:root {
      --fretboard-page-bg: #0b0b0b;
      --fretboard-shell-bg: #101010;
      --fretboard-shell-border: rgba(255, 215, 120, 0.25);
      --fretboard-card-glow: rgba(255, 215, 120, 0.16);
      --fretboard-wood-base: #2b1f17;
      --fretboard-metal: #c7c7c7;
      --fretboard-note: #f2f2f2;
      --fretboard-root: #ffcc33;
      --fretboard-control-bg: #131313;
      --fretboard-control-border: rgba(255, 215, 120, 0.25);
    }

    html,
    body {
      max-width: 100%;
      overflow-x: clip;
    }

    .fretboard-page-intro,
    .fretboard-lab,
    .fretboard-faq {
      font-family: "Cal Sans", system-ui, sans-serif;
    }

    .fretboard-page-intro {
      padding: 0;
      background-color: #0b0b0b;
      background-image: none;
    }

    .fretboard-page-intro__inner {
      position: relative;
      width: 100%;
      max-width: none;
      margin: 0;
      padding: 1.8rem 1.6rem 1.45rem;
      border-radius: 0;
      border: none;
      background-color: #101010;
      background-image: none;
      box-shadow: none;
      overflow: hidden;
    }

    .fretboard-page-intro__inner::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url("../images/backgrounds/paisley2.webp");
      background-size: cover;
      background-repeat: no-repeat;
      background-position: center;
      opacity: 0.24;
      mix-blend-mode: normal;
      filter: brightness(0.82) contrast(1.1);
      pointer-events: none;
      z-index: 0;
    }

    .fretboard-page-intro__inner > * {
      position: relative;
      z-index: 1;
    }

    .fretboard-page-intro__inner > .fretboard-hero,
    .fretboard-page-intro__inner > .fretboard-intro-actions,
    .fretboard-page-intro__inner > .fretboard-intro-toggle,
    .fretboard-page-intro__inner > [data-intro-content] {
      width: min(1200px, 100%);
      margin-left: auto;
      margin-right: auto;
    }

    .fretboard-hero {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      gap: 1.5rem;
      align-items: center;
      justify-items: center;
      text-align: center;
    }

    .fretboard-hero__left {
      max-width: 700px;
      margin: 0 auto;
    }

    .fretboard-page-intro h1 {
      margin: 0 0 0.75rem;
      font-size: clamp(2.05rem, 3.2vw, 42px);
      line-height: 1.12;
      font-weight: 700;
      letter-spacing: 0.01em;
      color: #f6f1e7;
      text-wrap: balance;
    }

    .fretboard-intro-lead {
      margin: 0 0 1.35rem;
      max-width: 58ch;
      font-size: 14px;
      line-height: 1.95;
      color: rgba(246, 241, 231, 0.86);
      text-align: left;
    }

    .fretboard-hero-cta {
      margin-top: 1.05rem;
      min-height: 44px;
      padding: 0.58rem 1.05rem;
      border-radius: 6px;
      border: 1px solid rgba(255, 215, 120, 0.7);
      background: linear-gradient(180deg, #f7d98b 0%, #d4a942 100%);
      color: #15120b;
      font-size: 0.9rem;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      transition: transform 200ms ease, box-shadow 200ms ease, filter 200ms ease;
    }

    .fretboard-hero-cta:hover,
    .fretboard-hero-cta:focus-visible {
      color: #15120b;
      transform: translateY(-2px);
      box-shadow: 0 0 0 1px rgba(255, 215, 120, 0.8), 0 0 18px rgba(255, 215, 120, 0.28);
      filter: brightness(1.04);
    }

    .fretboard-intro-toggle {
      display: none;
      margin: 1rem 0 0.65rem;
      border-radius: 6px;
      padding: 0.42rem 0.82rem;
      font-size: 0.78rem;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .fretboard-info-grid {
      position: relative;
      margin-top: 0.35rem;
      display: grid;
      gap: 0.95rem;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      width: 100%;
      min-width: 0;
    }

    .fretboard-info-card {
      position: relative;
      min-width: 0;
      padding: 28px;
      border-radius: 6px;
      border: 1px solid rgba(255, 215, 120, 0.25);
      background: #111111;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      transition: transform 200ms ease, border-color 200ms ease;
    }

    .fretboard-info-card:hover,
    .fretboard-info-card:focus-within {
      transform: translateY(-4px);
      border-color: rgba(255, 215, 120, 0.7);
    }

    .fretboard-info-card__icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      height: 24px;
      margin-bottom: 0.6rem;
      color: #f7d98b;
      font-size: 0.95rem;
      border: 1px solid rgba(255, 215, 120, 0.32);
      border-radius: 50%;
    }

    .fretboard-info-card h3 {
      margin: 0 0 0.45rem;
      font-size: 20px;
      font-weight: 600;
      color: #f6c24a;
    }

    .fretboard-info-card p {
      margin: 0;
      color: rgba(246, 241, 231, 0.8);
      font-size: 14px;
      line-height: 1.6;
    }

    .fretboard-info-card a {
      color: #f6c24a;
      text-decoration: none;
      border-bottom: 1px solid rgba(246, 194, 74, 0.55);
    }

    .fretboard-section-divider {
      padding: 0.35rem 0.9rem 1.2rem;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
      align-items: center;
      gap: 0.65rem;
      background-color: #0b0b0b;
    }

    .fretboard-section-divider span {
      display: block;
      height: 2px;
      background:
        linear-gradient(90deg, transparent, rgba(255, 215, 120, 0.85), transparent);
    }

    .fretboard-section-divider p {
      margin: 0;
      color: rgba(246, 194, 74, 0.92);
      font-size: 0.77rem;
      letter-spacing: 0.16em;
      text-transform: uppercase;
    }

    .fretboard-lab {
      padding: 0;
      position: relative;
      overflow: hidden;
      background-color: #0b0b0b;
      background-image: none;
    }

    .fretboard-lab::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: none;
      opacity: 0;
      pointer-events: none;
    }

    .fretboard-lab::after {
      content: "";
      position: absolute;
      inset: 0;
      background: none;
      pointer-events: none;
    }

    .fretboard-shell {
      position: relative;
      z-index: 1;
      max-width: none;
      width: 100%;
      margin: 0;
      padding: 1.2rem;
      border-radius: 8px;
      background: #101010;
      border: 1px solid var(--fretboard-shell-border);
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6), 0 18px 34px rgba(0, 0, 0, 0.4);
      overflow: hidden;
    }

    .fretboard-panel,
    .fretboard-panel__controls,
    .fretboard-controls {
      min-width: 0;
      max-width: 100%;
    }

    .fretboard-shell::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: none;
      opacity: 0;
      pointer-events: none;
    }

    .fretboard-head,
    .fretboard-panel {
      position: relative;
      z-index: 1;
    }

    .fretboard-head {
      margin-bottom: 0.72rem;
    }

    .section-kicker {
      margin: 0;
      font-size: 0.72rem;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: rgba(246, 194, 74, 0.76);
    }

    .fretboard-panel {
      display: grid;
      gap: 0.8rem;
    }

    .fretboard-panel__controls,
    .fretboard-panel__display,
    .fretboard-panel__options {
      margin: 0;
      width: 100%;
      background: #101010;
      border: 1px solid var(--fretboard-shell-border);
      border-radius: 8px;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      padding: 0.82rem;
    }

    .fretboard-panel__title {
      margin: 0 0 0.62rem;
      font-size: 20px;
      font-weight: 600;
      color: #f3c96b;
      letter-spacing: 0.03em;
      text-transform: uppercase;
    }

    .fretboard-controls {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      gap: 0.75rem;
      align-items: stretch;
      overflow: visible;
    }

    .fretboard-controls > * {
      min-width: 0;
      width: 100%;
    }

    @media (min-width: 992px) and (max-width: 1250px) {
      .fretboard-controls {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    .fretboard-controls + .fretboard-controls {
      margin-top: 0;
    }

    .fretboard-mobile-toolbar {
      display: none;
    }

    .fretboard-mobile-hint {
      display: none;
    }

    .fretboard-canvas-wrap {
      margin-top: 0;
      border-radius: 6px;
      border: 1px solid rgba(255, 215, 120, 0.28);
      background: #0d0d0d;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      overflow: hidden;
    }

    .fretboard-canvas {
      width: 100%;
      padding: 0.34rem 0.46rem 0.54rem;
    }

    .fretboard-faq {
      margin: 0;
      padding: 0;
      background: #000;
    }

    .fretboard-faq + .fretboard-faq {
      margin-top: 0;
    }

    .fretboard-faq__card {
      max-width: none;
      width: 100%;
      margin: 0;
      padding: clamp(1.2rem, 2vw, 2.1rem);
      border-radius: 8px;
      border: 1px solid var(--fretboard-shell-border);
      background: #101010;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
    }

    .fretboard-faq__card h2 {
      margin: 0;
      padding: 0;
      font-size: clamp(1.45rem, 2.9vw, 2.05rem);
      color: #f6c24a;
      border: 0;
      text-wrap: balance;
    }

    .fretboard-faq__details {
      width: 100%;
    }

    .fretboard-faq__summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: flex-start;
      gap: 0.65rem;
      cursor: pointer;
      margin: 0;
      padding: 0 0 0.75rem;
      border: 0;
      position: relative;
      margin-bottom: 0.55rem;
    }

    .fretboard-faq__summary::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -0.1rem;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(246, 194, 74, 0.48), transparent);
      filter: drop-shadow(0 0 7px rgba(246, 194, 74, 0.32));
      opacity: 0.72;
      pointer-events: none;
    }

    .fretboard-faq__summary::-webkit-details-marker {
      display: none;
    }

    .fretboard-faq__summary-title {
      margin: 0;
      padding: 0;
      border: 0;
      font-size: clamp(1.45rem, 2.9vw, 2.05rem);
      color: #f6c24a;
      text-wrap: balance;
    }

    .fretboard-faq__summary-hint {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      font-size: 0.78rem;
      font-weight: 700;
      text-transform: uppercase;
      color: #12100d;
      white-space: nowrap;
      letter-spacing: 0.06em;
      border-radius: 999px;
      padding: 0.34rem 0.62rem;
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      border: 1px solid rgba(18, 16, 13, 0.45);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    }

    .fretboard-faq__summary-hint::before {
      content: "Show details";
    }

    .fretboard-faq__summary-hint::after {
      content: "?";
      transition: transform 0.2s ease;
      font-size: 0.8rem;
      line-height: 1;
    }

    .fretboard-faq__details[open] .fretboard-faq__summary-hint::before {
      content: "Hide details";
    }

    .fretboard-faq__details:not([open]) .fretboard-faq__summary-hint::after {
      transform: rotate(-90deg);
    }

    .fretboard-faq__content {
      padding-top: 0.95rem;
    }

    .fretboard-faq__details[open] .fretboard-faq__content {
      animation: faq-expand 0.36s ease both;
      transform-origin: top;
    }

    @keyframes faq-expand {
      from {
        opacity: 0;
        transform: translateY(-10px) scaleY(0.98);
      }
      to {
        opacity: 1;
        transform: translateY(0) scaleY(1);
      }
    }

    .fretboard-faq__card p {
      margin: 0 0 0.85rem;
      line-height: 1.65;
      color: rgba(247, 242, 229, 0.95);
    }

    .fretboard-faq__intro {
      max-width: 92ch;
      margin-bottom: 0.9rem;
      padding: 0.9rem 1rem;
      border-radius: 12px;
      border: 1px solid rgba(246, 194, 74, 0.22);
      background: rgba(22, 18, 11, 0.45);
    }

    .fretboard-faq__lead {
      font-size: clamp(1.05rem, 1.35vw, 1.17rem);
      color: #fff3d9;
      font-weight: 600;
    }

    .fretboard-faq__rules {
      margin: 0 0 0.85rem;
      padding: 0.95rem 1rem 0.85rem;
      border: 1px solid rgba(246, 194, 74, 0.2);
      border-left: 3px solid rgba(246, 194, 74, 0.45);
      border-radius: 12px;
      background: rgba(18, 14, 9, 0.35);
    }

    .fretboard-faq__content > .fretboard-faq__rules:nth-child(5n + 2) {
      background: linear-gradient(180deg, rgba(62, 45, 16, 0.52), rgba(31, 23, 10, 0.48));
      border-color: rgba(246, 194, 74, 0.32);
      border-left-color: rgba(246, 194, 74, 0.65);
    }

    .fretboard-faq__content > .fretboard-faq__rules:nth-child(5n + 3) {
      background: linear-gradient(180deg, rgba(16, 14, 12, 0.72), rgba(10, 9, 8, 0.66));
      border-color: rgba(255, 255, 255, 0.14);
      border-left-color: rgba(246, 194, 74, 0.45);
    }

    .fretboard-faq__content > .fretboard-faq__rules:nth-child(5n + 4) {
      background: linear-gradient(180deg, rgba(18, 31, 51, 0.5), rgba(10, 20, 36, 0.46));
      border-color: rgba(126, 175, 245, 0.28);
      border-left-color: rgba(126, 175, 245, 0.58);
    }

    .fretboard-faq__content > .fretboard-faq__rules:nth-child(5n + 5) {
      background: linear-gradient(180deg, rgba(63, 23, 23, 0.52), rgba(34, 13, 13, 0.47));
      border-color: rgba(200, 95, 95, 0.32);
      border-left-color: rgba(200, 95, 95, 0.62);
    }

    .fretboard-faq__content > .fretboard-faq__rules:nth-child(5n + 1) {
      background: linear-gradient(180deg, rgba(16, 45, 26, 0.52), rgba(10, 26, 16, 0.47));
      border-color: rgba(97, 178, 129, 0.32);
      border-left-color: rgba(97, 178, 129, 0.62);
    }

    .fretboard-faq__rules:last-of-type {
      margin-bottom: 0;
    }

    .fretboard-faq__rules > p {
      max-width: 92ch;
    }

    .fretboard-faq__rules-title {
      margin: 0 0 0.65rem;
      display: flex;
      align-items: center;
      gap: 0.55rem;
      font-weight: 600;
      font-size: 1.02rem;
      color: #f6c24a;
      line-height: 1.35;
    }

    .fretboard-faq__rules-title .fretboard-faq__step + span {
      color: #f6c24a;
    }

    .fretboard-faq__step {
      width: 1.6rem;
      height: 1.6rem;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex: 0 0 auto;
      font-size: 0.88rem;
      font-weight: 700;
      color: #15120d;
      background: #f6c24a;
      box-shadow: inset 0 0 0 1px rgba(21, 18, 13, 0.35);
    }

    .fretboard-faq__rules-title--final {
      color: #fff3d9;
    }

    .fretboard-faq__rules-list {
      margin: 0.1rem 0 0.8rem;
      padding-left: 1.2rem;
      display: grid;
      gap: 0.4rem;
      line-height: 1.58;
      color: rgba(247, 242, 229, 0.95);
    }
    .fretboard-faq__pitch-line {
      margin: 0 0 0.75rem;
      padding: 0.5rem 0.65rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.3);
      background: rgba(31, 24, 12, 0.55);
      font-family: "Cal Sans", system-ui, sans-serif;
      letter-spacing: 0.01em;
      color: #ffe9b9;
      white-space: nowrap;
      overflow-x: auto;
    }
    .fretboard-faq__interval-example {
      margin: 0.45rem 0 0.85rem;
    }

    .fretboard-faq__interval-title {
      margin: 0 0 0.45rem;
      font-weight: 600;
      color: #ffe9b9;
    }

    .fretboard-faq__topic-title {
      margin: 0.95rem 0 0.45rem;
      font-weight: 700;
      color: #f6c24a;
      letter-spacing: 0.015em;
      text-transform: uppercase;
      font-size: 0.8rem;
    }

    .fretboard-faq__characteristic-tone {
      margin: 0.15rem 0 0.55rem;
      color: #2f7be8;
      font-weight: 700;
      text-shadow: 0 0 8px rgba(47, 123, 232, 0.18);
    }

    .fretboard-faq__interval-grid {
      padding: 0.5rem 0.65rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.3);
      background: rgba(31, 24, 12, 0.55);
      overflow-x: auto;
    }

    .fretboard-faq__interval-row {
      min-width: 31rem;
      display: grid;
      grid-template-columns: 5.25rem repeat(7, minmax(2rem, 1fr));
      gap: 0.35rem;
      align-items: center;
    }

    .fretboard-faq__interval-row--triad {
      min-width: 18rem;
      grid-template-columns: 5.25rem repeat(3, minmax(2rem, 1fr));
    }

    .fretboard-faq__interval-row--chromatic {
      min-width: 52rem;
      grid-template-columns: 6.25rem repeat(12, minmax(3.35rem, 1fr));
    }

    .fretboard-faq__interval-row--chromatic .fretboard-faq__interval-cell {
      font-size: 0.88rem;
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--intervals .fretboard-faq__interval-cell,
    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--semitones .fretboard-faq__interval-cell,
    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--notes .fretboard-faq__interval-cell {
      padding: 0.18rem 0.2rem;
      border-radius: 6px;
      border: 1px solid transparent;
      line-height: 1.2;
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--intervals .fretboard-faq__interval-cell {
      border-color: rgba(54, 40, 15, 0.45);
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      color: #1b140a;
      box-shadow: inset 0 0 0 1px rgba(21, 18, 13, 0.22);
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--semitones .fretboard-faq__interval-cell {
      background: rgba(155, 189, 255, 0.12);
      border-color: rgba(155, 189, 255, 0.34);
      color: #dce9ff;
      font-size: 0.84rem;
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--notes .fretboard-faq__interval-cell {
      background: rgba(112, 214, 178, 0.12);
      border-color: rgba(112, 214, 178, 0.34);
      color: #e6fff6;
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--intervals .fretboard-faq__interval-label {
      color: rgba(255, 233, 185, 0.95);
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--semitones .fretboard-faq__interval-label {
      color: rgba(220, 233, 255, 0.92);
    }

    .fretboard-faq__interval-row--chromatic.fretboard-faq__interval-row--notes .fretboard-faq__interval-label {
      color: rgba(230, 255, 246, 0.92);
    }

    .fretboard-faq__interval-row--intervals:not(.fretboard-faq__interval-row--chromatic) .fretboard-faq__interval-cell {
      padding: 0.18rem 0.2rem;
      border-radius: 6px;
      border: 1px solid rgba(54, 40, 15, 0.45);
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      color: #1b140a;
      box-shadow: inset 0 0 0 1px rgba(21, 18, 13, 0.22);
      line-height: 1.2;
    }

    .fretboard-faq__interval-row--intervals:not(.fretboard-faq__interval-row--chromatic) .fretboard-faq__interval-label {
      color: rgba(255, 233, 185, 0.95);
    }

    .fretboard-faq__interval-row--intervals .fretboard-faq__interval-cell.fretboard-faq__interval-cell--characteristic {
      border-color: rgba(21, 52, 102, 0.6);
      background: linear-gradient(180deg, #3b8af7 0%, #2f7be8 100%);
      color: #ecf4ff;
      box-shadow: inset 0 0 0 1px rgba(217, 232, 255, 0.2);
    }

    .fretboard-faq__interval-row + .fretboard-faq__interval-row {
      margin-top: 0.35rem;
      padding-top: 0.35rem;
      border-top: 1px solid rgba(246, 194, 74, 0.18);
    }

    .fretboard-faq__interval-label {
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: rgba(255, 233, 185, 0.82);
      font-weight: 700;
    }

    .fretboard-faq__interval-cell {
      font-family: "Cal Sans", system-ui, sans-serif;
      font-size: 0.98rem;
      text-align: center;
      color: #ffe9b9;
      white-space: nowrap;
    }

    .fretboard-faq__interval-row--intervals .fretboard-faq__interval-cell {
      color: #fff3d9;
    }

    .fretboard-faq__interval-cell.is-target {
      color: #1b140a;
      border: 1px solid rgba(54, 40, 15, 0.45);
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      border-radius: 6px;
      padding: 0.18rem 0.2rem;
      box-shadow: inset 0 0 0 1px rgba(21, 18, 13, 0.22);
      font-weight: 700;
      line-height: 1.2;
    }

    .fretboard-faq__interval-grid + p {
      margin-top: 0.7rem;
    }

    .fretboard-faq__triad-grid {
      margin: 0.2rem 0 0.85rem;
      display: grid;
      gap: 0.55rem;
      grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    }

    .fretboard-faq__triad-card {
      padding: 0.55rem 0.65rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.24);
      background: rgba(31, 24, 12, 0.42);
    }

    .fretboard-faq__triad-name {
      margin: 0 0 0.35rem;
      font-weight: 600;
      color: #ffe9b9;
    }

    .fretboard-faq__triad-card .fretboard-faq__pitch-line {
      margin: 0;
    }

    .fretboard-faq__interval-grid--formula {
      margin-top: 0.15rem;
      padding: 0.4rem 0.5rem;
    }

    .fretboard-faq__interval-grid--tones {
      margin: 0.2rem 0 0.7rem;
      padding: 0.4rem 0.5rem;
    }

    .fretboard-faq__formula-name {
      margin: 0 0 0.3rem;
      color: #f6c24a;
      font-weight: 700;
      line-height: 1.3;
      text-transform: uppercase;
      letter-spacing: 0.03em;
      font-size: 0.78rem;
    }

    .fretboard-faq__formula-line {
      margin: 0;
      padding: 0.3rem 0.45rem;
      border-radius: 8px;
      border: 1px solid rgba(246, 194, 74, 0.34);
      background: rgba(246, 194, 74, 0.12);
      font-family: "Cal Sans", system-ui, sans-serif;
      color: #f6c24a;
      font-weight: 700;
      letter-spacing: 0.01em;
      text-align: center;
      line-height: 1.2;
    }

    .fretboard-faq__inline-link {
      color: #f6c24a;
      text-decoration: underline;
    }

    .fretboard-faq__card h3 {
      margin: 1.15rem 0 0.55rem;
      font-size: 1.25rem;
      color: #f9f5ed;
    }

    .fretboard-faq__card p:last-child {
      margin-bottom: 0;
    }

    .scale-type-label-short {
      display: none;
    }

    @media (max-width: 991.98px) {
      .fretboard-page-intro {
        padding: 0;
      }

      .fretboard-page-intro__inner {
        padding: 1.15rem 0.95rem 1rem;
      }

      .fretboard-hero {
        grid-template-columns: minmax(0, 1fr);
        gap: 1rem;
      }

      .fretboard-info-grid {
        grid-template-columns: minmax(0, 1fr);
      }

      .fretboard-section-divider {
        padding: 0.2rem 0.8rem 0.9rem;
      }

      .fretboard-shell {
        padding: 0.8rem;
      }

      .fretboard-head {
        margin-bottom: 0.5rem;
      }

      .fretboard-panel__controls,
      .fretboard-panel__display,
      .fretboard-panel__options {
        padding: 0.65rem;
      }

      .fretboard-panel__title {
        font-size: 0.95rem;
        margin-bottom: 0.45rem;
      }

      .fretboard-mobile-toolbar {
        display: block;
        margin-bottom: 0.55rem;
      }

      .fretboard-mobile-view-switch {
        display: grid;
        width: 100%;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.35rem;
      }

      .fretboard-mobile-view-switch .btn {
        width: 100%;
        min-height: 34px;
        padding: 0.36rem 0.3rem;
        font-size: 0.74rem;
        border-radius: 10px;
        line-height: 1.15;
      }

      .fretboard-intro-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
      }

      .fretboard-page-intro__inner.is-collapsed [data-intro-content] {
        display: none;
      }

      .fretboard-mobile-hint {
        display: block;
        margin: 0 0 0.6rem;
        font-size: 0.78rem;
        color: rgba(246, 241, 231, 0.78);
      }

      .fretboard-controls {
        display: block;
      }

      .fretboard-controls + .fretboard-controls {
        margin-top: 0;
      }

      .note-location-menu {
        display: none;
        flex: 1 1 100%;
        width: 100%;
        min-width: 0;
        padding: 0.68rem 0.68rem 0.72rem;
        border-radius: 6px;
      }

      .note-location-menu.is-mobile-active {
        display: flex;
      }

      .note-location-menu > * {
        min-width: 0;
      }

      .note-location-menu > [data-action="note-location"],
      .note-location-menu > [data-action="key-center"],
      .note-location-menu > [data-action="mode-center"],
      .note-location-menu > [data-action="pentatonic-center"],
      .note-location-menu > [data-action="exotic-center"] {
        display: none;
      }

      .note-location-menu > [data-action^="clear"] {
        width: 100%;
      }

      .note-location-menu .form-select {
        width: 100%;
        min-width: 0;
        flex: 1 1 100%;
      }

      .note-location-menu .note-status-legend {
        flex: 1 1 100%;
        margin-right: 0;
        white-space: normal;
        flex-wrap: wrap;
        row-gap: 0.35rem;
      }

      .note-status-legend__label-characteristic {
        display: none !important;
      }

      .note-status-legend__label-characteristic-short {
        display: inline !important;
      }

      .note-location-menu .btn-group {
        max-width: 100%;
      }

      .note-location-menu .btn-group[aria-label="Scale type"] {
        width: 100%;
        flex: 1 1 100%;
        display: flex;
        flex-wrap: wrap;
        gap: 0.35rem;
      }

      .note-location-menu .btn-group[aria-label="Scale type"] .btn {
        min-width: 0;
        flex: 1 1 calc(50% - 0.2rem);
        padding: 0 0.45rem;
        font-size: 0.9rem;
      }

      .scale-type-label-long {
        display: none;
      }

      .scale-type-label-short {
        display: inline;
      }

      .fretboard-canvas-wrap {
        overflow: hidden;
        touch-action: manipulation;
      }

      .fretboard-canvas {
        width: 100%;
        min-width: 0;
        height: clamp(120px, 36vw, 168px);
      }

      .fretboard-svg {
        width: 100%;
        height: 100%;
        min-width: 0;
      }

      body.fretboard-fit-mobile .note-text {
        font-size: 24px;
        font-weight: 600;
        fill: #141414;
        paint-order: stroke;
        stroke: rgba(255, 255, 255, 0.65);
        stroke-width: 1.6px;
        letter-spacing: 0.01em;
      }

      body.fretboard-fit-mobile .note-chip {
        stroke-width: 2.8;
        filter: drop-shadow(0 9px 18px rgba(0, 0, 0, 0.5));
      }

      body.fretboard-fit-mobile .fret-number-text {
        display: block;
        font-size: 26px;
        font-weight: 600;
        fill: rgba(255, 255, 255, 0.75);
        paint-order: stroke;
        stroke: rgba(0, 0, 0, 0.82);
        stroke-width: 1.8px;
        letter-spacing: 0.02em;
      }
    }

    .fretboard-rotate-overlay {
      position: fixed;
      inset: 0;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      background: rgba(4, 4, 8, 0.78);
      z-index: 2500;
    }

    .fretboard-rotate-overlay.is-visible {
      display: flex;
    }

    .fretboard-rotate-card {
      width: min(92vw, 420px);
      padding: 1.1rem 1rem 0.95rem;
      border-radius: 14px;
      border: 1px solid rgba(246, 194, 74, 0.4);
      background: linear-gradient(170deg, rgba(20, 18, 14, 0.98), rgba(14, 13, 12, 0.98));
      box-shadow: 0 18px 38px rgba(0, 0, 0, 0.48);
      text-align: left;
    }

    .fretboard-rotate-card .fretboard-rotate-title {
      margin: 0 0 0.4rem;
      font-size: 1.15rem;
      font-weight: 700;
      color: #f6c24a;
    }

    .fretboard-rotate-card p {
      margin: 0;
      color: rgba(246, 241, 231, 0.92);
      line-height: 1.5;
    }

    body.fretboard-no-scroll {
      overflow: hidden;
      height: 100vh;
    }

    .note-location-menu {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
      min-width: 0;
      align-items: flex-start;
      align-content: flex-start;
      flex: 1 1 auto;
      width: 100%;
      height: 100%;
      min-height: 112px;
      justify-content: flex-start;
      padding: 0.72rem 0.85rem 0.76rem;
      border-radius: 6px;
      background: #101010;
      border: 1px solid var(--fretboard-control-border);
      box-shadow:
        inset 0 1px 0 rgba(255, 215, 120, 0.15),
        inset 0 2px 6px rgba(0, 0, 0, 0.6),
        0 10px 20px rgba(0, 0, 0, 0.5);
      transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    }

    .note-location-menu:hover {
      border-color: rgba(255, 215, 120, 0.7);
      transform: translateY(-4px);
    }

    .note-location-menu > * {
      flex: 0 0 auto;
    }

    .note-location-menu .btn-group {
      flex-wrap: nowrap;
    }

    .fretboard-global-legend {
      margin-top: 0;
      padding: 0.62rem 0.9rem 0.66rem;
      border-radius: 6px;
      border: 1px solid rgba(255, 215, 120, 0.25);
      background: #101010;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .fretboard-global-legend .note-status-legend {
      margin-right: 0;
      gap: 0.85rem;
      flex-wrap: wrap;
      justify-content: center;
      white-space: normal;
    }

    .note-status-legend {
      display: inline-flex;
      align-items: center;
      gap: 0.65rem;
      font-size: 0.9rem;
      color: rgba(246, 241, 231, 0.9);
      line-height: 1.25;
      white-space: nowrap;
      margin-right: 0.2rem;
    }

    .note-status-legend__item {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
    }

    .note-status-legend__label-characteristic-short {
      display: none;
    }

    .note-status-legend__dot {
      width: 0.75rem;
      height: 0.75rem;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.45);
      display: inline-block;
      flex: 0 0 auto;
      padding: 0;
      appearance: none;
      -webkit-appearance: none;
      cursor: pointer;
      transition: opacity 0.2s ease, transform 0.2s ease, filter 0.2s ease;
    }

    .note-status-legend__dot:hover {
      transform: scale(1.08);
    }

    .note-status-legend__dot:focus-visible {
      outline: 2px solid rgba(246, 194, 74, 0.9);
      outline-offset: 2px;
    }

    .note-status-legend__dot.is-off {
      opacity: 0.35;
      filter: saturate(0.4);
    }

    .note-status-legend__dot--tonic {
      background: #ffcc33;
      border-color: rgba(255, 240, 200, 0.85);
    }

    .note-status-legend__dot--third {
      background: #4bc187;
      border-color: rgba(168, 242, 207, 0.78);
    }

    .note-status-legend__dot--characteristic {
      background: #9fbaf3;
      border-color: rgba(223, 235, 255, 0.78);
    }

    .note-status-legend__dot--fifth {
      background: #4fcfe0;
      border-color: rgba(191, 247, 255, 0.82);
    }

    .fretboard-interval-formula {
      margin: 0.58rem 0 0;
      padding: 0.62rem 0.96rem 0.66rem;
      border-radius: 6px;
      border: 1px solid rgba(255, 215, 120, 0.35);
      background: #111111;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      color: #f2d59a;
      font-size: clamp(1rem, 1.6vw, 1.18rem);
      font-weight: 700;
      text-align: center;
      line-height: 1.25;
      letter-spacing: 0.03em;
      min-height: 2.85rem;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    @media (max-width: 991.98px) {
      .fretboard-global-legend {
        margin-top: 0.55rem;
        padding: 0.58rem 0.68rem 0.62rem;
        justify-content: flex-start;
      }

      .fretboard-global-legend .note-status-legend {
        width: 100%;
        justify-content: flex-start;
        row-gap: 0.35rem;
      }

      .fretboard-interval-formula {
        margin-top: 0.48rem;
        padding: 0.54rem 0.72rem 0.58rem;
        border-radius: 10px;
        font-size: clamp(1rem, 4vw, 1.15rem);
        letter-spacing: 0.03em;
      }
    }

    .note-location-menu .form-select {
      min-width: 150px;
      border-radius: 6px;
      padding: 0.45rem 2.3rem 0.45rem 0.8rem;
      background-color: var(--fretboard-control-bg);
      color: #f7f7f7;
      border: 1px solid var(--fretboard-control-border);
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.56);
      font-weight: 500;
      letter-spacing: 0.01em;
      transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    }

    .note-location-menu .form-select:focus {
      border-color: rgba(255, 204, 51, 0.9);
      box-shadow: 0 0 0 0.2rem rgba(255, 204, 51, 0.2);
    }

    .note-location-menu .form-select option {
      color: #f7f7f7;
      background-color: #161616;
    }

    .note-location-menu .btn,
    .note-location-menu .btn-group .btn {
      border-radius: 6px;
      letter-spacing: 0.02em;
      background-color: var(--fretboard-control-bg);
      color: #ffffff;
      border-color: var(--fretboard-control-border);
      font-weight: 500;
      transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .note-location-menu .btn-group .btn {
      min-width: 42px;
      height: 36px;
      padding: 0 0.6rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .note-location-menu .btn:hover,
    .note-location-menu .btn-group .btn:hover {
      background-color: #1d1d1d;
      color: #ffffff;
      box-shadow: 0 0 0 1px rgba(255, 215, 120, 0.55), 0 0 12px rgba(255, 215, 120, 0.2);
      transform: translateY(-1px);
    }

    .note-location-menu .btn-check:checked + .btn {
      background: linear-gradient(180deg, #f7d98b 0%, #d4a942 100%);
      color: #16110a;
      border-color: rgba(255, 215, 120, 0.95);
      box-shadow: 0 0 0 1px rgba(255, 215, 120, 0.58), 0 0 14px rgba(255, 215, 120, 0.2);
    }

    .note-location-menu .btn.is-selected {
      background: linear-gradient(180deg, #f7d98b 0%, #d4a942 100%);
      color: #16110a;
      border-color: rgba(255, 215, 120, 0.95);
      box-shadow: 0 0 0 1px rgba(255, 215, 120, 0.58), 0 0 14px rgba(255, 215, 120, 0.2);
    }

    .fretboard-mobile-view-switch .btn,
    .fretboard-intro-toggle {
      background-color: var(--fretboard-control-bg);
      color: #ffffff;
      border-color: var(--fretboard-control-border);
      border-radius: 6px;
    }

    .fretboard-mobile-view-switch .btn:hover,
    .fretboard-intro-toggle:hover {
      box-shadow: 0 0 0 1px rgba(255, 215, 120, 0.55), 0 0 10px rgba(255, 215, 120, 0.2);
      border-color: rgba(255, 215, 120, 0.7);
    }

    .fretboard-mobile-view-switch .btn.is-selected {
      background: linear-gradient(180deg, #f7d98b 0%, #d4a942 100%);
      color: #151515;
      border-color: rgba(255, 215, 120, 0.95);
    }

    .fretboard-svg {
      width: 100%;
      height: auto;
      display: block;
    }

    body.fretboard-fit-mobile .fretboard-svg {
      width: 100%;
      height: 100%;
      min-width: 0;
    }

    .fret-box {
      fill: rgba(255, 255, 255, 0.001);
      stroke: transparent;
      stroke-width: 2;
      cursor: pointer;
      pointer-events: all;
      transition: fill 0.2s ease, stroke 0.2s ease;
    }

    .fret-box:hover {
      fill: rgba(255, 204, 51, 0.08);
      stroke: rgba(255, 204, 51, 0.35);
    }

    .fret-box.is-active {
      fill: rgba(45, 30, 18, 0.78);
      stroke: rgba(168, 130, 72, 0.85);
    }

    .note-layer {
      pointer-events: none;
    }

    .note-group {
      opacity: 0;
      transform: scale(0.94);
      transform-origin: center;
      transform-box: fill-box;
      animation: note-pop 180ms ease-out forwards;
    }

    @keyframes note-pop {
      to {
        opacity: 1;
        transform: scale(1);
      }
    }

    .note-chip {
      fill: url(#noteGrad);
      stroke: rgba(0, 0, 0, 0.55);
      stroke-width: 2.4;
      filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.45));
      transition: filter 0.2s ease, transform 0.2s ease;
    }

    .note-chip.is-root {
      fill: url(#rootGrad);
      stroke: rgba(80, 60, 10, 0.75);
      filter: drop-shadow(0 10px 18px rgba(255, 204, 51, 0.28));
    }

    .note-chip.is-third {
      fill: url(#thirdGrad);
      stroke: rgba(20, 80, 50, 0.7);
    }

    .note-chip.is-characteristic {
      fill: url(#characteristicGrad);
      stroke: rgba(35, 55, 95, 0.7);
    }

    .note-chip.is-fifth {
      fill: url(#fifthGrad);
      stroke: rgba(25, 90, 105, 0.7);
    }

    .note-text {
      font-family: "Cal Sans", system-ui, sans-serif;
      font-size: 22px;
      font-weight: 600;
      fill: #141414;
      text-anchor: middle;
      dominant-baseline: central;
      pointer-events: none;
      paint-order: stroke;
      stroke: rgba(255, 255, 255, 0.6);
      stroke-width: 1.4px;
      letter-spacing: 0.01em;
    }

    .note-chip.is-root + .note-text {
      fill: #1a1505;
      stroke: rgba(255, 255, 255, 0.7);
    }

    .inlay-dot {
      fill: url(#inlayPearl);
      opacity: 0.6;
      stroke: rgba(0, 0, 0, 0.45);
      stroke-width: 1.6;
      filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.35));
    }

    .fret-number-text {
      font-family: "Cal Sans", system-ui, sans-serif;
      font-size: 24px;
      font-weight: 600;
      fill: rgba(255, 255, 255, 0.7);
      text-anchor: middle;
      dominant-baseline: central;
    }

    /* Keep this at the end so mobile panel visibility wins over base menu rules */
    @media (max-width: 991.98px) {
      .fretboard-controls .note-location-menu {
        display: none !important;
      }

      .fretboard-controls .note-location-menu.is-mobile-active {
        display: flex !important;
      }
    }



@media (max-width: 991.98px) and (orientation: landscape) {
  .fretboard-lab {
    padding: 0.8rem 0.35rem 1.05rem;
  }

  .fretboard-shell {
    padding: 0.78rem 0.4rem 0.9rem;
  }

  .fretboard-canvas-wrap {
    margin-top: 0.35rem;
  }

  .fretboard-canvas {
    height: clamp(420px, 94vh, 820px);
    padding: 0.14rem 0.08rem 0.18rem;
  }
}

.fretboard-faq-collection {
  border: 1px solid rgba(213, 168, 66, 0.28);
  border-radius: 12px;
  overflow: hidden;
}

.fretboard-faq-collection__summary {
  position: relative;
  display: block;
  padding: 1.4rem 4rem 1.4rem 1.5rem;
  cursor: pointer;
  list-style: none;
}

.fretboard-faq-collection__summary::-webkit-details-marker { display: none; }
.fretboard-faq-collection__summary::after {
  content: "+";
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  color: #d5a842;
  font-size: 2rem;
}
.fretboard-faq-collection[open] > .fretboard-faq-collection__summary::after { content: "\2212"; }
.fretboard-faq-collection__title { color: #f4f1e8; font-size: clamp(1.45rem, 2vw, 2rem); font-weight: 700; }
.fretboard-faq-collection__content { padding: 0 1rem 1rem; }



@media (max-width: 991.98px) {
  .fretboard-faq {
    display: none !important;
  }
}



/* Landscape mobile compact controls override */
@media (max-width: 991.98px) and (orientation: landscape) {
  .fretboard-mobile-hint {
    margin: 0 0 0.34rem;
    font-size: 0.72rem;
    line-height: 1.2;
  }

  .note-location-menu[data-view-panel="note"].is-mobile-active {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.34rem 0.42rem;
    padding: 0.46rem 0.52rem 0.48rem;
    border-radius: 6px;
  }

  .note-location-menu[data-view-panel="note"] .form-select {
    grid-column: 1 / -1;
    flex: 0 0 auto;
    height: 32px;
    padding: 0.2rem 1.8rem 0.2rem 0.62rem;
    font-size: 0.83rem;
  }

  .note-location-menu[data-view-panel="note"] .btn-group[aria-label="Accidental"] {
    grid-column: 1;
    width: auto;
  }

  .note-location-menu[data-view-panel="note"] .btn-group[aria-label="Accidental"] .btn {
    min-width: 34px;
    height: 30px;
    padding: 0 0.38rem;
    font-size: 0.82rem;
  }

  .note-location-menu[data-view-panel="note"] > [data-action^="clear"] {
    grid-column: 2;
    width: auto;
    min-width: 92px;
    min-height: 32px;
    padding: 0 0.58rem;
    white-space: nowrap;
    align-self: stretch;
  }

  .fretboard-global-legend {
    margin-top: 0.34rem;
    padding: 0.38rem 0.5rem 0.4rem;
    border-radius: 10px;
  }

  .fretboard-global-legend .note-status-legend {
    gap: 0.5rem;
    row-gap: 0.22rem;
    font-size: 0.78rem;
    line-height: 1.12;
  }

  .fretboard-global-legend .note-status-legend__item {
    gap: 0.24rem;
  }

  .fretboard-global-legend .note-status-legend__dot {
    width: 0.64rem;
    height: 0.64rem;
  }
}

/* Keep the desktop introduction on one exact centre line. */
@media (min-width: 992px) {
  .fretboard-page-intro__inner {
    padding-left: max(1.6rem, calc((100% - 1200px) / 2));
    padding-right: max(1.6rem, calc((100% - 1200px) / 2));
  }

  .fretboard-page-intro__inner > .fretboard-hero,
  .fretboard-page-intro__inner > .fretboard-intro-actions,
  .fretboard-page-intro__inner > [data-intro-content] {
    width: 100%;
    max-width: 1200px;
  }

  .fretboard-hero__left,
  .fretboard-intro-lead {
    margin-left: auto;
    margin-right: auto;
  }

  .fretboard-intro-lead {
    text-align: center;
  }
}

/* Embed the fretboard directly below the controls. */
.fretboard-panel {
  gap: 0;
}

.fretboard-panel__display {
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #000;
  box-shadow: none;
}

.fretboard-panel__display .fretboard-key-strip {
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.fretboard-panel__display .fretboard-key-strip:has(.fretboard-interval-formula:empty) {
  display: none;
}

.fretboard-panel__display .fretboard-canvas-wrap {
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.fretboard-panel__display .fretboard-canvas {
  padding: 0;
}

@media (min-width: 992px) {
  .fretboard-panel__controls {
    padding-bottom: 0;
  }

  .fretboard-panel__controls > .fretboard-controls {
    padding-bottom: 0.5rem;
  }
}

/* Final sleek sizing override. */
@media (min-width: 992px) {
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    min-height: 118px;
    gap: 6px;
    padding-inline: 12px;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child {
    margin: 0 0 5px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 10px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.09em;
  }

  .fretboard-panel__controls .note-location-menu .form-select {
    height: 34px;
    min-height: 34px;
    padding: 4px 30px 4px 11px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px;
    background-color: #080909;
    background-size: 12px 9px;
    color: rgba(255, 255, 255, 0.86);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.1;
  }

  .fretboard-panel__controls .note-location-menu .btn-group {
    min-height: 32px;
    height: 32px;
  }

  .fretboard-panel__controls .note-location-menu .btn-group .btn {
    min-height: 32px;
    padding: 2px 10px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 650;
  }

  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    width: max-content;
    min-width: 0;
    min-height: 28px;
    height: 28px;
    margin-top: 2px;
    padding: 2px 9px;
    border-color: rgba(255, 255, 255, 0.09);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.025);
    color: rgba(255, 255, 255, 0.48);
    font-size: 10px;
    font-weight: 650;
    letter-spacing: 0.04em;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child.is-selected,
  .fretboard-panel__controls .note-location-menu > button:first-child[aria-pressed="true"],
  .fretboard-panel__controls .note-location-menu > button:first-child.active {
    border: 0;
    background: transparent;
    color: rgba(255, 255, 255, 0.72);
    box-shadow: none;
  }
}

/* Sleek desktop control sizing — intentionally last in the cascade. */
@media (min-width: 992px) {
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    min-height: 118px;
    gap: 6px;
    padding-inline: 12px;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child {
    margin: 0 0 5px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 10px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.09em;
  }

  .fretboard-panel__controls .note-location-menu .form-select {
    height: 34px;
    min-height: 34px;
    padding: 4px 30px 4px 11px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px;
    background-color: #080909;
    background-size: 12px 9px;
    color: rgba(255, 255, 255, 0.86);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.1;
  }

  .fretboard-panel__controls .note-location-menu .form-select:hover {
    border-color: rgba(255, 255, 255, 0.22);
  }

  .fretboard-panel__controls .note-location-menu .form-select:focus {
    border-color: rgba(246, 194, 74, 0.55);
    box-shadow: 0 0 0 1px rgba(246, 194, 74, 0.12);
  }

  .fretboard-panel__controls .note-location-menu .btn-group {
    min-height: 32px;
    height: 32px;
  }

  .fretboard-panel__controls .note-location-menu .btn-group .btn {
    min-height: 32px;
    padding: 2px 10px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 650;
  }

  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    width: max-content;
    min-width: 0;
    min-height: 28px;
    height: 28px;
    margin-top: 2px;
    padding: 2px 9px;
    border-color: rgba(255, 255, 255, 0.09);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.025);
    color: rgba(255, 255, 255, 0.48);
    font-size: 10px;
    font-weight: 650;
    letter-spacing: 0.04em;
  }

  .fretboard-panel__controls .note-location-menu > [data-action^="clear"]:hover {
    border-color: rgba(246, 194, 74, 0.3);
    background: rgba(246, 194, 74, 0.06);
    color: #f6c24a;
  }
}

/* Ultra-compact desktop utility strip. */
@media (min-width: 992px) {
  .fretboard-panel__controls {
    padding: 0.4rem 0.75rem 0;
  }

  .fretboard-panel__controls .fretboard-controls-heading {
    display: none;
  }

  .fretboard-panel__controls .fretboard-tuning-control {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 0.55rem;
    margin: 0 0 0.35rem;
    padding: 0.25rem 0 0.4rem;
  }

  .fretboard-panel__controls .fretboard-tuning-control__label::after {
    display: none;
  }

  .fretboard-panel__controls .fretboard-tuning-select {
    min-height: 32px;
    height: 32px;
    font-size: 0.76rem;
  }

  .fretboard-panel__controls > .fretboard-controls {
    padding-bottom: 0.25rem;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    min-height: 102px;
    gap: 0.22rem;
    padding-inline: 0.5rem;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child {
    margin-bottom: 0.18rem;
    font-size: 0.6rem;
    line-height: 1;
  }

  .fretboard-panel__controls .note-location-menu .form-select,
  .fretboard-panel__controls .note-location-menu .btn-group,
  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    min-height: 30px;
    height: 30px;
  }

  .fretboard-panel__controls .note-location-menu .form-select {
    padding-block: 0.1rem;
    font-size: 0.72rem;
  }

  .fretboard-panel__controls .note-location-menu .btn,
  .fretboard-panel__controls .note-location-menu .btn-group .btn {
    padding: 0.15rem 0.4rem;
    font-size: 0.66rem;
  }
}

/* Compact desktop scale so the fretboard remains the primary view. */
@media (min-width: 992px) {
  .fretboard-panel__controls {
    padding: 0.65rem 1rem 0;
    border-radius: 10px;
  }

  .fretboard-panel__controls .fretboard-controls-heading {
    padding-bottom: 0.45rem;
  }

  .fretboard-controls-heading__eyebrow {
    margin-bottom: 0.08rem;
    font-size: 0.58rem;
  }

  .fretboard-controls-heading .fretboard-panel__title {
    font-size: 1.2rem;
  }

  .fretboard-controls-heading__copy {
    font-size: 0.72rem;
  }

  .fretboard-panel__controls .fretboard-tuning-control {
    grid-template-columns: 170px minmax(0, 1fr);
    margin-bottom: 0.55rem;
    padding: 0.45rem 0;
  }

  .fretboard-panel__controls .fretboard-tuning-control__label {
    font-size: 0.62rem;
  }

  .fretboard-panel__controls .fretboard-tuning-control__label::after {
    margin-top: 0.08rem;
    font-size: 0.56rem;
  }

  .fretboard-panel__controls .fretboard-tuning-select {
    min-height: 36px;
    padding-block: 0.25rem;
    font-size: 0.84rem;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    min-height: 145px;
    gap: 0.35rem;
    padding-inline: 0.65rem;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child {
    margin-bottom: 0.35rem;
    font-size: 0.66rem;
  }

  .fretboard-panel__controls .note-location-menu .form-select {
    min-height: 36px;
    padding-block: 0.25rem;
    font-size: 0.82rem;
  }

  .fretboard-panel__controls .note-location-menu .btn-group,
  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    min-height: 36px;
  }

  .fretboard-panel__controls .note-location-menu .btn,
  .fretboard-panel__controls .note-location-menu .btn-group .btn {
    padding-block: 0.28rem;
    font-size: 0.72rem;
  }

  .fretboard-panel__controls > .fretboard-controls {
    padding-bottom: 0.3rem;
  }
}

/* Match the revised chord-tool visual language where the two tools overlap. */
.fretboard-page-intro__inner {
  background: #0b0b0b;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.fretboard-page-intro__inner.is-collapsed {
  padding-block: 0.9rem;
}

.fretboard-page-intro__inner.is-collapsed h1 {
  margin-bottom: 0.5rem;
}

.fretboard-page-intro__inner::before {
  background-size: 1920px auto;
  background-position: center top;
  background-repeat: repeat-y;
  background-attachment: fixed;
  opacity: 0.32;
  filter: none;
}

.fretboard-page-intro h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.fretboard-intro-lead {
  color: rgba(246, 241, 231, 0.74);
  font-size: clamp(0.92rem, 1.1vw, 1rem);
  line-height: 1.7;
}

.fretboard-intro-toggle {
  display: flex;
  width: max-content;
  min-height: 44px;
  margin: 0 auto 0.9rem;
  padding: 0.65rem 1.1rem;
  align-items: center;
  justify-content: center;
  border: 1px solid #efd58c !important;
  border-radius: 0 !important;
  background: #d2a449 !important;
  color: #171109 !important;
  box-shadow: none !important;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.fretboard-intro-toggle:hover,
.fretboard-intro-toggle:focus-visible {
  border-color: #f5dda0 !important;
  background: #e0b65d !important;
  color: #171109 !important;
  box-shadow: none !important;
  outline: 2px solid rgba(246, 194, 74, 0.32);
  outline-offset: 3px;
}

.fretboard-intro-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
}

.fretboard-intro-actions .fretboard-intro-toggle {
  margin: 0;
}

.fretboard-tutorial-launch {
  display: flex;
  min-height: 44px;
  padding: 0.65rem 1.1rem;
  align-items: center;
  justify-content: center;
  border: 1px solid #efd58c !important;
  border-radius: 0 !important;
  background: #d2a449 !important;
  color: #171109 !important;
  box-shadow: none !important;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.fretboard-tutorial-launch:hover,
.fretboard-tutorial-launch:focus-visible {
  border-color: #f5dda0 !important;
  background: #e0b65d !important;
  color: #171109 !important;
  box-shadow: none !important;
  outline: 2px solid rgba(246, 194, 74, 0.32);
  outline-offset: 3px;
}

.chord-tour-option-list.fretboard-tour-option-list {
  max-height: min(240px, 40vh);
  overflow-y: auto;
}

.fretboard-info-grid {
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.fretboard-info-card,
.fretboard-info-card:hover,
.fretboard-info-card:focus-within {
  padding: 1.1rem 1.25rem;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transform: none;
}

.fretboard-info-card:last-child {
  border-right: 0;
}

.fretboard-section-divider span {
  background: rgba(246, 194, 74, 0.42);
}

.fretboard-shell,
.fretboard-panel__controls,
.fretboard-panel__display,
.fretboard-panel__options {
  border-radius: 0;
  background: #0b0b0b;
  box-shadow: none;
}

.fretboard-shell {
  border-inline: 0;
  padding-inline: clamp(0.75rem, 2vw, 1.25rem);
}

.fretboard-panel__controls,
.fretboard-panel__display,
.fretboard-panel__options {
  border-color: rgba(255, 255, 255, 0.1);
}

.fretboard-panel__title {
  color: #f6c24a;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.fretboard-controls {
  gap: 0;
  border-block: 1px solid rgba(255, 255, 255, 0.1);
}

.fretboard-controls .note-location-menu {
  padding: 0.85rem;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.fretboard-controls .note-location-menu:last-child {
  border-right: 0;
}

.fretboard-controls .note-location-menu:hover {
  border-color: rgba(255, 255, 255, 0.1);
  transform: none;
  box-shadow: none;
}

.fretboard-controls .btn,
.fretboard-controls .form-select,
.fretboard-mobile-view-switch .btn,
.fretboard-canvas-wrap {
  border-radius: 0;
  box-shadow: none;
}

.fretboard-controls .form-select {
  border-color: rgba(255, 255, 255, 0.16);
  background-color: #111;
}

.fretboard-controls .form-select:focus {
  border-color: rgba(246, 194, 74, 0.72);
  box-shadow: 0 0 0 2px rgba(246, 194, 74, 0.12);
}

.fretboard-controls .btn:hover,
.fretboard-controls .btn-group .btn:hover {
  transform: none;
  box-shadow: none;
}

.fretboard-controls .btn-check:checked + .btn,
.fretboard-controls .btn.is-selected,
.fretboard-mobile-view-switch .btn.is-selected {
  border-color: rgba(246, 194, 74, 0.3);
  background: rgba(246, 194, 74, 0.14);
  color: #ffd365;
  box-shadow: inset 0 -2px 0 #f6c24a;
}

.fretboard-canvas-wrap {
  border-color: rgba(246, 194, 74, 0.28);
  background: #0d0d0d;
}

.fretboard-key-strip {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  margin: 0 0 0.65rem;
  padding: 0.55rem 0;
  border-block: 1px solid rgba(255, 255, 255, 0.1);
}

.fretboard-key-strip .fretboard-global-legend,
.fretboard-key-strip .fretboard-interval-formula {
  width: auto;
  max-width: 100%;
  min-width: 0;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  text-align: center;
}

.fretboard-key-strip .note-status-legend {
  min-width: 0;
  justify-content: center;
  white-space: normal;
}

.fretboard-key-strip .fretboard-interval-formula {
  color: #f8cf72;
  font-size: clamp(0.95rem, 1.35vw, 1.08rem);
  text-align: center;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: normal;
}

@media (max-width: 991.98px) {
  .fretboard-info-grid {
    border-top: 0;
  }

  .fretboard-info-card,
  .fretboard-info-card:hover,
  .fretboard-info-card:focus-within {
    padding: 0.9rem 0;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .fretboard-controls {
    gap: 0.55rem;
    border-block: 0;
  }

  .fretboard-controls .note-location-menu,
  .fretboard-controls .note-location-menu:last-child {
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .fretboard-key-strip {
    align-items: center;
    gap: 0.45rem;
  }

  .fretboard-key-strip .fretboard-global-legend,
  .fretboard-key-strip .fretboard-interval-formula {
    margin: 0;
    padding: 0;
    text-align: center;
  }
}
/* Landscape mobile UI polish pass */
@media (max-width: 991.98px) and (orientation: landscape) {
  .fretboard-shell {
    padding: 0.64rem 0.24rem 0.7rem;
  }

  .fretboard-head {
    margin-bottom: 0.3rem;
  }

  .fretboard-head .section-kicker {
    margin: 0;
    font-size: 0.66rem;
    letter-spacing: 0.09em;
    opacity: 0.82;
  }

  .fretboard-mobile-toolbar {
    margin-bottom: 0.34rem;
  }

  .fretboard-mobile-view-switch {
    display: flex;
    grid-template-columns: none;
    flex-wrap: nowrap;
    gap: 0.28rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.08rem;
  }

  .fretboard-mobile-view-switch::-webkit-scrollbar {
    display: none;
  }

  .fretboard-mobile-view-switch .btn {
    flex: 0 0 auto;
    width: auto;
    min-width: 108px;
    min-height: 30px;
    padding: 0.33rem 0.56rem;
    font-size: 0.72rem;
    line-height: 1.1;
    white-space: nowrap;
  }

  .fretboard-mobile-hint {
    display: none;
  }

  .note-location-menu[data-view-panel="note"].is-mobile-active {
    height: auto;
    min-height: 0;
    align-content: start;
    gap: 0.24rem 0.34rem;
    padding: 0.36rem 0.44rem 0.4rem;
  }

  .note-location-menu[data-view-panel="note"] .form-select {
    height: 30px;
    font-size: 0.8rem;
    padding: 0.18rem 1.72rem 0.18rem 0.56rem;
  }

  .note-location-menu[data-view-panel="note"] .btn-group[aria-label="Accidental"] {
    display: inline-flex;
    width: max-content;
    justify-self: start;
  }

  .note-location-menu[data-view-panel="note"] .btn-group[aria-label="Accidental"] .btn {
    flex: 0 0 auto !important;
    width: 32px;
    min-width: 32px;
    height: 28px;
    padding: 0;
    font-size: 0.8rem;
  }

  .note-location-menu[data-view-panel="note"] > [data-action^="clear"] {
    min-width: 84px;
    min-height: 28px;
    padding: 0 0.5rem;
    font-size: 0.82rem;
    border-radius: 8px;
  }

  .fretboard-global-legend {
    margin-top: 0.24rem;
    padding: 0.3rem 0.4rem 0.32rem;
  }

  .fretboard-global-legend .note-status-legend {
    gap: 0.42rem;
    font-size: 0.72rem;
  }
}

/* Scale tool mode switch and analyser */
.scale-tool-toolbar {
  display: flex;
  justify-content: center;
  margin: 0 auto 18px;
  padding: 0 20px;
}

.scale-tool-mode-toggle {
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: rgba(10, 12, 15, 0.72);
}

.scale-tool-mode-toggle .btn {
  min-width: 132px;
  border: 0;
  border-radius: 7px !important;
}

.scale-tool-mode-toggle .btn.is-selected {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.scale-analyser {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  background: rgba(13, 16, 20, 0.82);
}

.scale-analyser__heading,
.scale-match-tier__heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.scale-analyser__heading h2,
.scale-match-tier__heading h3 {
  margin: 0;
}

.scale-analyser__heading > div > p:last-child {
  max-width: 780px;
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.68);
}

.scale-analyser__eyebrow,
.scale-match-tier__label {
  margin: 0 0 5px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.52);
}

.scale-analyser__count,
.scale-match-tier__count {
  flex: 0 0 auto;
  margin: 0;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.85rem;
}

.scale-analyser__picker {
  display: grid;
  grid-template-columns: repeat(12, minmax(60px, 1fr));
  gap: 7px;
  margin-top: 24px;
}

.scale-note-option {
  min-height: 62px;
  padding: 9px 5px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.035);
  color: rgba(255, 255, 255, 0.88);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.scale-note-option:hover {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.075);
}

.scale-note-option.is-selected {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.scale-note-option:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.scale-note-option__alt {
  display: block;
  margin-top: 2px;
  font-size: 0.67rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.58);
}

.scale-analyser__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}

.scale-analyser__status {
  margin: 0 0 0 auto;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.88rem;
}

.scale-analyser__results {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.scale-match-tier {
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}

.scale-match-tier--exact {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.045);
}

.scale-match-tier__intro {
  margin: 7px 0 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.88rem;
}

.scale-match-list {
  display: grid;
  gap: 8px;
  margin-top: 15px;
}

.scale-match-card {
  display: grid;
  grid-template-columns: minmax(190px, 0.75fr) minmax(250px, 1.25fr) auto;
  align-items: center;
  gap: 18px;
  padding: 13px 15px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 9px;
  background: rgba(0, 0, 0, 0.14);
}

.scale-match-card__name {
  margin: 0;
  color: #fff;
  font-weight: 700;
}

.scale-match-card__notes,
.scale-match-card__extra {
  margin: 0;
  color: rgba(255, 255, 255, 0.67);
  font-size: 0.88rem;
}

.scale-match-card__extra {
  text-align: right;
}

.scale-match-empty {
  margin: 0;
  padding: 12px 0 2px;
  color: rgba(255, 255, 255, 0.52);
}

@media (max-width: 991.98px) {
  .scale-analyser__picker {
    grid-template-columns: repeat(6, 1fr);
  }

  .scale-match-card {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .scale-match-card__extra {
    text-align: left;
  }
}

@media (max-width: 575.98px) {
  .scale-tool-mode-toggle,
  .scale-tool-mode-toggle .btn {
    width: 100%;
  }

  .scale-analyser {
    width: calc(100% - 20px);
    padding: 18px 14px;
  }

  .scale-analyser__heading {
    display: block;
  }

  .scale-analyser__count {
    display: inline-block;
    margin-top: 12px;
  }

  .scale-analyser__picker {
    grid-template-columns: repeat(4, 1fr);
  }

  .scale-analyser__actions {
    flex-wrap: wrap;
  }

  .scale-analyser__status {
    width: 100%;
    margin: 3px 0 0;
  }
}

/* Fretboard control panel — card-based workspace */
.fretboard-panel__controls {
  position: relative;
  padding: clamp(1rem, 2vw, 1.5rem);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  background: #000;
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.fretboard-controls-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.15rem;
}

.fretboard-controls-heading__eyebrow {
  margin: 0 0 0.3rem;
  color: #f6c24a;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.fretboard-controls-heading .fretboard-panel__title {
  margin: 0;
  color: #f7f7f5;
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  font-weight: 750;
  letter-spacing: -0.035em;
  text-transform: none;
}

.fretboard-controls-heading__copy {
  max-width: 30rem;
  margin: 0 0 0.1rem;
  color: rgba(255, 255, 255, 0.53);
  font-size: 0.85rem;
  line-height: 1.45;
  text-align: right;
}

.fretboard-panel__controls .fretboard-tuning-control {
  display: grid;
  grid-template-columns: minmax(9rem, 0.7fr) minmax(16rem, 1.7fr);
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.035);
}

.fretboard-panel__controls .fretboard-tuning-control__label {
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.fretboard-panel__controls .fretboard-tuning-control__label::after {
  content: "Instrument setup";
  display: block;
  margin-top: 0.22rem;
  color: rgba(255, 255, 255, 0.34);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.fretboard-panel__controls .fretboard-tuning-select {
  width: 100%;
  min-height: 46px;
  border-radius: 9px !important;
  background-color: #0b0d0f;
}

.fretboard-panel__controls .fretboard-controls {
  gap: 0.7rem;
  padding: 0;
  border: 0;
}

.fretboard-panel__controls .fretboard-controls .note-location-menu,
.fretboard-panel__controls .fretboard-controls .note-location-menu:last-child {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  align-content: start;
  gap: 0.65rem;
  min-height: 220px;
  padding: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.fretboard-panel__controls .fretboard-controls .note-location-menu:hover {
  border-color: rgba(246, 194, 74, 0.32);
  background: rgba(255, 255, 255, 0.045);
  transform: translateY(-2px);
}

.fretboard-panel__controls .note-location-menu > [data-action$="center"],
.fretboard-panel__controls .note-location-menu > [data-action="note-location"] {
  position: relative;
  min-height: 2.4rem;
  padding: 0 0 0.75rem 2.25rem;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: transparent;
  color: #f3f3f1;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.055em;
  text-align: left;
  text-transform: uppercase;
}

.fretboard-panel__controls .note-location-menu > [data-action$="center"]::before,
.fretboard-panel__controls .note-location-menu > [data-action="note-location"]::before {
  position: absolute;
  top: -0.2rem;
  left: 0;
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border: 1px solid rgba(246, 194, 74, 0.36);
  border-radius: 7px;
  background: rgba(246, 194, 74, 0.1);
  color: #f6c24a;
  font-size: 0.68rem;
}

.fretboard-panel__controls .note-location-menu:nth-child(1) > button:first-child::before { content: "01"; }
.fretboard-panel__controls .note-location-menu:nth-child(2) > button:first-child::before { content: "02"; }
.fretboard-panel__controls .note-location-menu:nth-child(3) > button:first-child::before { content: "03"; }
.fretboard-panel__controls .note-location-menu:nth-child(4) > button:first-child::before { content: "04"; }
.fretboard-panel__controls .note-location-menu:nth-child(5) > button:first-child::before { content: "05"; }

.fretboard-panel__controls .note-location-menu .form-select,
.fretboard-panel__controls .note-location-menu .btn-group .btn,
.fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
  min-height: 42px;
  border-radius: 8px;
}

.fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
  align-self: end;
  margin-top: auto;
  border-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.fretboard-panel__controls .note-location-menu > [data-action^="clear"]:hover {
  border-color: rgba(246, 194, 74, 0.38);
  background: rgba(246, 194, 74, 0.08);
  color: #f8cf72;
}

@media (max-width: 991.98px) {
  .fretboard-controls-heading {
    align-items: start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .fretboard-controls-heading__copy { text-align: left; }

  .fretboard-panel__controls .fretboard-controls .note-location-menu,
  .fretboard-panel__controls .fretboard-controls .note-location-menu:last-child {
    min-height: 0;
  }
}

@media (max-width: 575.98px) {
  .fretboard-panel__controls { border-radius: 12px; }

  .fretboard-panel__controls .fretboard-tuning-control {
    display: flex;
    align-items: stretch;
    flex-direction: column;
    gap: 0.55rem;
  }
}

/* Scale analyser: align with the chord tool's final flat visual language. */
.scale-tool-toolbar {
  display: block;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid rgba(246, 194, 74, 0.72);
  background: transparent;
}

.scale-tool-mode-toggle {
  display: flex;
  width: min(100%, 560px);
  min-width: 0;
  gap: 0;
  margin-inline: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.scale-tool-mode-toggle .btn {
  flex: 1 1 0;
  min-width: 0;
  min-height: 48px;
  padding: 0.65rem 1rem;
  border-width: 0 1px;
  border-color: rgba(255, 255, 255, 0.12);
  border-radius: 0 !important;
  background: transparent;
  box-shadow: none;
}

.scale-tool-mode-toggle .btn:hover,
.scale-tool-mode-toggle .btn:focus-visible {
  border-color: rgba(246, 194, 74, 0.3);
  background: rgba(246, 194, 74, 0.07);
  color: #ffd365;
  box-shadow: none;
}

.scale-tool-mode-toggle .btn.is-selected {
  color: #ffd365;
  border-color: rgba(246, 194, 74, 0.3);
  background: rgba(246, 194, 74, 0.14);
  box-shadow: inset 0 -2px 0 #f6c24a;
}

.scale-analyser {
  width: 100%;
  margin: 0;
  padding: 1.25rem clamp(0.75rem, 2vw, 1.35rem) 1.6rem;
  border: 0;
  border-radius: 0;
  background: #0b0b0b;
  box-shadow: none;
}

.scale-analyser__heading {
  padding: 0 0 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.scale-analyser__heading h2 {
  color: #f7f3ea;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 700;
}

.scale-analyser__heading > div > p:last-child {
  max-width: 820px;
  margin-top: 0.45rem;
  color: rgba(255, 255, 255, 0.66);
  line-height: 1.55;
}

.scale-analyser__eyebrow,
.scale-match-tier__label {
  margin-bottom: 0.35rem;
  color: #f6c24a;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.scale-analyser__count,
.scale-match-tier__count {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #f6c24a;
  font-size: 0.82rem;
  font-weight: 700;
}

.scale-analyser__picker {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0;
  margin-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.scale-note-option {
  min-width: 0;
  min-height: 54px;
  padding: 0.55rem 0.3rem;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.82);
  font: inherit;
  font-size: clamp(0.72rem, 0.88vw, 0.88rem);
  font-weight: 700;
  line-height: 1.1;
  white-space: nowrap;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.scale-note-option:last-child {
  border-right: 0;
}

.scale-note-option:hover,
.scale-note-option:focus-visible {
  border-color: rgba(255, 255, 255, 0.11);
  background: rgba(246, 194, 74, 0.08);
  color: #ffd365;
  outline: none;
}

.scale-note-option.is-selected {
  border-color: rgba(255, 255, 255, 0.11);
  background: rgba(246, 194, 74, 0.16);
  color: #ffd365;
  box-shadow: inset 0 -2px 0 #f6c24a;
}

.scale-note-option:disabled {
  opacity: 0.3;
  background: transparent;
  cursor: not-allowed;
}

.scale-note-option__alt {
  display: inline;
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  color: inherit;
}

.scale-note-option__slash {
  margin-inline: 0.08em;
  color: rgba(255, 255, 255, 0.38);
  font-weight: 400;
}

.scale-analyser__actions {
  min-height: 58px;
  margin-top: 0;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.scale-analyser__actions .btn {
  min-height: 38px;
  border-radius: 0 !important;
  box-shadow: none !important;
}

.scale-analyser__actions [data-action="analyse-scale-notes"]:not(:disabled) {
  border-color: #efd58c;
  background: #d2a449;
  color: #171109;
  font-weight: 800;
}

.scale-analyser__actions [data-action="analyse-scale-notes"]:not(:disabled):hover,
.scale-analyser__actions [data-action="analyse-scale-notes"]:not(:disabled):focus-visible {
  background: #e0b65d;
  color: #171109;
}

.scale-analyser__status {
  color: rgba(255, 255, 255, 0.58);
}

.scale-analyser__results {
  gap: 0;
  margin-top: 1.35rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.scale-match-tier {
  padding: 1.15rem 0 1.35rem;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 0;
  background: transparent;
}

.scale-match-tier--exact {
  border-color: rgba(246, 194, 74, 0.42);
  background: transparent;
}

.scale-match-tier__heading h3 {
  color: #f7f3ea;
  font-size: 1.05rem;
}

.scale-match-tier__intro {
  margin-top: 0.35rem;
}

.scale-match-list {
  gap: 0;
  margin-top: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.scale-match-card {
  grid-template-columns: minmax(190px, 0.7fr) minmax(260px, 1.3fr) auto;
  gap: 1rem;
  min-height: 54px;
  padding: 0.7rem 0.25rem;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0;
  background: transparent;
}

.scale-match-card__name {
  color: #f7f3ea;
}

.scale-match-card__notes {
  color: rgba(255, 255, 255, 0.7);
}

.scale-match-card__extra {
  color: #d6a441;
  font-size: 0.8rem;
  font-weight: 700;
}

.scale-match-empty {
  padding: 0.85rem 0.25rem 0;
}

/* Fretboard FAQs: use the same flat accordion language as the chord page. */
.fretboard-faq {
  margin: 0;
  padding: 0;
  background: #0b0b0b;
}

.fretboard-faq + .fretboard-faq {
  margin-top: 0;
}

.fretboard-faq__card {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

#faq-keys .fretboard-faq__card {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.fretboard-faq__summary {
  position: relative;
  display: flex;
  min-height: 64px;
  align-items: center;
  margin: 0;
  padding: 1rem 3rem 1rem 3.7rem;
  border: 0;
  color: #f7f3ea;
  cursor: pointer;
}

.fretboard-faq__summary::before {
  position: absolute;
  left: 0.5rem;
  color: #d6a441;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

#faq-keys .fretboard-faq__summary::before { content: "01"; }
#faq-filters .fretboard-faq__summary::before { content: "02"; }

.fretboard-faq__summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 0.5rem;
  bottom: auto;
  left: auto;
  width: auto;
  height: auto;
  background: transparent;
  filter: none;
  color: #d6a441;
  font-size: 1.55rem;
  font-weight: 300;
  line-height: 1;
  opacity: 1;
  transform: translateY(-50%);
}

.fretboard-faq__details[open] .fretboard-faq__summary::after {
  content: "\2212";
}

.fretboard-faq__summary:hover,
.fretboard-faq__summary:focus-visible,
.fretboard-faq__summary:hover .fretboard-faq__summary-title {
  color: #d6a441 !important;
  outline: none;
}

.fretboard-faq__summary-title,
.fretboard-faq__card h2 {
  margin: 0;
  padding: 0;
  color: inherit !important;
  font-size: clamp(0.9rem, 1.25vw, 1rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
  text-wrap: wrap;
}

.fretboard-faq__summary-hint {
  display: none;
}

.fretboard-faq__content {
  padding: 0 2rem 1.5rem;
}

.fretboard-faq__intro,
.fretboard-faq__rules {
  max-width: none;
  margin: 1rem 0 0;
  padding: 0;
  border: 0 !important;
  border-radius: 0;
  background: transparent !important;
  box-shadow: none;
}

.fretboard-faq__content > .fretboard-faq__rules:nth-child(n) {
  border-color: transparent;
  background: transparent;
}

.fretboard-faq__card p,
.fretboard-faq__card li {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
  line-height: 1.65;
}

.fretboard-faq__lead {
  color: rgba(255, 255, 255, 0.88) !important;
  font-size: 0.95rem;
  font-weight: 400;
}

.fretboard-faq__rules-title,
.fretboard-faq__topic-title {
  margin-top: 1.5rem !important;
  color: #d6a441 !important;
  font-size: 1rem !important;
  font-weight: 700;
}

.fretboard-faq__step {
  display: none;
}

@media (max-width: 991.98px) {
  .scale-analyser__picker {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .scale-note-option:nth-child(6n) {
    border-right: 0;
  }

  .scale-note-option:nth-child(n + 7) {
    border-top: 1px solid rgba(255, 255, 255, 0.11);
  }

  .scale-match-card {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .scale-match-card__extra {
    text-align: left;
  }
}

@media (max-width: 600px) {
  .scale-analyser {
    width: 100%;
    padding: 1rem 0.75rem 1.35rem;
  }

  .scale-analyser__heading {
    display: block;
  }

  .scale-analyser__count {
    display: block;
    margin-top: 0.65rem;
  }

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

  .scale-note-option:nth-child(6n) {
    border-right: 1px solid rgba(255, 255, 255, 0.11);
  }

  .scale-note-option:nth-child(4n) {
    border-right: 0;
  }

  .scale-note-option:nth-child(n + 5) {
    border-top: 1px solid rgba(255, 255, 255, 0.11);
  }

  .scale-analyser__actions {
    align-items: stretch;
  }

  .scale-analyser__actions .btn {
    flex: 1 1 auto;
  }

  .scale-analyser__status {
    flex-basis: 100%;
  }

  .fretboard-faq__summary {
    padding-left: 2.8rem;
    padding-right: 2.2rem;
  }

  .fretboard-faq__content {
    padding: 0 1.2rem 1.35rem 2.8rem;
  }
}

/* Scale analyser tone selector refinement */
.scale-analyser__picker {
  gap: 0.45rem;
  border-top: 0;
  border-bottom: 0;
}

.scale-note-option {
  position: relative;
  min-height: 62px;
  padding: 0.6rem 0.45rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: #111;
  color: rgba(255, 255, 255, 0.9);
  overflow: hidden;
}

.scale-note-option::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: transparent;
}

.scale-note-option--natural {
  background: #151515;
}

.scale-note-option--accidental {
  background: #0d0d0d;
  color: rgba(255, 255, 255, 0.78);
}

.scale-note-option__main {
  display: block;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.scale-note-option--accidental .scale-note-option__main {
  font-size: 0.82rem;
  font-weight: 700;
}

.scale-note-option:hover,
.scale-note-option:focus-visible {
  border-color: rgba(246, 194, 74, 0.55);
  background: #18140b;
}

.scale-note-option.is-selected {
  border-color: #f6c24a;
  background: #1b160b;
  color: #ffd365;
  box-shadow: none;
}

.scale-note-option.is-selected::before {
  background: #f6c24a;
}

.scale-note-option__slash {
  color: rgba(246, 194, 74, 0.62);
  font-weight: 600;
}

@media (max-width: 991.98px) {
  .scale-note-option:nth-child(6n),
  .scale-note-option:nth-child(4n) {
    border-right: 1px solid rgba(255, 255, 255, 0.14);
  }
  .scale-note-option:nth-child(n + 7),
  .scale-note-option:nth-child(n + 5) {
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }
}

/* Alternate tuning control */
.fretboard-tuning-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.fretboard-tuning-control__label {
  flex: 0 0 auto;
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.fretboard-tuning-select {
  width: min(100%, 360px);
  min-height: 38px;
  padding: 0.45rem 2.2rem 0.45rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 0 !important;
  background-color: #101010;
  color: #fff;
  box-shadow: none !important;
  font-weight: 650;
}

.fretboard-tuning-select:hover,
.fretboard-tuning-select:focus {
  border-color: rgba(246, 194, 74, 0.72);
}

@media (max-width: 575.98px) {
  .fretboard-tuning-control {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .fretboard-tuning-select {
    width: 100%;
  }
}

/* Keep the redesigned tuning row above the legacy tuning defaults. */
.fretboard-panel__controls .fretboard-tuning-control {
  display: grid;
  grid-template-columns: minmax(9rem, 0.7fr) minmax(16rem, 1.7fr);
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.035);
}

.fretboard-panel__controls .fretboard-tuning-select {
  width: 100%;
  min-height: 46px;
  border-radius: 9px !important;
  background-color: #0b0d0f;
}

@media (max-width: 575.98px) {
  .fretboard-panel__controls .fretboard-tuning-control {
    display: flex;
    align-items: stretch;
    flex-direction: column;
    gap: 0.55rem;
  }
}

/* Final cascade layer for the visualiser cards. */
.fretboard-panel__controls > .fretboard-controls {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
  padding: 0;
  border: 0;
}

.fretboard-panel__controls > .fretboard-controls > .note-location-menu,
.fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  align-content: start;
  gap: 0.65rem;
  min-height: 220px;
  padding: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  box-shadow: none;
}

.fretboard-panel__controls > .fretboard-controls > .note-location-menu:hover {
  border-color: rgba(246, 194, 74, 0.32);
  background: rgba(255, 255, 255, 0.045);
  transform: translateY(-2px);
}

.fretboard-panel__controls .note-location-menu > button:first-child {
  position: relative;
  min-height: 2.4rem;
  padding: 0 0 0.75rem 2.25rem;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0;
  background: transparent;
  color: #f3f3f1;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.055em;
  text-align: left;
  text-transform: uppercase;
}

.fretboard-panel__controls .note-location-menu > button:first-child::before {
  position: absolute;
  top: -0.2rem;
  left: 0;
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border: 1px solid rgba(246, 194, 74, 0.36);
  border-radius: 7px;
  background: rgba(246, 194, 74, 0.1);
  color: #f6c24a;
  font-size: 0.68rem;
}

.fretboard-panel__controls .note-location-menu:nth-child(1) > button:first-child::before { content: "01"; }
.fretboard-panel__controls .note-location-menu:nth-child(2) > button:first-child::before { content: "02"; }
.fretboard-panel__controls .note-location-menu:nth-child(3) > button:first-child::before { content: "03"; }
.fretboard-panel__controls .note-location-menu:nth-child(4) > button:first-child::before { content: "04"; }
.fretboard-panel__controls .note-location-menu:nth-child(5) > button:first-child::before { content: "05"; }

@media (min-width: 992px) and (max-width: 1250px) {
  .fretboard-panel__controls > .fretboard-controls {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 991.98px) {
  .fretboard-panel__controls > .fretboard-controls {
    display: block;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    min-height: 0;
  }
}

/* Screenshot-matched desktop controls: open columns with fine dividers. */
@media (min-width: 992px) {
  .fretboard-panel__controls {
    padding: 1.25rem 1.5rem 1rem;
    border-radius: 16px;
  }

  .fretboard-panel__controls .fretboard-controls-heading {
    align-items: center;
    margin: 0;
    padding: 0 0 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .fretboard-panel__controls .fretboard-tuning-control {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 1rem;
    margin: 0 0 1rem;
    padding: 0.8rem 0;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 0;
    background: transparent;
  }

  .fretboard-panel__controls .fretboard-tuning-select {
    min-height: 44px;
    padding-inline: 1rem 2.5rem;
    border-radius: 6px !important;
    background-color: rgba(255, 255, 255, 0.025);
    font-size: 1rem;
  }

  .fretboard-panel__controls > .fretboard-controls {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    padding: 0 0 0.85rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    display: flex;
    min-height: 205px;
    padding: 0 1rem;
    border: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    transform: none;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:first-child {
    padding-left: 0.25rem;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    padding-right: 0.25rem;
    border-right: 0;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:hover {
    border-color: rgba(255, 255, 255, 0.14);
    background: transparent;
    transform: none;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child {
    min-height: auto;
    margin: 0 0 0.7rem;
    padding: 0;
    border: 0;
    background: transparent;
    color: rgba(255, 255, 255, 0.92);
    font-size: 0.78rem;
    letter-spacing: 0.075em;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child::before {
    content: none !important;
    display: none;
  }

  .fretboard-panel__controls .note-location-menu .form-select {
    min-height: 44px;
    padding-inline: 0.9rem 2.4rem;
    border-radius: 6px;
    background-color: rgba(255, 255, 255, 0.025);
  }

  .fretboard-panel__controls .note-location-menu .btn-group {
    min-height: 44px;
  }

  .fretboard-panel__controls .note-location-menu .btn-group .btn,
  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    border-radius: 5px;
  }

  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    min-height: 44px;
    margin-top: auto;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.78rem;
  }
}

/* Final embedded fretboard treatment. */
.fretboard-panel {
  gap: 0;
}

.fretboard-panel__display {
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #000;
  box-shadow: none;
}

.fretboard-panel__display .fretboard-key-strip {
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.fretboard-panel__display .fretboard-key-strip:has(.fretboard-interval-formula:empty) {
  display: none;
}

.fretboard-panel__display .fretboard-canvas-wrap {
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.fretboard-panel__display .fretboard-canvas {
  padding: 0;
}

@media (min-width: 992px) {
  .fretboard-panel__controls {
    padding-bottom: 0;
  }

  .fretboard-panel__controls > .fretboard-controls {
    padding-bottom: 0.5rem;
  }
}

/* Final control proportions. */
@media (min-width: 992px) {
  .fretboard-panel__controls {
    border: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .fretboard-panel__controls .fretboard-tuning-control {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 12px;
    margin-bottom: 6px;
    padding: 4px 0 8px;
  }

  .fretboard-panel__controls .fretboard-tuning-control__label {
    font-size: 10px;
    letter-spacing: 0.09em;
  }

  .fretboard-panel__controls .fretboard-tuning-control__label::after {
    display: none;
  }

  .fretboard-panel__controls .fretboard-tuning-select {
    height: 34px;
    min-height: 34px;
    padding: 4px 30px 4px 11px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px !important;
    background-color: #080909;
    background-size: 12px 9px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.1;
  }

  .fretboard-panel__controls > .fretboard-controls > .note-location-menu,
  .fretboard-panel__controls > .fretboard-controls > .note-location-menu:last-child {
    min-height: 118px;
    gap: 6px;
    padding-inline: 12px;
  }

  .fretboard-panel__controls .note-location-menu > button:first-child {
    margin: 0 0 5px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 10px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.09em;
  }

  .fretboard-panel__controls .note-location-menu .form-select {
    height: 34px;
    min-height: 34px;
    padding: 4px 30px 4px 11px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px;
    background-color: #080909;
    background-size: 12px 9px;
    color: rgba(255, 255, 255, 0.86);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.1;
  }

  .fretboard-panel__controls .note-location-menu .btn-group {
    min-height: 32px;
    height: 32px;
  }

  .fretboard-panel__controls .note-location-menu .btn-group .btn {
    min-height: 32px;
    padding: 2px 10px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 650;
  }

  .fretboard-panel__controls .note-location-menu > [data-action^="clear"] {
    width: max-content;
    min-width: 0;
    min-height: 28px;
    height: 28px;
    margin-top: 2px;
    padding: 2px 9px;
    border-color: rgba(255, 255, 255, 0.09);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.025);
    color: rgba(255, 255, 255, 0.48);
    font-size: 10px;
    font-weight: 650;
    letter-spacing: 0.04em;
  }
}

/* Match the chord page: one continuous, near-black paisley surface. */
body {
  background-color: #020202;
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.9)),
    url("../images/backgrounds/paisley2.webp");
  background-position: center top;
  background-size: auto, 1920px auto;
  background-repeat: repeat, repeat-y;
  background-attachment: fixed, fixed;
}

.fretboard-page-intro,
.fretboard-page-intro__inner,
main,
.fretboard-lab,
.fretboard-shell,
.fretboard-panel,
.fretboard-panel__controls,
.fretboard-panel__display,
.scale-tool-toolbar,
.scale-analyser,
.fretboard-canvas-wrap,
.fretboard-key-strip {
  background-color: transparent;
  background-image: none;
}

.fretboard-page-intro__inner::before,
.fretboard-lab::before,
.fretboard-lab::after,
.fretboard-shell::before {
  background: none;
  opacity: 0;
}

.fretboard-panel__controls,
.fretboard-panel__display,
.fretboard-shell,
.scale-analyser,
.fretboard-canvas-wrap {
  box-shadow: none;
}

.site-footer,
.site-footer .audio-visualizer--footer {
  background: transparent !important;
  background-image: none !important;
}

.site-footer::before,
.site-footer .audio-visualizer--footer::before,
.site-footer .audio-visualizer--footer::after {
  content: none;
  background: none !important;
  opacity: 0 !important;
}

.fretboard-page-intro h1 {
  color: #f6c24a;
}

.fretboard-scale-category {
  margin: 0;
  color: rgba(246, 194, 74, 0.78);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
}

.fretboard-faq--current {
  padding: clamp(1.5rem, 3vw, 2.75rem) clamp(1rem, 4vw, 3rem);
  background: transparent;
}

.fretboard-faq--current .fretboard-faq__card {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  counter-reset: fretboard-faq-item;
}

.fretboard-faq--current .fretboard-faq__card > h2 {
  margin: 0 0 1.15rem;
  color: #f6c24a !important;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  letter-spacing: 0.01em;
}

.fretboard-faq--current .fretboard-faq__details {
  counter-increment: fretboard-faq-item;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(11, 11, 11, 0.34);
}

.fretboard-faq--current .fretboard-faq__details:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.fretboard-faq--current .fretboard-faq__details[open] {
  border-color: rgba(214, 164, 65, 0.62);
}

.fretboard-faq--current .fretboard-faq__summary {
  position: relative;
  min-height: 64px;
  margin: 0;
  padding: 1rem 3rem 1rem 3.7rem;
  color: #f7f3ea;
}

.fretboard-faq--current .fretboard-faq__summary::before {
  content: counter(fretboard-faq-item, decimal-leading-zero);
  position: absolute;
  left: 0.5rem;
  color: #d6a441;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.fretboard-faq--current .fretboard-faq__summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 0.5rem;
  left: auto;
  width: auto;
  height: auto;
  background: transparent;
  filter: none;
  color: #d6a441;
  font-size: 1.55rem;
  font-weight: 300;
  line-height: 1;
  opacity: 1;
  transform: translateY(-50%);
}

.fretboard-faq--current .fretboard-faq__details[open] .fretboard-faq__summary::after {
  content: "\2212";
}

.fretboard-faq--current .fretboard-faq__summary:hover,
.fretboard-faq--current .fretboard-faq__summary:focus-visible,
.fretboard-faq--current .fretboard-faq__summary:hover .fretboard-faq__summary-title {
  color: #d6a441 !important;
  outline: none;
}

.fretboard-faq--current .fretboard-faq__summary-title {
  color: inherit !important;
  font-size: clamp(0.9rem, 1.25vw, 1rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
  text-wrap: wrap;
}

.fretboard-faq--current .fretboard-faq__content {
  max-width: 86ch;
  padding: 0 2rem 1.5rem;
}

.fretboard-faq--current .fretboard-faq__content p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1rem;
  line-height: 1.65;
}

@media (max-width: 600px) {
  .fretboard-faq--current .fretboard-faq__summary {
    padding-left: 2.8rem;
    padding-right: 2.2rem;
  }

  .fretboard-faq--current .fretboard-faq__content {
    padding: 0 1.2rem 1.35rem 2.8rem;
  }
}

.fretboard-faq__inline-link {
  color: #f6c24a;
  text-underline-offset: 0.16em;
}

/* Scale relationships and comparison */
[data-fretboard-canvas-wrap][hidden],
.fretboard-tuning-control[hidden],
.fretboard-relationship-info[hidden],
.fretboard-compare[hidden],
.fretboard-compare__select-wrap[hidden],
.fretboard-comparison-summary[hidden] {
  display: none !important;
}

.fretboard-relationship-info {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.94rem;
}

.fretboard-panel__display .fretboard-key-strip {
  gap: 0.55rem;
  padding-top: 0.9rem;
  padding-bottom: 0.4rem;
}

.fretboard-relationship-info p {
  margin: 0;
}

.fretboard-relationship-info strong {
  color: #d6a441;
  font-weight: 700;
}

.fretboard-scale-notes {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(0.9rem, 1.2vw, 1rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
}

.fretboard-scale-notes[hidden] {
  display: none !important;
}

.fretboard-compare {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.45rem 0.65rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.fretboard-compare__toggle,
.fretboard-compare__select-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.fretboard-compare__toggle {
  cursor: pointer;
}

.fretboard-compare__toggle input {
  width: 1rem;
  height: 1rem;
  margin: 0;
  accent-color: #d6a441;
}

.fretboard-compare__select-wrap .form-select {
  width: min(18rem, 46vw);
  min-height: 32px;
  padding-block: 0.25rem;
  font-size: 0.78rem;
}

.fretboard-compare__tutorial {
  min-height: 32px;
  padding: 0.3rem 0.75rem;
  border-color: rgba(214, 164, 65, 0.6);
  color: #f6c24a;
  font-size: 0.72rem;
  font-weight: 800;
}

.fretboard-comparison-summary {
  max-width: 72rem;
  margin: 0.25rem auto 0.8rem;
  padding: 0.75rem 1rem 0.9rem;
  border-block: 1px solid rgba(214, 164, 65, 0.22);
}

.fretboard-comparison-summary h3 {
  margin: 0;
  color: #f6c24a;
  font-size: 1rem;
  text-align: center;
}

.fretboard-comparison-table-wrap {
  margin-top: 0.7rem;
  overflow-x: auto;
  scrollbar-color: rgba(214, 164, 65, 0.55) rgba(255, 255, 255, 0.05);
}

.fretboard-comparison-table-wrap h4 {
  margin: 0 0 0.3rem;
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.fretboard-comparison-table {
  width: 100%;
  min-width: 35rem;
  border-collapse: separate;
  border-spacing: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.78rem;
  text-align: center;
}

.fretboard-comparison-table th,
.fretboard-comparison-table td {
  min-width: 3.2rem;
  padding: 0.42rem 0.55rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.fretboard-comparison-table tr:last-child th,
.fretboard-comparison-table tr:last-child td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.fretboard-comparison-table th {
  position: sticky;
  left: 0;
  z-index: 1;
  min-width: 10rem;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  background: #090a0a;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 700;
  text-align: left;
}

.fretboard-comparison-table thead th {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.fretboard-comparison-table thead .fretboard-comparison-table__degree {
  position: static;
  min-width: 3.2rem;
  border-left: 0;
  background: rgba(255, 255, 255, 0.025);
  text-align: center;
}

.fretboard-comparison-table td.is-changed {
  border-top-color: rgba(246, 194, 74, 0.72);
  background: rgba(214, 164, 65, 0.15);
  color: #fff;
  font-weight: 800;
}

.fretboard-comparison-table tr:last-child td.is-changed {
  border-bottom: 2px solid #d6a441;
}

.fretboard-comparison-explanation {
  margin: 0.75rem 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
}

@media (max-width: 600px) {
  .fretboard-compare {
    align-items: stretch;
    flex-direction: column;
  }

  .fretboard-compare__select-wrap {
    align-items: stretch;
    flex-direction: column;
  }

  .fretboard-compare__select-wrap .form-select {
    width: 100%;
  }

  .fretboard-relationship-info {
    align-items: center;
    flex-direction: column;
  }

  .fretboard-comparison-summary {
    padding-inline: 0.55rem;
  }

  .fretboard-comparison-table {
    font-size: 0.74rem;
  }
}

/* Static, task-focused guidance placed after the interactive tool. */
.fretboard-tool-guide {
  padding: clamp(2.25rem, 5vw, 4.5rem) clamp(1rem, 4vw, 2.5rem);
  border-block: 1px solid rgba(246, 194, 74, 0.24);
  background: rgba(4, 4, 4, 0.62);
}

.fretboard-tool-guide .tool-guide__inner { width: min(100%, 900px); margin: 0 auto; }
.fretboard-tool-guide h2, .fretboard-tool-guide h3, .fretboard-tool-guide h4 { font-family: "Cal Sans", system-ui, sans-serif; }
.fretboard-tool-guide h2 { color: #f6c24a; font-size: clamp(1.75rem, 3.2vw, 2.45rem); margin: 0 0 1rem; }
.fretboard-tool-guide h3 { color: #f6c24a; font-size: clamp(1.25rem, 2vw, 1.55rem); margin: 2rem 0 0.7rem; }
.fretboard-tool-guide h4 { color: #f6c24a; font-size: 1rem; margin: 1.2rem 0 0.35rem; }
.fretboard-tool-guide p { max-width: 76ch; color: rgba(255, 255, 255, 0.84); line-height: 1.7; margin: 0 0 0.9rem; }
.fretboard-tool-guide a { color: #ffd365; font-weight: 700; }