.conblock_div{
    text-align: center;
    border: 4px double #c5c5c5;
    padding: 5px;
}

.conblock_div [placeholder]{
    text-align: center;    
}

.conblock_div input[type="submit"]{
    border:1px solid #c5c5c5;
    margin-top: 5px;     
}

.conblock_icon {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px;
}