.bgc-room{--bgc-ink:#213438;--bgc-muted:#51666a;--bgc-line:#dce6e5;--bgc-soft:#f0f6f4;--bgc-accent:#17696c;background:#fff;color:var(--bgc-ink);padding:clamp(12px,3vw,28px);font:16px/1.5 system-ui,sans-serif;box-sizing:border-box}
.bgc-room *{box-sizing:border-box}
.bgc-room [hidden]{display:none!important}
.bgc-room h2{color:var(--bgc-ink);font:500 22px/1.25 system-ui,sans-serif;margin:0 0 12px;overflow-wrap:anywhere}
.bgc-room a{color:var(--bgc-accent);text-decoration:underline}
.bgc-room p{margin:0 0 16px}
.bgc-room .bgc-room-intro{color:var(--bgc-muted)}
.bgc-room-links{display:flex;gap:16px;flex-wrap:wrap;padding:0 0 18px;margin:0 0 22px;border-bottom:1px solid var(--bgc-line)}
.bgc-room-current{background:var(--bgc-soft);padding:18px;margin-bottom:24px;border-radius:8px}
.bgc-room-current h2{font-size:19px}
.bgc-room-current [data-current-list],.bgc-room-track-buttons{display:flex;gap:8px;flex-wrap:wrap}
.bgc-room button{font:inherit;line-height:1.4;min-height:44px;border:1px solid var(--bgc-line);border-radius:7px;background:#fff;color:var(--bgc-ink);padding:10px 14px;cursor:pointer;white-space:normal;max-width:100%;overflow-wrap:anywhere}
.bgc-room button:hover{background:var(--bgc-soft)}
.bgc-room button[aria-pressed=true]{background:var(--bgc-accent);color:#fff;border-color:var(--bgc-accent)}
.bgc-room :focus-visible,.bgc-recording :focus-visible{outline:3px solid #17696c;outline-offset:3px}
.bgc-room-controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(150px,.55fr);gap:16px;margin-bottom:12px}
.bgc-room label{display:block;font-size:14px}
.bgc-room input,.bgc-room select{display:block;width:100%;min-height:46px;font:16px/1.4 system-ui,sans-serif;margin:5px 0 0;padding:10px 12px;border:1px solid var(--bgc-line);border-radius:6px;background:#fff;color:var(--bgc-ink)}
.bgc-room-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:28px;align-items:start}
.bgc-room .bgc-room-song-list{padding:0;margin:0;list-style:none}
.bgc-room-song-list li{padding:0;margin:0;border-bottom:1px solid var(--bgc-line)}
.bgc-room button.bgc-room-song{width:100%;display:block;text-align:left;border:0;border-radius:0;padding:15px 10px}
.bgc-room button.bgc-room-song[aria-pressed=true]{background:var(--bgc-soft);color:var(--bgc-ink);box-shadow:inset 3px 0 var(--bgc-accent)}
.bgc-room-song span{display:block}
.bgc-room .bgc-room-muted{color:var(--bgc-muted);font-size:14px}
.bgc-room-detail{min-width:0;background:var(--bgc-soft);padding:20px;border-radius:9px}
.bgc-room-track-buttons{margin:16px 0}
.bgc-room audio,.bgc-recording audio{display:block;width:100%;max-width:100%;margin:12px 0 16px}
.bgc-room [data-download]{display:inline-block;margin-bottom:20px}
.bgc-room-note{white-space:pre-wrap;border-left:3px solid var(--bgc-accent);padding-left:12px}
.bgc-room-pagination{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:16px}
.bgc-recording{margin:20px 0}
.bgc-recording figcaption{font-weight:600}
@media(max-width:650px){.bgc-room-layout,.bgc-room-controls{grid-template-columns:1fr}.bgc-room{padding:14px}.bgc-room-detail{padding:16px}}