.css-btn {
    /* Darker gray at the top (0%), fading to pure white at the bottom (100%) */
     background: linear-gradient(to bottom, #e8e8e8 0%, #ffffff 100%);
    
    border: 1px solid #666666;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box; 
    height: 31px; 
    padding: 0 18px; 
    color: #40609a !important;
    
    font-family: Arial, sans-serif;
    font-size: 16px;
    font-weight: normal;
    
    text-decoration: none;
    user-select: none;
    cursor: pointer;
}