.audio-practice{margin:26px 0}.audio-practice>summary{padding:16px 18px;background:#edf3f8;border:1px solid var(--line);border-radius:8px;line-height:1.5}.audio-practice[open]>summary{margin-bottom:16px}.audio-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0}.audio-card{min-width:0;padding:18px;background:#fff;border:1px solid var(--line);border-radius:8px}.audio-card .audio-phrase{font-size:21px;font-weight:700;line-height:1.4;margin:0 0 9px;overflow-wrap:anywhere}.audio-card .audio-note{font-size:15px;line-height:1.55;color:var(--muted);margin:0}.audio-card audio{width:100%;max-width:100%;margin:14px 0 0}.audio-card details{margin-top:12px}.audio-card summary{font-size:15px}.audio-card details p{font-size:16px;margin-bottom:0}.audio-grid.dialogue-audio{grid-template-columns:1fr}.audio-intro-note{font-size:15px;color:var(--muted)}@media(max-width:600px){.audio-grid{grid-template-columns:1fr}.audio-card{padding:16px}.audio-practice>summary{padding:13px 14px}}

.lesson-video{position:relative;width:100%;aspect-ratio:16/9;background:#122c49;border-radius:10px;overflow:hidden;margin:24px 0 12px}.lesson-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-caption{font-size:14px;color:var(--muted)}.video-next-step{padding:24px;background:#edf3f8;border:1px solid var(--line);border-radius:8px}.video-next-step p{font-size:17px}.video-next-step .button{max-width:100%}