body {
            padding-top: 20px;
            padding-bottom: 40px;
        }
        .form-control:focus, .form-select:focus {
            border-color: #6c757d;
            box-shadow: 0 0 0 0.25rem rgba(108, 117, 125, 0.25);
        }
        .btn-primary {
            background-color: #0d6efd;
            border-color: #0d6efd;
        }
        .btn-primary:hover, .btn-primary:focus, .btn-primary:active {
            background-color: #0b5ed7;
            border-color: #0a58ca;
        }
        .custom-file-button input[type=file] {
            margin-left: -2px !important;
        }
        .custom-file-button input[type=file]::-webkit-file-upload-button {
            display: none;
        }
        .custom-file-button input[type=file]::file-selector-button {
            display: none;
        }
        .custom-file-button label {
            border-top-right-radius: 0;
            border-bottom-right-radius: 0;
        }
        .progress-bar {
            transition: width 0.3s ease;
        }
        .table-container {
            overflow-x: auto;
            max-height: 600px;
            overflow-y: auto;
        }
        .preview-table {
            max-height: 300px;
            overflow-y: auto;
        }
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: #fff;
            animation: spin 1s ease-in-out infinite;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        .column-selector {
            padding: 0.75rem;
            border: 1px solid #dee2e6;
            border-radius: 0.375rem;
            background-color: #f8f9fa;
            margin-bottom: 1rem;
            max-height: 300px;
            overflow-y: auto;
        }
        .column-item {
            display: flex;
            align-items: center;
            margin-bottom: 0.5rem;
            padding: 0.5rem;
            border: 1px solid #dee2e6;
            border-radius: 0.25rem;
            background-color: white;
        }
        .column-item:last-child {
            margin-bottom: 0;
        }
        .column-item.selected {
            background-color: #e9ecef;
        }
        .preview-badge {
            font-size: 0.8rem;
            padding: 0.2rem 0.5rem;
            border-radius: 0.25rem;
            background-color: #e9ecef;
            margin-bottom: 0.25rem;
            display: inline-block;
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .cell-content {
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .cell-content:hover {
            white-space: normal;
            word-break: break-word;
            max-height: none;
            position: relative;
            z-index: 1;
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            padding: 5px;
            border-radius: 3px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        .table-sm td {
            vertical-align: middle;
        }
        .sheet-tab {
            cursor: pointer;
            padding: 8px 15px;
            border: 1px solid #dee2e6;
            border-bottom: none;
            border-radius: 4px 4px 0 0;
            margin-right: 5px;
            background-color: #f8f9fa;
        }
        .sheet-tab.active {
            background-color: #fff;
            border-bottom: 1px solid #fff;
            margin-bottom: -1px;
            font-weight: bold;
        }
        .sheet-tabs-container {
            display: flex;
            border-bottom: 1px solid #dee2e6;
            margin-bottom: 15px;
        }
        .model-chip {
            display: inline-block;
            padding: 5px 10px;
            border-radius: 15px;
            background-color: #e9ecef;
            margin: 3px;
            cursor: pointer;
        }
        .model-chip.selected {
            background-color: #0d6efd;
            color: white;
        }
        .model-chip-container {
            margin-top: 10px;
            max-height: 120px;
            overflow-y: auto;
            padding: 5px;
            border: 1px solid #dee2e6;
            border-radius: 4px;
        }
        .api-link {
            text-decoration: none;
            color: #0d6efd;
            font-weight: bold;
        }
        .api-link:hover {
            text-decoration: underline;
        }
        .add-model-input {
            border-radius: 0 0 4px 4px;
            border-top: none;
        }
        #customModelInput {
            border-radius: 4px 0 0 4px;
        }
        .translation-options {
            margin-top: 1rem;
            padding: 1rem;
            border: 1px solid #dee2e6;
            border-radius: 0.375rem;
            background-color: #f8f9fa;
        }