table { border-collapse: collapse; margin: auto; }
    td { width: 55px; height: 30px; border: 1px solid #ccc; text-align: center; vertical-align: middle; cursor: pointer; font-size: 12px; }
    .empty { background: white; }
    table { 
        border-collapse: collapse; 
        margin: auto; 
    }
    
    td { 
        width: 55px; 
        height: 30px; 
        border: 1px solid #ccc; 
        text-align: center; 
        vertical-align: middle; 
        cursor: pointer; 
        font-size: 12px; 
    }
    
    .empty { 
        background: white; 
    }