.lesson-stage[data-v-f872a9d8]{background:#fff;border:1px solid #e8e8e8;border-radius:6px;overflow:hidden;margin-bottom:16px}.stage-controls[data-v-f872a9d8]{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-wrap:wrap;flex-wrap:wrap;gap:10px;padding:10px 12px;background:#fafafa;border-bottom:1px solid #e8e8e8}.material-select[data-v-f872a9d8]{-ms-flex:1;flex:1;min-width:160px;max-width:360px}.material-page[data-v-f872a9d8]{min-height:200px;background:#f5f5f5}.material-page iframe[data-v-f872a9d8]{width:100%;height:65vh;max-height:680px;min-height:360px;display:block;border:0;background:#fff}.material-page video[data-v-f872a9d8]{width:100%;max-height:65vh;display:block;margin:auto}.material-page img[data-v-f872a9d8]{display:block;max-width:100%;max-height:65vh;object-fit:contain;margin:auto}.material-html[data-v-f872a9d8]{padding:18px;background:#fff;color:#333;overflow:auto}.material-html[data-v-f872a9d8] img{max-width:100%;height:auto}.material-status[data-v-f872a9d8]{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:center;justify-content:center;gap:10px;padding:10px;color:#666}.lesson-stage[data-v-f872a9d8]:-ms-fullscreen{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;border:0;border-radius:0}.lesson-stage[data-v-f872a9d8]:fullscreen{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;border:0;border-radius:0}.lesson-stage:-ms-fullscreen .material-page[data-v-f872a9d8]{-ms-flex:1;flex:1;min-height:0;overflow:auto}.lesson-stage:fullscreen .material-page[data-v-f872a9d8]{-ms-flex:1;flex:1;min-height:0;overflow:auto}.lesson-stage:-ms-fullscreen iframe[data-v-f872a9d8]{height:100%;min-height:0}.lesson-stage:fullscreen iframe[data-v-f872a9d8]{height:100%;min-height:0}.lesson-stage:-ms-fullscreen img[data-v-f872a9d8],.lesson-stage:-ms-fullscreen video[data-v-f872a9d8]{max-height:calc(100vh - 70px)}.lesson-stage:fullscreen img[data-v-f872a9d8],.lesson-stage:fullscreen video[data-v-f872a9d8]{max-height:calc(100vh - 70px)}