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

    body,
    button,
    input,
    select,
    textarea {
      font-family: "Cal Sans", sans-serif;
    }

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

    .fretboard-shell {
      max-width: none;
      width: 100%;
      margin: 0;
      padding: 0;
      border-radius: 0;
      position: relative;
      overflow: hidden;
      isolation: auto;
      background: transparent;
      border: none;
      box-shadow: none;
      backdrop-filter: none;
    }

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

    .fretboard-shell::after {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: 0;
      border: none;
      box-shadow: none;
      pointer-events: none;
      z-index: 0;
    }

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

    .fretboard-lab::after {
      content: "";
      position: absolute;
      inset: 0;
      background: none;
      opacity: 0;
      pointer-events: none;
      z-index: 0;
    }
    .fretboard-shell,
    .fretboard-head,
    .fretboard-controls {
      position: relative;
      z-index: 1;
    }

    .fretboard-shell > * {
      position: relative;
      z-index: 1;
    }
.fretboard-head {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      margin-bottom: 1.5rem;
    }

    .fretboard-page-intro {
      padding: 0;
      background-color: #0b0b0b;
    }

    .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: #0b0b0b;
      box-shadow: none;
      overflow: hidden;
      isolation: auto;
    }

    .fretboard-page-intro__inner::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url("../images/backgrounds/paisley2.webp");
      background-size: 1920px auto;
      background-repeat: repeat-y;
      background-position: center top;
      background-attachment: fixed;
      opacity: 0.32;
      mix-blend-mode: normal;
      filter: none;
      pointer-events: none;
      z-index: 0;
    }
    .fretboard-page-intro__inner > * {
      position: relative;
      z-index: 1;
    }

    .fretboard-page-intro__inner > .fretboard-hero {
      justify-items: center;
      text-align: center;
    }

    .fretboard-page-intro__inner > .fretboard-hero .fretboard-hero__left {
      margin: 0 auto;
    }

    .fretboard-page-intro h1 {
      position: relative;
      isolation: auto;
      margin: 0 0 0.75rem;
      font-size: clamp(2.05rem, 3.2vw, 42px);
      line-height: 1.12;
      letter-spacing: 0.01em;
      color: #f6f1e7;
      text-align: center;
      text-wrap: balance;
      opacity: 1;
      transform: none;
      animation: none;
      padding-bottom: 0;
      background-image: none;
    }

    .fretboard-page-intro h1::after {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      width: 0;
      height: 0;
      background: none;
      filter: none;
      opacity: 0;
      z-index: 0;
      pointer-events: none;
    }

    .fretboard-intro-toggle {
      display: none;
      margin-bottom: 0.9rem;
      border-radius: 999px;
      padding: 0.42rem 0.85rem;
      font-size: 0.84rem;
      letter-spacing: 0.03em;
      text-transform: uppercase;
    }

    .fretboard-intro-lead {
      position: relative;
      margin: 0 auto 1.35rem;
      max-width: 58ch;
      font-size: 14px;
      line-height: 1.95;
      color: rgba(246, 241, 231, 0.86);
      text-align: left;
      opacity: 1;
      transform: none;
      animation: none;
    }

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

    .fretboard-info-grid::before {
      content: "";
      position: absolute;
      inset: 0;
      background: none;
      opacity: 0;
      filter: none;
      pointer-events: none;
      z-index: 0;
    }

    .fretboard-info-card {
      position: relative;
      z-index: 1;
      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);
      backdrop-filter: none;
      opacity: 1;
      transform: none;
      animation: none;
      transition: transform 200ms ease, border-color 200ms ease;
      transform-origin: center;
    }

    .fretboard-info-card:first-child {
      transform: none;
      border-color: rgba(255, 215, 120, 0.25);
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
    }

    .fretboard-info-grid .fretboard-info-card:nth-child(1) { animation-delay: 0.05s; }
    .fretboard-info-grid .fretboard-info-card:nth-child(2) { animation-delay: 0.13s; }
    .fretboard-info-grid .fretboard-info-card:nth-child(3) { animation-delay: 0.21s; }
    .fretboard-info-grid .fretboard-info-card:nth-child(4) { animation-delay: 0.29s; }

    .fretboard-info-card:hover,
    .fretboard-info-card:focus-within {
      transform: translateY(-4px);
      border-color: rgba(255, 215, 120, 0.7);
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      filter: none;
    }

    .fretboard-info-card:focus-within {
      transform: translateY(-4px);
      border-color: rgba(255, 215, 120, 0.7);
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.6);
      filter: none;
    }

    @keyframes card-reveal {
      from {
        opacity: 0;
        transform: translateY(12px) scale(0.985);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .fretboard-page-intro h1,
      .fretboard-intro-lead,
      .faq__card,
      .fretboard-info-card {
        opacity: 1;
        transform: none;
        animation: none;
        transition: none;
      }
    }

    .fretboard-info-card--gold {
      background: #111111;
    }

    .fretboard-info-card--blue {
      background: #111111;
    }

    .fretboard-info-card--amber {
      background: #111111;
    }

    .fretboard-info-card--faq {
      background: #111111;
    }

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

    .fretboard-info-card--gold h3,
    .fretboard-info-card--blue h3,
    .fretboard-info-card--amber h3 {
      color: #f6c24a;
    }

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

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

    .fretboard-info-card .faq-prefix {
      color: #f6c24a;
    }

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

    .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: 0.35rem 0.4rem 0.4rem;
    }

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

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

    .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);
      opacity: 1;
      transform: none;
      animation: none;
    }

    #faq-chord-theory .faq__card {
      animation-delay: 0s;
    }

    #faq-filters .faq__card {
      animation-delay: 0s;
    }

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

    .faq__details {
      width: 100%;
    }

    .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;
    }

    .faq__summary::marker {
      content: "";
    }

    .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;
    }

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

    .faq__summary-title {
      margin: 0;
      padding: 0;
      border: 0;
      font-size: clamp(1.45rem, 2.9vw, 2.05rem);
      color: #f8cf72 !important;
      text-wrap: balance;
    }

    .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);
    }

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

    .faq__summary-hint::after {
      content: "";
      display: none;
    }

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

    .faq__details:not([open]) .faq__summary-hint::after {
      transform: none;
    }

    .faq__content {
      padding-top: 0.95rem;
    }

    .faq__details[open] .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);
      }
    }

    @keyframes section-fade-in {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

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

    .faq__intro {
      margin: 0 0 0.85rem;
      padding: 0.95rem 1rem 0.85rem;
      border: 1px solid rgba(246, 194, 74, 0.32);
      border-left: 3px solid rgba(246, 194, 74, 0.65);
      border-radius: 12px;
      background: rgba(24, 20, 14, 0.58);
    }

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

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

    .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);
    }

    .faq__content > .faq__rules:nth-child(5n + 2) {
      background: rgba(18, 14, 9, 0.35);
      border-color: rgba(246, 194, 74, 0.32);
      border-left-color: rgba(246, 194, 74, 0.65);
    }

    .faq__content > .faq__rules:nth-child(5n + 3) {
      background: rgba(18, 14, 9, 0.35);
      border-color: rgba(255, 255, 255, 0.14);
      border-left-color: rgba(246, 194, 74, 0.45);
    }

    .faq__content > .faq__rules:nth-child(5n + 4) {
      background: rgba(18, 14, 9, 0.35);
      border-color: rgba(246, 194, 74, 0.28);
      border-left-color: rgba(246, 194, 74, 0.58);
    }

    .faq__content > .faq__rules:nth-child(5n + 5) {
      background: rgba(18, 14, 9, 0.35);
      border-color: rgba(246, 194, 74, 0.32);
      border-left-color: rgba(246, 194, 74, 0.62);
    }

    .faq__content > .faq__rules:nth-child(5n + 1) {
      background: rgba(18, 14, 9, 0.35);
      border-color: rgba(246, 194, 74, 0.32);
      border-left-color: rgba(246, 194, 74, 0.62);
    }

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

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

    .faq__rules-title {
      margin: 0 0 0.65rem;
      display: flex;
      align-items: center;
      gap: 0.55rem;
      font-weight: 600;
      font-size: 1.02rem;
      color: #f8cf72;
      line-height: 1.35;
    }

    .faq__rules-title > span:not(.faq__step) {
      color: #f8cf72 !important;
    }

    .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);
    }

    .faq__rules-title--final {
      color: #f8cf72;
    }

    .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);
    }

    .faq__subsection {
      margin-top: 0.95rem;
      padding-top: 0.9rem;
      border-top: 1px solid rgba(246, 194, 74, 0.2);
    }

    .faq__subsection:first-of-type {
      margin-top: 0.2rem;
      padding-top: 0;
      border-top: 0;
    }

    .faq__card .faq__subheading {
      margin: 0 0 0.45rem;
      font-size: 0.76rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: #f8cf72;
      font-weight: 700;
      text-shadow: 0 0 10px rgba(246, 194, 74, 0.16);
    }

    #faq-chord-theory .faq__subheading,
    #faq-filters .faq__subheading {
      color: #f8cf72 !important;
    }

    .faq__subsection > p {
      max-width: 76ch;
      line-height: 1.72;
      margin: 0 0 0.78rem;
    }

    /* Add breathing room around standalone visual blocks in FAQ prose. */
    .faq__subsection > :is(
      .faq__interval-example,
      .faq__examples-table-wrap,
      .faq__interval-grid,
      .faq__interval-map-columns,
      .faq__connection-grid,
      .faq__triad-grid,
      .faq__triad-card
    ),
    .faq__rules > :is(
      .faq__interval-example,
      .faq__examples-table-wrap,
      .faq__interval-grid,
      .faq__interval-map-columns,
      .faq__connection-grid,
      .faq__triad-grid,
      .faq__triad-card
    ) {
      margin-top: 0.9rem;
      margin-bottom: 1.05rem;
    }

    .faq__subsection > :is(
      .faq__interval-example,
      .faq__examples-table-wrap,
      .faq__interval-grid,
      .faq__interval-map-columns,
      .faq__connection-grid,
      .faq__triad-grid,
      .faq__triad-card
    ) + p,
    .faq__rules > :is(
      .faq__interval-example,
      .faq__examples-table-wrap,
      .faq__interval-grid,
      .faq__interval-map-columns,
      .faq__connection-grid,
      .faq__triad-grid,
      .faq__triad-card
    ) + p {
      margin-top: 0.9rem;
    }

    .faq__accent {
      color: #f6c24a;
      font-weight: 700;
      text-shadow: 0 0 8px rgba(246, 194, 74, 0.12);
    }

    .faq__subsection .faq__rules-list {
      max-width: 74ch;
      margin-top: 0.12rem;
      margin-bottom: 0.82rem;
    }

    .faq__subsection .faq__interval-example {
      margin: 0.3rem 0 0.45rem;
    }

    .faq__subsection .faq__interval-grid {
      margin-top: 0.55rem;
    }

    .faq__examples-table-wrap {
      margin: 0.2rem 0 0.9rem;
      border: 1px solid rgba(246, 194, 74, 0.24);
      border-radius: 10px;
      background: rgba(20, 16, 11, 0.45);
      overflow-x: auto;
    }

    .faq__examples-table {
      width: 100%;
      min-width: 34rem;
      border-collapse: collapse;
      color: rgba(247, 242, 229, 0.95);
      font-size: 0.94rem;
    }

    .faq__examples-table th,
    .faq__examples-table td {
      padding: 0.55rem 0.65rem;
      border-bottom: 1px solid rgba(246, 194, 74, 0.15);
      text-align: left;
      white-space: nowrap;
    }

    .faq__examples-table th {
      color: #ffe9b9;
      font-weight: 700;
      font-size: 0.82rem;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      background: rgba(38, 29, 16, 0.55);
    }

    .faq__examples-table tbody tr:last-child td {
      border-bottom: 0;
    }

    .faq__examples-table-wrap--emphasis {
      margin-top: 0.32rem;
      border-color: rgba(246, 194, 74, 0.38);
      background: rgba(24, 20, 14, 0.66);
      box-shadow:
        0 10px 24px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 243, 214, 0.06);
    }

    .faq__examples-table-wrap--emphasis .faq__examples-table th {
      color: #fff0cf;
      background: rgba(48, 37, 19, 0.78);
      border-bottom-color: rgba(246, 194, 74, 0.3);
      text-shadow: 0 0 10px rgba(246, 194, 74, 0.2);
    }

    .faq__examples-table-wrap--emphasis .faq__examples-table td {
      border-bottom-color: rgba(246, 194, 74, 0.24);
      font-weight: 560;
    }

    .faq__examples-table-wrap--emphasis .faq__examples-table tbody tr:nth-child(odd) td {
      background: rgba(255, 236, 188, 0.025);
    }

    .faq__mapping-intro {
      margin-top: 1.2rem;
      margin-bottom: 0.72rem;
    }

    .faq__interval-example + .faq__mapping-intro {
      margin-top: 1.7rem;
    }

    .faq__interval-map-columns {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 0.65rem;
    }

    .faq__examples-table-wrap--compact {
      margin: 0;
    }

    .faq__rules--reference .faq__examples-table-wrap,
    .faq__rules--reference .faq__interval-grid {
      border-color: rgba(246, 194, 74, 0.34);
      background: rgba(24, 18, 11, 0.66);
    }

    .faq__rules--reference .faq__examples-table th {
      color: #fff0cf;
      background: rgba(44, 33, 18, 0.74);
    }

    .faq__rules--reference .faq__examples-table td {
      border-bottom-color: rgba(246, 194, 74, 0.22);
    }

    .faq__examples-table--compact {
      min-width: 0;
      font-size: 0.9rem;
    }

    .faq__examples-table--compact th,
    .faq__examples-table--compact td {
      padding: 0.5rem 0.58rem;
    }

    .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", sans-serif;
      letter-spacing: 0.01em;
      color: #ffe9b9;
      white-space: nowrap;
      overflow-x: auto;
    }
    .faq__interval-example {
      margin: 0.45rem 0 0.85rem;
    }

    .faq__interval-title {
      margin: 0 0 0.45rem;
      font-weight: 600;
      color: #f8cf72;
      text-shadow: 0 0 8px rgba(246, 194, 74, 0.14);
    }

    .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;
    }

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

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

    .faq__interval-row--two-octaves {
      min-width: 33rem;
      grid-template-columns: 6.25rem repeat(7, minmax(2rem, 1fr));
    }

    .faq__interval-row--two-octaves.faq__interval-row--intervals .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;
    }

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

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

    .faq__interval-row--chromatic.faq__interval-row--intervals .faq__interval-cell,
    .faq__interval-row--chromatic.faq__interval-row--semitones .faq__interval-cell,
    .faq__interval-row--chromatic.faq__interval-row--notes .faq__interval-cell {
      background: rgba(246, 194, 74, 0.08);
      border-color: rgba(246, 194, 74, 0.28);
      color: #ffecc2;
    }

    .faq__interval-row--chromatic.faq__interval-row--intervals .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);
    }

    .faq__interval-row--chromatic.faq__interval-row--semitones .faq__interval-cell {
      background: rgba(246, 194, 74, 0.12);
      border-color: rgba(246, 194, 74, 0.34);
      color: #ffe8b3;
      font-size: 0.84rem;
    }

    .faq__interval-row--chromatic.faq__interval-row--notes .faq__interval-cell {
      background: rgba(246, 194, 74, 0.08);
      border-color: rgba(246, 194, 74, 0.28);
      color: #ffecc2;
    }

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

    .faq__interval-row--chromatic.faq__interval-row--semitones .faq__interval-label {
      color: rgba(255, 233, 185, 0.92);
    }

    .faq__interval-row--chromatic.faq__interval-row--notes .faq__interval-label {
      color: rgba(255, 233, 185, 0.92);
    }

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

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

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

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

    .faq__interval-row--major-scale-intervals .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;
    }

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

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

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

    .faq__triad-grid--less-common-sevenths {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .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);
    }

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

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

    .faq__triad-card .faq__interval-grid {
      margin-top: 0.35rem;
    }

    .faq__formula-name {
      margin: 0 0 0.3rem;
      color: #f6c24a;
      font-weight: 700;
      line-height: 1.3;
    }

    .faq__formula-line {
      margin: 0.2rem 0 0;
      font-family: "Cal Sans", sans-serif;
      color: #f6c24a;
      font-weight: 700;
      letter-spacing: 0.01em;
    }

    .faq__interval-row--triad-compact {
      min-width: 0;
      grid-template-columns: 4.7rem repeat(3, minmax(1.75rem, 1fr));
    }

    .faq__interval-row--seventh-compact {
      min-width: 0;
      grid-template-columns: 4.7rem repeat(4, minmax(1.5rem, 1fr));
    }

    .faq__connection-grid {
      margin-top: 0.25rem;
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 0.7rem;
    }

    .faq__connection-card {
      padding: 0.75rem 0.8rem;
      border-radius: 11px;
      border: 1px solid rgba(246, 194, 74, 0.24);
      background: rgba(31, 24, 12, 0.42);
    }

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

    .faq__connection-card .faq__interval-grid {
      margin-top: 0.25rem;
    }

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

    .faq__interval-cell.is-target {
      color: #1b140a;
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      border-radius: 999px;
      padding: 0.12rem 0.2rem;
      box-shadow: inset 0 0 0 1px rgba(21, 18, 13, 0.35);
      font-weight: 700;
    }

    .faq__connection-hint {
      margin-top: 0.55rem;
      margin-bottom: 0;
      color: rgba(255, 240, 206, 0.94);
      font-size: 0.9rem;
    }

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

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

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

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

    /* The scale diagrams need a full card width: keeping them side by side at
       tablet widths leaves their interval columns clipped. */
    @media (max-width: 1100px) {
      .faq__connection-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 767.98px) {
      .faq__interval-map-columns {
        grid-template-columns: 1fr;
      }

      .faq__triad-grid--less-common-sevenths {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 991.98px) {
      .faq__triad-grid--less-common-sevenths {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .fretboard-shell {
        padding: 1.15rem 0.8rem;
      }

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

      .fretboard-mobile-view-switch {
        display: grid;
        width: 100%;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.35rem;
      }

      .fretboard-mobile-view-switch .btn {
        width: 100%;
        min-height: 42px;
        padding: 0.5rem 0.4rem;
        font-size: 0.8rem;
        border-radius: 10px;
        line-height: 1.1;
      }

      .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: 15px;
      }

      .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"] {
        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-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 #triad-overlay-layer .note-text,
      body.fretboard-fit-mobile #note-layer .note-text {
        display: block;
        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 rgba(255, 215, 120, 0.25);
      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;
    }

    .note-status-legend {
      display: inline-flex;
      align-items: center;
      gap: 0.65rem;
      font-size: 0.82rem;
      color: rgba(246, 241, 231, 0.9);
      line-height: 1.2;
      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: #c83b3b;
      border-color: rgba(255, 230, 230, 0.75);
    }

    .note-status-legend__dot--third {
      background: #2e9f55;
      border-color: rgba(221, 255, 231, 0.75);
    }

    .note-status-legend__dot--characteristic {
      background: #2f7be8;
      border-color: rgba(217, 232, 255, 0.78);
    }

    .note-status-legend__dot--fifth {
      background: #f6c24a;
      border-color: rgba(255, 240, 200, 0.82);
    }

    .note-location-menu .form-select {
      min-width: 150px;
      border-radius: 6px;
      padding: 0.35rem 2.1rem 0.35rem 0.9rem;
      background-color: #131313;
      color: #f6f1e7;
      border: 1px solid rgba(255, 215, 120, 0.25);
      box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.45);
    }

    .note-location-menu .form-select:focus {
      border-color: rgba(246, 194, 74, 0.8);
      box-shadow: 0 0 0 0.2rem rgba(246, 194, 74, 0.2);
    }

    .note-location-menu .form-select option {
      color: #f6f1e7;
      background-color: #131313;
    }

    .note-location-menu .btn,
    .note-location-menu .btn-group .btn {
      border-radius: 6px;
      letter-spacing: 0.02em;
      background-color: #131313;
      color: #ffffff;
      border-color: rgba(255, 215, 120, 0.4);
    }

    .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: #1a1a1a;
      color: #ffffff;
    }

    .note-location-menu .btn-check:checked + .btn,
    .note-location-menu .btn.is-selected,
    .note-location-menu .btn[aria-pressed="true"],
    .note-location-menu .btn.active {
      background: #f6c24a;
      color: #12131a;
      border-color: #f6c24a;
      box-shadow: inset 0 1px 0 rgba(255, 247, 226, 0.7), 0 4px 10px rgba(58, 39, 11, 0.3);
    }

    .fretboard-mobile-view-switch .btn,
    .fretboard-intro-toggle {
      background-color: #131313;
      color: #ffffff;
      border-color: rgba(255, 215, 120, 0.4);
    }

    .fretboard-mobile-view-switch .btn.is-selected {
      background: #f6c24a;
      color: #12131a;
      border-color: #f6c24a;
    }

    .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, 255, 255, 0.06);
      stroke: rgba(255, 255, 255, 0.22);
    }

    .fret-box.is-active {
      fill: rgba(40, 30, 18, 0.7);
      stroke: rgba(120, 95, 55, 0.9);
    }

    .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-chip.is-seventh {
      fill: url(#seventhGrad);
      stroke: rgba(40, 60, 110, 0.7);
    }

    .note-chip.is-extension {
      fill: url(#extensionGrad);
      stroke: rgba(70, 40, 120, 0.75);
    }
    .root-menu-title {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 56px;
      height: 34px;
      padding: 0 0.5rem;
      border-radius: 8px;
      border: 1px solid rgba(246, 194, 74, 0.36);
      background: rgba(246, 194, 74, 0.12);
      color: #ffe9b9;
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      line-height: 1;
    }

    .root-accidental-group {
      display: flex;
      gap: 0.35rem;
    }

    .root-accidental-group .btn {
      min-width: 40px;
      height: 38px;
      padding: 0 0.45rem;
      border-radius: 6px !important;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .root-accidental-group .btn.is-selected {
      background: #f6c24a;
      color: #111;
      border-color: #f6c24a;
    }

    .triad-menu-title {
      min-width: 66px;
      margin-left: 0;
    }

    .note-location-menu [data-root-select] {
      min-width: 96px;
    }

    .note-location-menu [data-triad-select] {
      min-width: 130px;
    }

    .seventh-menu-title {
      min-width: 52px;
      margin-left: 0;
    }

    .note-location-menu [data-seventh-select] {
      min-width: 100px;
    }

    .extension-menu-title {
      min-width: 54px;
      margin-left: 0;
    }

    .extension-inline-group {
      display: inline-flex;
      align-items: center;
      gap: 0.55rem;
      flex-wrap: nowrap;
    }

    .note-location-menu [data-extension-select] {
      min-width: 96px;
    }

    .extension-accidental-group {
      display: inline-flex;
      gap: 0.35rem;
      flex-wrap: nowrap;
    }

    .extension-accidental-group .btn {
      min-width: 36px;
      height: 38px;
      padding: 0 0.4rem;
      border-radius: 6px !important;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .upper-extension-menu-title {
      min-width: 78px;
      margin-left: 0;
    }

    .note-location-menu [data-upper-extension-select] {
      min-width: 96px;
    }

    .upper-extension-inline-group {
      display: inline-flex;
      align-items: center;
      gap: 0.55rem;
      flex-wrap: nowrap;
    }

    .upper-extension-accidental-group {
      display: inline-flex;
      gap: 0.35rem;
      flex-wrap: nowrap;
    }

    .upper-extension-accidental-group .btn {
      min-width: 40px;
      height: 40px;
      padding: 0 0.45rem;
      border-radius: 6px !important;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .note-location-menu.chord-theory-controls {
      border-radius: 6px;
      padding: 0.72rem 0.85rem 0.76rem;
      background: #101010;
      border: 1px solid rgba(255, 215, 120, 0.25);
      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);
      gap: 0.56rem;
      overflow: visible;
    }

    .note-location-menu.chord-theory-controls .root-inline-group,
    .note-location-menu.chord-theory-controls .triad-inline-group,
    .note-location-menu.chord-theory-controls .seventh-inline-group,
    .note-location-menu.chord-theory-controls .extension-inline-group,
    .note-location-menu.chord-theory-controls .upper-extension-inline-group {
      display: flex;
      align-items: center;
      gap: 0.42rem;
      min-height: 48px;
      padding: 0.42rem 0.5rem;
      border-radius: 6px;
      border: 1px solid rgba(255, 215, 120, 0.18);
      background: #131313;
      flex: 1 1 auto;
    }

    .note-location-menu.chord-theory-controls--primary {
      display: grid;
      grid-template-columns: minmax(260px, 1.35fr) minmax(190px, 1fr) minmax(150px, 0.8fr) minmax(180px, 0.9fr);
      grid-template-areas:
        "root chord fifth seventh"
        "extension extension add clear";
      align-items: stretch;
      gap: 0.56rem;
    }

    .note-location-menu.chord-theory-controls--primary .root-inline-group { grid-area: root; }
    .note-location-menu.chord-theory-controls--primary .triad-inline-group { grid-area: chord; }
    .note-location-menu.chord-theory-controls--primary .fifth-inline-group { grid-area: fifth; }
    .note-location-menu.chord-theory-controls--primary .seventh-inline-group:not(.fifth-inline-group) { grid-area: seventh; }
    .note-location-menu.chord-theory-controls--primary .upper-extension-inline-group { grid-area: extension; }
    .note-location-menu.chord-theory-controls--primary .extension-inline-group { grid-area: add; }

    .note-location-menu.chord-theory-controls--primary .root-inline-group {
      flex: 1 1 auto;
    }

    .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
      grid-area: clear;
      flex: 0 0 auto;
      margin-left: 0;
      min-height: 48px;
      border-radius: 6px;
      padding-inline: 0.8rem;
      align-self: stretch;
    }

    .fretboard-controls--extensions {
      display: grid;
      grid-template-columns: minmax(320px, 1fr) minmax(320px, 1fr);
      gap: 0.75rem;
    }

    .fretboard-controls--extensions .note-location-menu.chord-theory-controls {
      min-width: 0;
      width: 100%;
    }

    .note-location-menu.chord-theory-controls--extension,
    .note-location-menu.chord-theory-controls--add {
      display: block;
    }

    .note-location-menu.chord-theory-controls--extension .upper-extension-inline-group,
    .note-location-menu.chord-theory-controls--add .extension-inline-group {
      display: grid;
      grid-template-columns: auto 1fr auto;
      align-items: center;
      gap: 0.6rem;
    }

    .overlay-mode-row {
      margin: 0.66rem 0 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.5rem 0.8rem;
      padding: 0.48rem;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.14);
      background: linear-gradient(180deg, rgba(14, 12, 10, 0.92), rgba(10, 9, 8, 0.9));
      box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.04),
        0 8px 20px rgba(0, 0, 0, 0.4);
    }

    .overlay-mode-row + .fretboard-controls {
      margin-top: 0.72rem;
    }

    .overlay-mode-toggle {
      width: 100%;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 0.46rem;
    }

    .overlay-mode-toggle .btn {
      position: relative;
      overflow: hidden;
      min-width: 0;
      width: 100%;
      font-size: 0.88rem;
      font-weight: 750;
      letter-spacing: 0.02em;
      border-width: 1px;
      border-radius: 999px;
      border-color: rgba(255, 255, 255, 0.18);
      background: rgba(10, 10, 9, 0.92);
      color: rgba(246, 241, 231, 0.8);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
      padding: 0.56rem 0.62rem;
      transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
    }

    .overlay-mode-toggle .btn::after {
      content: "";
      position: absolute;
      left: 18%;
      right: 18%;
      bottom: 0.26rem;
      height: 2px;
      border-radius: 999px;
      background: linear-gradient(90deg, rgba(246, 194, 74, 0), rgba(246, 194, 74, 0.72), rgba(246, 194, 74, 0));
      transform: scaleX(0);
      transform-origin: center;
      transition: transform 0.18s ease;
      pointer-events: none;
    }

    .overlay-mode-toggle .btn:hover {
      border-color: rgba(255, 255, 255, 0.3);
      color: rgba(255, 248, 234, 0.92);
      box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 6px 14px rgba(0, 0, 0, 0.34);
      transform: translateY(-1px);
    }

    .overlay-mode-toggle .btn.is-selected {
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      color: #12131a;
      border-color: rgba(246, 194, 74, 0.95);
      box-shadow:
        inset 0 1px 0 rgba(255, 248, 228, 0.78),
        0 8px 18px rgba(66, 42, 8, 0.36);
    }

    .overlay-mode-toggle .btn.is-selected::after {
      transform: scaleX(1);
    }

    .overlay-mode-toggle .btn[disabled] {
      opacity: 0.55;
      cursor: not-allowed;
    }

    .voicing-cycle-row {
      margin: 0.5rem 0 0;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .voicing-cycle-btn {
      min-width: 44px;
      font-size: 1rem;
      font-weight: 700;
      line-height: 1;
      padding-inline: 0.7rem;
    }
    .voicing-inversions-btn {
      white-space: nowrap;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.02em;
      padding-inline: 0.6rem;
    }

    .voicing-cycle-label {
      margin: 0;
      min-width: 0;
      flex: 1 1 auto;
      text-align: center;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: #f0f3fa;
      padding: 0.45rem 0.65rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.35);
      background: rgba(17, 18, 24, 0.68);
    }

    .upper-extension-prompt {
      margin: 0.55rem 0 0;
      padding: 0.5rem 0.7rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.45);
      background: rgba(30, 22, 10, 0.75);
      color: #ffe9b9;
      font-size: 0.82rem;
      line-height: 1.4;
      display: none;
    }

    .upper-extension-prompt.is-visible {
      display: block;
    }

    .chord-name-display {
      margin: 0.64rem 0 0;
      padding: 0.72rem 0.9rem;
      border-radius: 14px;
      border: 2px solid rgba(246, 194, 74, 0.72);
      background: linear-gradient(180deg, rgba(31, 23, 11, 0.95), rgba(18, 13, 8, 0.96));
      color: #fff1d2;
      font-size: clamp(1.08rem, 2.1vw, 1.45rem);
      font-weight: 800;
      letter-spacing: 0.03em;
      text-align: center;
      text-shadow:
        0 1px 0 rgba(0, 0, 0, 0.42),
        0 0 14px rgba(246, 194, 74, 0.28);
      box-shadow:
        0 10px 26px rgba(12, 9, 4, 0.46),
        inset 0 1px 0 rgba(255, 241, 214, 0.14);
      transition: box-shadow 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
    }

    .chord-name-display.is-updated {
      border-color: rgba(250, 208, 105, 0.95);
      box-shadow:
        0 14px 30px rgba(20, 14, 5, 0.54),
        0 0 18px rgba(246, 194, 74, 0.32),
        inset 0 1px 0 rgba(255, 244, 222, 0.22);
      transform: translateY(-1px);
    }

    .chord-enharmonics-display {
      margin: 0.42rem 0 0;
      padding: 0.5rem 0.7rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.35);
      background: rgba(28, 21, 10, 0.7);
      color: #ffe7b7;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.01em;
      text-align: center;
      line-height: 1.35;
    }

    .analyser-action-row {
      margin: 0.55rem 0 0;
      display: flex;
      justify-content: center;
    }

    .analyser-action-row .btn {
      min-width: 160px;
      min-height: 44px;
      font-weight: 700;
    }

    .interval-legend {
      margin: 0.52rem 0 0;
      padding: 0.52rem 0.7rem;
      border-radius: 10px;
      border: 1px solid rgba(246, 194, 74, 0.28);
      background: rgba(16, 15, 20, 0.65);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.45rem 0.75rem;
    }

    .interval-legend-item {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      color: #e9edf7;
      font-size: 0.82rem;
      font-weight: 600;
      line-height: 1.2;
      letter-spacing: 0.01em;
      white-space: nowrap;
    }

    .interval-legend-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 1px solid rgba(255, 255, 255, 0.45);
      box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.24) inset;
      flex-shrink: 0;
    }

        .interval-legend-dot.is-root {
      background: #ffcc33;
      border-color: rgba(255, 240, 200, 0.85);
    }


    .chord-play-row--top {
      margin-top: 0.42rem;
      justify-content: flex-end;
    }

    .chord-play-row--top [data-action='play-current-chord'] {
      min-width: 176px;
      min-height: 46px;
      padding: 0.5rem 1rem;
      border-color: rgba(255, 226, 153, 0.92);
      background: linear-gradient(180deg, #ffd36b 0%, #f0b93d 100%);
      color: #19140b;
      font-weight: 800;
      letter-spacing: 0.02em;
      text-transform: uppercase;
      box-shadow:
        0 0 0 1px rgba(22, 18, 11, 0.35) inset,
        0 6px 18px rgba(246, 194, 74, 0.35);
      transition: transform 0.14s ease, box-shadow 0.14s ease, filter 0.14s ease;
    }

    .chord-play-row--top [data-action='play-current-chord']:hover,
    .chord-play-row--top [data-action='play-current-chord']:focus-visible {
      border-color: rgba(255, 234, 177, 0.98);
      color: #120f09;
      filter: brightness(1.04);
      box-shadow:
        0 0 0 1px rgba(25, 20, 12, 0.4) inset,
        0 10px 24px rgba(246, 194, 74, 0.45);
      transform: translateY(-1px);
    }

    .chord-play-row--top [data-action='play-current-chord']:active {
      transform: translateY(0);
      filter: brightness(0.98);
      box-shadow:
        0 0 0 1px rgba(25, 20, 12, 0.42) inset,
        0 4px 12px rgba(246, 194, 74, 0.28);
    }

    .chord-play-row--top [data-action='play-current-chord']:disabled {
      border-color: rgba(181, 177, 164, 0.48);
      background: linear-gradient(180deg, rgba(134, 128, 114, 0.55) 0%, rgba(106, 100, 88, 0.55) 100%);
      color: rgba(244, 238, 223, 0.68);
      box-shadow: none;
      cursor: not-allowed;
      transform: none;
      filter: none;
      text-transform: none;
    }

    .interval-legend-dot.is-third {
      background: #4bc187;
      border-color: rgba(168, 242, 207, 0.78);
    }

    .interval-legend-dot.is-fifth {
      background: #4fcfe0;
      border-color: rgba(191, 247, 255, 0.82);
    }

    .interval-legend-dot.is-seventh {
      background: #9fbaf3;
      border-color: rgba(223, 235, 255, 0.78);
    }

    .interval-legend-dot.is-extension {
      background: #b489ff;
      border-color: rgba(234, 222, 255, 0.86);
    }


    .note-location-menu .btn.is-selected:hover,
    .note-location-menu .btn[aria-pressed="true"]:hover,
    .note-location-menu .btn.active:hover,
    .note-location-menu .btn-check:checked + .btn:hover,
    .note-location-menu .btn[aria-pressed="true"]:active,
    .note-location-menu .btn.active:active {
      background: linear-gradient(180deg, #f8cf72 0%, #f0b93d 100%);
      color: #12131a;
      border-color: rgba(246, 194, 74, 0.95);
    }

    @media (max-width: 1040px) {
      .note-location-menu.chord-theory-controls--primary {
        grid-template-columns: repeat(2, minmax(260px, 1fr));
        grid-template-areas:
          "root chord"
          "fifth seventh"
          "extension add"
          "clear clear";
      }

      .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
        grid-column: 1 / -1;
        width: 100%;
      }
    }

    .note-text {
      font-family: "Cal Sans", 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", 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;
      }

      .note-location-menu.chord-theory-controls--primary.is-mobile-active {
        display: grid !important;
        grid-template-columns: 1fr !important;
        grid-template-areas:
          "root"
          "chord"
          "fifth"
          "seventh"
          "extension"
          "add"
          "clear" !important;
      }

      .note-location-menu.chord-theory-controls--extension.is-mobile-active,
      .note-location-menu.chord-theory-controls--add.is-mobile-active {
        display: block !important;
      }

      .fretboard-controls--extensions {
        grid-template-columns: 1fr;
      }

      .note-location-menu.chord-theory-controls .root-inline-group,
      .note-location-menu.chord-theory-controls .triad-inline-group,
      .note-location-menu.chord-theory-controls .seventh-inline-group,
      .note-location-menu.chord-theory-controls .extension-inline-group,
      .note-location-menu.chord-theory-controls .upper-extension-inline-group {
        flex-wrap: wrap;
      }

      .note-location-menu.chord-theory-controls--extension .upper-extension-inline-group,
      .note-location-menu.chord-theory-controls--add .extension-inline-group {
        grid-template-columns: 1fr;
      }

      .overlay-mode-row {
        flex-direction: column;
        align-items: stretch;
      }

      .overlay-mode-toggle {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
      }

      .overlay-mode-toggle .btn {
        width: 100%;
      }

      .voicing-cycle-row {
        width: 100%;
      }

      .voicing-cycle-label {
        width: 100%;
      }

      .note-location-menu.chord-theory-controls .form-select {
        width: 100%;
        min-width: 0;
      }

      .note-location-menu.chord-theory-controls .btn-group {
        width: auto;
      }
    }


.note-location-menu .form-select,
.note-location-menu .form-select option {
  font-family: "Cal Sans", "Segoe UI Symbol", "Noto Sans Symbols 2", system-ui, sans-serif;
}

/* Mobile density + canvas usability tune-up (chord page only) */
@media (max-width: 991.98px) {
  .chord-play-row--top {
    margin-top: 0.3rem;
    justify-content: stretch;
  }

  .chord-play-row--top [data-action='play-current-chord'] {
    width: 100%;
    min-height: 42px;
    padding: 0.45rem 0.8rem;
    font-size: 0.92rem;
  }

  .fretboard-page-intro {
    padding: 0;
  }

  .fretboard-page-intro__inner {
    padding: 1.15rem 0.95rem 1rem;
    border-radius: 0;
  }

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

  .fretboard-lab {
    padding: 0;
  }

  .fretboard-shell {
    padding: 0;
    border-radius: 0;
  }

  .note-location-menu.chord-theory-controls {
    padding: 0.6rem 0.7rem;
    gap: 0.42rem;
    border-radius: 6px;
  }

  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group {
    min-height: 40px;
    padding: 0.3rem 0.36rem;
    gap: 0.3rem;
    flex-wrap: nowrap;
  }

  .root-menu-title {
    min-width: 48px;
    height: 28px;
    padding: 0 0.34rem;
    font-size: 0.66rem;
  }

  .triad-menu-title {
    min-width: 50px;
  }

  .seventh-menu-title {
    min-width: 42px;
  }

  .extension-menu-title {
    min-width: 44px;
  }

  .upper-extension-menu-title {
    min-width: 64px;
  }

  .note-location-menu.chord-theory-controls .form-select {
    height: 34px;
    padding: 0.26rem 0.5rem;
    font-size: 0.84rem;
    line-height: 1.08;
  }

  .root-accidental-group .btn,
  .extension-accidental-group .btn,
  .upper-extension-accidental-group .btn {
    min-width: 32px;
    height: 32px;
    padding: 0 0.28rem;
    font-size: 0.88rem;
  }

  .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
    min-height: 40px;
    border-radius: 6px;
    padding-inline: 0.62rem;
  }

  .overlay-mode-row {
    margin-top: 0.5rem;
    padding: 0.42rem;
    border-radius: 12px;
  }

  .overlay-mode-toggle {
    gap: 0.34rem;
  }

  .overlay-mode-toggle .btn {
    padding: 0.46rem 0.42rem;
    font-size: 0.78rem;
  }

  .voicing-cycle-row {
    gap: 0.35rem;
  }

  .voicing-cycle-btn {
    min-width: 38px;
    padding-inline: 0.5rem;
  }

  .voicing-cycle-label {
    font-size: 0.75rem;
    padding: 0.36rem 0.5rem;
  }

  .voicing-inversions-btn {
    font-size: 0.7rem;
    padding-inline: 0.46rem;
  }

  .chord-name-display {
    margin-top: 0.5rem;
    padding: 0.56rem 0.66rem;
    font-size: clamp(0.96rem, 4.6vw, 1.14rem);
  }

  .interval-legend {
    gap: 0.4rem;
    padding: 0.44rem 0.48rem;
  }

  .fretboard-canvas-wrap {
    margin-top: 0;
    border-radius: 6px;
  }

  .fretboard-canvas {
    height: clamp(212px, 62vw, 328px);
    padding: 0.22rem 0.16rem 0.24rem;
  }
}

@media (max-width: 991.98px) {
  .fretboard-lab::before {
    opacity: 0;
  }

  .fretboard-lab::after {
    width: 0;
    height: 0;
    right: 0;
    top: 0;
    opacity: 0;
    filter: none;
  }

  .fretboard-shell::before {
    opacity: 0;
  }
}

.fretboard-intro-supporting {
  max-width: 64rem;
  margin: 1rem auto 0;
  color: #b9b3a8;
  line-height: 1.65;
  text-align: center;
}

.fretboard-intro-supporting a {
  color: #f6c24a;
  text-decoration-thickness: .08em;
  text-underline-offset: .18em;
}

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

.faq-collection__summary {
  position: relative;
  display: grid;
  gap: 0.35rem;
  padding: 1.4rem 4rem 1.4rem 1.5rem;
  cursor: pointer;
  list-style: none;
}

.faq-collection__summary::-webkit-details-marker { display: none; }
.faq-collection__summary::after {
  content: "+";
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  color: #d5a842;
  font-size: 2rem;
}
.faq-collection[open] > .faq-collection__summary::after { content: "\2212"; }
.faq-collection__title { color: #f4f1e8; font-size: clamp(1.45rem, 2vw, 2rem); font-weight: 700; }
.faq-collection__copy { color: rgba(244, 241, 232, 0.72); }
.faq-collection__content { padding: 0 1rem 1rem; }


/* Chord tool refinement: original layout with the fretboard visual language. */
@media (min-width: 1041px) {
  .fretboard-shell {
    padding: 0.8rem 1rem;
    border: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .chord-tool-toolbar {
    margin-bottom: 0.75rem;
  }

  .overlay-mode-toggle {
    padding: 3px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    background: #080909;
  }

  .overlay-mode-toggle .btn {
    min-height: 36px;
    padding: 5px 18px;
    border-radius: 4px;
    font-size: 12px;
  }

  .chord-builder-heading {
    padding: 0.8rem 0 0.65rem;
  }

  .chord-builder-heading__eyebrow {
    font-size: 0.72rem;
  }

  .chord-builder-heading__hint {
    font-size: 0.78rem;
  }

  .chord-builder-heading .chord-play-row--top [data-action='play-current-chord'] {
    min-width: 140px;
    min-height: 38px;
    padding: 5px 14px;
    border-radius: 5px;
    font-size: 12px;
  }

  .fretboard-controls[data-chord-controls-primary] {
    padding: 0;
    border: 0;
    background: transparent;
  }

  .note-location-menu.chord-theory-controls--primary {
    grid-template-columns: 1.15fr 0.9fr 0.85fr 0.9fr;
    grid-template-areas:
      "root chord fifth seventh"
      "extension add add clear";
    align-items: stretch;
    gap: 0.75rem 1rem;
    padding: 0.45rem 0 0.8rem;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group {
    gap: 6px;
  }

  .note-location-menu.chord-theory-controls .root-inline-group {
    grid-template-columns: minmax(90px, 1fr) auto;
  }

  .note-location-menu.chord-theory-controls .root-menu-title {
    color: rgba(255, 255, 255, 0.68);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
  }

  .note-location-menu.chord-theory-controls .form-select {
    height: 36px;
    min-height: 36px;
    padding: 4px 30px 4px 10px;
    border-color: rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    background-color: #080909;
    background-size: 12px 9px;
    color: rgba(255, 255, 255, 0.88);
    font-size: 12px;
    font-weight: 600;
    box-shadow: none;
  }

  .note-location-menu.chord-theory-controls .root-accidental-group,
  .note-location-menu.chord-theory-controls .extension-accidental-group,
  .note-location-menu.chord-theory-controls .upper-extension-accidental-group {
    gap: 4px;
  }

  .note-location-menu.chord-theory-controls .root-accidental-group .btn,
  .note-location-menu.chord-theory-controls .extension-accidental-group .btn,
  .note-location-menu.chord-theory-controls .upper-extension-accidental-group .btn {
    min-width: 36px;
    width: 36px;
    height: 36px;
    min-height: 36px;
    padding: 3px;
    border-color: rgba(255, 255, 255, 0.12);
    border-radius: 4px !important;
    font-size: 12px;
  }

  .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
    min-width: 90px;
    min-height: 36px;
    height: 36px;
    padding: 4px 12px;
    border-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.025);
    color: rgba(255, 255, 255, 0.55);
    font-size: 11px;
  }

  .upper-extension-prompt {
    min-height: revert;
    margin: revert;
    font-size: revert;
  }

  .chord-result-panel {
    margin: revert;
    padding: revert;
    border: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .chord-name-display,
  .chord-formula-display,
  .chord-enharmonics-display {
    font-size: revert;
  }

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

@keyframes chord-tutorial-button-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.chord-result-prompt-button[data-action="launch-chord-tutorial"] {
  animation: chord-tutorial-button-float 3.2s ease-in-out infinite;
  will-change: transform;
}

.chord-result-prompt-button[data-action="launch-chord-tutorial"]:hover,
.chord-result-prompt-button[data-action="launch-chord-tutorial"]:focus-visible {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .chord-result-prompt-button[data-action="launch-chord-tutorial"] {
    animation: none;
  }
}



@media (max-width: 991.98px) and (orientation: landscape) {
  .chord-play-row--top {
    margin-top: 0.22rem;
    justify-content: flex-end;
  }

  .chord-play-row--top [data-action='play-current-chord'] {
    width: auto;
    min-width: 136px;
    min-height: 35px;
    padding: 0.32rem 0.68rem;
    font-size: 0.8rem;
  }

  .fretboard-lab {
    padding: 0;
  }

  .fretboard-shell {
    padding: 0;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }

  .fretboard-canvas-wrap {
    margin-top: 0;
    border-radius: 6px;
    border-left: 1px solid rgba(255, 215, 120, 0.28);
    border-right: 1px solid rgba(255, 215, 120, 0.28);
  }

  .fretboard-canvas {
    height: clamp(420px, 94vh, 820px);
    padding: 0.16rem 0.08rem 0.2rem;
  }
}


@media (max-width: 991.98px) {
  .faq-block {
    display: block !important;
  }
}

/* Minimal surface pass: controls sit directly on the page instead of nested cards. */
.fretboard-page-intro__inner,
.fretboard-page-intro__inner.is-collapsed,
.chord-tool-toolbar,
.chord-builder-heading,
.note-location-menu.chord-theory-controls,
.interval-legend {
  background: #0b0b0b;
  border: 0;
  box-shadow: none;
}

.fretboard-page-intro__inner::before {
  opacity: 0.12;
}

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

.fretboard-info-card,
.fretboard-info-card:first-child,
.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;
}

.chord-tool-toolbar {
  padding-block: 0.65rem;
}

.chord-builder-heading {
  padding-top: 0.75rem;
  padding-bottom: 0.25rem;
}

.note-location-menu.chord-theory-controls {
  gap: 0.8rem 1rem;
  padding: 0.55rem clamp(0.8rem, 2vw, 1.35rem) 0.85rem;
}

.note-location-menu.chord-theory-controls .root-inline-group,
.note-location-menu.chord-theory-controls .triad-inline-group,
.note-location-menu.chord-theory-controls .seventh-inline-group,
.note-location-menu.chord-theory-controls .extension-inline-group,
.note-location-menu.chord-theory-controls .upper-extension-inline-group {
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.note-location-menu.chord-theory-controls .form-select {
  border-color: rgba(255, 255, 255, 0.16);
  background-color: #111;
  box-shadow: none;
}

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

.upper-extension-prompt,
.chord-enharmonics-display {
  border-inline: 0;
  border-radius: 0;
  background: transparent;
}

.chord-name-display {
  border: 0;
  border-bottom: 1px solid rgba(246, 194, 74, 0.42);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.chord-name-display.is-updated {
  border-color: rgba(246, 194, 74, 0.75);
  box-shadow: none;
  transform: none;
}

.chord-name-display.is-error {
  color: #ff8a80;
  border-color: rgba(255, 138, 128, 0.65);
}

.chord-result-prompt-link {
  display: inline-block;
  margin-top: 0.42rem;
  color: #f6c24a;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.faq__formula-section {
  margin-top: 1.35rem;
  padding-top: 1.05rem;
  border-top: 1px solid rgba(246, 194, 74, 0.2);
}

#faq-chord-formulas .faq__intro p {
  max-width: 78ch;
  font-size: clamp(1.02rem, 1.25vw, 1.14rem);
  line-height: 1.72;
}

.faq__formula-reference-grid {
  display: grid;
  grid-template-columns: minmax(12rem, 0.72fr) minmax(0, 1.28fr);
  gap: 0;
  margin-top: 0.75rem;
  border-top: 1px solid rgba(246, 194, 74, 0.3);
  border-inline: 1px solid rgba(246, 194, 74, 0.3);
  border-radius: 10px;
  overflow: hidden;
  background: rgba(31, 24, 12, 0.42);
}

.faq__formula-reference-grid::before,
.faq__formula-reference-grid::after {
  padding: 0.58rem 0.7rem;
  background: rgba(55, 42, 20, 0.64);
  border-bottom: 1px solid rgba(246, 194, 74, 0.3);
  color: #ffe9b9;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.faq__formula-reference-grid::before {
  content: "CHORD TYPE";
  grid-column: 1;
  grid-row: 1;
}

.faq__formula-reference-grid::after {
  content: "FORMULA";
  grid-column: 2;
  grid-row: 1;
}

.faq__formula-reference-card {
  display: contents;
}

.faq__formula-reference-card p {
  grid-column: 1;
  margin: 0;
  padding: 0.58rem 0.7rem;
  border-bottom: 1px solid rgba(246, 194, 74, 0.22);
  color: #ffe9b9;
  font-weight: 700;
}

.faq__formula-reference-card strong {
  grid-column: 2;
  padding: 0.58rem 0.7rem;
  border-bottom: 1px solid rgba(246, 194, 74, 0.22);
  color: rgba(255, 255, 255, 0.9);
  font-family: "Cal Sans", sans-serif;
  font-weight: 600;
}

#faq-chord-formulas .faq__formula-section > .faq__formula-reference-grid + p {
  margin-top: 1.35rem;
}

#faq-chord-formulas .faq__formula-section > .faq__formula-reference-grid ~ p {
  max-width: 78ch;
  margin-bottom: 0;
  font-size: clamp(1.02rem, 1.25vw, 1.14rem);
  line-height: 1.72;
}

#faq-chord-formulas .faq__formula-section > .faq__formula-reference-grid + p + p {
  margin-top: 0.7rem;
}

@media (max-width: 600px) {
  .faq__formula-reference-grid {
    grid-template-columns: minmax(8.5rem, 0.75fr) minmax(0, 1.25fr);
  }

  .faq__formula-reference-card p,
  .faq__formula-reference-card strong {
    padding: 0.54rem 0.5rem;
    font-size: 0.88rem;
  }
}


.chord-enharmonics-display {
  color: #f6c24a;
  line-height: 1.7;
  word-spacing: 0.14em;
}

.voicing-cycle-label {
  border: 0;
  border-radius: 0;
  background: transparent;
}

.interval-legend {
  justify-content: center;
  padding-block: 0.45rem;
}

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

  .fretboard-info-card,
  .fretboard-info-card:first-child,
  .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);
  }

  .note-location-menu.chord-theory-controls {
    gap: 0.75rem;
    padding-inline: 0.75rem;
  }
}

/* Chord tool layout: keep navigation, construction and results visually distinct. */
.fretboard-page-intro__inner {
  padding: 1.15rem clamp(1rem, 3vw, 2rem);
}

.fretboard-page-intro h1 {
  margin-bottom: 0.65rem;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.fretboard-intro-toggle {
  display: block;
  margin: 0 auto;
  min-height: 44px;
  padding: 0.65rem 1.1rem;
  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;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.fretboard-intro-toggle:hover,
.fretboard-intro-toggle:focus-visible {
  border-color: #f5dda0 !important;
  border-radius: 0 !important;
  background: #e0b65d !important;
  color: #171109 !important;
  box-shadow: none !important;
  outline: 2px solid rgba(246, 194, 74, 0.32);
  outline-offset: 3px;
}

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

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

.chord-tool-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  gap: 0.65rem;
  padding: 0.75rem clamp(0.75rem, 2vw, 1.25rem);
  border-block: 1px solid rgba(255, 215, 120, 0.2);
  background: #0f0f0f;
}

.chord-tool-toolbar .overlay-mode-row,
.chord-tool-toolbar .chord-play-row--top {
  margin: 0;
}

.chord-tool-toolbar .overlay-mode-row {
  display: grid;
  grid-template-columns: auto minmax(0, 460px);
  justify-content: start;
  align-items: center;
  gap: 0.7rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.chord-tool-toolbar__label,
.chord-builder-heading__eyebrow {
  margin: 0;
  color: #f6c24a;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.chord-tool-toolbar .overlay-mode-toggle {
  min-width: 360px;
}

.chord-tool-toolbar .chord-play-row--top [data-action='play-current-chord'] {
  min-width: 140px;
  min-height: 42px;
}

.chord-builder-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  padding: 0.85rem clamp(0.85rem, 2vw, 1.35rem) 0.55rem;
  background: #0b0b0b;
}

.chord-builder-heading__hint {
  margin: 0.22rem 0 0;
  color: rgba(246, 241, 231, 0.66);
  font-size: 0.8rem;
}

.note-location-menu.chord-theory-controls {
  padding: 0.7rem;
  border-inline: 0;
  border-radius: 0;
  background: #0b0b0b;
  box-shadow: none;
}

.note-location-menu.chord-theory-controls .root-inline-group,
.note-location-menu.chord-theory-controls .triad-inline-group,
.note-location-menu.chord-theory-controls .seventh-inline-group,
.note-location-menu.chord-theory-controls .extension-inline-group,
.note-location-menu.chord-theory-controls .upper-extension-inline-group {
  display: grid;
  grid-template-columns: 1fr;
  align-content: start;
  gap: 0.42rem;
  min-width: 0;
  min-height: 78px;
  padding: 0.58rem;
  border-color: rgba(255, 255, 255, 0.1);
  background: #121212;
}

.note-location-menu.chord-theory-controls .root-inline-group {
  grid-template-columns: auto 1fr;
}

.note-location-menu.chord-theory-controls .root-inline-group .root-menu-title {
  grid-column: 1 / -1;
}

.note-location-menu.chord-theory-controls .root-menu-title {
  justify-content: flex-start;
  width: auto;
  min-width: 0;
  height: auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: rgba(255, 233, 185, 0.78);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.note-location-menu.chord-theory-controls .form-select {
  width: 100%;
  min-width: 0;
}

.note-location-menu.chord-theory-controls .upper-extension-inline-group,
.note-location-menu.chord-theory-controls .extension-inline-group {
  grid-template-columns: minmax(0, 1fr) auto;
}

.note-location-menu.chord-theory-controls .upper-extension-inline-group .root-menu-title,
.note-location-menu.chord-theory-controls .extension-inline-group .root-menu-title {
  grid-column: 1 / -1;
}

.chord-name-display {
  margin: 0.65rem auto 0;
  width: min(calc(100% - 1.4rem), 760px);
  padding: 0.65rem 0.85rem;
  border-width: 1px;
  border-radius: 8px;
  box-shadow: none;
}

.upper-extension-prompt,
.chord-enharmonics-display,
.voicing-cycle-row,
.analyser-action-row[data-analyser-action],
.interval-legend {
  margin-inline: clamp(0.7rem, 2vw, 1.25rem);
}

@media (max-width: 1040px) {
  .chord-tool-toolbar {
    grid-template-columns: 1fr;
  }

  .chord-tool-toolbar .chord-play-row--top {
    justify-content: stretch;
  }

  .chord-tool-toolbar .chord-play-row--top [data-action='play-current-chord'] {
    width: 100%;
  }
}

@media (max-width: 991.98px) {
  .chord-tool-toolbar .overlay-mode-row {
    grid-template-columns: 1fr;
  }

  .chord-tool-toolbar .overlay-mode-toggle {
    min-width: 0;
  }

  .chord-builder-heading__hint {
    max-width: 42ch;
  }

  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group {
    min-height: 0;
  }
}








































/* Landscape mobile compact controls override (chord page) */
@media (max-width: 991.98px) and (orientation: landscape) {
  .note-location-menu.chord-theory-controls {
    padding: 0.6rem 0.7rem;
    gap: 0.3rem;
    border-radius: 6px;
  }

  .note-location-menu.chord-theory-controls--primary.is-mobile-active {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    grid-template-areas:
      "root chord"
      "fifth seventh"
      "extension add"
      "clear clear" !important;
    gap: 0.3rem;
  }

  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group {
    min-height: 34px;
    padding: 0.22rem 0.28rem;
    gap: 0.24rem;
  }

  .root-menu-title {
    min-width: 44px;
    height: 24px;
    padding: 0 0.3rem;
    font-size: 0.6rem;
  }

  .triad-menu-title {
    min-width: 46px;
  }

  .seventh-menu-title {
    min-width: 40px;
  }

  .extension-menu-title {
    min-width: 40px;
  }

  .upper-extension-menu-title {
    min-width: 58px;
  }

  .note-location-menu.chord-theory-controls .form-select {
    height: 30px;
    padding: 0.18rem 0.44rem;
    font-size: 0.8rem;
    line-height: 1.05;
  }

  .root-accidental-group .btn,
  .extension-accidental-group .btn,
  .upper-extension-accidental-group .btn {
    min-width: 28px;
    height: 28px;
    padding: 0 0.2rem;
    font-size: 0.8rem;
  }

  .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
    grid-column: 1 / -1;
    min-height: 34px;
    border-radius: 6px;
    padding-inline: 0.5rem;
  }

  .overlay-mode-row {
    margin-top: 0.36rem;
    padding: 0.34rem;
    border-radius: 10px;
  }

  .chord-name-display {
    margin-top: 0.36rem;
    padding: 0.46rem 0.56rem;
  }

  .interval-legend {
    margin-top: 0.34rem;
    padding: 0.32rem 0.4rem;
    gap: 0.28rem 0.5rem;
  }

  .interval-legend-item {
    font-size: 0.72rem;
    gap: 0.3rem;
  }

  .interval-legend-dot {
    width: 10px;
    height: 10px;
  }
}

/* Final surface reset — intentionally last so compact breakpoints stay flat. */
.fretboard-page-intro__inner,
.fretboard-page-intro__inner.is-collapsed,
.chord-tool-toolbar,
.chord-builder-heading,
.note-location-menu.chord-theory-controls,
.interval-legend {
  border: 0;
  border-radius: 0;
  background-color: #0b0b0b;
  box-shadow: none;
}

.note-location-menu.chord-theory-controls {
  gap: 0.8rem 1rem;
  padding: 0.55rem clamp(0.75rem, 2vw, 1.35rem) 0.85rem;
}

.note-location-menu.chord-theory-controls .root-inline-group,
.note-location-menu.chord-theory-controls .triad-inline-group,
.note-location-menu.chord-theory-controls .seventh-inline-group,
.note-location-menu.chord-theory-controls .extension-inline-group,
.note-location-menu.chord-theory-controls .upper-extension-inline-group {
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.note-location-menu.chord-theory-controls .root-menu-title {
  min-width: 0;
  height: auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: #f8cf72;
}

.chord-name-display,
.chord-name-display.is-updated {
  border: 0;
  border-bottom: 1px solid rgba(246, 194, 74, 0.5);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transform: none;
}

.upper-extension-prompt,
.chord-enharmonics-display,
.voicing-cycle-label {
  border-inline: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

/* Reference-led control layout. */
.fretboard-lab {
  background-color: #0b0b0b;
  background-image: none;
}

.fretboard-page-intro__inner::before,
.fretboard-lab::before {
  background-image: url("../images/backgrounds/paisley2.webp");
  background-position: center top;
  background-size: 1920px auto;
  background-repeat: repeat-y;
  background-attachment: fixed;
  opacity: 0.32;
  filter: none;
}

.chord-tool-toolbar {
  display: block;
  padding: 0;
  border-bottom: 1px solid rgba(246, 194, 74, 0.72);
  background: transparent;
}

.chord-tool-toolbar .overlay-mode-row {
  display: block;
  padding: 0;
}

.chord-tool-toolbar .overlay-mode-toggle {
  width: min(100%, 560px);
  min-width: 0;
  gap: 0;
  margin-inline: auto;
}

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

.chord-tool-toolbar .overlay-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;
}

.chord-tool-toolbar .overlay-mode-toggle .btn::after {
  display: none;
}

.chord-builder-heading {
  padding: 1.25rem clamp(1rem, 2vw, 1.5rem) 0.8rem;
  background: transparent;
}

.chord-builder-heading__eyebrow {
  font-size: 0.82rem;
}

.chord-builder-heading__hint {
  font-size: 0.86rem;
}

.chord-builder-heading .chord-play-row--top {
  margin: 0;
}

.chord-builder-heading .chord-play-row--top [data-action='play-current-chord'] {
  min-width: 164px;
  min-height: 44px;
  border-radius: 6px;
}

.note-location-menu.chord-theory-controls--primary {
  grid-template-columns: 1.15fr 0.9fr 0.85fr 0.9fr;
  grid-template-areas:
    "root chord fifth seventh"
    "extension add add clear";
  gap: 1rem 1.25rem;
  padding: 0.45rem clamp(1rem, 2vw, 1.5rem) 1.2rem;
  background: transparent;
}

.note-location-menu.chord-theory-controls .root-inline-group {
  grid-template-columns: minmax(90px, 1fr) auto;
}

.note-location-menu.chord-theory-controls .root-accidental-group,
.note-location-menu.chord-theory-controls .extension-accidental-group,
.note-location-menu.chord-theory-controls .upper-extension-accidental-group {
  display: grid;
  grid-auto-flow: column;
  gap: 0.4rem;
}

.note-location-menu.chord-theory-controls .root-accidental-group .btn,
.note-location-menu.chord-theory-controls .extension-accidental-group .btn,
.note-location-menu.chord-theory-controls .upper-extension-accidental-group .btn {
  min-width: 48px;
  height: 38px;
  border-radius: 5px !important;
}

.note-location-menu.chord-theory-controls .form-select {
  height: 38px;
  border-radius: 5px;
  background-color: rgba(10, 13, 16, 0.9);
}

.note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
  grid-area: clear;
  min-height: 38px;
  align-self: end;
  color: rgba(255, 255, 255, 0.72);
  border-color: rgba(255, 255, 255, 0.28);
  border-radius: 5px;
  background: transparent;
}

.chord-name-display.is-prompt {
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(1rem, 1.7vw, 1.22rem);
  font-weight: 500;
}

.voicing-cycle-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(0.45rem, 1vw, 0.75rem);
  width: min(calc(100% - 2rem), 680px);
  margin: 0.35rem auto 0;
  padding: 0.35rem 0;
  border-top: 0;
}

.fretboard-canvas-wrap .fretboard-voicing-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  width: 100%;
  margin: 0;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: #0d0d0d;
}

.voicing-cycle-navigation {
  grid-column: 2;
  display: grid;
  grid-template-columns: 148px 112px 148px;
  align-items: center;
  gap: clamp(0.45rem, 1vw, 0.75rem);
}

.voicing-inversion-control {
  grid-column: 3;
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-left: clamp(1rem, 3vw, 2.5rem);
}

.voicing-cycle-btn {
  min-width: 148px;
  min-height: 34px;
  border-radius: 5px;
  font-size: 0.78rem;
}

.voicing-cycle-label {
  min-width: 112px;
  text-align: center;
  font-size: 0.82rem;
  line-height: 1;
}

.fretboard-canvas-wrap {
  background-color: #0d0d0d;
  background-image: none;
}

.voicing-inversions-label {
  color: rgba(246, 241, 231, 0.88);
  font-size: 0.78rem;
  font-weight: 700;
}

.voicing-inversions-btn {
  position: relative;
  width: 54px;
  min-width: 54px;
  height: 26px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  background: #15191d;
  cursor: pointer;
}

.voicing-inversions-btn::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #a9a9a9;
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.voicing-inversions-btn[aria-pressed='true'] {
  border-color: #f6c24a;
  background: rgba(246, 194, 74, 0.2);
}

.voicing-inversions-btn[aria-pressed='true']::after {
  transform: translateX(28px);
  background: #f6c24a;
}

.voicing-inversions-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.chord-result-panel {
  width: min(calc(100% - 2rem), 680px);
  margin: 0.1rem auto 0.25rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.chord-result-panel .chord-name-display {
  width: 100%;
  margin: 0;
  padding: 0.15rem 0 0.2rem;
  border-bottom: 1px solid rgba(246, 194, 74, 0.26);
  font-size: clamp(1.25rem, 2.1vw, 1.65rem);
  line-height: 1.2;
}

.chord-result-panel .chord-formula-display {
  width: 100%;
  margin: 0;
  padding: 0.35rem 0 0.15rem;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(0.95rem, 1.4vw, 1.12rem);
  line-height: 1.35;
  text-align: center;
}

/* Keep analyser actions and its three result levels visually distinct. */
.analyser-action-row[data-analyser-action] {
  margin-top: 1rem;
  margin-bottom: 0.8rem;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.analyser-action-row[data-analyser-action] .btn {
  min-width: 150px;
}

.chord-result-panel {
  margin-top: 0.35rem;
  margin-bottom: 1rem;
}

.chord-result-panel .chord-name-display {
  padding-block: 0.35rem 0.5rem;
}

.chord-result-panel .chord-formula-display {
  padding-block: 0.55rem 0.45rem;
}

.chord-result-panel .chord-enharmonics-display {
  margin-top: 0.45rem;
  padding: 0.55rem 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

@media (max-width: 480px) {
  .analyser-action-row[data-analyser-action] .btn {
    flex: 1 1 8rem;
    min-width: 0;
  }
}

/* FAQ chrome intentionally follows the site-wide home-page accordion. The chord
   FAQs retain their diagrams and reference material inside the shared format. */
.chord-learning-section {
  padding: clamp(1.4rem, 3vw, 2.6rem) clamp(1rem, 4vw, 3.1rem);
  background-color: #0b0b0b;
  background-image:
    linear-gradient(rgba(11, 11, 11, 0.76), rgba(11, 11, 11, 0.76)),
    url("../images/backgrounds/paisley2.webp");
  background-position: center top;
  background-size: auto, 1920px auto;
  background-repeat: no-repeat, repeat-y;
  background-attachment: scroll, fixed;
}

.chord-learning-section + .chord-learning-section {
  border-top: 1px solid rgba(214, 164, 65, 0.38);
}

.chord-learning-section--reference {
  background-image:
    linear-gradient(180deg, rgba(17, 16, 13, 0.72) 0%, rgba(11, 11, 11, 0.76) 100%),
    url("../images/backgrounds/paisley2.webp");
}

.chord-learning-section--faq {
  display: flex;
  flex-direction: column;
  padding-top: clamp(2rem, 4vw, 3.5rem);
}

.chord-learning-section--faq .chord-learning-section__header { order: 0; }
.chord-learning-section--faq #faq-filters { order: 1; }
.chord-learning-section--faq #faq-chord-theory { order: 2; }

.chord-learning-section__header {
  max-width: 70rem;
  margin: 0 0 clamp(1.2rem, 2.5vw, 2rem);
}

.chord-learning-section__eyebrow {
  margin: 0 0 0.45rem;
  color: #d6a441;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.chord-learning-section__header h2 {
  margin: 0 0 0.5rem;
  color: #f7f3ea;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  line-height: 1.1;
}

.chord-learning-section__header > p:last-child {
  max-width: 68ch;
  margin: 0;
  color: rgba(247, 243, 234, 0.7);
  font-size: 0.95rem;
  line-height: 1.6;
}

.chord-learning-section .faq-block {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  overflow: hidden;
}

.chord-learning-section--faq .faq-block + .faq-block {
  margin-top: 0.75rem;
}

.chord-learning-section--reference #faq-chord-formulas .faq__summary {
  padding-left: 1.4rem;
}

.chord-learning-section--reference #faq-chord-formulas,
.chord-learning-section--reference #faq-chord-formulas .faq__card,
.chord-learning-section--reference #faq-chord-formulas .faq__details,
.chord-learning-section--reference #faq-chord-formulas .faq__content {
  background: rgba(11, 11, 11, 0.34);
}

.faq-block {
  margin: 0;
  padding: 0;
  background: #0b0b0b;
}

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

.faq-block .faq__card {
  width: 100%;
  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-chord-theory .faq__card {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

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

.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;
}

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

#faq-filters .faq__summary::before { content: "01"; }
#faq-chord-theory .faq__summary::before { content: "02"; }

.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%);
}

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

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

.faq__summary-title,
.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;
}

.faq__summary-hint { display: none; }

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

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

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

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

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

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

.faq__step {
  display: none;
}

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

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

.fretboard-canvas-wrap .fretboard-interval-legend {
  width: 100%;
  margin: 0;
  padding: 0.38rem 0.65rem;
  border: 0;
  border-bottom: 1px solid rgba(246, 194, 74, 0.28);
  border-radius: 0;
  background: transparent;
  gap: 0.35rem 0.7rem;
}

.fretboard-canvas-wrap .fretboard-interval-legend .interval-legend-item {
  font-size: 0.75rem;
}

.fretboard-canvas-wrap .fretboard-interval-legend .interval-legend-dot {
  width: 10px;
  height: 10px;
}

@media (max-width: 1040px) {
  .note-location-menu.chord-theory-controls--primary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "root chord"
      "fifth seventh"
      "extension add"
      "clear clear";
  }
}

@media (max-width: 700px) {
  .chord-builder-heading {
    display: grid;
    gap: 0.8rem;
  }

  .chord-builder-heading .chord-play-row--top [data-action='play-current-chord'] {
    width: 100%;
  }

  .fretboard-canvas-wrap .fretboard-voicing-controls {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .voicing-cycle-navigation {
    grid-column: 1;
    grid-template-columns: minmax(0, 1fr) 100px minmax(0, 1fr);
    width: 100%;
  }

  .voicing-inversion-control {
    grid-column: 1;
    justify-self: center;
    margin-left: 0;
  }

  .voicing-cycle-btn {
    min-width: 0;
  }
}

/* Compact chord-tool UI aligned with the fretboard visualiser. */
@media (min-width: 1041px) {
  .fretboard-shell {
    padding: 0.5rem 0.75rem 0;
    border: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .chord-tool-toolbar {
    margin-bottom: 0.35rem;
  }

  .overlay-mode-toggle {
    padding: 2px;
    border-color: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    background: #080909;
  }

  .overlay-mode-toggle .btn {
    min-height: 30px;
    padding: 3px 14px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 650;
  }

  .overlay-mode-toggle .btn.is-selected,
  .overlay-mode-toggle .btn[aria-pressed="true"] {
    box-shadow: none;
  }

  .chord-builder-heading {
    align-items: center;
    padding: 0.35rem 0 0.45rem;
  }

  .chord-builder-heading__eyebrow {
    margin-bottom: 2px;
    font-size: 10px;
    letter-spacing: 0.09em;
  }

  .chord-builder-heading__hint {
    font-size: 11px;
  }

  .chord-builder-heading .chord-play-row--top [data-action='play-current-chord'] {
    min-width: 112px;
    min-height: 32px;
    padding: 3px 11px;
    border-radius: 4px;
    font-size: 11px;
  }

  .fretboard-controls[data-chord-controls-primary] {
    padding: 0;
    border: 0;
    background: transparent;
  }

  .note-location-menu.chord-theory-controls--primary {
    grid-template-columns: 1.3fr repeat(5, minmax(100px, 1fr)) auto;
    grid-template-areas: "root chord fifth seventh extension add clear";
    align-items: end;
    gap: 10px;
    padding: 0.35rem 0 0.55rem;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group {
    gap: 5px;
  }

  .note-location-menu.chord-theory-controls .root-inline-group {
    grid-template-columns: minmax(70px, 1fr) auto;
  }

  .note-location-menu.chord-theory-controls .root-menu-title {
    margin: 0;
    color: rgba(255, 255, 255, 0.66);
    font-size: 10px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.08em;
  }

  .note-location-menu.chord-theory-controls .form-select {
    height: 34px;
    min-height: 34px;
    padding: 4px 28px 4px 10px;
    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;
    box-shadow: none;
  }

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

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

  .note-location-menu.chord-theory-controls .root-accidental-group,
  .note-location-menu.chord-theory-controls .extension-accidental-group,
  .note-location-menu.chord-theory-controls .upper-extension-accidental-group {
    gap: 3px;
  }

  .note-location-menu.chord-theory-controls .root-accidental-group .btn,
  .note-location-menu.chord-theory-controls .extension-accidental-group .btn,
  .note-location-menu.chord-theory-controls .upper-extension-accidental-group .btn {
    min-width: 31px;
    width: 31px;
    height: 34px;
    min-height: 34px;
    padding: 2px;
    border-color: rgba(255, 255, 255, 0.11);
    border-radius: 4px !important;
    font-size: 12px;
  }

  .note-location-menu.chord-theory-controls .btn.is-selected,
  .note-location-menu.chord-theory-controls .btn[aria-pressed="true"],
  .note-location-menu.chord-theory-controls .btn-check:checked + .btn {
    box-shadow: none;
  }

  .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
    min-width: 58px;
    min-height: 28px;
    height: 28px;
    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;
  }

  .upper-extension-prompt {
    min-height: 0;
    margin: 0;
    font-size: 10px;
  }

  .chord-result-panel {
    margin: 0;
    padding: 0.35rem 0;
    border-inline: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .chord-name-display,
  .chord-formula-display,
  .chord-enharmonics-display {
    font-size: 11px;
  }

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

/* Final chord layout restoration with restrained visual refinements. */
@media (min-width: 1041px) {
  .fretboard-shell {
    padding: 0.8rem 1rem;
    border: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .chord-tool-toolbar { margin-bottom: 0.75rem; }

  .overlay-mode-toggle {
    padding: 3px;
    border-color: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    background: #080909;
  }

  .overlay-mode-toggle .btn {
    min-height: 36px;
    padding: 5px 18px;
    border-radius: 4px;
    font-size: 12px;
  }

  .chord-builder-heading { padding: 0.8rem 0 0.65rem; }
  .chord-builder-heading__eyebrow { font-size: 0.72rem; }
  .chord-builder-heading__hint { font-size: 0.78rem; }

  .chord-builder-heading .chord-play-row--top [data-action='play-current-chord'] {
    min-width: 140px;
    min-height: 38px;
    padding: 5px 14px;
    border-radius: 5px;
    font-size: 12px;
  }

  .fretboard-controls[data-chord-controls-primary] {
    padding: 0;
    border: 0;
    background: transparent;
  }

  .note-location-menu.chord-theory-controls--primary {
    grid-template-columns: 1.15fr 0.9fr 0.85fr 0.9fr;
    grid-template-areas:
      "root chord fifth seventh"
      "extension add add clear";
    align-items: stretch;
    gap: 0.75rem 1rem;
    padding: 0.45rem 0 0.8rem;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group { gap: 6px; }

  .note-location-menu.chord-theory-controls .root-inline-group {
    grid-template-columns: minmax(90px, 1fr) auto;
  }

  .note-location-menu.chord-theory-controls .root-menu-title {
    color: rgba(255, 255, 255, 0.68);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
  }

  .note-location-menu.chord-theory-controls .form-select {
    height: 36px;
    min-height: 36px;
    padding: 4px 30px 4px 10px;
    border-color: rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    background-color: #080909;
    background-size: 12px 9px;
    color: rgba(255, 255, 255, 0.88);
    font-size: 12px;
    font-weight: 600;
    box-shadow: none;
  }

  .note-location-menu.chord-theory-controls .root-accidental-group,
  .note-location-menu.chord-theory-controls .extension-accidental-group,
  .note-location-menu.chord-theory-controls .upper-extension-accidental-group { gap: 4px; }

  .note-location-menu.chord-theory-controls .root-accidental-group .btn,
  .note-location-menu.chord-theory-controls .extension-accidental-group .btn,
  .note-location-menu.chord-theory-controls .upper-extension-accidental-group .btn {
    min-width: 36px;
    width: 36px;
    height: 36px;
    min-height: 36px;
    padding: 3px;
    border-radius: 4px !important;
    font-size: 12px;
  }

  .note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
    min-width: 90px;
    min-height: 36px;
    height: 36px;
    padding: 4px 12px;
    border-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.025);
    color: rgba(255, 255, 255, 0.55);
    font-size: 11px;
  }

  .upper-extension-prompt {
    min-height: revert;
    margin: revert;
    font-size: revert;
  }

  .chord-result-panel {
    margin: revert;
    padding: revert;
    border: 0;
    border-radius: 0;
    background: #000;
    box-shadow: none;
  }

  .chord-name-display,
  .chord-formula-display,
  .chord-enharmonics-display { font-size: revert; }

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

/* Prevent the restored chord grid from overflowing the viewport. */
@media (min-width: 1041px) {
  .fretboard-controls[data-chord-controls-primary],
  .note-location-menu.chord-theory-controls--primary {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow: visible;
  }

  .note-location-menu.chord-theory-controls--primary {
    grid-template-columns:
      minmax(0, 1.15fr)
      minmax(0, 0.9fr)
      minmax(0, 0.85fr)
      minmax(0, 0.9fr);
  }

  .note-location-menu.chord-theory-controls--primary > *,
  .note-location-menu.chord-theory-controls .root-inline-group,
  .note-location-menu.chord-theory-controls .triad-inline-group,
  .note-location-menu.chord-theory-controls .seventh-inline-group,
  .note-location-menu.chord-theory-controls .extension-inline-group,
  .note-location-menu.chord-theory-controls .upper-extension-inline-group {
    min-width: 0;
    max-width: 100%;
  }

  .note-location-menu.chord-theory-controls .root-inline-group {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .note-location-menu.chord-theory-controls .form-select {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }
}

/* Align the empty-state tutorial prompt with the full chord tool. */
.chord-result-panel {
  width: 100%;
  max-width: none;
  margin: 0.35rem 0 0.75rem;
}

.chord-result-panel .chord-name-display.is-prompt {
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.85rem 1rem 1rem;
  text-align: center;
}

.chord-result-panel .chord-name-display.is-prompt br {
  display: none;
}

.chord-result-panel .chord-result-prompt-button {
  margin: 0;
}

/* One continuous, near-black paisley surface between navigation and footer. */
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,
.chord-learning-section,
.chord-learning-section--reference,
.chord-learning-section--faq {
  background-color: transparent;
  background-image: none;
}

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

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

/* Let the shared page texture show through the tool wrappers. */
.fretboard-shell,
.fretboard-controls,
.fretboard-controls[data-chord-controls-primary],
.note-location-menu.chord-theory-controls,
.note-location-menu.chord-theory-controls--primary,
.chord-builder-heading,
.chord-result-panel,
.fretboard-canvas-wrap,
.fretboard-canvas-wrap .fretboard-voicing-controls,
.fretboard-canvas-wrap .fretboard-interval-legend {
  background-color: transparent;
  background-image: none;
}

.note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes'] {
  border-color: rgba(246, 194, 74, 0.72);
  background: rgba(246, 194, 74, 0.14);
  color: #f6c24a;
  font-weight: 750;
}

.note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes']:hover,
.note-location-menu.chord-theory-controls--primary > [data-action='clear-all-notes']:focus-visible {
  border-color: #f6c24a;
  background: #f6c24a;
  color: #080808;
  box-shadow: 0 0 0 2px rgba(246, 194, 74, 0.14);
}

.chord-builder-heading .chord-play-row--top [data-action='launch-chord-tutorial'] {
  min-height: 38px;
  padding: 5px 14px;
  border-color: rgba(246, 194, 74, 0.5);
  border-radius: 5px;
  color: #f6c24a;
  font-size: 12px;
  font-weight: 700;
}

.chord-builder-heading .chord-play-row--top [data-action='launch-chord-tutorial']:hover,
.chord-builder-heading .chord-play-row--top [data-action='launch-chord-tutorial']:focus-visible {
  border-color: #f6c24a;
  background: rgba(246, 194, 74, 0.12);
  color: #ffd365;
}

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

/* Chord analyser actions: clear primary action and restrained reset control. */
#fretboard .analyser-action-row[data-analyser-action] {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.7rem;
  margin: 1rem auto 0.9rem;
}

#fretboard .analyser-action-row[data-analyser-action] .btn {
  min-width: 168px;
  min-height: 46px;
  border-radius: 7px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

#fretboard [data-action='analyse-notes'] {
  border-color: rgba(255, 226, 153, 0.92);
  background: linear-gradient(180deg, #ffd36b 0%, #f0b93d 100%);
  color: #19140b;
  box-shadow: 0 7px 18px rgba(246, 194, 74, 0.22);
}

#fretboard [data-action='analyse-notes']:hover,
#fretboard [data-action='analyse-notes']:focus-visible {
  border-color: #ffebb2;
  color: #120f09;
  filter: brightness(1.05);
  transform: translateY(-1px);
}

#fretboard [data-action='clear-analyser'] {
  border-color: rgba(255, 255, 255, 0.48);
  background: rgba(255, 255, 255, 0.035);
  color: rgba(255, 255, 255, 0.9);
}

#fretboard [data-action='clear-analyser']:hover,
#fretboard [data-action='clear-analyser']:focus-visible {
  border-color: rgba(255, 216, 126, 0.82);
  background: rgba(246, 194, 74, 0.12);
  color: #ffe2a2;
}

/* Static, task-focused guidance placed after the interactive tool. */
.chord-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);
}

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

@media (max-width: 480px) {
  #fretboard .analyser-action-row[data-analyser-action] {
    gap: 0.5rem;
  }

  #fretboard .analyser-action-row[data-analyser-action] .btn {
    min-width: 0;
    flex: 1 1 0;
  }
}

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