body {
background: url(wp-content/uploads/2021/03/bg.jpeg) no-repeat center center fixed; 
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;

}

.mailto {
font-family: 'Arial';
width: 200px;
height: 20px;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
margin: auto;
-webkit-filter: blur(1px); /* Safari 6.0 - 9.0 */
filter: blur(1px);
}

.mailto:hover {
-webkit-filter: blur(0px); /* Safari 6.0 - 9.0 */
filter: blur(0px);
}