:root {
  --bg: #faf7f2;
  --card: #ffffff;
  --ink: #2b2622;
  --muted: #8a7f74;
  --line: #e4dccf;
  --accent: #b4623a;
  --dot: #4a3f35;
  --barre: #b4623a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}

header {
  padding: 2rem 2rem 1.25rem;
  max-width: 1240px;
  margin: 0 auto;
}

header h1 {
  margin: 0 0 0.3rem;
  font-size: 1.5rem;
  letter-spacing: 0.01em;
}

header p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  max-width: 60ch;
}

main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 2rem 3rem;
}

/* ---- tuning selector ---- */

.controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}

.controls label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.controls select {
  font: inherit;
  font-size: 0.85rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

#tuning-select { min-width: 280px; }
#chord-type-select { min-width: 150px; }

.controls select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ---- one tuning shown at a time ---- */

.row {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 1.25rem;
  align-items: start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
}

.row .cell h3 {
  margin: 0 0 0.45rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.tuning h2 {
  margin: 0 0 0.15rem;
  font-size: 1rem;
}

.tuning .notes {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.tuning .abbr {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.05rem 0.5rem;
}

.tuning .desc {
  margin: 0.45rem 0 0;
  font-size: 0.72rem;
  color: var(--muted);
}

/* ---- chord cards ---- */

.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0.25rem 0.3rem 0.3rem;
  width: 56px;
  text-align: center;
}

.cname {
  font-size: 0.68rem;
  font-weight: 700;
  margin-bottom: 0.1rem;
}

.cname.minor { color: var(--accent); }

.none {
  color: var(--muted);
  font-size: 0.6rem;
  padding: 0.6rem 0;
}

/* ---- styles & progressions ---- */

.cell.styles {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 0.75rem;
}

.style {
  margin-bottom: 0.6rem;
}

.style:last-child { margin-bottom: 0; }

.style-head {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.style-head strong {
  font-size: 0.78rem;
}

.style-numerals {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.style-note {
  font-size: 0.68rem;
  color: var(--muted);
}

.type-hint {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
}

/* ---- SVG fretboard diagrams ---- */

svg.diag { display: block; margin: 0 auto; }

.diag .nut {
  stroke: var(--dot);
  stroke-width: 3;
}

.diag .fret,
.diag .string {
  stroke: #c9bfb1;
  stroke-width: 1;
}

.diag .open,
.diag .mute {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.2;
  font-size: 6px;
}

.diag .strname {
  fill: var(--muted);
  font-size: 5px;
  text-anchor: middle;
}

.diag .fretlabel {
  fill: var(--muted);
  font-size: 5.5px;
  font-weight: 600;
  text-anchor: end;
}

.diag .open,
.diag .mute {
  font-size: 6px;
}

.diag .barre {
  fill: var(--barre);
  opacity: 0.85;
}

.diag .dot {
  fill: var(--dot);
}

footer {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 2rem 2.5rem;
  color: var(--muted);
  font-size: 0.7rem;
}

footer .legend span { margin-right: 1.25rem; }

/* ---- tabs ---- */

.tabs {
  display: flex;
  gap: 0.35rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.1rem;
}

.tab {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.55rem 1.1rem;
  margin-bottom: -1px;
  cursor: pointer;
}

.tab:hover { color: var(--ink); }

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

/* ---- legends ---- */

p.legend {
  margin: 0.75rem 0 0;
  font-size: 0.7rem;
  color: var(--muted);
}

p.legend .legend-root { color: var(--accent); font-weight: 600; }
p.legend .legend-tone { color: #b08a5e; font-weight: 600; }

/* ---- piano ---- */

.piano-section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
}

.piano-section h3,
#tab-piano .cell.styles h3 {
  margin: 0 0 0.45rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

#tab-piano .cell.styles {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
}

.card.piano-card { width: auto; }

svg.kbd { display: block; }

.kbd .wkey { fill: #ffffff; stroke: #c9bfb1; stroke-width: 0.8; }
.kbd .bkey { fill: #3a332c; stroke: #3a332c; stroke-width: 0.8; }
.kbd .proot { fill: var(--accent); stroke: var(--accent); stroke-width: 0.8; }
.kbd .ptone { fill: #e6c9a8; stroke: #c9bfb1; stroke-width: 0.8; }

/* ---- guitar ---- */

/* six-string diagrams are wider than the uke's four, so the cards grow */
#tab-guitar .card { width: 68px; }

@media (max-width: 900px) {
  .row { grid-template-columns: 1fr; }
  .controls select { min-width: 0; width: 100%; }
}