* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: #f4f6f8;
  color: #2b3440;
  line-height: 1.6;
}

.app-header {
  background: linear-gradient(135deg, #b8860b, #daa520);
  color: #fff;
  padding: 24px 32px;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.app-header h1 { margin: 0; font-size: 1.5rem; }
.app-header .subtitle { margin: 6px 0 0; font-size: .9rem; opacity: .95; }

main { max-width: 1200px; margin: 0 auto; padding: 24px 16px 60px; }

.hidden { display: none !important; }

/* --- ドロップゾーン --- */
.drop-zone {
  border: 3px dashed #c3ccd6;
  border-radius: 12px;
  background: #fff;
  padding: 40px 20px;
  text-align: center;
  transition: border-color .2s, background .2s;
}
.drop-zone.dragover { border-color: #daa520; background: #fdf6e3; }
.drop-zone.compact { padding: 12px 20px; }
.drop-zone.compact .drop-main, .drop-zone.compact .drop-sub,
.drop-zone.compact .drop-formats, .drop-zone.compact .help { display: none; }
.drop-main { font-size: 1.15rem; font-weight: 600; margin: 0 0 4px; }
.drop-sub { margin: 4px 0 12px; color: #7a8694; }
.drop-formats { margin-top: 16px; font-size: .85rem; color: #7a8694; }
.help { margin-top: 12px; font-size: .85rem; color: #55606c; }
.help summary { cursor: pointer; color: #b8860b; }
.help p { max-width: 640px; margin: 8px auto 0; }

/* --- ボタン --- */
.btn {
  display: inline-block;
  padding: 9px 20px;
  border: none;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  margin: 0 6px;
  transition: filter .15s;
}
.btn:hover { filter: brightness(1.08); }
.btn:focus-visible, .btn-link:focus-visible { outline: 2px solid #2b3440; outline-offset: 2px; }
.btn:disabled { opacity: .5; cursor: not-allowed; filter: none; }
.btn-primary { background: #b8860b; color: #fff; }
.btn-ghost { background: #eef1f4; color: #2b3440; border: 1px solid #c3ccd6; }

/* --- コントロール --- */
.controls {
  background: #fff;
  border-radius: 12px;
  padding: 16px 20px;
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 36px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
.control-group { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; }
.control-group label { cursor: pointer; white-space: nowrap; }
.control-label { font-weight: 700; font-size: .82rem; color: #7a8694; text-transform: uppercase; letter-spacing: .04em; }
.note { color: #9aa4af; font-size: .8rem; }
#zoom { width: 140px; }

/* --- 書き出しバー --- */
.export-bar {
  background: #fff;
  border-radius: 12px;
  padding: 12px 20px;
  margin-top: 12px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
.stats { margin-left: auto; font-size: .85rem; color: #55606c; }

/* --- 再生バー --- */
.play-bar {
  background: #fff;
  border-radius: 12px;
  padding: 12px 20px;
  margin-top: 12px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
  font-size: .9rem;
}
.play-item { display: flex; align-items: center; gap: 6px; white-space: nowrap; cursor: pointer; }
#tempo { width: 140px; }
#volume { width: 110px; }
#tempo-value { display: inline-block; min-width: 2.4em; text-align: right; font-variant-numeric: tabular-nums; }
.btn-link {
  background: none;
  border: none;
  padding: 0 2px;
  color: #b8860b;
  font-size: .82rem;
  text-decoration: underline;
  cursor: pointer;
}
#play-btn.playing { background: #8c2f2f; }

/* --- 警告 --- */
.warnings {
  margin-top: 12px;
  background: #fff8e6;
  border: 1px solid #e8c96a;
  border-radius: 10px;
  padding: 12px 18px;
  font-size: .88rem;
  color: #6b5518;
}
.warnings ul { margin: 6px 0 0; padding-left: 20px; }

/* --- 楽譜 --- */
.score-wrap {
  margin-top: 16px;
  overflow-x: auto;
}
#score { background: transparent; }
#score > div { margin: 0 auto 20px; }
#score svg {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,.12);
  border-radius: 4px;
  display: block;
  margin: 0 auto 20px;
}

.fingering-overlay text { pointer-events: none; user-select: none; }

/* --- 説明 --- */
.about {
  margin-top: 32px;
  padding: 20px 24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
  font-size: .9rem;
  color: #55606c;
}
.about h2 { font-size: 1.05rem; color: #2b3440; margin: 0 0 8px; }
.about ol { padding-left: 22px; margin: 0 0 20px; }
.about li { margin-bottom: 4px; }
.about code { background: #eef1f4; padding: 1px 5px; border-radius: 4px; font-size: .85em; }
.about dl { margin: 0; }
.about dt { font-weight: 600; color: #2b3440; margin-top: 10px; }
.about dd { margin: 2px 0 0; }

.loading {
  text-align: center;
  padding: 30px;
  font-size: 1.05rem;
  color: #7a8694;
}

.app-footer {
  text-align: center;
  padding: 20px;
  font-size: .8rem;
  color: #9aa4af;
}

/* --- 印刷（PDF書き出し） --- */
@media print {
  .app-header, .drop-zone, .controls, .export-bar, .play-bar, .warnings, .app-footer, .loading, .about { display: none !important; }
  #cursorImg-0, img[id^="cursorImg"] { display: none !important; }
  body { background: #fff; }
  main { max-width: none; padding: 0; }
  .score-wrap { overflow: visible; margin: 0; }
  #score svg {
    box-shadow: none;
    border-radius: 0;
    width: 100% !important;
    height: auto !important;
    margin: 0;
    page-break-after: always;
    break-after: page;
  }
  #score > div:last-child svg { page-break-after: auto; break-after: auto; }
}

/* --- スマートフォン --- */
@media (max-width: 640px) {
  .app-header { padding: 16px 20px; }
  .app-header h1 { font-size: 1.25rem; }
  main { padding: 16px 10px 40px; }
  .drop-zone { padding: 28px 12px; }
  .btn { margin: 4px; }
  .controls { gap: 12px 24px; }
  .control-group label, .play-item { white-space: normal; }
  .stats { margin-left: 0; width: 100%; }
  #zoom, #tempo { width: 120px; }
}