/* 整体乳白磨砂：谱例、说明与操作区共用玻璃面板。 */
#scrim{background:rgba(30,43,40,.19)}
#sheet{background:rgba(248,250,247,.68);border:1px solid rgba(255,255,255,.85);border-radius:26px;backdrop-filter:blur(26px) saturate(135%);-webkit-backdrop-filter:blur(26px) saturate(135%);box-shadow:0 24px 72px rgba(23,40,34,.23),inset 0 1px 0 rgba(255,255,255,.8)}
#sheet.form-chart{background:rgba(248,250,247,.68)}
#sheet #content{background:transparent;border:1px solid transparent;border-radius:17px;padding:14px;min-width:0}
#sheet #closeSheet{z-index:5;border-radius:50%;background:rgba(255,255,255,.6);color:#52635a;line-height:1}
#sheet #closeSheet:hover{background:rgba(255,255,255,.9)}
#sheet .playbar{background:rgba(255,255,255,.15);border:0;border-top:1px solid rgba(255,255,255,.6);border-radius:0;padding:12px 14px;margin-top:12px;box-shadow:none}
#sheet.harmony-detail .playbar{bottom:0}
#sheet .excerpt-card{background:transparent}
#sheet .material-library-footer{background:rgba(248,250,246,.92)}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){#sheet,#sheet.form-chart,#sheet .playbar{background:#f7f9f5}}
@media(prefers-reduced-transparency:reduce){#sheet,#sheet.form-chart,#sheet .playbar{background:#f7f9f5;backdrop-filter:none;-webkit-backdrop-filter:none}}
@media(max-width:580px){#sheet{border-radius:22px}#sheet #content{padding:10px;border-radius:14px}#sheet .playbar{padding:10px 12px}}

#sheet #harmonyExcerpt{background:transparent}

/* 曲式图各段沿用浮窗磨砂底色，去除内部白色卡片。 */
#sheet.form-chart .chart-scroll{background:transparent}