Remova CSS sublinhado
a:hover {
text-decoration: none;
}
Dangerous Dormouse
a:hover {
text-decoration: none;
}span:hover {
text-decoration: none !important;
display: inline-block;
}a {
background-color: red;
color: white;
padding: 1em 1.5em;
text-decoration: none;
text-transform: uppercase;
}