.panel-default>.panel-heading {
    color: #333;
    background-color: #ffffff;
    border-color: #ffffff; 
}
.panel {
    margin-bottom: 20px;
    background-color: #ffffff;
    border: 1px solid transparent;
    border-radius: 4px;
   webkit-box-shadow: 0 1px 1px rgba(0,0,0,.00);
   box-shadow: 0 1px 1px rgba(0,0,0,.00);
}