.main-header 
{
    display: flex;
    justify-content:space-between;
    background-color: #eff6fb;
    border-bottom: 10px solid #000;
    padding-left: 20px;
    padding-left: 20px;
    padding-top: 10px;
    padding-bottom: 10px;
}

.avatar 
{
    height: auto; 
    width: auto; 
    max-width: 60px; 
    max-height: 60px;
    overflow:hidden;
    border-radius: 80%;
}