基本ボタン

<div class="btnlink">
<a href="#">button</a>
</div>

/* btn link */
.btnlink{
display:block;
width:280px;
margin:40px auto;
padding:6px;
font-size:18px;
text-align:center;
}

.btnlink a{
display:block;
font-size:16px;
text-align:center;
padding:6px;
color:#ffffff;
text-decoration:none;
background:#1e90ff;
border-radius:4px;
box-shadow:0 3px 0 #191970;
}

.btnlink a:hover{
display:block;
text-align:center;
vertical-align:middle;
color:#ffffff;
text-decoration:none;
background:#ff0c09;
border-radius:4px;
box-shadow:0 3px 0 #000000;
}