body.theme-light{--bg-primary: #f5f7fa;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-sidebar: #1f2937;--bg-input: #ffffff;--bg-hover: #f3f4f6;--text-primary: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af;--border-color: #e5e7eb;--border-light: #f3f4f6;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--table-header-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--table-row-hover: #f9fafb;--table-border: #f0f0f0}body.theme-dark{--bg-primary: #111827;--bg-secondary: #1f2937;--bg-card: #1f2937;--bg-sidebar: #111827;--bg-input: #374151;--bg-hover: #374151;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-muted: #9ca3af;--border-color: #374151;--border-light: #4b5563;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--table-header-bg: linear-gradient(135deg, #4f46e5 0%, #6d28d9 100%);--table-row-hover: #374151;--table-border: #374151}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:var(--text-primary, #333);background-color:var(--bg-primary, #f5f7fa);transition:background-color .3s ease,color .3s ease}body.theme-dark .table-container,body.theme-dark .table-wrapper,body.theme-dark .data-table,body.theme-dark .search-box,body.theme-dark .form-wrapper,body.theme-dark .form-card,body.theme-dark .page-content,body.theme-dark .card{background:var(--bg-card)!important;transition:background-color .3s ease}body.theme-dark .table-header h1,body.theme-dark .page-header h1,body.theme-dark h1,body.theme-dark h2,body.theme-dark h3{color:var(--text-primary)!important}body.theme-dark .table-header p,body.theme-dark .page-header p,body.theme-dark p{color:var(--text-secondary)!important}body.theme-dark .data-table tbody .table-row,body.theme-dark .data-table tbody tr{border-bottom-color:var(--border-color)!important}body.theme-dark .data-table tbody .table-row:hover,body.theme-dark .data-table tbody tr:hover{background:var(--bg-hover)!important}body.theme-dark .data-table td,body.theme-dark .data-table .name-cell,body.theme-dark .data-table .reg-cell{color:var(--text-primary)!important}body.theme-dark .search-box{border-color:var(--border-color)!important}body.theme-dark .search-input{background:transparent!important;color:var(--text-primary)!important}body.theme-dark .search-input::placeholder{color:var(--text-muted)!important}body.theme-dark .btn-download,body.theme-dark .page-btn,body.theme-dark .page-number{background:var(--bg-hover)!important;border-color:var(--border-color)!important;color:var(--text-secondary)!important}body.theme-dark .page-number.active{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)!important;color:#fff!important}body.theme-dark .no-data-content,body.theme-dark .no-data-cell{color:var(--text-muted)!important}body.theme-dark .form-group label{color:var(--text-primary)!important}body.theme-dark .form-group input,body.theme-dark .form-group select,body.theme-dark .form-group textarea{background:var(--bg-input)!important;border-color:var(--border-color)!important;color:var(--text-primary)!important}body.theme-dark .form-group input::placeholder,body.theme-dark .form-group textarea::placeholder{color:var(--text-muted)!important}body.theme-dark .form-group input:disabled,body.theme-dark .disabled-input{background:var(--bg-hover)!important;color:var(--text-secondary)!important}body.theme-dark .cancel-btn,body.theme-dark .btn-secondary{background:var(--bg-hover)!important;border-color:var(--border-color)!important;color:var(--text-secondary)!important}body.theme-dark .helper-text{color:var(--text-muted)!important}body.theme-dark .form-section,body.theme-dark .form-wrapper,body.theme-dark .student-container,body.theme-dark .staff-container,body.theme-dark .form-container,body.theme-dark .course-container,body.theme-dark .batch-container,body.theme-dark .user-management-container,body.theme-dark .organisation-container{background:var(--bg-card)!important}body.theme-dark .page-header,body.theme-dark .section-header{border-bottom-color:var(--border-color)!important}body.theme-dark .section-header h2{color:var(--text-primary)!important}body.theme-dark .form-actions{border-top-color:var(--border-color)!important}body.theme-dark .form-group input.readonly,body.theme-dark .form-group input[readonly]{background:var(--bg-hover)!important;color:var(--text-secondary)!important}body.theme-dark .dropdown-menu{background:var(--bg-card)!important;border-color:var(--border-color)!important}body.theme-dark .dropdown-search{background:var(--bg-hover)!important;border-bottom-color:var(--border-color)!important}body.theme-dark .dropdown-input,body.theme-dark .searchable-dropdown .search-input{background:var(--bg-input)!important;border-color:var(--border-color)!important;color:var(--text-primary)!important}body.theme-dark .dropdown-item{border-bottom-color:var(--border-color)!important;color:var(--text-primary)!important}body.theme-dark .dropdown-item:hover{background:var(--bg-hover)!important}body.theme-dark .dropdown-empty,body.theme-dark .clear-btn,body.theme-dark .dropdown-arrow{color:var(--text-muted)!important}body.theme-dark .clear-btn:hover,body.theme-dark .dropdown-arrow:hover{color:var(--text-primary)!important}body.theme-dark .location-info{background:var(--bg-hover)!important;border-color:var(--border-color)!important}body.theme-dark .location-coords{color:var(--text-secondary)!important}body.theme-dark .image-preview{background:var(--bg-hover)!important;border-color:var(--border-color)!important}body.theme-dark .upload-btn{background:var(--bg-hover)!important;border-color:var(--border-color)!important;color:var(--text-secondary)!important}body.theme-dark .upload-btn:hover{background:var(--border-color)!important;color:var(--text-primary)!important}body.theme-dark .upload-hint{color:var(--text-muted)!important}body.theme-dark .btn-view-map{background:var(--bg-hover)!important;border-color:#667eea!important;color:#667eea!important}body.theme-dark .btn-view-map:hover{background:#667eea!important;color:#fff!important}body.theme-dark .toast-container .toast{background:var(--bg-card)!important;border-color:var(--border-color)!important}body.theme-dark ::-webkit-scrollbar{width:8px;height:8px}body.theme-dark ::-webkit-scrollbar-track{background:var(--bg-secondary)}body.theme-dark ::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}body.theme-dark ::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}