:root {
  color-scheme: light;
  --ink: #20201d;
  --muted: #696861;
  --paper: #f4f0e6;
  --surface: #fffdf8;
  --line: #d8d1c2;
  --dark-ring: #33342f;
  --accent: #d88b3d;
  --accent-soft: #f3d2a9;
  --shadow: 0 18px 45px rgba(47, 42, 32, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--paper);
}

body {
  min-height: 100dvh;
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  font-family: "DM Sans", system-ui, sans-serif;
}

.site-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 64px;
  font-size: clamp(0.86rem, 1.15vw, 0.95rem);
  line-height: 1.25;
}

.site-menu {
  margin-left: auto;
}

.site-menu-toggle {
  display: none;
}

.site-menu > .site-nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav .site-brand {
  flex: 0 0 auto;
  padding-left: 0;
  color: var(--ink);
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(2rem, 3vw, 2.35rem);
  font-weight: 400;
  line-height: 0.95;
  text-wrap: balance;
}

.nav-menu {
  position: relative;
}

.nav-menu summary {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.nav-menu summary:hover,
.nav-menu[open] summary {
  color: var(--ink);
  background: var(--surface);
}

.nav-menu summary[aria-current="true"] {
  color: var(--surface);
  background: var(--dark-ring);
  font-weight: 700;
}

.nav-menu summary:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 2px;
}

.nav-submenu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 10;
  display: grid;
  min-width: 190px;
  gap: 4px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.nav-submenu a {
  display: block;
  width: 100%;
}

@media (max-width: 760px) {
  .site-nav {
    flex-direction: row;
    gap: 16px;
    margin-bottom: 40px;
  }

  .site-menu-toggle {
    display: block;
    padding: 10px 14px;
    border: 1px solid var(--line);
    border-radius: 9px;
    color: var(--ink);
    background: var(--surface);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
  }

  .site-menu.is-open > .site-menu-toggle {
    color: var(--surface);
    background: var(--dark-ring);
  }

  .site-menu-toggle:focus-visible {
    outline: 3px solid var(--accent-soft);
    outline-offset: 2px;
  }

  .site-menu:not(.is-open) > .site-nav-links {
    display: none;
  }

  .site-menu > .site-nav-links {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .site-menu > .site-nav-links > a,
  .site-menu > .site-nav-links > .nav-menu {
    min-width: 0;
  }

  .site-menu .nav-submenu {
    right: 0;
    left: auto;
  }
}

.site-nav a:hover {
  color: var(--ink);
  background: var(--surface);
}

.site-nav a[aria-current="page"] {
  color: var(--surface);
  background: var(--dark-ring);
  font-weight: 700;
}

.site-nav a:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 2px;
}

button,
svg {
  -webkit-tap-highlight-color: transparent;
}

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0;
}

.hero {
  max-width: 690px;
  margin-bottom: 30px;
}

.hero h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  line-height: 0.92;
}

.hero .intro {
  margin-top: 18px;
}

.eyebrow,
.card-label {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(3rem, 6vw, 5.25rem);
  font-weight: 400;
  line-height: 0.88;
  text-wrap: balance;
}

.intro {
  max-width: 590px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
  text-wrap: pretty;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 64px;
  align-items: center;
}

.chart-column {
  min-width: 0;
}

.chart-stage {
  position: relative;
  width: min(100%, 660px);
  margin: 0 auto;
  aspect-ratio: 1;
}

.circle-chart {
  display: block;
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 14px 18px rgba(44, 39, 30, 0.1));
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.circle-chart:active,
.circle-chart.is-dragging {
  cursor: grabbing;
}

.position-marker {
  position: absolute;
  z-index: 10;
  top: -12px;
  left: 50%;
  width: 28px;
  height: 38px;
  transform: translateX(-50%);
  pointer-events: none;
}

.position-marker span {
  display: block;
  width: 0;
  height: 0;
  margin: 0 auto;
  border-right: 14px solid transparent;
  border-left: 14px solid transparent;
  border-top: 24px solid var(--accent);
}

#rotating-wheel {
  transform-origin: 320px 320px;
}

.segment {
  cursor: pointer;
  outline: none;
}

.segment .major-wedge {
  fill: var(--surface);
  stroke: var(--line);
  stroke-width: 2;
}

.segment:nth-child(even) .major-wedge {
  fill: #eee9de;
}

.segment .minor-wedge {
  fill: var(--dark-ring);
  stroke: #55564f;
  stroke-width: 2;
}

.segment .key-label,
.segment .minor-label,
.segment .accidental-label {
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}

.segment .key-label {
  fill: var(--ink);
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 34px;
}

.segment .minor-label {
  fill: #fffdf8;
  font-size: 17px;
  font-weight: 600;
}

.segment .accidental-label {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.segment:hover .major-wedge,
.segment:focus-visible .major-wedge,
.segment.is-selected .major-wedge {
  fill: var(--accent-soft);
}

.segment:hover .minor-wedge,
.segment:focus-visible .minor-wedge,
.segment.is-selected .minor-wedge {
  fill: var(--accent);
}

.segment:focus-visible .major-wedge {
  stroke: var(--ink);
  stroke-width: 5;
}

.hub {
  fill: var(--paper);
  stroke: var(--line);
  stroke-width: 2;
  pointer-events: none;
}

.chart-title {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 27%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.chart-title p {
  display: flex;
  flex-direction: column;
  margin: 0;
  color: var(--ink);
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(1rem, 3.3vw, 1.7rem);
  font-weight: 400;
  line-height: 0.9;
  text-align: center;
  text-wrap: balance;
}

.chart-title p span:nth-child(2) {
  margin: 5px 0 4px;
  color: var(--accent);
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 0.42em;
  font-weight: 700;
  text-transform: uppercase;
}

.chart-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 24px;
}

.chart-controls p {
  display: flex;
  flex-direction: column;
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
  text-align: center;
  text-wrap: pretty;
}

.chart-controls strong {
  color: var(--ink);
  font-size: 0.9rem;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  background: var(--surface);
  font: inherit;
  font-size: 1.2rem;
  cursor: pointer;
  transition: transform 160ms ease-out, border-color 160ms ease-out;
}

.icon-button:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.icon-button:active {
  transform: translateY(0);
}

.icon-button:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

.key-card {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.key-heading {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

#key-name {
  min-width: 82px;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 5rem;
  line-height: 0.8;
}

.key-heading div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.key-heading strong {
  font-size: 1.05rem;
}

.key-heading small {
  color: var(--muted);
  font-size: 0.9rem;
}

.practice-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--surface);
  background: var(--dark-ring);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
}

.practice-link:hover {
  color: var(--accent-soft);
}

.practice-link:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

.key-facts {
  display: grid;
  gap: 18px;
  margin: 28px 0;
}

.key-facts div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.key-facts dt,
.key-facts dd {
  margin: 0;
  font-size: 0.88rem;
}

.key-facts dt {
  color: var(--muted);
}

.key-facts dd {
  font-weight: 600;
  text-align: right;
}

.degrees {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.degrees-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.degrees-heading h2 {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  text-wrap: balance;
}

.degrees-heading span {
  color: var(--muted);
  font-size: 0.72rem;
}

#degree-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.degree {
  min-width: 0;
  padding: 9px 6px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-align: center;
}

.degree b,
.degree span {
  display: block;
}

.degree b {
  margin-bottom: 3px;
  color: var(--accent);
  font-size: 0.65rem;
  font-variant-numeric: tabular-nums;
}

.degree span {
  overflow: hidden;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.degree.is-long span {
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 0.64rem;
  font-weight: 600;
}

.pentatonic {
  display: grid;
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.pentatonic h2 {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  text-wrap: balance;
}

#pentatonic-list {
  display: grid;
  gap: 14px;
}

.pentatonic-row {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.pentatonic-row p {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
}

.pentatonic-name {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  min-width: 0;
}

.pentatonic-row strong {
  overflow: hidden;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scale-quality,
.scale-spelling {
  flex: 0 0 auto;
  padding: 2px 4px;
  border-radius: 4px;
  font-size: 0.46rem;
  font-weight: 700;
  line-height: 1.2;
  text-transform: uppercase;
}

.scale-quality {
  color: var(--surface);
  background: var(--dark-ring);
}

.scale-spelling {
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface);
}

.pentatonic-row.is-minor .scale-quality {
  color: var(--ink);
  background: var(--accent-soft);
}

.pentatonic-row small {
  color: var(--muted);
  font-size: 0.58rem;
  font-variant-numeric: tabular-nums;
}

.pentatonic-row ol {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.pentatonic-row li {
  overflow: hidden;
  padding: 7px 2px;
  border-radius: 7px;
  color: var(--surface);
  background: var(--dark-ring);
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 0.88rem;
  line-height: 1;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pentatonic-row.is-minor li {
  color: var(--ink);
  background: var(--accent-soft);
}

.pentatonic-row li.is-long {
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 0.5rem;
  font-weight: 600;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.76rem;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.major-dot {
  border: 1px solid var(--line);
  background: var(--surface);
}

.minor-dot {
  background: var(--dark-ring);
}

.banjo-section {
  margin-top: 72px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.banjo-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 30px;
}

.banjo-heading .card-label {
  margin-bottom: 8px;
}

.banjo-heading h2 {
  max-width: 720px;
  margin: 0;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1;
  text-wrap: balance;
}

.banjo-heading h2 span {
  color: var(--accent);
}

.banjo-heading > p {
  flex: 0 0 auto;
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 0.78rem;
}

.chord-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  margin-bottom: 26px;
  padding: 0 0 12px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.chord-tab {
  flex: 1 0 94px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  background: var(--surface);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.chord-tab b,
.chord-tab span {
  display: block;
}

.chord-tab b {
  margin-bottom: 2px;
  color: inherit;
  font-size: 0.62rem;
  font-variant-numeric: tabular-nums;
}

.chord-tab span {
  overflow: hidden;
  font-size: 0.78rem;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chord-tab[aria-selected="true"] {
  border-color: var(--dark-ring);
  color: var(--surface);
  background: var(--dark-ring);
}

.chord-tab:focus-visible,
.chord-panel:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

.chord-panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.chord-panel-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.chord-panel-heading h3 {
  margin: 0;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.8rem;
  font-weight: 400;
  text-align: right;
  text-wrap: balance;
}

.chord-panel-heading h3 span {
  color: var(--accent);
}

.banjo-shapes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.banjo-shape {
  display: grid;
  grid-template-columns: minmax(118px, 0.8fr) minmax(0, 1.2fr);
  gap: 18px;
  align-items: center;
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.shape-copy {
  min-width: 0;
}

.shape-copy h4 {
  margin: 0 0 3px;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.75rem;
  font-weight: 400;
  text-wrap: balance;
}

.shape-copy > p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.7rem;
  text-wrap: pretty;
}

.shape-frets {
  margin: 0;
}

.shape-frets dt {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.6rem;
  text-transform: uppercase;
}

.shape-frets dd {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.fret-diagram {
  display: block;
  width: 100%;
  max-width: 150px;
  height: auto;
  margin: 0 auto;
}

.fret-diagram .fret,
.fret-diagram .string {
  stroke: var(--line);
  stroke-width: 2;
}

.fret-diagram .nut {
  stroke: var(--ink);
  stroke-width: 5;
}

.fret-diagram .marker {
  fill: var(--accent);
  stroke: var(--surface);
  stroke-width: 2;
}

.fret-diagram .open-marker {
  fill: var(--surface);
  stroke: var(--accent);
  stroke-width: 3;
}

.fret-diagram text {
  fill: var(--muted);
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  text-anchor: middle;
}

.fret-diagram .position-label {
  fill: var(--ink);
  font-size: 9px;
  font-weight: 700;
  text-anchor: end;
}

.fret-diagram .marker-label {
  fill: var(--surface);
  font-size: 9px;
  font-weight: 700;
  pointer-events: none;
  text-anchor: middle;
}

.fret-diagram .marker-label.open-label {
  fill: var(--accent);
  font-size: 8px;
}

.banjo-note {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.6;
  text-wrap: pretty;
}

.banjo-note strong {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .key-card {
    width: min(100%, 560px);
    margin: 0 auto;
  }

  .banjo-shapes {
    grid-template-columns: 1fr;
  }

  .banjo-shape {
    grid-template-columns: 1fr 150px;
  }
}

@media (max-width: 560px) {
  .site-nav {
    align-items: center;
    margin-bottom: 36px;
  }

  .site-nav a,
  .nav-menu summary,
  .site-menu-toggle {
    padding: 9px 10px;
  }

  .page-shell {
    width: min(100% - 24px, 1180px);
    padding: 40px 0;
  }

  .hero {
    margin-bottom: 30px;
  }

  .intro {
    font-size: 0.96rem;
  }

  .position-marker {
    top: -6px;
  }

  .key-card {
    padding: 24px;
    border-radius: 18px;
  }

  #key-name {
    min-width: 64px;
    font-size: 4rem;
  }

  .banjo-section {
    margin-top: 48px;
    padding: 24px;
    border-radius: 18px;
  }

  .banjo-heading {
    display: block;
  }

  .banjo-heading > p {
    margin-top: 12px;
  }

  .chord-panel-heading {
    display: block;
  }

  .chord-panel-heading h3 {
    margin-top: 5px;
    text-align: left;
  }

  .banjo-shape {
    grid-template-columns: minmax(0, 1fr) 118px;
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}