:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #efeee9;
  --ink: #1d1d22;
  --ink-2: #55555e;
  --ink-3: #8a8a93;
  --line: #dddcd6;
  --accent: #6d5ce8;
  --accent-ink: #ffffff;
  --accent-soft: #e9e5fd;
  --bass: #3f2fb8;
  --played: #f0b44c;
  --good: #1f8a4c;
  --good-soft: #e1f3e8;
  --bad: #c43d3d;
  --bad-soft: #f9e3e3;
  --warn: #b26b00;
  --warn-soft: #fbf0d9;
  --key-white: #ffffff;
  --key-black: #2a2a30;
  --radius: 12px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171c;
    --surface: #212128;
    --surface-2: #2b2b33;
    --ink: #ececf1;
    --ink-2: #b4b4bf;
    --ink-3: #85858f;
    --line: #36363f;
    --accent: #8b7cf6;
    --accent-ink: #14141a;
    --accent-soft: #2f2a52;
    --bass: #b9afff;
    --played: #e0a640;
    --good: #4cc27f;
    --good-soft: #1d3527;
    --bad: #f06a6a;
    --bad-soft: #3d2222;
    --warn: #e9a53c;
    --warn-soft: #3a3020;
    --key-white: #e9e9ee;
    --key-black: #101014;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.app {
  max-width: 760px;
  margin: 0 auto;
  padding: env(safe-area-inset-top) 16px calc(32px + env(safe-area-inset-bottom));
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 8px;
}

h1 { font-size: 1.15rem; margin: 0; letter-spacing: .01em; }
h2 { margin: 0 0 6px; }
h3 { margin: 0 0 12px; font-size: 1rem; }
h3 small { color: var(--ink-3); font-weight: 400; margin-left: 6px; }

nav {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 4px;
  margin-bottom: 14px;
  background: var(--surface-2);
  border-radius: var(--radius);
}

nav button {
  border: 0;
  background: transparent;
  padding: 10px 0;
  font-weight: 600;
  color: var(--ink-2);
}

nav button.on { background: var(--surface); color: var(--ink); box-shadow: 0 1px 2px rgb(0 0 0 / .12); }

button, .button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 14px;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  touch-action: manipulation;
}

button:disabled { opacity: .55; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.big { font-size: 1.2rem; padding: 14px 44px; }
button.ghost { background: transparent; }
button.ghost.on { border-color: var(--accent); color: var(--accent); }
button.good.on, button.good:not(:disabled):hover { background: var(--good-soft); border-color: var(--good); }
button.bad.on, button.bad:not(:disabled):hover { background: var(--bad-soft); border-color: var(--bad); }
button.link { border: 0; background: none; min-height: 0; padding: 0 6px; color: var(--accent); font-size: .85rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}

.hint { color: var(--ink-3); font-size: .85rem; }

.banner {
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 12px;
  background: var(--surface-2);
}
.banner.good { background: var(--good-soft); color: var(--good); font-weight: 600; }
.banner.bad { background: var(--bad-soft); color: var(--bad); font-weight: 600; }
.banner.warn { background: var(--warn-soft); }
.banner b { color: var(--ink); }
.banner .meta { float: right; font-weight: 400; color: var(--ink-3); }

.badge {
  font-size: .78rem;
  color: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 99px;
  padding: 2px 10px;
}
.badge.live { color: var(--good); border-color: var(--good); }

.group { margin-bottom: 12px; }
.group-label { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); margin-bottom: 6px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.actions .primary { margin-left: auto; }
.actions.center { justify-content: center; align-items: center; }

.seg { display: flex; flex-wrap: wrap; gap: 4px; padding: 3px; background: var(--surface-2); border-radius: 10px; }
.seg button { flex: 1 1 auto; border: 0; background: transparent; min-height: 38px; color: var(--ink-2); }
.seg button.on { background: var(--surface); color: var(--ink); font-weight: 600; box-shadow: 0 1px 2px rgb(0 0 0 / .12); }

.field { margin-bottom: 12px; }
.field > span { display: block; font-size: .85rem; color: var(--ink-2); margin-bottom: 4px; }

.chips, .presets { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.presets { margin: 0 0 14px; }
button.chip { min-height: 36px; padding: 5px 12px; border-radius: 99px; color: var(--ink-2); }
button.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.toggle { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; cursor: pointer; }
.toggle input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--accent); flex: none; }
.toggle small { display: block; color: var(--ink-3); font-size: .8rem; }

.slider { display: block; padding: 6px 0; }
.slider span { display: flex; justify-content: space-between; font-size: .92rem; }
.slider b { font-variant-numeric: tabular-nums; }
.slider input { width: 100%; accent-color: var(--accent); }


/* ---------------------------------------------------------------- write view */

select {
  font: inherit;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  min-height: 40px;
}

.key-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row2 { display: grid; grid-template-columns: 1fr 1.6fr; gap: 12px; }
.row2 .field { margin-bottom: 0; }
.setup .seg button { font-size: .88rem; padding: 6px 8px; }
@media (max-width: 600px) { .row2 { grid-template-columns: 1fr; } }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.sel-info { color: var(--ink-2); font-size: .92rem; }
.tools { display: flex; flex-wrap: wrap; gap: 4px; }
.tools button { min-width: 40px; min-height: 38px; padding: 4px 8px; font-size: 1.05rem; }

.score-wrap { overflow-x: auto; margin: 0 -16px; padding: 0 16px; -webkit-overflow-scrolling: touch; }
svg.score { display: block; user-select: none; -webkit-user-select: none; touch-action: manipulation; }
svg.score.interactive { cursor: crosshair; }
.score .staff line { stroke: var(--ink-3); stroke-width: 1; }
.score line.bar { stroke: var(--line); stroke-width: 1; }
.score line.ledger { stroke: var(--ink-3); stroke-width: 1.2; }
.score .clef { fill: var(--ink-2); font-family: "Noto Music", "Bravura Text", "Apple Symbols", "Segoe UI Symbol", "Symbola", serif; }
.score .acc { fill: var(--ink); font-size: 17px; font-family: "Apple Symbols", "Segoe UI Symbol", "Noto Music", system-ui, serif; }
.score .note .head { fill: var(--ink); }
.score .note.cf .head { fill: var(--ink-2); }
.score .note.warning .head, .score .note.warning .acc { fill: var(--warn); }
.score .note.error .head, .score .note.error .acc { fill: var(--bad); }
.score .note.sel .head { fill: var(--accent); }
.score .note.ghost { opacity: .35; pointer-events: none; }
.score .stem { stroke: var(--ink); stroke-width: 1.3; }
.score .note.warning .stem { stroke: var(--warn); }
.score .note.error .stem { stroke: var(--bad); }
.score .note.sel .stem, .score .note.ghost .stem { stroke: var(--accent); }
.score rect.rest { fill: var(--ink-2); }
.score .note.ghost .head { fill: var(--accent); }
.score rect.cursor { fill: var(--accent-soft); }
.score rect.hl { fill: var(--warn-soft); }
.score rect.playing { fill: var(--accent-soft); }
.score .labels text { font-size: 13px; fill: var(--ink-2); font-variant-numeric: tabular-nums; }
.score .labels .iv { font-weight: 700; }
.score .labels .iv.perfect { fill: var(--ink); }
.score .labels .iv.imperfect { fill: var(--good); }
.score .labels .iv.dissonant { fill: var(--bad); }
.score .labels .iv.passing { fill: var(--ink-3); font-weight: 400; }
.score .labels .mv { font-size: 11px; fill: var(--ink-3); font-style: italic; }
.score .labels .warning { fill: var(--warn); font-weight: 700; }
.score .labels .error { fill: var(--bad); font-weight: 700; }

.legend { font-size: .78rem; color: var(--ink-3); margin: 4px 0 10px; }
.play-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.play-bar .tempo { flex: 1 1 160px; min-width: 140px; }

details.typing { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 10px; }
details.typing summary { cursor: pointer; color: var(--ink-2); font-size: .92rem; }
.text-entry { display: block; margin-top: 10px; }
.text-entry span { display: block; font-size: .8rem; color: var(--ink-3); }
.text-entry input {
  width: 100%;
  font: 1rem/1.4 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
}
.err-text { color: var(--bad); }
kbd {
  font: .78rem ui-monospace, monospace;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 4px;
  background: var(--surface-2);
}
code { font: .9em ui-monospace, monospace; background: var(--surface-2); padding: 0 4px; border-radius: 4px; }

.summary { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.penalty { text-align: center; border-radius: 10px; padding: 6px 14px; min-width: 76px; }
.penalty b { display: block; font-size: 1.6rem; line-height: 1.1; font-variant-numeric: tabular-nums; }
.penalty small { color: var(--ink-3); font-size: .72rem; }
.penalty.good { background: var(--good-soft); color: var(--good); }
.penalty.warn { background: var(--warn-soft); color: var(--warn); }
.penalty.bad { background: var(--bad-soft); color: var(--bad); }
.clean { color: var(--good); font-weight: 600; }

ul.violations { list-style: none; margin: 0; padding: 0; }
ul.violations li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 8px 6px;
  border-top: 1px solid var(--line);
  cursor: pointer;
  border-radius: 6px;
}
ul.violations li.focus { background: var(--warn-soft); }
ul.violations .dot { width: 10px; height: 10px; border-radius: 50%; margin-top: 6px; flex: none; background: var(--ink-3); }
ul.violations li.error .dot { background: var(--bad); }
ul.violations li.warning .dot { background: var(--warn); }
ul.violations li.info { opacity: .7; }
.v-body { flex: 1; min-width: 0; }
.v-meta { font-size: .78rem; color: var(--ink-3); }
.voice {
  font-size: .68rem;
  font-weight: 700;
  border-radius: 4px;
  padding: 1px 5px;
  margin-right: 6px;
  background: var(--surface-2);
  color: var(--ink-2);
  vertical-align: 1px;
}

.stat-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 600px) { .stat-cols { grid-template-columns: 1fr; } }
.meter-row { display: grid; grid-template-columns: 76px 1fr 40px; gap: 8px; align-items: center; font-size: .85rem; padding: 2px 0; }
.meter-row b { text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; color: var(--ink-2); }
.meter { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; }
.meter span { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
h3 small { color: var(--ink-3); font-weight: 400; margin-left: 6px; }

ul.saved { list-style: none; padding: 0; margin: 0 0 10px; }
ul.saved li { display: flex; gap: 8px; align-items: baseline; padding: 6px 0; border-top: 1px solid var(--line); }
ul.saved .del { margin-left: auto; color: var(--ink-3); }
.library h3 + .chips { margin-bottom: 6px; }
.library h3:not(:first-child) { margin-top: 14px; }
.file-row { display: flex; gap: 6px; flex-wrap: wrap; }
input.name {
  flex: 1 1 140px;
  font: inherit;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  min-width: 0;
}

/* ---------------------------------------------------------------- rules + cheat sheet */

.tag {
  font-size: .66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  border-radius: 4px;
  padding: 1px 5px;
  vertical-align: 2px;
  background: var(--surface-2);
  color: var(--ink-3);
}
.tag.error { background: var(--bad-soft); color: var(--bad); }
.tag.warning { background: var(--warn-soft); color: var(--warn); }
.tag.preset { margin-left: 6px; font-weight: 500; text-transform: none; letter-spacing: 0; }
.toggle.rule { border-top: 1px solid var(--line); }

.cheat p, .cheat dd, .cheat li { color: var(--ink-2); }
.cheat dl { margin: 0; }
.cheat dt { font-weight: 600; margin-top: 10px; }
.cheat dd { margin: 2px 0 0; }
.cheat ol { padding-left: 22px; margin: 0; }
table.intervals { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.intervals th { text-align: left; font-weight: 500; color: var(--ink-3); font-size: .75rem; padding: 0 6px 6px; }
table.intervals td { padding: 5px 6px; border-top: 1px solid var(--line); }
.num { font-variant-numeric: tabular-nums; }
th.num, td.num { text-align: right; }
@media (max-width: 480px) { table.intervals th:nth-child(4), table.intervals td:nth-child(4) { display: none; } }
.cls { font-size: .8rem; font-weight: 600; border-radius: 4px; padding: 1px 6px; }
.cls.perfect { background: var(--surface-2); color: var(--ink); }
.cls.imperfect { background: var(--good-soft); color: var(--good); }
.cls.dissonant { background: var(--bad-soft); color: var(--bad); }

.examples { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin: 10px 0; }
figure.example { margin: 0; background: var(--surface-2); border-radius: 10px; padding: 6px 8px 10px; overflow-x: auto; }
figure.example svg.score { margin: 0 auto; }
figure.example figcaption { font-size: .85rem; color: var(--ink-2); }
ul.rule-list { list-style: none; padding: 0; margin: 0 0 12px; }
ul.rule-list li { padding: 7px 0; border-top: 1px solid var(--line); }
ul.rule-list li div { font-size: .88rem; color: var(--ink-3); }
.rule-group { margin-top: 12px; }

/* ---------------------------------------------------------------- hints */

.hints-now ul.tips { margin: 0 0 10px; padding-left: 18px; color: var(--ink-2); font-size: .92rem; }
.hints-now ul.tips li { margin: 4px 0; }
.cands .group-label { display: flex; justify-content: space-between; align-items: baseline; margin-top: 8px; }
.cands .group-label .link { text-transform: none; letter-spacing: 0; }
button.chip.cand { gap: 6px; }
button.chip.cand small { color: var(--ink-3); font-variant-numeric: tabular-nums; }
button.chip.cand.warn { border-color: var(--warn); }
button.chip.cand.bad { border-color: var(--bad); }
.v-fix { font-size: .85rem; color: var(--ink-2); margin-top: 4px; }
ol.steps { padding-left: 22px; margin: 0; }
ol.steps li, .cheat ul li { margin: 6px 0; }
.cheat ul { padding-left: 20px; margin: 0; }
dl.fixes dt { margin-top: 10px; }