Buton 14

.btn-16 {
width: 130px;
height: 40px;
border-radius: 5px;
padding: 10px 25px;
background: transparent;
cursor: pointer;
transition: all 0.3s ease;
position: relative;
display: inline-block;
box-shadow:inset 2px 2px 2px 0px rgba(255,255,255,.5),
7px 7px 20px 0px rgba(0,0,0,.1),
4px 4px 5px 0px rgba(0,0,0,.1);
outline: none;
border: none;
color: #000;
}
.btn-16:after {
position: absolute;
content: "";
width: 0;
height: 100%;
top: 0;
left: 0;
direction: rtl;
z-index: -1;
box-shadow:
-7px -7px 20px 0px #fff9,
-4px -4px 5px 0px #fff9,
7px 7px 20px 0px #0002,
4px 4px 5px 0px #0001;
transition: all 0.3s ease;
}
.btn-16:hover {
color: #000;
}
.btn-16:hover:after {
left: auto;
right: 0;
width: 100%;
}
.btn-16:active {
top: 2px;
}