.property-table th,
        .property-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .input-group-custom {
            margin-bottom: 1rem;
        }
        .deep-dive {
            margin: 1.8rem 0;
        }
        .deep-dive p {
            text-align: justify;
        }
        .unit-note {
            font-size: 0.9rem;
            color: #6c757d;
        }
        .coord-input {
            margin-bottom: 0.5rem;
        }
        .drop-zone {
            border: 2px dashed #ccc;
            border-radius: 12px;
            padding: 2.5rem 1rem;
            text-align: center;
            background-color: #fafbfc;
            transition: all 0.25s ease;
            cursor: pointer;
        }
        .drop-zone:hover,
        .drop-zone.dragover {
            border-color: var(--primary-color);
            background-color: rgba(70, 130, 180, 0.04);
        }
        .drop-zone .fa-upload {
            font-size: 3rem;
            color: #aaa;
            margin-bottom: 0.5rem;
        }
        .file-info {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background-color: #f0f4f9;
            border-radius: 8px;
            padding: 0.75rem 1.25rem;
            margin-top: 0.75rem;
        }
        .file-info .file-name {
            font-weight: 500;
            word-break: break-all;
        }
        .file-info .file-size {
            color: #6c757d;
            font-size: 0.85rem;
            margin-left: auto;
        }
        .json-preview {
            background: #1e1e2e;
            color: #cdd6f4;
            border-radius: 8px;
            padding: 1.25rem;
            max-height: 420px;
            overflow-y: auto;
            font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
            font-size: 0.85rem;
            line-height: 1.5;
            white-space: pre-wrap;
            word-break: break-all;
            position: relative;
        }
        .json-preview .json-line-numbers {
            user-select: none;
            color: #6c7086;
            padding-right: 1rem;
            border-right: 1px solid #313244;
            margin-right: 1rem;
            display: inline-block;
            text-align: right;
            min-width: 2rem;
        }
        .json-preview .json-content {
            display: inline-block;
        }
        .json-actions {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin: 0.75rem 0;
        }
        .sheet-selector {
            max-width: 300px;
        }
        .stats-badge {
            display: inline-block;
            background: #e9ecef;
            border-radius: 20px;
            padding: 0.25rem 0.9rem;
            font-size: 0.8rem;
            color: #495057;
        }
        .stats-badge i {
            margin-right: 0.3rem;
        }
        .result-container-json {
            margin-top: 1.5rem;
        }
        .preview-placeholder {
            color: #6c757d;
            padding: 2rem 0;
            text-align: center;
        }
        .preview-placeholder i {
            font-size: 2.5rem;
            opacity: 0.3;
            display: block;
            margin-bottom: 0.5rem;
        }
        .config-check {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .config-check label {
            margin-bottom: 0;
            font-weight: 400;
            cursor: pointer;
        }
        .option-group {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 1rem 1.25rem;
            margin: 0.75rem 0;
        }
        .option-group .form-check {
            margin-bottom: 0.25rem;
        }
        .option-group .form-check:last-child {
            margin-bottom: 0;
        }
        .badge-json {
            background: #2d2d44;
            color: #cdd6f4;
            font-family: monospace;
            font-size: 0.7rem;
            letter-spacing: 0.3px;
        }
        .example-data-hint {
            font-size: 0.9rem;
            color: #6c757d;
            margin-top: 0.5rem;
        }
        .example-data-hint .example-tag {
            display: inline-block;
            background: #e9ecef;
            padding: 0.15rem 0.6rem;
            border-radius: 12px;
            font-size: 0.75rem;
            margin: 0.15rem 0.2rem;
            cursor: pointer;
            transition: background 0.2s;
            font-family: monospace;
        }
        .example-data-hint .example-tag:hover {
            background: #d0d7de;
        }
        @media (max-width: 576px) {
            .drop-zone {
                padding: 1.5rem 0.5rem;
            }
            .drop-zone .fa-upload {
                font-size: 2rem;
            }
            .json-preview {
                font-size: 0.7rem;
                padding: 0.75rem;
                max-height: 280px;
            }
        }