.academy-share-dialog{width:min(460px,calc(100vw - 28px));max-height:90vh;padding:22px;border-radius:16px;overflow:auto;border:1px solid #d9e7f8;background:#fff;color:#19334e}.academy-share-dialog h2{font-size:20px;margin:0}.academy-share-dialog p{font-size:12px;line-height:1.6}.academy-share-dialog .share-close{float:right;border:0;background:transparent;color:#7890a6;font-size:22px}.academy-share-dialog canvas{display:block;width:100%;max-height:52vh;object-fit:contain;background:#f5f9ff;border-radius:10px}.academy-share-dialog label{font-size:12px;display:block;margin-top:14px}.academy-share-dialog input{display:block;width:100%;box-sizing:border-box;margin-top:7px;padding:10px;border:1px solid #dae7f6;border-radius:8px;color:#5d7b97}.academy-share-dialog footer{display:flex;gap:10px;margin-top:14px}.academy-share-dialog footer button{flex:1;padding:10px;border:0;border-radius:8px;background:#edf5ff;color:#2676b7}.academy-share-dialog footer button:last-child{background:#1679ed;color:#fff}.academy-share-dialog button:disabled{opacity:.4;cursor:default}
/* Reserve the preview before fetching cover/meta, so the centered dialog never jumps. */
.academy-share-dialog{max-height:calc(100dvh - 32px);animation:none!important;transition:none!important;transform:none!important}
.academy-share-dialog [data-share-status]{min-height:38px;margin:10px 0 12px;color:#6b8096}
.academy-share-dialog [data-share-preview]{height:min(48dvh,420px);display:flex;align-items:center;justify-content:center;padding:12px;background:#f5f9ff;border:1px solid #e2edf9;border-radius:12px;overflow:hidden;min-width:0}
.academy-share-dialog [data-share-preview]:empty::before{content:'正在准备分享预览';font-size:12px;color:#8196ac}
.academy-share-dialog [data-share-preview] canvas{display:block;flex:0 0 auto;width:0;height:0;max-width:none;max-height:none;object-fit:contain;border-radius:0;animation:none!important;transition:none!important;transform:none!important}
.academy-share-dialog footer{gap:12px}.academy-share-dialog footer button{min-height:44px;line-height:1.5}