;
  background: rgba(107, 45, 24, 0.22);
}

.tool-feedback,
.progression-notes {
  margin-top: 1.5rem;
}

.progression-notes > div:first-child {
  max-width: 46rem;
  margin-bottom: 1.25rem;
}

.progression-fallback {
  padding: 2rem;
  color: var(--muted);
}

@media (max-width: 900px) {
  .progression-hero { grid-template-columns: 1fr; }
  .progression-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .progression-bars { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .progression-now { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .progression-now > div:nth-child(2) { border-right: 0; }
  .progression-now > div:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .progression-guidance > header { display: block; }
  .progression-related-actions { justify-content: flex-start; margin-top: 1rem; }
  .guidance-stages { justify-content: flex-start; margin-top: 1rem; }
}

@media (max-width: 760px) {
  .progression-main { padding-top: 0; }
  .progression-hero { padding-top: 3rem; }
}

@media (max-width: 620px) {
  .progression-main { width: min(100% - 1rem, var(--max-width)); padding-top: 0; }
  .progression-hero { padding-top: 3rem; }
  .progression-controls,
  .progression-bars,
  .progression-now { grid-template-columns: 1fr; }
  .progression-instrument-field { grid-column: auto; }
  .progression-shell-header,
  .progression-editor > header,
  .progression-transport { align-items: stretch; flex-direction: column; }
  .progression-now > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .progression-now > div:last-child { border-bottom: 0; }
  .guidance-stages { display: grid; grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .progression-bars label,
  .progression-note { transition: none; }
}

.progression-guidance-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(11rem, 14rem); gap: 1rem; align-items: start; }
@media (max-width: 700px) { .progression-guidance-body { grid-template-columns: 1fr; } .progression-play-reference { order: -1; } }