:root{
--white:#fff;
--color: #D31122;
--main-color:#A1051D;
}
.btn{
color: var(--white);
background: var(--color);
font-family:'Roboto Condensed', sans-serif;
font-size: 18px;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 1px;
padding: 8px 15px;
border-radius: 0;
border: none;
position: relative;
box-shadow: -4px -4px 0px var(--white);
z-index: 1;
transition: all 0.35s;
}
.btn:hover,
.btn:focus{
color: var(--white);
box-shadow: 4px 4px 0px var(--white), 10px 10px 0px var(--main-color);
}
.btn:before{
content: "";
background: var(--main-color);
width: 100%;
height: 100%;
position: absolute;
left: 0;
top: 0;
transition: 0.3s all;
z-index: -1;
}
.btn:hover:before{ width: 50%; }
@media only screen and (max-width: 767px){
.btn{ margin-bottom: 30px; }
}