:root {
  --bg: #f6f3ee;
  --paper: #fffdf9;
  --ink: #1f1b16;
  --muted: #6f665b;
  --line: #e2dbd0;
  --accent: #8a3b12;      /* rosin brown */
  --accent-soft: #f1e2d6;
  --vn1: #8a3b12;
  --vn2: #b5762a;
  --va: #3f6b5a;
  --vc: #2f4a7a;
  --extra: #6b4c8a;
  --flag: #c23b3b;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(40, 30, 20, .06), 0 6px 20px rgba(40, 30, 20, .06);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Songti SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f; --paper: #211d17; --ink: #f2ece2; --muted: #a99d8d; --line: #3a332a;
    --accent: #e0956a; --accent-soft: #3a2a1f; --vn1: #e0956a; --vn2: #e3b46a; --va: #7fbfa5;
    --vc: #8fb0e8; --extra: #b79ae0; --flag: #ff7a7a;
    --shadow: 0 1px 2px rgba(0,0,0,.4);
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.55; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
button { font: inherit; color: inherit; }

.top { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center;
  gap: 16px; padding: 12px 24px; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; }
.logo { color: var(--accent); display: grid; place-items: center; }
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 18px; letter-spacing: .2px; }
.brand-sub { font-size: 12px; color: var(--muted); }
.top-controls { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
select { font: inherit; padding: 7px 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper);
  color: var(--ink); max-width: 60vw; }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.lang button { border: 0; background: transparent; padding: 6px 12px; cursor: pointer; }
.lang button.on { background: var(--accent); color: var(--paper); }

main { max-width: 1180px; margin: 0 auto; padding: 24px 24px 40px; }
.hero h1 { font-family: var(--serif); font-size: clamp(24px, 3.2vw, 36px); line-height: 1.2; margin: 6px 0 4px; }
.hero p { margin: 0 0 12px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px 20px; }
.card h2 { font-family: var(--serif); font-size: 20px; margin: 0 0 10px; }
.card h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 18px 0 8px; }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }

.player { margin-top: 8px; }
.transport { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.play { width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--accent); color: var(--paper);
  display: grid; place-items: center; cursor: pointer; flex: none; }
.play:disabled { opacity: .4; cursor: default; }
.time { font-variant-numeric: tabular-nums; color: var(--muted); min-width: 92px; }
.now { display: flex; gap: 18px; flex-wrap: wrap; }
.now-item { display: flex; flex-direction: column; min-width: 64px; }
.now-item .lbl { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.now-item b { font-weight: 600; }

.timeline { position: relative; display: grid; grid-template-columns: 88px 1fr; gap: 6px 10px; margin-top: 18px;
  cursor: pointer; user-select: none; }
.part-lanes { display: contents; }
.row-label { font-size: 12px; color: var(--muted); align-self: center; text-align: right; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; }
.row-label.is-lead { color: var(--ink); font-weight: 700; }
.lane { position: relative; height: 22px; border-radius: 6px; background: color-mix(in srgb, var(--line) 45%, transparent);
  overflow: hidden; }
.lane.part { height: 26px; }
.seg { position: absolute; top: 0; bottom: 0; }
.seg.section { border-right: 2px solid var(--paper); display: flex; align-items: center; padding-left: 6px; font-size: 11px;
  color: var(--ink); white-space: nowrap; overflow: hidden; }
.seg.key { border-right: 1px solid var(--paper); font-size: 10px; display: flex; align-items: center; padding-left: 4px;
  white-space: nowrap; overflow: hidden; color: #fff; }
.seg.active { top: 9px; bottom: 9px; opacity: .35; border-radius: 3px; }
.seg.lead { top: 3px; bottom: 3px; border-radius: 4px; }
.seg.flag { top: auto; bottom: 0; height: 3px; background: var(--flag); }
.star { position: absolute; top: -1px; font-size: 13px; transform: translateX(-50%); color: var(--ink);
  text-shadow: 0 0 2px var(--paper); pointer-events: none; }
.playhead { position: absolute; top: -4px; bottom: -4px; width: 2px; background: var(--ink); pointer-events: none;
  left: 98px; transition: left .12s linear; box-shadow: 0 0 0 2px color-mix(in srgb, var(--paper) 70%, transparent); }
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; margin-top: 12px; align-items: center; }
.legend .hint { margin-left: auto; }
.sw { display: inline-block; width: 18px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: middle;
  font-style: normal; font-size: 12px; line-height: 10px; text-align: center; }
.sw.lead { background: var(--vn1); }
.sw.active { background: var(--vn1); opacity: .35; height: 4px; }
.sw.theme { width: auto; }
.sw.flag { background: var(--flag); height: 3px; }
.notice { background: var(--accent-soft); border-radius: 10px; padding: 10px 12px; margin: 12px 0 0; font-size: 14px; }
#warnings .notice { margin: 6px 0; }

.grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 20px; margin-top: 20px; align-items: start; }
@media (max-width: 860px) { .grid { grid-template-columns: 1fr; } .legend .hint { margin-left: 0; } }
.overview { font-family: var(--serif); font-size: 17px; margin: 4px 0 14px; }
.points { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.point { border: 1px solid var(--line); border-left: 4px solid var(--line); border-radius: 10px; padding: 10px 12px;
  cursor: pointer; transition: background .15s, border-color .15s; }
.point:hover { background: color-mix(in srgb, var(--accent-soft) 50%, transparent); }
.point.current { border-left-color: var(--accent); background: var(--accent-soft); }
.point .meta { display: flex; gap: 8px; align-items: center; font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.point .head { font-weight: 650; }
.point .txt { margin: 4px 0 0; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 11px; color: #fff; }
.badge { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent);
  white-space: nowrap; }
.mref { color: var(--accent); text-decoration: underline dotted; cursor: pointer; }
dl { margin: 8px 0 0; } dt { font-weight: 600; } dd { margin: 0 0 8px; color: var(--muted); }
details summary { cursor: pointer; margin-top: 14px; color: var(--muted); }

.glance { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; font-size: 14px; }
.glance dt { color: var(--muted); font-weight: 400; }
.glance dd { margin: 0; color: var(--ink); }
.var { border-top: 1px solid var(--line); padding: 8px 0; font-size: 14px; cursor: pointer; }
.var:first-child { border-top: 0; }
.var b { font-weight: 650; }
.bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-top: 4px; }
.bar > i { display: block; height: 100%; background: var(--accent); }
.method { padding-left: 18px; font-size: 13px; }
.foot { text-align: center; padding: 0 24px 28px; }
.autonext { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.autonext input { accent-color: var(--accent); }

.score-card { margin-top: 20px; }
.score-nav { display: flex; gap: 10px; align-items: center; }
.score-nav button { border: 1px solid var(--line); background: var(--paper); border-radius: 8px; width: 32px; height: 28px;
  cursor: pointer; font-size: 18px; line-height: 1; }
.score { background: #fff; border-radius: 10px; padding: 8px; overflow: hidden; }
.score svg { width: 100%; height: auto; display: block; }
.score g.measure { cursor: pointer; }
.score g.measure.qc-now .note use, .score g.measure.qc-now .note path,
.score g.measure.qc-now .rest use { fill: #a2400f; }
.score .qc-page { position: relative; width: 100%; cursor: pointer; }
.score .qc-page img { width: 100%; height: 100%; display: block; }
.score .qc-hl { position: absolute; background: rgba(232, 160, 110, .30); border-radius: 4px; pointer-events: none;
  mix-blend-mode: multiply; transition: left .15s, top .15s; }
.score .qc-box { fill: rgba(232, 160, 110, .28); stroke: none; pointer-events: none; }
.notice.soft { background: transparent; border: 1px dashed var(--line); color: var(--muted); }
.notice.soft summary { cursor: pointer; }
.notice.soft ul { margin: 6px 0 0; padding-left: 18px; font-size: 13px; }

/* ---------------------------------------------------------------- practice */
.practice { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-top: 14px;
  padding-top: 12px; border-top: 1px dashed var(--line); font-size: 14px; }
.practice-title { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.practice .speed { display: inline-flex; align-items: center; gap: 8px; }
.practice .speed input { width: 120px; accent-color: var(--accent); }
.practice .speed b { min-width: 3.2em; font-variant-numeric: tabular-nums; }
.pbtn { font: inherit; border: 1px solid var(--accent); color: var(--accent); background: var(--paper);
  border-radius: 999px; padding: 4px 12px; cursor: pointer; }
.pbtn.on { background: var(--accent); color: var(--paper); }
.pbtn.ghost { border-color: var(--line); color: var(--muted); }
.loop-info { color: var(--accent); font-weight: 600; }
.score .qc-loopbox { position: absolute; border: 2px dashed var(--accent); border-radius: 4px; pointer-events: none; }
.score g.measure.qc-inloop .staff path, .score g.measure.qc-inloop .barLine path { stroke: var(--accent); }
.score.picking, .score.picking * { cursor: crosshair !important; }
@media (max-width: 560px) { .practice .speed input { width: 90px; } }

/* ---------------------------------------------------------- recordings */
.rec-pick { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.rec-pick select { font-size: 14px; color: var(--ink); max-width: 220px; }
.compare-card { margin-top: 20px; position: relative; }
.compare-legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 13px; }
.compare-legend i { display: inline-block; width: 18px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: 6px; }
.compare-chart svg { width: 100%; height: auto; display: block; cursor: pointer; }
.compare-chart .sec-line { stroke: var(--line); stroke-width: 1; }
.compare-chart .sec-name { fill: var(--muted); font-size: 11px; }
.compare-chart .axis { fill: var(--muted); font-size: 11px; }
.compare-chart .grid { stroke: var(--line); stroke-dasharray: 2 4; }
.compare-chart .now { stroke: var(--ink); stroke-width: 1.5; opacity: .6; }
.compare-tip { position: absolute; pointer-events: none; background: var(--paper); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 10px; font-size: 13px; box-shadow: var(--shadow); white-space: nowrap; }
.compare-notes { margin: 10px 0 4px; padding-left: 18px; }
.compare-notes li { margin: 3px 0; }

/* library */
.lib-btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--paper); cursor: pointer; }
.lib-btn:hover { border-color: var(--accent); color: var(--accent); }
#library { width: min(760px, calc(100vw - 32px)); max-height: min(82vh, 900px); padding: 18px 20px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--paper); color: var(--ink); box-shadow: 0 20px 60px rgba(0,0,0,.25); }
#library::backdrop { background: rgba(20, 14, 8, .35); }
.lib-head { display: flex; justify-content: space-between; align-items: center; }
.lib-head h2 { font-family: var(--serif); margin: 0; font-size: 22px; }
.lib-x { border: 0; background: transparent; font-size: 26px; line-height: 1; cursor: pointer; color: var(--muted); }
#lib-q { width: 100%; margin: 12px 0 10px; padding: 10px 12px; font: inherit; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); }
#lib-q:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.lib-filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.lib-filters select { max-width: 100%; }
.lib-filters .chk { font-size: 14px; display: inline-flex; gap: 6px; align-items: center; }
#lib-count { margin: 10px 0 6px; }
#lib-list { display: grid; gap: 14px; }
.lib-work-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; align-items: baseline;
  border-bottom: 1px solid var(--line); padding-bottom: 4px; margin-bottom: 4px; }
.lib-work-title { font-family: var(--serif); font-weight: 700; }
.lib-item { display: grid; grid-template-columns: 1fr auto auto; gap: 10px; align-items: center; width: 100%; text-align: left;
  padding: 7px 8px; border: 0; border-radius: 8px; background: transparent; cursor: pointer; }
.lib-item:hover { background: var(--accent-soft); }
.lib-item.on { background: var(--accent-soft); font-weight: 600; }
.lib-meta { color: var(--muted); font-size: 13px; white-space: nowrap; }
.lib-badges { display: inline-flex; gap: 4px; }
.lib-badge { font-size: 11px; padding: 1px 6px; border-radius: 6px; background: var(--accent); color: var(--paper); }
.lib-badge.off { background: transparent; color: var(--muted); border: 1px solid var(--line); }
@media (max-width: 560px) {
  .lib-item { grid-template-columns: 1fr auto; }
  .lib-badges { grid-column: 1 / -1; }
}

/* bars to compare by ear (OMR scores) */
.score .qc-doubtbox { position: absolute; border: 2px dotted var(--flag); border-radius: 4px; pointer-events: none; }
.score g.measure.qc-doubt .staff path, .score g.measure.qc-doubt .barLine path { stroke: var(--flag); stroke-dasharray: 3 3; }
.doubts { margin: 0 0 12px; }
.doubt-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.doubt-chip { font-size: 13px; padding: 3px 9px; border-radius: 999px; border: 1px dotted var(--flag); background: var(--paper);
  cursor: pointer; }
.doubt-chip:hover { background: var(--accent-soft); }

/* bars no listening point covers */
.point.gap { border-style: dashed; border-left-width: 4px; background: transparent; color: var(--muted); }
.point.gap .head { font-weight: 500; }
.point.gap.current { color: var(--ink); }

/* the hidden attribute always wins over display rules */
[hidden] { display: none !important; }