.blue-button  {
background-color#216ad2;
color:#fff;
border-radius:5px;
padding:5px 15px;
border:solid 2px #fbff07;
box-shadow:10px 10px 2px #999;
width:120px;
}

.blue-button:hover{
background-color:#fcff07;
transition:all 0.4s ease-in-out 0s;
font-weight:bold;
}

.container-header {
background-color: red;
}