html, body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
}

body {
    font-family: 'Montserrat', Helvetica, sans-serif;
    display: table-cell;
    vertical-align: middle;
    horizontal-align: middle;
}

.center {
display: flex;
justify-content: center;
}

.example_b {
color: #fff !important;
text-transform: uppercase;
text-decoration: none;
background: #03375C;
padding: 20px;
border-radius: 50px;
display: inline-block;
border: none;
transition: all 0.4s ease 0s;
}

.example_b:hover {
text-shadow: 0px 0px 6px rgba(255, 255, 255, 1);
-webkit-box-shadow: 0px 5px 40px -10px rgba(0,0,0,0.57);
-moz-box-shadow: 0px 5px 40px -10px rgba(0,0,0,0.57);
transition: all 0.4s ease 0s;
}