.group-file-panel{max-width:1040px;margin:24px auto;padding:24px;border:1px solid #d0dfd9;border-radius:18px;background:#fff;color:#244a40}.group-file-panel h2{margin-top:0}.group-file-help{font-size:.9rem;line-height:1.7;color:#61746c}.group-file-form{display:flex;gap:12px;flex-wrap:wrap;align-items:end;padding:16px;background:#f0f6f3;border-radius:12px}.group-file-form label{display:grid;gap:6px}.group-file-form input{font:inherit;padding:10px;max-width:100%;border:1px solid #c8d7d0;border-radius:8px}.group-file-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:12px 0 24px}.group-file-card{padding:16px;border:1px solid #d3dfd9;border-radius:12px;overflow-wrap:anywhere}.group-file-card h3{font-size:1rem;margin:0 0 8px}.group-file-card button{margin:6px 6px 0 0}.group-file-panel button{font:inherit;min-height:44px;border:1px solid #c8d7d0;border-radius:10px;padding:8px 12px;background:#e8f2ed;color:#244a40;cursor:pointer}.group-file-panel button:disabled{opacity:.45}.group-file-status{min-height:28px}.group-file-preview{max-width:95vw;width:1100px;max-height:94vh;overflow:auto;border:0;border-radius:16px;padding:20px;background:#f2f6f3}.group-file-preview img{display:block;width:100%;height:auto;margin:16px auto}.group-file-preview::backdrop{background:#183d3266}.group-file-preview header{display:flex;gap:12px;align-items:center;justify-content:space-between;position:sticky;top:0;background:#f2f6f3;padding:8px}.group-file-preview button{min-height:44px;padding:8px 14px}.group-file-preview:fullscreen{width:100vw;max-height:none;height:100vh}@media(max-width:600px){.group-file-panel{margin:16px;padding:16px}.group-file-grid{grid-template-columns:1fr}}.group-teacher-dialog{box-sizing:border-box;width:min(1200px,96vw);max-height:94dvh;overflow:auto;padding:24px;border:1px solid var(--line,#d0dfd9);border-radius:18px;background:var(--paper,#fff);color:var(--ink,#244a40);font:inherit}.group-teacher-dialog::backdrop{background:#142b4677}.group-teacher-dialog>header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}.group-teacher-dialog>header h2{margin:0;font-size:1.4rem}.group-teacher-dialog>header div{display:flex;gap:6px;flex-wrap:wrap}.group-teacher-dialog>header button{font:inherit;padding:8px 12px;border:1px solid var(--line,#d0dfd9);border-radius:8px;background:var(--panel,#fff);color:inherit;cursor:pointer}.group-teacher-paragraphs{padding:16px;border:1px solid var(--line,#d0dfd9);border-radius:12px;background:var(--panel,#fff)}.group-teacher-paragraphs p{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.7;margin:0 0 14px}.group-teacher-paragraphs p:last-child{margin-bottom:0}.group-teacher-dialog .group-file-panel{max-width:none;margin:20px 0 0}.group-links{border-top:1px solid #d0dfd9;margin-top:24px;padding-top:12px}.group-links a{color:#235b91;font-weight:600;overflow-wrap:anywhere}.group-links .group-file-form label{flex:1;min-width:160px}.group-links .group-file-form input{min-width:0;width:100%}.group-file-panel [hidden]{display:none!important}@media(max-width:600px){.group-teacher-dialog,.group-teacher-dialog .group-file-panel{padding:14px}}