button.btn-lnr{
    display: inline-block;
    position: relative;
    background: none;
    border: none;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    margin: 20px 30px;
    transition: all 0.2s linear;
    background: #f4940a;
}button.btn-lnr:hover{
     background: #d3750a;
    color: black;
     font-weight: bolder;

 }
span.btn-lnr{
    display: block;
    padding: 25px 40px;
}
button.btn-lnr::before, button.btn-lnr::after{
    content:"";
    width: 0;
    height: 2px;
    position: absolute;
    transition: all 0.2s linear;
    background: #fff;
}

span.btn-lnr::before, span.btn-lnr::after{
    content:"";
    width:2px;
    height:0;
    position: absolute;
    transition: all 0.2s linear;
    background: #fff;
}
button.btn-lnr:hover::before, button.btn-lnr:hover::after{
    width: 100%;
}
button.btn-lnr:hover span::before, button.btn-lnr:hover span.btn-lnr::after{
    height: 100%;
}
.btn-lnr-k::after{
    right:0;
    bottom: 0;
    transition-duration: 0.4s;
}
.btn-lnr-k span::after{
    right:0;
    bottom: 0;
    transition-duration: 0.4s;
}
.btn-lnr-k::before{
    left: 0;
    top: 0;
    transition-duration: 0.4s;
}
.btn-lnr-k span::before{
    left: 0;
    top: 0;
    transition-duration: 0.4s;
}