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.card-body{max-height:2000px;opacity:1;overflow:hidden;transition:max-height .4s ease-in-out,opacity .3s ease,padding .3s ease}.admin-card.collapsed .card-body{max-height:0;opacity:0;padding-top:0;padding-bottom:0}.admin-card.collapsed .card-header{border-bottom:none}.admin-card .card-body{padding:1.5rem}.system-overview,.user-management,.document-management{grid-column:1 / -1}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:1rem}.stat-item{padding:1.5rem;background:var(--panel);border:1px solid var(--border);border-radius:calc(var(--radius) - 4px);transition:all .2s ease}.stat-item:hover{border-color:var(--primary);background:var(--bg)}.stat-label{font-size:.875rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}.stat-value{font-size:2.5rem;font-weight:700;color:var(--primary);line-height:1.2;margin-bottom:.5rem}.stat-description{font-size:.875rem;color:var(--muted);line-height:1.4}.storage-warning{margin-top:1.5rem;padding:1rem 1.25rem;background:rgba(var(--danger-rgb),.1);border:1px solid var(--danger);border-radius:calc(var(--radius) - 4px);color:var(--text);font-size:.9rem;line-height:1.5}.render-service-section{margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border)}.section-title{font-size:1.25rem;font-weight:600;color:var(--heading-2);margin:0 0 1rem}.service-status{display:flex;flex-direction:column;gap:.75rem;padding:1.5rem;background:var(--panel);border:1px solid var(--border);border-radius:calc(var(--radius) - 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.card-header,.admin-card .card-body{padding:1rem}.admin-card .collapse-icon{font-size:.9rem}}[data-theme=dark] .admin-card:hover{box-shadow:0 15px 40px #000c}[data-theme=dark] .storage-warning{background:rgba(var(--danger-rgb),.15);border-color:rgba(var(--danger-rgb),.5)}.admin-modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000b3;display:flex;justify-content:center;align-items:center;z-index:9999;padding:2rem}.admin-modal{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:0 20px 60px #0000004d;max-width:600px;width:100%;max-height:90vh;display:flex;flex-direction:column}.admin-modal-large{max-width:95vw;width:95vw}.admin-modal-form{max-width:800px;width:90vw}.admin-modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2rem;border-bottom:1px solid var(--border);background:var(--panel);border-radius:50px 50px 0 0}.admin-modal-header h2{font-size:1.5rem;font-weight:600;color:var(--heading-2);margin:0}.close-btn{background:none;border:none;font-size:2rem;color:var(--muted);cursor:pointer;padding:0;width:2rem;height:2rem;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s ease}.close-btn:hover{background:var(--bg);color:var(--text)}.admin-modal-body{padding:2rem;overflow-y:auto;flex:1}.search-filter-container{display:flex;gap:1rem;align-items:center;margin-bottom:1.5rem}.search-input{flex:1;padding:.75rem 1rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;background:var(--panel);color:var(--text);transition:all .2s ease}.search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.1)}.filter-info{font-size:.875rem;color:var(--muted);white-space:nowrap}.users-table-container{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}.users-table{width:100%;border-collapse:collapse;font-size:.9rem}.users-table thead{background:var(--panel);position:sticky;top:0;z-index:10}.users-table th{padding:1rem;text-align:left;font-weight:600;color:var(--heading-2);border-bottom:2px solid var(--border);white-space:nowrap}.sortable-header{cursor:pointer;-webkit-user-select:none;user-select:none;transition:background .15s ease}.sortable-header:hover{background:var(--bg)}.sort-indicator{display:inline-flex;align-items:center;gap:.25rem;margin-left:.5rem;font-size:.75rem}.sort-label{font-size:.7rem;color:var(--muted);text-transform:uppercase;font-weight:500}.users-table td{padding:.875rem 1rem;border-bottom:1px solid var(--border);color:var(--text)}.users-table tbody tr{transition:background .15s ease}.users-table tbody tr:hover{background:var(--bg)}.users-table tbody tr:last-child td{border-bottom:none}.column-filter{display:block;margin-top:.5rem;padding:.375rem .5rem;border:1px solid var(--border);border-radius:calc(var(--radius) - 4px);font-size:.8rem;background:var(--bg);color:var(--text);cursor:pointer;width:100%;transition:all .2s ease}.column-filter:hover{border-color:var(--primary)}.column-filter:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px rgba(var(--primary-rgb),.1)}.email-cell{font-family:monospace;font-size:.85rem;max-width:250px;overflow:hidden;text-overflow:ellipsis}.affiliation-cell{max-width:200px;overflow:hidden;text-overflow:ellipsis}.date-cell{font-size:.85rem;color:var(--muted);white-space:nowrap}.role-badge{display:inline-block;padding:.25rem .75rem;border-radius:calc(var(--radius) - 4px);font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.role-user{background:#64748b26;color:#64748b}.role-student{background:#3b82f626;color:#3b82f6}.role-mentor{background:#10b98126;color:#10b981}.role-admin{background:#ef444426;color:#ef4444}[data-theme=dark] .role-user{background:#64748b40;color:#94a3b8}[data-theme=dark] .role-student{background:#3b82f640;color:#60a5fa}[data-theme=dark] .role-mentor{background:#10b98140;color:#34d399}[data-theme=dark] .role-admin{background:#ef444440;color:#f87171}.user-management-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}.management-item{padding:1.5rem;background:var(--panel);border:1px solid var(--border);border-radius:calc(var(--radius) - 4px);cursor:pointer;transition:all .2s ease}.management-item:hover{border-color:var(--primary);background:var(--bg);transform:translateY(-2px);box-shadow:var(--shadow)}.management-item h3{font-size:1.125rem;font-weight:600;color:var(--heading-2);margin:0 0 .5rem}.management-item p{font-size:.875rem;color:var(--muted);margin:0;line-height:1.4}.user-finder-results{min-height:300px}.empty-state{padding:3rem 2rem;text-align:center;font-size:1rem;color:var(--muted);line-height:1.6}.edit-user-btn{padding:.5rem 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var(--border)}.form-btn-secondary:hover{background:var(--bg);border-color:var(--muted)}.form-btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.session-id-cell{font-family:monospace;font-size:.8rem;color:var(--muted);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-agent-cell{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.85rem}.session-actions{display:flex;gap:.5rem}.session-action-btn{padding:.4rem .75rem;border:none;border-radius:calc(var(--radius) - 4px);font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.session-action-btn.danger{background:#ef444426;color:#ef4444}.session-action-btn.danger:hover{background:#ef444440;transform:translateY(-1px)}.session-action-btn.warning{background:#f59e0b26;color:#f59e0b}.session-action-btn.warning:hover{background:#f59e0b40;transform:translateY(-1px)}[data-theme=dark] .session-action-btn.danger{background:#ef444440;color:#f87171}[data-theme=dark] .session-action-btn.warning{background:#f59e0b40;color:#fbbf24}.role-assignment-controls{display:flex;flex-direction:column;gap:1.5rem;margin-bottom:1.5rem}.role-selection-row{display:flex;gap:1rem;align-items:flex-end}.role-select{padding:.75rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;background:var(--panel);color:var(--text);cursor:pointer;transition:all .2s ease}.role-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.1)}.user-checkbox{width:1.125rem;height:1.125rem;cursor:pointer;accent-color:var(--primary)}.selected-row{background:rgba(var(--primary-rgb),.08)}.selected-row:hover{background:rgba(var(--primary-rgb),.12)!important}.status-badge{display:inline-block;padding:.25rem .75rem;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.status-badge.status-draft{background:#e5e7eb;color:#374151}.status-badge.status-submitted{background:#dbeafe;color:#1e40af}.status-badge.status-under_review{background:#fef3c7;color:#92400e}.status-badge.status-finished{background:#d1fae5;color:#065f46}.status-badge.status-graded{background:#e0e7ff;color:#3730a3}.version-badge{display:inline-block;padding:.25rem .5rem;background:var(--panel);border:1px solid var(--border);border-radius:6px;font-size:.875rem;font-weight:600;color:var(--primary);font-family:Courier New,monospace}.admin-table td span[title]{font-size:1.25rem;display:inline-block;min-width:1.5rem;text-align:center}label.admin-btn{display:inline-flex;align-items:center;justify-content:center}label.admin-btn 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var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:.95rem;cursor:pointer;transition:border-color .2s ease}.admin-filter-select:focus{outline:none;border-color:var(--primary)}.admin-btn{padding:.75rem 1.5rem;border:none;border-radius:var(--radius);font-size:.95rem;font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap}.admin-btn-primary{background:var(--primary);color:#fff}.admin-btn-primary:hover{background:var(--primary-dark, var(--primary));transform:translateY(-1px);box-shadow:0 4px 8px #00000026}.admin-btn-secondary{background:var(--panel);color:var(--text);border:1px solid var(--border)}.admin-btn-secondary:hover{background:var(--bg);border-color:var(--primary)}.admin-btn-danger{background:#dc2626;color:#fff}.admin-btn-danger:hover{background:#b91c1c;transform:translateY(-1px);box-shadow:0 4px 8px #dc26264d}.admin-result-count{color:var(--muted);font-size:.9rem;margin-bottom:1rem}.admin-table-wrapper{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:1rem}.admin-table{width:100%;border-collapse:collapse;font-size:.9rem}.admin-table thead{background:var(--panel);position:sticky;top:0;z-index:10}.admin-table th{padding:1rem;text-align:left;font-weight:600;color:var(--heading-2);border-bottom:2px solid var(--border);white-space:nowrap}.admin-table td{padding:.875rem 1rem;border-bottom:1px solid var(--border);color:var(--text)}.admin-table tbody tr{transition:background .15s ease}.admin-table tbody tr:hover{background:var(--bg)}.admin-table tbody tr:last-child td{border-bottom:none}.admin-form-section{margin-bottom:1.5rem}.admin-form-section:last-child{margin-bottom:0}.admin-form-section label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text)}.admin-form-section input[type=text],.admin-form-section 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1rem;color:var(--heading-2);font-size:1.1rem}.document-info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.document-info-item{display:flex;flex-direction:column;gap:.25rem}.document-info-label{font-size:.85rem;color:var(--muted);font-weight:500}.document-info-value{font-size:.95rem;color:var(--text)}.file-list{display:flex;flex-direction:column;gap:.75rem}.file-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .2s ease}.file-item:hover{border-color:var(--primary)}.file-icon{font-size:1.5rem;flex-shrink:0}.file-info{flex:1;min-width:0}.file-name{font-weight:500;color:var(--text);margin-bottom:.25rem;word-break:break-word}.file-meta{font-size:.85rem;color:var(--muted)}.file-actions{display:flex;gap:.5rem;flex-shrink:0}.file-btn{padding:.5rem 1rem;border:none;border-radius:calc(var(--radius) - 2px);font-size:.875rem;cursor:pointer;transition:all .2s ease;white-space:nowrap}.file-btn-download{background:var(--primary);color:#fff}.file-btn-download:hover{background:var(--primary-dark, var(--primary));transform:translateY(-1px)}.file-btn-delete{background:transparent;color:#dc2626;border:1px solid #dc2626}.file-btn-delete:hover{background:#dc2626;color:#fff}.upload-section{background:var(--bg);border:2px dashed var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:1.5rem;text-align:center}.upload-section h3{margin:0 0 1rem;color:var(--heading-2)}.upload-controls{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.editor-list{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.5rem}.editor-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius)}.editor-info{flex:1;min-width:0}.editor-name{font-weight:500;color:var(--text);margin-bottom:.25rem}.editor-meta{font-size:.85rem;color:var(--muted)}.editor-role{padding:.25rem .75rem;border-radius:12px;font-size:.85rem;font-weight:500;white-space:nowrap}.editor-role.owner{background:#3b82f61a;color:#3b82f6}.editor-role.editor{background:#22c55e1a;color:#22c55e}.editor-role.viewer{background:#9ca3af1a;color:#9ca3af}.editor-role.mentor{background:#a855f71a;color:#a855f7}.editor-actions{display:flex;gap:.5rem}.add-editor-section{background:var(--bg);border:2px dashed var(--border);border-radius:var(--radius);padding:2rem;margin-top:1.5rem}.add-editor-section h3{margin:0 0 1rem;color:var(--heading-2)}.add-editor-form{display:flex;gap:1rem;align-items:flex-end;flex-wrap:wrap}.add-editor-form>div{flex:1;min-width:200px}.version-list{display:flex;flex-direction:column;gap:.75rem}.version-item{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius)}.version-info{flex:1;min-width:0}.version-header{display:flex;align-items:center;gap:.5rem;margin-bottom:.25rem}.version-meta{font-size:.85rem;color:var(--muted)}.version-actions{display:flex;gap:.5rem}