:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --bad: #e11d48;
  --bad-soft: rgba(225, 29, 72, 0.14);
}
* { box-sizing: border-box; }
input[type=range] { accent-color: var(--accent); }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Malgun Gothic", sans-serif; }
body { padding-bottom: 96px; }
.top { padding: 20px 16px 4px; max-width: 1100px; margin: 0 auto; }
.top h1 { margin: 0; font-size: 22px; }
.sub { margin: 6px 0 0; color: var(--muted); font-size: 14px; }
main { max-width: 1100px; margin: 0 auto; padding: 8px 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin: 12px 0; }
h2 { margin: 0; font-size: 17px; }
.row { display: flex; align-items: center; }
.between { justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.gap { gap: 8px; }
.wrap { flex-wrap: wrap; }
.drop { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 28px 12px;
  border: 2px dashed #cbd5e1; border-radius: 12px; cursor: pointer; text-align: center; }
.drop strong { font-size: 17px; color: var(--accent); }
.drop span { color: var(--muted); font-size: 13px; }
.drop.over { background: var(--accent-soft); border-color: var(--accent); }
.status { margin-top: 12px; padding: 10px 12px; border-radius: 10px; background: #f1f5f9; font-size: 14px; }
.status.err { background: #ffe4e6; color: #9f1239; }
.notes { margin-top: 12px; font-size: 13px; color: var(--muted); }
.notes ul { padding-left: 18px; margin: 8px 0 0; }
.notes li { margin: 4px 0; }
.tip { font-size: 13px; color: var(--muted); margin: 8px 0; }
.seg { font-size: 14px; border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; cursor: pointer; }
.seg:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); }
.seg input { display: none; }

.track { display: grid; grid-template-columns: minmax(110px, 1.3fr) auto minmax(80px, 1fr) minmax(110px, 1fr) auto auto;
  gap: 8px; align-items: center; padding: 8px 0; border-top: 1px solid var(--line); font-size: 14px; }
.track:first-child { border-top: 0; }
.track .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.track .name small { display: block; font-weight: 400; color: var(--muted); font-size: 12px; }
.track .ms { display: flex; gap: 4px; }
.track select { width: 100%; font-size: 13px; padding: 4px; }
.track input[type=range] { width: 100%; }
.track .oct { font-size: 12px; color: var(--muted); white-space: nowrap; }
@media (max-width: 640px) {
  /* 1줄: 이름 · M S · 내려받기 / 2줄: 크기 · 악기 · 옥타브 */
  .track { grid-template-columns: 1fr 118px auto; grid-template-areas: "name ms dl" "vol inst oct"; row-gap: 6px; }
  .track .name { grid-area: name; } .track .ms { grid-area: ms; justify-self: end; } .track .dl { grid-area: dl; }
  .track .vol { grid-area: vol; } .track select { grid-area: inst; } .track .oct { grid-area: oct; }
  .track button { min-width: 40px; min-height: 36px; }
}
button { font: inherit; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 10px; cursor: pointer; }
button.on { background: var(--accent); color: #fff; border-color: var(--accent); }
button.solo.on { background: #f59e0b; border-color: #f59e0b; }
button.ghost { color: var(--accent); }
.downloads { margin-top: 12px; }
.flags { margin-top: 12px; padding: 10px 12px; border-radius: 10px; background: #fff1f2; color: #9f1239; font-size: 13px; }

/* overflow 를 #scoreWrap 에 두면 안쪽 sticky(보기 막대·나란히 원본)가 화면에 붙지 않는다 → #score 에만 */
#scoreWrap { background: #fff; border: 1px solid var(--line); border-radius: 14px; margin: 12px 0; padding: 0 0 8px; }
#score { position: relative; min-height: 200px; overflow-x: auto; }
.flag-box { position: absolute; background: var(--bad-soft); border: 1.5px solid var(--bad); border-radius: 3px; pointer-events: none; }

.player { position: fixed; left: 0; right: 0; bottom: 0; background: #1e293b; color: #fff; display: flex; flex-wrap: wrap;
  align-items: center; gap: 8px 16px; padding: 8px 16px calc(8px + env(safe-area-inset-bottom)); font-size: 14px; z-index: 10; }
.pmain, .pmore { display: flex; align-items: center; gap: 10px 14px; flex-wrap: wrap; }
.pmain { flex: 0 0 auto; }
.player button { background: #334155; color: #fff; border-color: #475569; min-height: 40px; min-width: 40px; }
.player button.big { font-size: 20px; width: 52px; }
.tstep { display: flex; align-items: center; gap: 6px; }
.tstep span { min-width: 44px; text-align: center; font-variant-numeric: tabular-nums; }
.player input[type=number] { width: 56px; font-size: 16px; padding: 4px; border-radius: 6px; border: 0; } /* 16px: iOS 입력 시 확대 방지 */
.player .tempo input { vertical-align: middle; width: 120px; }
.zoom button { margin-left: 4px; }
.pos { color: #cbd5e1; font-variant-numeric: tabular-nums; white-space: nowrap; }
#more { display: none; }
@media (min-width: 761px) {
  .tstep { display: none; }            /* 넓은 화면은 슬라이더로 충분 */
  .pmain .pos { order: 9; }
  .player { flex-wrap: nowrap; }
  .pmore { flex: 1 1 auto; }
  .player > .pmain + .pmore { margin-left: 4px; }
}
@media (max-width: 760px) {
  .player { padding-left: 10px; padding-right: 10px; }
  .pmain { width: 100%; flex-wrap: nowrap; gap: 6px; }
  .player button { min-width: 40px; padding: 6px 8px; }
  .player button.big { width: 48px; }
  .tstep span { min-width: 40px; }
  .pmain .pos { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; text-align: right; font-size: 12px; }
  #more { display: inline-block; }
  .pmore { display: none; width: 100%; padding-top: 6px; border-top: 1px solid #334155; }
  .pmore.open { display: flex; }
  .pmore .tempo input { width: 150px; }
}
.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: 90px; background: #0f172a; color: #fff;
  padding: 10px 14px; border-radius: 10px; font-size: 14px; z-index: 20; max-width: 90vw; }

.playbig { background: var(--accent); color: #fff; border-color: var(--accent); font-size: 16px; font-weight: 700; padding: 8px 16px; border-radius: 999px; }
.playbig.on { background: #f59e0b; border-color: #f59e0b; }
#trackBox > summary { cursor: pointer; font-size: 14px; color: var(--accent); margin: 6px 0; }

#upload.compact .drop { flex-direction: row; justify-content: center; padding: 10px 12px; }
#upload.compact .drop span, #upload.compact .notes { display: none; }
#upload.compact .drop strong { font-size: 15px; }
@media (max-width: 640px) {
  .top { padding-top: 14px; }
  .top h1 { font-size: 19px; }
  .sub { font-size: 13px; }
  main { padding: 4px 10px; }
  .card { padding: 12px; margin: 10px 0; }
  .drop { padding: 18px 10px; }
  .playbig { padding: 8px 14px; }
  #scoreWrap { margin: 10px -10px; border-radius: 0; border-left: 0; border-right: 0; }
  .toast { bottom: 120px; }
}

/* 원본 악보 보기 */
.viewbar { position: sticky; top: 0; border-radius: 14px 14px 0 0; z-index: 5; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 8px 12px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.vseg { display: flex; gap: 4px; }
.vseg button { border-radius: 999px; font-size: 14px; min-height: 36px; }
.origInfo { font-size: 13px; color: var(--muted); margin-left: auto; }
#scoreArea.both { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px; align-items: start; }
#orig { padding: 4px 8px; }
#scoreArea.both #orig { position: sticky; top: 52px; max-height: calc(100vh - 140px); overflow-y: auto; border-left: 1px solid var(--line); }
.opage { position: relative; margin: 10px auto 18px; max-width: 900px; border-radius: 6px; outline: 1px solid var(--line); background: #fff; }
.opage img { display: block; width: 100%; min-height: 200px; border-radius: 6px; }
.opage.cur { outline: 3px solid var(--accent); }
.obadge { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--muted); padding: 6px 8px; }
.opage.cur .obadge b::after { content: " ▶ 지금 여기"; color: var(--accent); }
.obadge button { margin-left: auto; font-size: 13px; color: var(--accent); padding: 4px 10px; min-height: 32px; }
@media (max-width: 899px) { .wide-only { display: none; } }