.audio-library-panel{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:0;background:white;border:1px solid #c4d7e5;border-top:4px solid #2474a6;border-radius:8px;overflow:hidden}
#mp3 #audio-stage{display:block;padding:16px;min-width:0}
#mp3 #audio-stage .audio-card{width:100%;min-width:0;margin:0;padding:0;border:0;background:transparent}
#mp3 #audio-stage .audio-card[hidden]{display:none!important}
#mp3 #audio-stage .audio-card h3{min-height:0;font-size:1.1rem;line-height:1.4;margin:0 0 8px}
#mp3 #audio-stage audio{width:100%;margin:12px 0}
#audio-lesson-list{max-height:300px;overflow-y:auto;overscroll-behavior:contain;padding:6px;border-left:1px solid #d7e4ee;scrollbar-gutter:stable}
.audio-lesson-button{display:flex;align-items:center;gap:8px;width:100%;text-align:left;border:1px solid transparent;border-radius:5px;background:white;color:#173650;padding:7px 9px;margin-bottom:2px;min-height:44px}
.audio-lesson-button span{flex-shrink:0;min-width:30px;text-align:center;background:#edf5fc;color:#2474a6;border-radius:4px;padding:5px;font-size:.875rem}
.audio-lesson-button strong{font-size:.95rem;line-height:1.3;overflow-wrap:break-word;font-weight:650}
.audio-lesson-button[aria-pressed=true]{background:#eaf3fb;border-color:#aacbe2}
.audio-lesson-button:hover{background:#f0f6fb}.audio-lesson-button:focus-visible{outline:3px solid #2474a6;outline-offset:-2px}
#audio-all-list{display:grid;grid-template-columns:1fr!important;gap:4px}#audio-all-list .audio-lesson-button{border-color:#d7e4ee}
@media(max-width:760px){.audio-library-panel{grid-template-columns:minmax(0,1fr)}#audio-lesson-list{max-height:150px;border-left:0;border-top:1px solid #d7e4ee;padding:5px}#mp3 #audio-stage{padding:12px 14px}#mp3 .audio-series{display:flex;flex-wrap:nowrap;overflow-x:auto;gap:6px;padding-bottom:6px}#mp3 .audio-series button{flex-shrink:0;white-space:nowrap}#mp3 #audio-stage .audio-card h3{font-size:1rem}}