In order to get a simple button with a hover effect simply use the following script
<center
style="
background-color:#f7f7f7;
width: 100%;
padding: 30px;">
<button
onclick="
amazd.show();amazd.toggle()"
onMouseOver="
this.style.background='black';
this.style.color='white'"
onMouseOut="
this.style.background='#f7f7f7';
this.style.color='black'"
style="
cursor: pointer;
background: #f7f7f7;
color: #000000;
border: solid;
border-radius: 0px;
border-color:#000000;
font-family:CeraPro;
font-size:14px;">
<b>GET IN TOUCH</b>
</button>
</center>