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

.ear-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;
}

.ear-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;
}

.ear-hero > div > p:last-of-type {
  max-width: 43rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.ear-hero-note {
  padding: 1.4rem;
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, rgba(73, 188, 194, 0.15), rgba(13, 18, 24, 0.82));
  box-shadow: 0 18px 50px var(--shadow);
}

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

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

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

.ear-shell {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(16, 23, 30, 0.97), rgba(7, 11, 15, 0.97));
  box-shadow: 0 32px 90px var(--shadow);
}

.ear-shell-header {
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: flex-start;
  padding: clamp(1.35rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.ear-shell-header h2 {
  margin: 0.35rem 0 0.45rem;
}

.ear-related-actions,
.ear-transport,
.ear-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.ear-related-actions {
  justify-content: flex-end;
}

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

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

.ear-field > span,
.ear-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;
}

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

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

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

.ear-instrument-field {
  grid-column: span 2;
}

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

.ear-segmented label {
  position: relative;
}

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

.ear-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;
}

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

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

.ear-segmented input:disabled + span {
  cursor: not-allowed;
  opacity: 0.48;
}

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

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

.ear-focus-toggle {
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 800;
  cursor: pointer;
}

.ear-focus-toggle input,
.ear-check-field input {
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--accent-strong);
}

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

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

.ear-focus-range.is-disabled {
  opacity: 0.42;
}

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

.ear-transport {
  padding: 1rem clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: rgba(73, 188, 194, 0.06);
}

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

.ear-round {
  border-bottom: 1px solid var(--line);
}

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

.ear-round-stats > div {
  padding: 0.9rem clamp(0.85rem, 2vw, 1.25rem);
  border-right: 1px solid var(--line);
}

.ear-round-stats > div:last-child {
  border-right: 0;
}

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

.ear-round-stats strong {
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-variant-numeric: tabular-nums;
}

.ear-prompt-card {
  min-height: 10.5rem;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  background:
    radial-gradient(circle at 92% 18%, rgba(127, 230, 234, 0.12), transparent 26%),
    rgba(4, 8, 12, 0.72);
}

.ear-prompt-card h3 {
  max-width: 28ch;
  margin: 0.45rem 0 0.6rem;
  font-size: clamp(1.65rem, 4vw, 2.7rem);
  line-height: 1.05;
}

.ear-prompt-card p {
  max-width: 50rem;
  margin: 0;
  color: var(--muted);
}

.ear-answer-feedback {
  padding: 1rem clamp(1.5rem, 4vw, 2.6rem);
  border-top: 1px solid var(--line);
  border-left: 4px solid var(--accent-strong);
  background: rgba(73, 188, 194, 0.08);
}

.ear-answer-feedback.is-wrong {
  border-left-color: #ff9f6e;
  background: rgba(107, 45, 24, 0.2);
}

.ear-answer-feedback strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 1.1rem;
}

.ear-answer-feedback p {
  margin: 0;
  color: var(--muted);
}

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

.ear-fretboard-scroll:focus-visible {
  outline: 3px solid var(--accent-strong);
  outline-offset: -3px;
}

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

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

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

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

.ear-string-label,
.ear-fret-label,
.ear-fret-cell {
  min-height: 3.35rem;
  border-right: 1px solid var(--line);
}

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

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

.ear-fret-cell.is-outside-focus {
  opacity: 0.24;
}

.ear-fret-answer {
  display: grid;
  width: 2.55rem;
  height: 2.55rem;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(174, 189, 195, 0.48);
  border-radius: 50%;
  color: var(--muted);
  background: rgba(174, 189, 195, 0.08);
  font-size: 0.68rem;
  font-weight: 900;
  cursor: pointer;
}

.ear-fret-answer::before {
  content: "";
  width: 0.52rem;
  height: 0.52rem;
  border-radius: 50%;
  background: currentColor;
}

.ear-fret-answer:hover {
  border-color: var(--accent-strong);
  color: var(--accent-strong);
}

.ear-fret-answer:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
}

.ear-fret-answer:disabled {
  cursor: not-allowed;
  opacity: 0.32;
}

.ear-fret-answer.is-correct-target:disabled,
.ear-fret-answer.is-wrong-choice:disabled {
  opacity: 1;
}

.ear-fret-answer.is-correct-target,
.ear-fret-answer.is-wrong-choice {
  width: 2.85rem;
  border-radius: 0.3rem;
  color: #051012;
}

.ear-fret-answer.is-correct-target {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.ear-fret-answer.is-wrong-choice {
  border-color: #ff9f6e;
  color: #fff7f2;
  background: #6b2d18;
}

.ear-fret-answer.is-correct-target::before,
.ear-fret-answer.is-wrong-choice::before {
  content: none;
}

.ear-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.3rem;
  padding: 1rem clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

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

.ear-legend i {
  display: grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
  border: 1px solid rgba(174, 189, 195, 0.5);
  border-radius: 50%;
  font-size: 0.45rem;
  font-style: normal;
  font-weight: 900;
}

.ear-legend .legend-correct {
  border-radius: 0.15rem;
  color: #051012;
  background: var(--accent-strong);
}

.ear-legend .legend-wrong {
  border-radius: 0.15rem;
  color: #fff7f2;
  background: #6b2d18;
}

.ear-results {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.25rem 2rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 4px solid var(--accent-strong);
  background: rgba(73, 188, 194, 0.07);
}

.ear-results[hidden] {
  display: none;
}

.ear-results h3,
.ear-results h4 {
  margin: 0.35rem 0 0;
}

.ear-result-score {
  display: grid;
  justify-items: end;
  align-content: start;
}

.ear-result-score strong {
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 0.95;
}

.ear-result-score span {
  margin-top: 0.45rem;
  color: var(--muted);
}

.ear-missed {
  grid-column: 1 / -1;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.ear-missed ul {
  display: grid;
  gap: 0.4rem;
  margin: 0.75rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.ear-result-actions {
  grid-column: 1 / -1;
}

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

.ear-notes > div:first-child {
  max-width: 47rem;
  margin-bottom: 1.25rem;
}

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

@media (max-width: 900px) {
  .ear-hero {
    grid-template-columns: 1fr;
  }

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

  .ear-shell-header {
    display: block;
  }

  .ear-related-actions {
    justify-content: flex-start;
    margin-top: 1rem;
  }
}

@media (max-width: 760px) {
  .ear-main { padding-top: 0; }
  .ear-hero { padding-top: 3rem; }
  .ear-fret-answer {
    width: var(--tap-target);
    height: var(--tap-target);
  }
}

@media (max-width: 620px) {
  .ear-main {
    width: min(100% - 1rem, var(--max-width));
    padding-top: 0;
  }

  .ear-hero {
    padding-top: 3rem;
  }

  .ear-controls,
  .ear-round-stats,
  .ear-results {
    grid-template-columns: 1fr;
  }

  .ear-instrument-field {
    grid-column: auto;
  }

  .ear-round-stats > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .ear-round-stats > div:last-child {
    border-bottom: 0;
  }

  .ear-result-score {
    justify-items: start;
  }

  .ear-missed,
  .ear-result-actions {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ear-fret-answer {
    transition: none;
  }
}