Ciao scartus,
.btn-circled:hover::before, .btn-circled:hover::after, .btn-circled:focus::before, .btn-circled:focus::after {
opacity: 1;
transform: translateX(-50%) translateY(-50%) scale(1);
}
.btn-circled::before, .btn-circled::after {
border: 2px solid rgba(0, 0, 0, 0.1);
border-radius: 50%;
content: "";
height: 100px;
left: 50%;
opacity: 0;
position: absolute;
top: 50%;
transform: translateX(-50%) translateY(-50%) scale(0.2);
transition: transform 0.3s ease 0s, opacity 0.3s ease 0s;
width: 100px;
}
.btn-circled:hover::before, .btn-circled:hover::after, .btn-circled:focus::before, .btn-circled:focus::after {
opacity: 1;
transform: translateX(-50%) translateY(-50%) scale(1);
}
.btn-circled::after {
border-width: 6px;
height: 90px;
transform: translateX(-50%) translateY(-50%) scale(0.8);
width: 90px;
}
.btn-circled::before, .btn-circled::after {
border: 2px solid rgba(0, 0, 0, 0.1);
border-radius: 50%;
content: "";
height: 100px;
left: 50%;
opacity: 0;
position: absolute;
top: 50%;
transform: translateX(-50%) translateY(-50%) scale(0.2);
transition: transform 0.3s ease 0s, opacity 0.3s ease 0s;
width: 100px;
}
.btn-circled {
display: inline-block;
position: relative;
text-decoration: none;
text-shadow: 0 0 1px rgba(255, 255, 255, 0.3);
}
Copia questo CSS ed aggiungi la classe btn-circled nei tuoi link, oppure adattalo come meglio credi.