:root {
  --bg: #0a0a0c;
  --panel: #131317;
  --panel-2: #1a1a20;
  --line: #2a2a32;
  --ink: #eeeef0;
  --muted: #8d8d96;
  --faint: #55555e;
  /* The books' chord color code */
  --maj: #ff5c93;
  --min: #4fc8f5;
  --dom: #f3bd4e;
  --dim: #ab7bff;
  --aug: #74dd6c;
  --sus: #c9c9cf;
  --note: #ffffff;
  /* Annotation green, like the hand-drawn arrows in the PDFs */
  --hand: #8be05a;
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px; --s7: 48px; --s8: 72px;
  --r: 14px;
  --display: 'Young Serif', Georgia, serif;
  --body: 'Manrope', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--maj); color: #000; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.15; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(34px, 5vw, 56px); }
h2 { font-size: clamp(24px, 3vw, 32px); }
h3 { font-size: 19px; }
p { margin: 0; }
button, select, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--hand); outline-offset: 3px; border-radius: 6px; }

/* ---------- Shell ---------- */
.shell {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: var(--s5);
  padding: var(--s5);
  min-height: 100vh;
}
.side {
  position: sticky;
  top: var(--s5);
  align-self: start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: var(--s5) var(--s4);
  display: flex;
  flex-direction: column;
  gap: var(--s5);
  max-height: calc(100vh - 2 * var(--s5));
  overflow: auto;
}
.brand { display: flex; gap: var(--s3); align-items: center; text-decoration: none; padding: 0 var(--s2); }
.brand svg { flex: none; }
.brand b { font-family: var(--display); font-weight: 400; font-size: 20px; display: block; line-height: 1.1; }
.brand small { color: var(--muted); font-size: 12px; }
.nav { display: flex; flex-direction: column; gap: var(--s4); }
.nav-group > span {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
  padding: 0 var(--s2) var(--s1);
}
.nav a {
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: var(--s2) var(--s2);
  border-radius: 10px;
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.nav a i { width: 9px; height: 9px; border-radius: 50%; border: 2px solid currentColor; flex: none; }
.nav a:hover { background: var(--panel-2); color: var(--ink); }
.nav a[aria-current='page'] { background: var(--panel-2); color: var(--ink); }
.nav a[aria-current='page'] i { background: currentColor; }
.side-foot { margin-top: auto; font-size: 12px; color: var(--faint); padding: 0 var(--s2); }
.side-foot a { color: var(--muted); }

main { min-width: 0; padding-bottom: var(--s8); }
.view { display: flex; flex-direction: column; gap: var(--s5); animation: rise 0.35s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }

.head { display: flex; flex-direction: column; gap: var(--s3); padding: var(--s4) 0 var(--s2); max-width: 760px; }
.kicker { font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--hand); font-weight: 700; }
.lede { color: var(--muted); font-size: 16px; max-width: 64ch; }
.lede em { color: var(--ink); font-style: normal; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: var(--s5);
  min-width: 0;
}
.card.tight { padding: var(--s4); }
.card h3 { margin-bottom: var(--s2); }
.card .sub { color: var(--muted); font-size: 14px; }
.grid2 { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: var(--s5); align-items: start; }
.stack { display: flex; flex-direction: column; gap: var(--s4); }
.row { display: flex; flex-wrap: wrap; gap: var(--s2); align-items: center; }
.between { justify-content: space-between; }

/* ---------- Controls ---------- */
.btn, .chip {
  border: 1px solid var(--line);
  background: var(--panel-2);
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:hover, .chip:hover { border-color: var(--muted); }
.btn:active, .chip:active { transform: scale(0.97); }
.btn.primary { background: var(--ink); color: #000; border-color: var(--ink); }
.btn.primary:hover { background: #fff; }
.chip[aria-pressed='true'] { background: var(--ink); color: #000; border-color: var(--ink); }
.chip.c-maj[aria-pressed='true'] { background: var(--maj); border-color: var(--maj); }
.chip.c-min[aria-pressed='true'] { background: var(--min); border-color: var(--min); }
.chip.c-dom[aria-pressed='true'] { background: var(--dom); border-color: var(--dom); }
.chip.c-dim[aria-pressed='true'] { background: var(--dim); border-color: var(--dim); }
.chip.c-aug[aria-pressed='true'] { background: var(--aug); border-color: var(--aug); }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--bg); border: 1px solid var(--line); border-radius: 999px; }
.seg .chip { border-color: transparent; background: transparent; }
.seg .chip[aria-pressed='true'] { background: var(--ink); color: #000; }
select {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 7px 30px 7px 12px;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 15px) 52%, calc(100% - 10px) 52%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  cursor: pointer;
}
label.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); font-weight: 600; }

/* ---------- Diagrams ---------- */
.diagram { width: 100%; height: auto; display: block; user-select: none; -webkit-user-select: none; }
.diagram text { font-family: var(--body); }
.node { cursor: pointer; }
.node circle, .node rect { transition: fill 0.15s, stroke-width 0.15s, opacity 0.2s; }
.node:hover circle, .node:hover rect { fill: rgba(255, 255, 255, 0.08); }
.node:focus-visible { outline: none; }
.node:focus-visible circle, .node:focus-visible rect { stroke-width: 3.5; }
.node.dim-out { opacity: 0.18; }
.node.lit circle { fill: rgba(255, 255, 255, 0.14); }
.edge { fill: none; stroke: rgba(255, 255, 255, 0.55); stroke-width: 1.2; }
.edge.dotted { stroke-dasharray: 3 4; }
.edge.hand { stroke: var(--hand); stroke-width: 2.2; }
.pulse { animation: pulse 0.6s ease; transform-box: fill-box; transform-origin: center; }
@keyframes pulse { 40% { transform: scale(1.12); } }

.chordpill {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  border: 1.5px solid currentColor;
  border-radius: 999px;
  padding: 4px 12px;
  background: transparent;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  transition: background 0.15s, transform 0.1s;
}
.chordpill small { color: var(--muted); font-weight: 500; font-size: 11px; }
.chordpill:hover { background: rgba(255, 255, 255, 0.07); }
.chordpill:active { transform: scale(0.96); }
.f-maj { color: var(--maj); } .f-min { color: var(--min); } .f-dom { color: var(--dom); }
.f-dim { color: var(--dim); } .f-aug { color: var(--aug); } .f-sus { color: var(--sus); } .f-other { color: var(--muted); } .f-hand { color: var(--hand); }
.arrow { color: var(--faint); font-weight: 700; }

.legend { display: flex; flex-wrap: wrap; gap: var(--s4); font-size: 12px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 11px; height: 11px; border-radius: 50%; border: 2px solid currentColor; }

/* Note squares, the scale notation from the Modes book */
.squares { display: flex; align-items: center; flex-wrap: wrap; gap: 2px; }
.sq {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
}
.sq.up { background: #e9e9ee; color: #000; box-shadow: 0 -3px 0 #fff inset, 0 4px 0 #77777f; }
.sq.down { background: #26262c; border-color: #56565e; box-shadow: 0 3px 0 #000 inset; }
.sq:hover { border-color: var(--hand); }
.step { font-size: 11px; color: var(--muted); min-width: 22px; text-align: center; font-family: var(--mono); }
.step.half { color: var(--maj); }

/* Proximity ladder */
.ladder { display: flex; flex-direction: column; gap: var(--s3); }
.tier { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: var(--s3); align-items: start; padding: var(--s3) 0; border-top: 1px solid var(--line); }
.tier:first-child { border-top: 0; }
.tier-label b { display: block; font-family: var(--display); font-weight: 400; font-size: 17px; }
.tier-label small { color: var(--muted); font-size: 12px; }
.meter { height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--hand), var(--dom), var(--maj)); opacity: 0.8; }

.notes-mini { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.callout { border-left: 2px solid var(--hand); padding: var(--s1) 0 var(--s1) var(--s4); color: var(--muted); font-size: 14px; }
.callout b { color: var(--ink); }
.flag { font-size: 13px; padding: var(--s2) var(--s3); border-radius: 10px; background: var(--panel-2); border: 1px solid var(--line); }
.flag.warn { border-color: rgba(243, 189, 78, 0.5); }
.flag.bad { border-color: rgba(255, 92, 147, 0.55); }
.flag.ok { border-color: rgba(139, 224, 90, 0.5); }

/* Home */
.hero { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: var(--s6); align-items: center; padding: var(--s6) 0 var(--s4); }
.hero .lede { font-size: 17px; }
.books { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: var(--s4); }
.book {
  display: flex; flex-direction: column; gap: var(--s3);
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: var(--s5);
  transition: border-color 0.2s, transform 0.2s;
}
.book:hover { border-color: var(--muted); transform: translateY(-2px); }
.book .vol { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); font-weight: 700; }
.book h3 { font-size: 21px; }
.book p { color: var(--muted); font-size: 14px; }
.book .go { margin-top: auto; font-weight: 700; font-size: 13px; }
.book svg { height: 54px; width: auto; align-self: flex-start; }

.empty { display: flex; flex-direction: column; align-items: center; text-align: center; gap: var(--s3); padding: var(--s6) var(--s4); color: var(--muted); }
.empty svg { width: 120px; height: auto; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: #000; padding: 10px 18px; border-radius: 999px; font-weight: 700; font-size: 13px;
  opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.menu-btn { display: none; }

.saw .chip { padding: 5px 10px; font-size: 12px; min-width: 44px; }

/* Voice lab */
.roll { width: 100%; height: auto; display: block; }
.v-s { color: var(--dom); } .v-a { color: var(--aug); } .v-t { color: var(--min); } .v-b { color: var(--maj); }

@media (max-width: 980px) {
  .grid2, .hero { grid-template-columns: 1fr; }
  .hero > svg { max-width: 340px; margin: 0 auto; }
}
@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; padding: var(--s4); gap: var(--s4); }
  .side { position: sticky; top: 0; z-index: 20; max-height: none; flex-direction: row; align-items: center; padding: var(--s3) var(--s4); border-radius: 0 0 16px 16px; margin: calc(-1 * var(--s4)) calc(-1 * var(--s4)) 0; border-top: 0; }
  .menu-btn { display: inline-flex; margin-left: auto; }
  .nav, .side-foot { display: none; }
  .side.open { flex-wrap: wrap; }
  .side.open .nav { display: flex; flex-basis: 100%; padding-top: var(--s3); }
  .tier { grid-template-columns: 1fr; gap: var(--s2); }
  .card { padding: var(--s4); }
  .sq { width: 34px; height: 34px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---------- Keys and tab dock ---------- */
.dock {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: min(560px, calc(100vw - 40px));
  background: rgba(19, 19, 23, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
  z-index: 40;
  padding: var(--s3) var(--s4) var(--s4);
}
.dock[data-open='false'] { width: auto; padding-bottom: var(--s3); }
.dock[data-open='false'] .dock-body, .dock[data-open='false'] .dock-views, .dock[data-open='false'] .notes-mini, .dock[data-open='false'] .dock-head b, .dock[data-open='false'] .dock-add { display: none; }
.dock-head { display: flex; align-items: center; gap: var(--s3); min-width: 0; }
.dock-head b { font-family: var(--display); font-weight: 400; font-size: 20px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dock-head .notes-mini { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; flex: 1; }
.dock-toggle { border: 1px solid var(--line); background: var(--panel-2); border-radius: 999px; padding: 5px 12px; font-size: 12px; font-weight: 700; cursor: pointer; flex: none; }
.dock-toggle:hover { border-color: var(--muted); }
.dock-views { display: inline-flex; gap: 4px; margin-left: auto; flex: none; }
.dock-views .chip { padding: 4px 10px; font-size: 11px; }
.dock-body { display: flex; gap: var(--s4); align-items: center; justify-content: space-between; margin-top: var(--s3); }
.dock-empty { padding: var(--s2) 0; }
.pianowrap { flex: 1; min-width: 0; max-width: 360px; }
.dock[data-view='piano'] .pianowrap { max-width: 520px; margin: 0 auto; }
.piano, .fretmap { width: 100%; height: auto; display: block; }
.piano .key { cursor: pointer; }
.piano .key:hover rect { opacity: 0.85; }
.guitar { display: flex; align-items: center; gap: var(--s2); flex: none; }
.guitar.wide { flex: 1; flex-direction: column; align-items: stretch; min-width: 0; }
.chordbox { width: 132px; height: auto; }
.alts { display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; }
.alts .btn { padding: 2px 12px; font-size: 16px; }
.alts .btn:disabled { opacity: 0.3; cursor: default; }
.dock[data-view='piano'] .guitar { display: none; }
.dock[data-view='guitar'] .pianowrap { display: none; }
.dock[data-view='guitar'] .guitar.wide, .dock[data-view='guitar'] .guitar { flex: 1; justify-content: center; }
main { padding-bottom: 260px; }
@media (max-width: 820px) {
  .dock { right: 8px; left: 8px; bottom: 8px; width: auto; padding: var(--s2) var(--s3) var(--s3); }
  .dock-head b { font-size: 17px; }
  .dock-head .notes-mini { display: none; }
  .chordbox { width: 92px; }
  .dock-body { gap: var(--s2); }
}

/* ---------- Sketchpad ---------- */
.text-in { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; color: var(--ink); font-weight: 600; }
input[type='range'] { accent-color: var(--hand); width: 160px; }
.count { margin-left: auto; background: var(--hand); color: #000; font-size: 11px; font-weight: 800; border-radius: 999px; padding: 1px 8px; }
.lane { display: flex; flex-wrap: wrap; gap: var(--s2); }
.sk-card {
  display: flex; flex-direction: column; gap: 4px; align-items: flex-start;
  border: 1.5px solid currentColor; border-radius: 12px; padding: var(--s2) var(--s3);
  min-width: 112px; background: var(--bg); transition: background 0.15s, box-shadow 0.15s;
}
.sk-card.sel { background: rgba(255, 255, 255, 0.06); box-shadow: 0 0 0 2px var(--panel), 0 0 0 4px currentColor; }
.sk-card.now { background: rgba(139, 224, 90, 0.14); }
.sk-name { background: none; border: 0; padding: 0; cursor: pointer; font-family: var(--display); font-size: 22px; color: inherit; }
.sk-card select { padding: 3px 26px 3px 8px; font-size: 12px; color: var(--ink); }
.sk-tools { display: flex; gap: 2px; }
.sk-tools button { background: var(--panel-2); border: 1px solid var(--line); color: var(--muted); border-radius: 6px; width: 26px; height: 24px; cursor: pointer; font-size: 13px; padding: 0; }
.sk-tools button:hover:not(:disabled) { color: var(--ink); border-color: var(--muted); }
.sk-tools button:disabled { opacity: 0.3; cursor: default; }
.dock-add { padding: 3px 10px; font-size: 11px; border-color: var(--hand); color: var(--hand); flex: none; }
.dock-add:hover { background: var(--hand); color: #000; }
.card .btn { justify-content: center; }
.btn.danger { border-color: var(--maj); color: var(--maj); }