/* Excel Column Filler Styles */
    body.excel-filler-page.body-scroll {
        background: #f5f7f9 !important;
        margin: 0 !important;
        padding: 0 !important;
        min-height: 100vh !important;
    }
    
    body.excel-filler-page.body-scroll .excel-filler-frontend {
        padding: 40px 20px;
        min-height: 100vh;
        box-sizing: border-box;
    }
    
    body.excel-filler-page.body-scroll .excel-filler-container {
        max-width: 800px;
        margin: 0 auto;
        padding: 20px;
        background: #fff;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    /* Card Styles */
    .excel-filler-card {
        background: #fff;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        margin-bottom: 20px;
    }
    
    .card-header {
        padding: 15px 20px;
        border-bottom: 1px solid #eee;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    
    .card-header h2 {
        margin: 0;
        font-size: 18px;
        color: #333;
    }
    
    .card-body {
        padding: 20px;
    }
    
    /* Column Selector */
    .column-selector {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin: 15px 0;
    }
    
    .column-checkbox {
        position: relative;
    }
    
    .column-checkbox input {
        position: absolute;
        opacity: 0;
    }
    
    .column-label {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border: 2px solid #ddd;
        border-radius: 6px;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    
    .column-checkbox input:checked + .column-label {
        background: #0073aa;
        border-color: #0073aa;
        color: #fff;
    }