File: buttons.css

md-button, .bt {
    -webkit-transition: all .3s cubic-bezier(.4, 0, .2, 1);
    transition: all .3s cubic-bezier(.4, 0, .2, 1);
    background-color: #2196F3;
    border: 1px transparent;
    border-radius: 2px;
    box-shadow: 0 2px 10px 0 rgba(0, 0, 0, .16), 0 2px 5px 0 rgba(0, 0, 0, .26);
    box-sizing: border-box;
    color: #FFF;
    cursor: pointer;
    display: inline-block;
    font-size: 16px;
    height: 100%;
    line-height: 1;
    margin: 4px;
    min-width: 88px;
    outline: 0;
    overflow: hidden;
    padding: 8px;
    text-align: center;
    vertical-align: middle
}
.bt-float {
    border-radius: 50%;
    height: 48px;
    min-width: 0;
    padding: 8px;
    width: 48px
}
.sh-0 {
    border: 1px solid #eee
}
.sh-1 {
    box-shadow: 0 2px 10px 0 rgba(0, 0, 0, .16), 0 2px 5px 0 rgba(0, 0, 0, .26)
}
md-button:hover, .bt:hover, .sh-2 {
    box-shadow: 0 6px 20px 0 rgba(0, 0, 0, .19), 0 8px 17px 0 rgba(0, 0, 0, .2)
}
md-button:active, .bt:active, .sh-3 {
    box-shadow: 0 17px 50px 0 rgba(0, 0, 0, .19), 0 12px 15px 0 rgba(0, 0, 0, .24)
}
.sh-4 {
    box-shadow: 0 25px 55px 0 rgba(0, 0, 0, .21), 0 16px 28px 0 rgba(0, 0, 0, .22)
}
.sh-5 {
    box-shadow: 0 40px 77px 0 rgba(0, 0, 0, .22), 0 27px 24px 0 rgba(0, 0, 0, .2)
}