a.button3{
display:inline-block;
padding:0.3em 1.2em;
margin:0 0.3em 0.3em 0;
border-radius:2em;
box-sizing: border-box;
text-decoration:none;
font-family:'Roboto',sans-serif;
font-weight:300;
font-size: 30px; 
color:#FFFFFF;
background-color: #006FBA; /* Light Blue = #006FBA; Dark Blue = #212492; Light Green = #69BE28; Dark Green = #00693B */
text-align:center;
transition: all 0.2s;
width: 400px;
}
a.button3:hover{
background-color: #00693B; /* Light Blue = #006FBA; Dark Blue =#212492; Light Green = #69BE28; Dark Green = #00693B */
}
@media all and (max-width:30em){
a.button3{
display:block;
margin:0.2em auto;
}
}