.btn {
    border: 0;
    border-bottom: 0;
    border-left: 0;
    box-shadow: inset 0 -3.2px rgba(0, 0, 0, 0.12), inset 2px 0 rgba(0, 0, 0, 0.1);
    outline: none;
    -webkit-outline: none;
    -o-outline: none;
    -moz-outline: none;
}
.btn:active, .btn.active {
    outline: none;
    -moz-outline: none;
    background-image: none;
    -webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125) !important;
    position: relative;
    box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125) !important;
    top: 1px;
    left: -1px;
}
.btn:focus {
    outline: none;
    -webkit-outline: none;
    -moz-outline: none;
}
.btn-sm {
    padding-top: 1.5px;
}