@font-face {
  font-display: swap;
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  src: url("../fonts/inter-latin-variable.woff2") format("woff2");
}

.visually-hidden {
  block-size: 1px;
  clip-path: inset(50%);
  inline-size: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
}

:root {
  --accent: #448faf;
  --accent-dark: #277594;
  --accent-text: #277594;
  --count-text: #1f6682;
  --accent-soft: #e2f0f6;
  --header: #659bbd;
  --page: #edf2f6;
  --surface: #fff;
  --surface-solid: #fff;
  --text: #182531;
  --muted: #5f7080;
  --subtle: #758695;
  --line: #dce4ea;
  --toolbar: #e6edf2;
  --toolbar-active: #fff;
  --shadow: 0 3px 12px rgba(35,62,78,.055);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --page-gutter: clamp(6px, 1.8vw, 9px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html {
  color-scheme: light;
  scrollbar-gutter: stable;
}
body {
  background: var(--page);
  color: var(--text);
  font-family:
    "Inter",
    "Helvetica Neue",
    Arial,
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    "Noto Sans JP",
    sans-serif;
  line-break: strict;
  min-height: 100dvh;
  overflow-x: hidden;
  overflow-wrap: anywhere;
  word-break: normal;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
button { color: inherit; cursor: pointer; font: inherit; touch-action: manipulation; }
button:focus-visible, summary:focus-visible, [role="button"]:focus-visible {
  outline: 3px solid #1f5f7f;
  outline-offset: 2px;
}

.app-shell { display: grid; min-height: 100dvh; place-items: start center; }
.app-frame {
  background:
    radial-gradient(circle at 80% 5%, rgba(255,255,255,.65), transparent 260px),
    var(--page);
  box-shadow: 0 0 36px rgba(30,60,80,.1);
  min-height: 100dvh;
  overflow: hidden;
  position: relative;
  width: min(100%, 480px);
}

.app-header {
  align-items: center;
  background: linear-gradient(135deg, #5b94b5, #6fa6c5);
  color: #fff;
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 1fr) auto;
  height: 54px;
  padding-block: 7px;
  padding-inline: 12px;
  position: sticky;
  inset-block-start: 0;
  z-index: 80;
}
.app-header__brand {
  align-items: center;
  display: flex;
  min-width: 0;
}
.app-header__brand h1 {
  font-size: 13px;
  font-weight: 650;
  line-height: 1;
  max-width: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.header-actions {
  display: grid;
  gap: 4px;
  grid-auto-flow: column;
}
.header-button {
  align-content: center;
  align-items: center;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 9px;
  color: #fff;
  display: grid;
  gap: 1px;
  height: 36px;
  justify-items: center;
  line-height: 1;
  min-width: 38px;
  padding: 3px 4px;
  position: relative;
}
.header-button::before { content: ""; inset: -2px; position: absolute; }
.header-play-button:disabled { opacity: .38; }
.header-play-button.playing {
  background: rgba(255,255,255,.3);
  transform: scale(.96);
}
.header-button svg {
  height: 14px;
  width: 14px;
}
.header-play-button svg {
  transform: translateX(1px);
}
.header-settings-button svg {
  transform: scale(.86);
  transform-origin: center;
}
.header-button .header-icon-fill { fill: currentColor; stroke: none; }
.header-button small { font-size: 9px; font-weight: 700; line-height: 1; }
.header-button[aria-pressed="true"] { background: #fff; color: var(--accent-dark); }

.app-scroll {
  padding-block: 7px calc(10px + var(--safe-bottom));
  padding-inline: var(--page-gutter);
}
.finder-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-block-end: 9px;
  overflow: hidden;
}
.finder-card--input {
  padding-block: 9px 8px;
  padding-inline: 8px;
}
.finder-card--results {
  padding-block: 9px 8px;
  padding-inline: 8px;
}

.section-toolbar {
  align-items: center;
  background: var(--toolbar);
  border-color: var(--line);
  display: grid;
  gap: 5px;
}
.section-toolbar--input {
  border-radius: 9px;
  grid-template-columns: auto minmax(0, 1fr) 42px;
  margin-block-end: 5px;
  padding-block: 4px;
  padding-inline: 6px;
}
.section-toolbar--results {
  border-radius: 9px;
  grid-template-columns: auto minmax(0, 1fr) 42px;
  margin-block-end: 5px;
  padding-block: 4px;
  padding-inline: 6px;
}
.card-heading {
  align-items: center;
  display: grid;
  grid-template-columns: auto auto;
  min-width: 0;
  white-space: nowrap;
}
.card-heading__step {
  align-items: center;
  background: var(--accent-dark);
  border-radius: 50%;
  color: #fff;
  display: grid;
  font-size: 10px;
  font-weight: 750;
  height: 24px;
  place-items: center;
  margin-inline-end: 5px;
  width: 24px;
}
.card-heading h2 { font-size: 12px; font-weight: 700; letter-spacing: .005em; line-height: 1.2; }
.clear-button {
  background: rgba(255,255,255,.72);
  border: 0;
  border-radius: 6px;
  color: var(--accent-dark);
  font-size: 9px;
  font-weight: 700;
  height: 36px;
  width: 42px;
}
.clear-button:disabled { opacity: .3; }

.view-tabs, .result-tabs {
  background: var(--toolbar);
  border-radius: 8px;
  display: grid;
  gap: 3px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 3px;
}
.view-tabs { margin-block-end: 0; }
.view-tabs button, .result-tabs button {
  background: transparent;
  border: 0;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  min-height: 36px;
  min-width: 0;
}
.view-tabs button.active, .result-tabs button.active {
  background: var(--toolbar-active);
  box-shadow: 0 1px 4px rgba(27,38,49,.1);
  color: var(--accent-text);
}

.instrument-stage {
  height: 194px;
  min-width: 0;
  overflow: hidden;
}
.instrument-stage[data-view="notes"] {
  align-items: center;
  display: grid;
  height: 194px;
}
.instrument-stage[data-view="notes"] .note-grid {
  background: #f6f8fa;
  border: 1px solid #e8eef2;
  border-radius: 10px;
  height: 140px;
  padding-block: 8px;
  padding-inline: 4px;
}
.note-grid {
  align-content: center;
  display: grid;
  gap: 5px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  height: 100%;
}
.note-pad {
  aspect-ratio: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  height: 50px;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
  position: relative;
}
.note-pad span { display: block; font-size: 13px; font-weight: 750; line-height: 1.1; }
.note-pad small { color: var(--muted); display: block; font-size: 9px; font-weight: 600; line-height: 1; margin-block-start: 1px; }
.note-pad.selected {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.18);
  color: #fff;
}
.note-pad.selected small { color: rgba(255,255,255,.92); }

.svg-instrument { padding-block: 1px 4px; width: 100%; }
.piano-scroll {
  cursor: grab;
  height: 100%;
  overflow-x: auto;
  padding-block: 10px 4px;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  touch-action: pan-x;
}
.piano-scroll:active { cursor: grabbing; }
.piano-scroll.is-dragging { cursor: grabbing; user-select: none; }
.piano-scroll::-webkit-scrollbar { display: none; }
.piano-svg { display: block; height: 100%; min-width: 920px; width: 920px; }
.svg-key, .svg-fret-cell { cursor: pointer; }
.svg-key:focus, .svg-fret-cell:focus { outline: 0; }
.svg-key:focus-visible, .svg-fret-cell:focus-visible { outline: 5px solid #1f5f7f; outline-offset: -5px; }
.piano-note-label { fill: #5f7080; font-size: 18px; font-weight: 750; pointer-events: none; }
.piano-note-label.is-active { fill: #1f607f; }
.piano-black-label { fill: #fff; font-size: 14px; font-weight: 750; pointer-events: none; }
.fret-scroll {
  cursor: grab;
  height: 100%;
  overflow-x: auto;
  padding-block: 9px 1px;
  scrollbar-width: none;
  touch-action: pan-x;
}
.fret-scroll:active { cursor: grabbing; }
.fret-scroll.is-dragging { cursor: grabbing; user-select: none; }
.fret-scroll::-webkit-scrollbar { display: none; }
.fretboard-svg { display: block; height: 100%; min-width: 2000px; width: 2000px; }
.fret-marker { filter: drop-shadow(0 1px 1px rgba(20,54,72,.25)); }
.fret-note-label { fill: #fff; font-weight: 800; pointer-events: none; }
.fret-note-label:not(.is-fallback) {
  paint-order: stroke fill;
  stroke: rgba(24,76,99,.26);
  stroke-width: .7px;
}
.fret-marker.is-fallback { stroke-dasharray: none; }
.fret-note-label.is-fallback { fill: var(--accent-dark); }
.open-string-target {
  fill: rgba(249,252,253,.98);
  stroke: rgba(74,145,181,.52);
  stroke-width: 1.5px;
}
.open-string-label {
  fill: var(--accent-dark);
  font-weight: 750;
  pointer-events: none;
}
@media (hover: hover) {
  .svg-fret-cell:hover .open-string-target {
    fill: #edf6fa;
    stroke: var(--accent);
  }
}
.fret-number { fill: #52687a; font-size: 14px; font-weight: 750; pointer-events: none; }

.result-tabs {
  border-radius: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 3px;
}
.result-tabs button { min-height: 36px; }
.result-tabs span { background: rgba(68,143,175,.12); border-radius: 99px; color: var(--count-text); font-size: 9px; font-weight: 700; margin-inline-start: 3px; padding: 2px 5px; }
.results-list {
  background: #f4f7f9;
  block-size: 236px;
  border-radius: 9px;
  gap: 6px;
  min-height: 236px;
  min-width: 0;
  overflow: hidden;
  padding-block: 4px 40px;
  padding-inline: 0;
  position: relative;
}
.results-list.is-expanded { block-size: auto; }
.results-list.has-expanded-scale {
  block-size: auto;
  min-height: 236px;
  overflow: visible;
}
.results-list:not(.is-chord-grid) {
  align-content: start;
  display: grid;
}
.results-list.is-chord-grid {
  align-content: start;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 100%;
  width: 100%;
}
.is-chord-grid .top-match {
  grid-column: auto;
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
}
.is-chord-grid .result-card:not(.top-match) {
  min-width: 0;
}
.is-chord-grid .result-card:not(.top-match) .card-main {
  align-items: center;
  block-size: 88px;
  display: flex;
  min-height: 88px;
  padding-block: 8px 7px;
  padding-inline: 9px;
  position: relative;
}
.is-chord-grid .result-card:not(.top-match) .result-name { min-width: 0; width: 100%; }
.is-chord-grid .result-card:not(.top-match) .result-name strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.is-chord-grid .result-card:not(.top-match) .result-name p {
  display: none;
}
.result-card, .scale-card {
  background: rgba(255,255,255,.76);
  border: 1px solid rgba(199,212,221,.82);
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(35,62,78,.035);
  min-width: 0;
  overflow: hidden;
}
.result-card.top-match, .scale-card.top-match {
  background: #fff;
  border-color: rgba(68,143,175,.24);
  box-shadow: 0 2px 6px rgba(35,75,96,.06);
}
.card-main {
  align-items: center;
  background: transparent;
  border: 0;
  display: grid;
  gap: 9px;
  grid-template-columns: 20px minmax(0, 1fr);
  min-height: 49px;
  padding-block: 6px;
  padding-inline: 10px;
  text-align: start;
  width: 100%;
}
.result-title-row {
  align-items: center;
  display: grid;
  gap: 6px;
  grid-template-columns: minmax(0, 1fr) auto;
  min-height: 18px;
}
.chord-detail-trigger {
  background: transparent;
  border: 0;
  column-gap: 2px;
  cursor: pointer;
  padding: 0;
  position: relative;
}
.chord-detail-trigger > span {
  transform: translateY(-.5px);
}
.chord-detail-trigger::before {
  content: "";
  inset: -8px 0;
  position: absolute;
}
.chord-detail-trigger svg {
  fill: none;
  inline-size: 9px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.35;
  transform: translateY(-.25px);
}
.chord-detail-trigger:hover {
  color: var(--accent-dark);
}
.chord-detail-trigger:focus-visible {
  border-radius: 4px;
  color: var(--accent-dark);
  outline: 2px solid rgba(39,117,148,.5);
  outline-offset: 3px;
}
.result-name strong { font-size: 18px; font-weight: 750; letter-spacing: -.025em; line-height: 1; }
.scale-body p {
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
  line-height: 1.35;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.scale-card {
  block-size: 58px;
  display: grid;
  gap: 7px;
  grid-template-columns: minmax(0, 1fr);
  min-height: 58px;
  padding-block: 0;
  padding-inline: 10px;
}
.scale-title {
  align-items: start;
  block-size: 15px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-height: 15px;
}
.scale-body {
  align-content: start;
  display: grid;
  gap: 5px;
  min-height: 0;
  min-width: 0;
  padding-block: 9px 5px;
  position: relative;
}
.scale-title strong {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.scale-interpretation-names {
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.35;
  overflow-wrap: anywhere;
  padding-inline-end: 28px;
}
.scale-notes {
  display: grid;
  gap: 2px;
  grid-template-columns: repeat(auto-fit, minmax(19px, 1fr));
}
.scale-notes span {
  background: #edf1f4;
  border-radius: 4px;
  color: #586b79;
  font-size: 10px;
  font-weight: 600;
  min-width: 0;
  padding: 2px;
  text-align: center;
}
.scale-notes span.chosen { background: var(--accent-dark); color: #fff; font-weight: 700; }
.empty-state {
  align-content: center;
  color: var(--muted);
  display: grid;
  justify-items: center;
  min-height: 215px;
  padding-block: 20px 30px;
  padding-inline: 24px;
  text-align: center;
  width: 100%;
}
.results-list:has(.empty-state) {
  block-size: 236px;
  min-height: 236px;
  padding-block: 0;
}
.empty-state > span { color: var(--accent); display: block; font-size: 27px; }
.empty-state h3 { color: var(--text); font-size: 14px; margin-block: 8px 5px; }
.empty-state p { font-size: 10px; line-height: 1.6; max-width: 230px; }
.results-footer {
  align-items: center;
  background: rgba(248,250,252,.96);
  block-size: 40px;
  display: grid;
  gap: 6px;
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 1fr) auto;
  inset-block-end: 0;
  inset-inline: 0;
  min-height: 40px;
  padding-block: 2px;
  padding-inline: 0;
  position: absolute;
  border-radius: 7px 7px 0 0;
}
.results-footer p { color: var(--muted); font-size: 11px; font-weight: 650; text-align: center; }
.results-footer p:not(:only-child) {
  grid-column: 1 / -1;
  line-height: 1.3;
}
.results-footer p:only-child {
  align-items: center;
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(68,143,175,.18);
  border-radius: 7px;
  display: grid;
  grid-column: 1 / -1;
  margin-inline: 0;
  min-height: 36px;
}
.results-footer small { color: var(--muted); font-size: 10px; font-weight: 600; white-space: nowrap; }
.more-results-button {
  background: #fff;
  border: 1px solid rgba(68,143,175,.28);
  border-radius: 7px;
  box-shadow: 0 1px 3px rgba(35,75,96,.07);
  color: var(--accent-dark);
  font-size: 11px;
  font-weight: 700;
  min-height: 36px;
  width: 100%;
}
.more-results-button:only-child {
  grid-column: 1 / -1;
  margin-inline: 0;
  width: 100%;
}
.more-results-button:active { background: var(--accent-soft); }

.is-chord-grid .top-match .result-name {
  display: block;
}
.fit-label {
  align-items: center;
  color: var(--accent-dark);
  block-size: 16px;
  display: inline-grid;
  font-size: 9px;
  font-weight: 700;
  grid-auto-flow: column;
  justify-content: end;
  line-height: 1;
  place-items: center;
  white-space: nowrap;
}
.fit-label.is-full-exact {
  background: var(--accent-soft);
  border: 1px solid rgba(68,143,175,.24);
  border-radius: 99px;
  padding-inline: 5px;
}
.chord-notes,
.top-match .chord-notes {
  align-items: stretch;
  block-size: 34px;
  display: grid;
  gap: 3px;
  grid-template-columns: repeat(var(--tone-count), minmax(0, 1fr));
  margin-block-start: 5px;
  max-width: 100%;
  min-height: 34px;
  overflow: hidden;
}
.scale-title strong::-webkit-scrollbar { display: none; }
.chord-notes .chord-tone {
  align-content: center;
  background: transparent;
  border: 1px solid rgba(68,143,175,.26);
  border-radius: 3px;
  box-sizing: border-box;
  color: var(--accent-dark);
  display: grid;
  gap: 2px;
  inline-size: auto;
  max-width: 100%;
  min-height: 30px;
  min-width: 0;
  overflow: hidden;
  padding-block: 2px 1px;
  padding-inline: 1px;
  text-align: center;
}
.chord-tone b,
.chord-tone small {
  font-size: 10px;
  line-height: 1.05;
  max-width: 100%;
  overflow: hidden;
  text-overflow: clip;
  white-space: nowrap;
}
.chord-tone b { font-weight: 650; }
.chord-tone small {
  color: var(--muted);
  font-size: 9px;
  font-weight: 550;
  letter-spacing: -.03em;
  line-height: 1.1;
}
.chord-tone.is-omitted small { letter-spacing: -.16em; }
.chord-notes .is-root-tone {
  background: rgba(226,240,246,.62);
  border-color: rgba(68,143,175,.52);
  box-shadow: none;
}
.chord-notes .is-root-tone b { color: var(--accent-dark); }
.chord-notes .is-root-tone small {
  color: var(--accent-dark);
}
.chord-notes .is-omitted {
  background: rgba(255,255,255,.72);
  border-color: #aab8c1;
  border-style: dashed;
  color: var(--muted);
}
.chord-notes .is-completion {
  background: rgba(255,255,255,.72);
  border-color: #aab8c1;
  border-style: dashed;
}
.chord-notes .is-external-bass {
  background: transparent;
  border-color: rgba(68,143,175,.26);
}
.chord-notes .is-added {
  background: transparent;
  border-color: rgba(68,143,175,.14);
}
.chord-notes .is-bass-tone {
  background: transparent;
  border-color: rgba(68,143,175,.26);
}
.chord-notes .is-completion b,
.chord-notes .is-added b { color: var(--accent-dark); }
.equivalent-names {
  color: var(--muted);
  font-size: 9px;
  font-weight: 650;
  line-height: 1.2;
  margin-block-start: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.is-chord-grid .result-card:not(.top-match) .equivalent-names { display: none; }
.is-chord-grid .result-card:not(.top-match) .result-title-row {
  gap: 3px;
  grid-template-columns: minmax(0, 1fr) auto;
}
.is-chord-grid .result-card:not(.top-match) .fit-label {
  font-size: 9px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.is-chord-grid .result-card:not(.top-match) .chord-notes {
  margin-block-start: 7px;
}
.is-chord-grid .result-card:not(.top-match) .chord-tone {
  padding-inline: 1px;
}
.is-chord-grid .top-match .card-main {
  align-items: center;
  block-size: 88px;
  display: flex;
  min-height: 88px;
  padding-block: 8px 7px;
  padding-inline: 9px;
  position: relative;
}
.is-chord-grid .top-match .result-name {
  min-width: 0;
  width: 100%;
}
.is-chord-grid .top-match .result-name strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.is-chord-grid .top-match .result-title-row {
  gap: 3px;
  grid-template-columns: minmax(0, 1fr) auto;
}
.is-chord-grid .top-match .chord-notes {
  margin-block-start: 7px;
  max-width: 100%;
}
.is-chord-grid .top-match .chord-tone {
  padding-inline: 1px;
}
.is-chord-grid .result-card.has-7-tones .card-main,
.is-chord-grid .result-card.has-8-tones .card-main {
  padding-inline: 5px;
}
.chord-notes.has-6-tones { gap: 2px; }
.chord-notes.has-7-tones,
.chord-notes.has-8-tones {
  gap: 1px;
}
.chord-notes.has-7-tones .chord-tone,
.chord-notes.has-8-tones .chord-tone {
  gap: 1px;
  padding-inline: 0;
}
.chord-notes.has-7-tones .chord-tone b,
.chord-notes.has-7-tones .chord-tone small,
.chord-notes.has-8-tones .chord-tone b,
.chord-notes.has-8-tones .chord-tone small {
  font-size: 9px;
  letter-spacing: -.02em;
  line-height: 1;
}
.scale-title {
  display: grid;
  min-width: 0;
}
.scale-title.has-interpretations-toggle {
  padding-inline-end: 32px;
}
.scale-title__summary,
.scale-title__primary {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.scale-title__summary,
.scale-title__primary,
.scale-interpretation-names {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.35;
}
.scale-title__primary { display: none; }
.scale-card.is-interpretations-expanded .scale-title__summary { display: none; }
.scale-card.is-interpretations-expanded .scale-title__primary { display: block; }
.scale-interpretations-toggle {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 50%;
  color: var(--accent-dark);
  display: inline-grid;
  font-size: 15px;
  inline-size: 32px;
  inset-block-start: 0;
  inset-inline-end: 0;
  min-block-size: 32px;
  padding: 0;
  place-items: center;
  position: absolute;
}
.scale-interpretations-toggle[hidden] { display: none; }
.scale-interpretations-toggle:focus-visible {
  outline-width: 2px;
  outline-offset: -4px;
}
.scale-interpretations-toggle span {
  align-items: center;
  background: rgba(39,117,148,.08);
  border-radius: 50%;
  display: inline-grid;
  block-size: 18px;
  inline-size: 18px;
  justify-items: center;
}
.scale-interpretations-toggle span::before {
  border-block-end: 1.5px solid currentColor;
  border-inline-end: 1.5px solid currentColor;
  content: "";
  block-size: 6px;
  inline-size: 6px;
  transform: translateY(-2px) rotate(45deg);
  transition: transform .16s ease;
}
.scale-interpretations-toggle:hover span { background: rgba(39,117,148,.14); }
.scale-card.is-interpretations-expanded {
  block-size: auto;
  min-height: 58px;
  overflow: visible;
}
.scale-card.is-interpretations-expanded .scale-interpretations-toggle span::before {
  transform: translateY(2px) rotate(-135deg);
}
.promo-banner {
  margin-block: 8px 10px;
  margin-inline: 0;
  padding-inline: 0;
}
.feature-promo-unit {
  align-items: center;
  background: rgba(255,255,255,.62);
  border: 1px solid rgba(27,38,49,.09);
  border-radius: 9px;
  display: grid;
  gap: 7px;
  justify-items: center;
  min-height: 102px;
  padding-block: 18px;
  padding-inline: 12px;
  position: relative;
  text-decoration: none;
}
.promo-label {
  background: rgba(255,255,255,.92);
  border: 1px solid rgba(0,0,0,.14);
  border-radius: 3px;
  color: #526573;
  font-size: 9px;
  font-weight: 650;
  inset-block-start: 6px;
  inset-inline-end: 6px;
  padding: 2px 5px;
  position: absolute;
}
.promo-button {
  background: var(--accent-dark);
  border-radius: 24px;
  box-shadow: 0 3px 9px rgba(27,54,72,.18);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  min-height: 34px;
  padding-block: 9px;
  padding-inline: 18px;
  text-align: center;
  width: min(100%, 286px);
}
.feature-promo-unit small { color: var(--muted); font-size: 10px; font-weight: 500; line-height: 1.35; }

.helper-content {
  display: grid;
  gap: 7px;
  margin-block-start: 12px;
}
.helper-item {
  background: rgba(255,255,255,.64);
  border: 1px solid rgba(199,212,221,.78);
  border-radius: 9px;
  box-shadow: 0 1px 4px rgba(35,62,78,.035);
  overflow: clip;
}
.helper-summary {
  align-items: center;
  color: #526878;
  cursor: pointer;
  display: grid;
  font-size: clamp(12.5px, 3.4vw, 13.5px);
  font-weight: 750;
  min-height: 44px;
  padding-block: 11px;
  padding-inline: 14px 40px;
  position: relative;
  list-style: none;
}
.helper-summary::-webkit-details-marker { display: none; }
.helper-summary::marker { content: ""; }
.helper-summary::after {
  border-block-end: 2px solid var(--accent);
  border-inline-end: 2px solid var(--accent);
  content: "";
  height: 7px;
  inset-block-start: 50%;
  inset-inline-end: 16px;
  position: absolute;
  transform: translateY(-65%) rotate(45deg);
  transform-origin: center;
  transition: transform .18s ease;
  width: 7px;
}
.helper-item[open] > .helper-summary {
  border-block-end: 1px solid var(--line);
}
.helper-item[open] > .helper-summary::after { transform: translateY(-30%) rotate(-135deg); }
.helper-panel { background: rgba(255,255,255,.52); }
.helper-steps { display: grid; }
.helper-step {
  display: grid;
  gap: 9px;
  grid-template-columns: 22px minmax(0, 1fr);
  padding-block: 12px;
  padding-inline: 14px;
}
.helper-step + .helper-step { border-block-start: 1px solid var(--line); }
.helper-step__number {
  background: var(--accent-soft);
  border: 1px solid rgba(68,143,175,.18);
  border-radius: 50%;
  color: var(--accent-dark);
  display: grid;
  font-size: 12px;
  font-weight: 750;
  height: 22px;
  place-items: center;
  width: 22px;
}
.helper-step__body { min-width: 0; }
.helper-step__body h3 { color: var(--text); font-size: 13px; font-weight: 800; line-height: 1.4; }
.helper-step__lead {
  color: #425c6e;
  font-size: clamp(12px, 3.2vw, 12.5px);
  line-height: 1.55;
  margin-block-start: 3px;
}
.helper-step__note {
  background: rgba(232,240,245,.72);
  border-radius: 6px;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.5;
  margin-block-start: 7px;
  padding-block: 6px;
  padding-inline: 8px;
}
.helper-definitions { padding-block: 8px 10px; padding-inline: 10px; }
.helper-definitions dl { display: grid; gap: 6px; }
.helper-definition {
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(199,212,221,.72);
  border-radius: 7px;
  display: grid;
  gap: 9px;
  grid-template-columns: minmax(96px, 116px) minmax(0, 1fr);
  padding-block: 10px;
  padding-inline: 10px;
}
.helper-definition dt { color: var(--text); font-size: 12px; font-weight: 750; line-height: 1.5; }
.helper-definition dd { color: #536a7a; font-size: 12px; line-height: 1.55; min-width: 0; }
.tool-notice {
  color: var(--muted);
  display: grid;
  font-size: 11px;
  font-weight: 500;
  justify-items: center;
  line-height: 1.65;
  padding-block: 12px 2px;
  padding-inline: 12px;
  text-align: center;
}
.tool-notice a {
  color: var(--accent-dark);
  font-size: 11px;
  font-weight: 700;
  margin-block-start: 3px;
  text-decoration: none;
}
.helper-related {
  border-block: 1px solid var(--line);
  display: grid;
  margin-block-start: 14px;
  margin-inline: 4px;
}
.helper-related a {
  align-items: center;
  border-block-end: 1px solid var(--line);
  color: var(--text);
  display: grid;
  font-size: 12.5px;
  font-weight: 700;
  grid-template-columns: minmax(0, 1fr) auto;
  min-height: 44px;
  padding-inline: 10px;
  text-decoration: none;
}
.helper-related a:last-child { border-block-end: 0; }
.helper-related a::after { color: var(--accent); content: "›"; font-size: 17px; line-height: 1; }
.tool-footer {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.65;
  padding-block: 16px 20px;
  text-align: center;
}
.tool-footer__copyright { opacity: 1; }
.tool-footer__copyright a { color: inherit; text-decoration: none; }

.settings-dialog {
  background: rgba(15,27,36,.42);
  height: 100dvh;
  inset-block: 0;
  inset-inline-start: 50%;
  overflow: hidden;
  position: fixed;
  transform: translateX(-50%);
  transition: opacity .3s ease;
  width: min(100%, 480px);
  z-index: 300;
  opacity: 0;
  pointer-events: none;
}

body.has-modal { overflow: hidden; }
.chord-detail-dialog {
  align-items: center;
  background: rgba(18,31,42,.42);
  display: grid;
  inset: 0;
  justify-items: center;
  opacity: 0;
  padding: max(10px, env(safe-area-inset-top)) 8px max(10px, env(safe-area-inset-bottom));
  pointer-events: none;
  position: fixed;
  transition: opacity .18s ease;
  z-index: 320;
}
.chord-detail-dialog.is-active {
  opacity: 1;
  pointer-events: auto;
}
.chord-detail-panel {
  background: var(--surface);
  border: 1px solid rgba(199,212,221,.9);
  border-radius: 17px;
  box-shadow: 0 18px 44px rgba(18,42,57,.22);
  display: grid;
  gap: 10px;
  inline-size: min(468px, calc(100vw - 12px));
  max-block-size: calc(100dvh - 20px);
  overflow: auto;
  padding: 14px 12px 12px;
  transform: translateY(8px);
  transition: transform .18s ease;
}
.chord-detail-dialog.is-active .chord-detail-panel { transform: translateY(0); }
.chord-detail-header {
  align-items: center;
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 1fr) 30px;
}
.chord-detail-close {
  background: #f7f9fa;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  display: grid;
  inline-size: 30px;
  min-block-size: 30px;
  padding: 0;
  place-items: center;
}
.chord-detail-close svg {
  fill: none;
  inline-size: 16px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.6;
}
.chord-detail-close:focus-visible {
  outline: 2px solid var(--accent-dark);
  outline-offset: 2px;
}
.chord-detail-summary {
  align-items: center;
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, max-content) auto;
  justify-content: start;
  min-width: 0;
}
.chord-detail-summary h2 {
  color: var(--text);
  font-size: 20px;
  font-weight: 760;
  letter-spacing: -.025em;
  line-height: 1.1;
  min-width: 0;
  overflow-wrap: anywhere;
}
.chord-detail-summary span {
  color: var(--accent-dark);
  font-size: 10px;
  font-weight: 720;
  line-height: 1.2;
}
.chord-detail-layout {
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  min-width: 0;
}
.chord-detail-pane {
  border: 1px solid rgba(199,212,221,.82);
  border-radius: 11px;
  display: grid;
  min-width: 0;
  padding: 9px;
}
.chord-detail-pane h3 {
  color: var(--text);
  font-size: 11.5px;
  font-weight: 750;
  line-height: 1.3;
  margin-block-end: 7px;
}
.chord-detail-groups {
  align-content: stretch;
  display: grid;
  min-width: 0;
}
.chord-detail-group {
  align-items: center;
  border-block-start: 1px solid rgba(220,228,234,.8);
  display: grid;
  gap: 5px;
  grid-template-columns: 43px minmax(0, 1fr);
  min-block-size: 31px;
  padding-block: 4px;
}
.chord-detail-group:first-child { border-block-start: 0; }
.chord-detail-group > span {
  color: var(--muted);
  font-size: 9.5px;
  font-weight: 650;
  line-height: 1.25;
  white-space: nowrap;
}
.chord-detail-group > div {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  min-width: 0;
}
.chord-detail-group--triad > div {
  flex-wrap: nowrap;
  gap: 2px;
}
.chord-detail-group--triad .chord-detail-tone {
  min-inline-size: 25px;
  padding-inline: 1px;
}
.chord-detail-tone {
  align-items: center;
  background: var(--accent-soft);
  border: 1px solid rgba(68,143,175,.2);
  border-radius: 5px;
  color: var(--accent-dark);
  display: inline-grid;
  justify-items: center;
  min-inline-size: 26px;
  padding: 3px 2px;
}
.chord-detail-tone b,
.chord-detail-tone small {
  font-size: 9.5px;
  line-height: 1.12;
}
.chord-detail-tone small {
  color: var(--muted);
  font-weight: 550;
  white-space: nowrap;
}
.chord-detail-tone.is-omitted,
.chord-detail-tone.is-completion {
  background: #fff;
  border-style: dashed;
}
.chord-detail-tone.is-added {
  background: #f7fafb;
  border-color: rgba(111,129,143,.45);
}
.chord-detail-empty {
  color: var(--subtle);
  font-size: 11px;
  line-height: 1;
}
.chord-detail-pane--staff {
  align-content: stretch;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
}
.chord-detail-staff {
  align-self: center;
  display: block;
  inline-size: 100%;
  max-block-size: 180px;
  min-width: 0;
}
.detail-staff__line,
.detail-staff__ledger {
  stroke: #526270;
  stroke-linecap: round;
  stroke-width: 1.2;
}
.detail-staff__clef {
  fill: var(--text);
}
.detail-staff__note path {
  fill: var(--text);
}
.chord-detail-actions {
  display: grid;
  gap: 7px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.chord-detail-play {
  align-items: center;
  border: 1px solid rgba(39,117,148,.45);
  border-radius: 10px;
  display: grid;
  font-size: 12px;
  font-weight: 750;
  gap: 6px;
  grid-template-columns: 18px auto;
  justify-content: center;
  min-block-size: 44px;
  padding-inline: 8px;
}
.chord-detail-play svg {
  block-size: 18px;
  inline-size: 18px;
}
.chord-detail-play path { fill: currentColor; }
.chord-detail-play--notes {
  background: var(--accent-dark);
  color: #fff;
}
.chord-detail-play--chord {
  background: var(--accent-soft);
  color: var(--accent-dark);
}
.chord-detail-play.playing {
  filter: brightness(.92);
  transform: translateY(1px);
}
.chord-detail-play:focus-visible {
  outline: 2px solid var(--accent-dark);
  outline-offset: 2px;
}
.settings-dialog.is-active { opacity: 1; pointer-events: auto; }
.settings-panel {
  background: #f7f9fb;
  border-end-start-radius: 18px;
  border-start-start-radius: 18px;
  box-shadow: -5px 0 28px rgba(17,35,47,.2);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
  inset-block: 0;
  inset-inline-end: 0;
  margin: 0;
  max-width: 320px;
  overflow: hidden;
  position: absolute;
  width: min(84vw, 320px);
  transform: translate3d(100%,0,0);
  transition: transform .35s cubic-bezier(.2,0,0,1);
  will-change: transform;
}
.settings-dialog.is-active .settings-panel { transform: translate3d(0,0,0); }
.settings-header {
  align-items: center;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  padding-block: 20px 14px;
  padding-inline: 18px;
}
.settings-header h2 { font-size: 18px; font-weight: 750; }
.settings-close {
  background: var(--toolbar);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  font-size: 18px;
  height: 34px;
  position: relative;
  width: 34px;
}
.settings-close::before { content: ""; inset: -3px; position: absolute; }
.settings-content {
  align-content: start;
  display: grid;
  gap: 11px;
  min-height: 0;
  overflow-y: auto;
  padding-block: 4px 20px;
  padding-inline: 16px;
}
.setting-row {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  padding: 14px;
}
.setting-row--toggle {
  align-items: center;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
}
.setting-row--toggle input {
  appearance: none;
  accent-color: var(--accent);
  background: #cbd6e2;
  border-radius: 99px;
  height: 24px;
  position: relative;
  transition: background .16s ease;
  width: 42px;
}
.setting-row--toggle input::after {
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(27,38,49,.2);
  content: "";
  height: 20px;
  inset-block-start: 2px;
  inset-inline-start: 2px;
  position: absolute;
  transition: transform .16s ease;
  width: 20px;
}
.setting-row--toggle input:checked { background: var(--accent); }
.setting-row--toggle input:checked::after { transform: translateX(18px); }
.setting-row--select { display: grid; gap: 10px; }
.setting-row select {
  appearance: auto;
  background: #fff;
  border: 2px solid rgba(68,143,175,.55);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  min-height: 42px;
  padding: 0 10px;
  width: 100%;
}
.setting-row__note {
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
  line-height: 1.45;
}
.settings-related { display: grid; gap: 10px; }
.setting-menu-link {
  align-items: center;
  background: rgba(255,255,255,.72);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  color: var(--text);
  display: grid;
  font-size: 12px;
  font-weight: 700;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr) auto;
  min-height: 48px;
  padding-inline: 14px;
  text-decoration: none;
}
.setting-menu-link span:last-child { color: var(--accent); font-size: 21px; font-weight: 500; line-height: 1; }
.setting-menu-link:active { background: #fff; transform: scale(.985); }
.playback-notice {
  background: rgba(23,42,55,.94);
  border-radius: 8px;
  color: #fff;
  font-size: 11px;
  font-weight: 650;
  inset-block-end: max(14px, env(safe-area-inset-bottom));
  inset-inline-start: 50%;
  line-height: 1.4;
  max-width: calc(100% - 32px);
  padding-block: 9px;
  padding-inline: 14px;
  position: fixed;
  text-align: center;
  transform: translateX(-50%);
  width: max-content;
  z-index: 340;
}
.playback-notice[hidden] { display: none; }

@media (min-width: 481px) {
  .app-frame { border-inline: 1px solid rgba(27,38,49,.08); }
}
@media (max-width: 359px) {
  .note-grid { gap: 4px; }
  .note-pad span { font-size: 13px; }
  .app-scroll { padding-inline: 6px; }
}
@media (max-height: 720px) {
  .app-header { height: 52px; }
  .app-scroll { padding-block-start: 5px; }
  .finder-card { margin-block-end: 6px; }
  .finder-card--input { padding-block: 7px; padding-inline: 8px; }
  .section-toolbar--input { margin-block-end: 4px; }
  .instrument-stage { height: 178px; }
  .instrument-stage[data-view="notes"] { height: 178px; }
  .instrument-stage[data-view="notes"] .note-grid { height: 128px; }
  .fretboard-svg { min-width: 1800px; width: 1800px; }
  .piano-svg { min-width: 890px; width: 890px; }
  .note-pad { height: 46px; }
  .fret-scroll { padding-block: 8px 1px; }
  .piano-scroll { padding-block: 8px 4px; }
  .is-chord-grid .top-match .card-main { block-size: 80px; min-height: 80px; }
  .is-chord-grid .result-card:not(.top-match) .card-main { block-size: 80px; min-height: 80px; padding-block: 6px 5px; }
  .promo-banner { margin-block-start: 6px; }
  .feature-promo-unit { min-height: 94px; padding-block: 16px; padding-inline: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}