:root{ --color: #1c6758; }
.btn{
color: var(--color);
font-family: 'Raleway', sans-serif;
font-size: 18px;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 1px;
padding: 8px 15px;
border-radius: 5px;
border: 1px solid var(--color);
overflow: hidden;
position: relative;
z-index: 1;
transition: all 0.35s;
}
.btn:hover,
.btn:focus{
color: #fff;
background: radial-gradient(circle,var(--color) 0.2em, transparent 0.3em) 6em 6em/1em 1em, radial-gradient(circle, var(--color) 0.2em, transparent 0.3em) 0 0/1em 1em;
transition-delay: 0.2s;
animation: ani500 0.6s forwards;
}
@keyframes ani500{
100% { background-size: 2.375em 2.375em, 0.1em 0.1em; }
}
@media only screen and (max-width: 767px){
.btn{ margin-bottom: 30px; }
}