.close-icon {
    min-width:30px;
    min-height:24px; 
    background: url(/images/close-icon.png) center  no-repeat;
    background-size: 20px 20px;
    border-radius:5px;
    padding-left:30px;
    margin:3px 5px;
    border-left:1px solid #ddd;
    border-right:1px solid #ddd;
    background-color:#fff;
} 

.close-icon:hover{
    background-color:#ddd;
}

.ok-icon, form button, dialog button:first-of-type{
    padding-left: 24px;
    min-height: 24px;
    min-width: 24px;
    display: inline-block;
    border-radius: 8px;
    background-image: url(/images/ok-icon.png);
    background-position: 2px center;
    background-repeat: no-repeat;
    background-size: 20px 20px; 
    cursor: pointer;
}