a.btn.btn-tertiary{
padding: 16px 28px;    border-radius: 0;    background-color:#5AA1D1;    border: none;   box-shadow: 0 4px 5px -3px #333;    transition: 0.5s;    font-weight: bold;transition: ease-out 0.4s; color:white;
}

a.btn.btn-tertiary:hover{
box-shadow: inset 0 0 0 50px #4F8EB8;
color:white;
}