/* Hamburger Menu */
.burger-menu {
    width: 50px;
    height: 34px;
    position: relative;
    margin: 0;
    transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transition: 0.5s ease-in-out;
    -webkit-transition: 0.5s ease-in-out;
    -moz-transition: 0.5s ease-in-out;
    -ms-transition: 0.5s ease-in-out;
    -o-transition: 0.5s ease-in-out;
    cursor: pointer;
}

.burger-menu span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transition: 0.25s ease-in-out;
    -webkit-transition: 0.25s ease-in-out;
    -moz-transition: 0.25s ease-in-out;
    -o-transition: 0.25s ease-in-out;
    -ms-transition: 0.25s ease-in-out;
}

.collapsed .burger-menu span:nth-child(1),
.collapsed .burger-menu span:nth-child(4) {
    width: 100%;
    left: 0;
}

.burger-menu span:nth-child(1),
.burger-menu span:nth-child(4) {
    width: 0%;
    left: 50%;
}

.collapsed .burger-menu span:nth-child(1) {
    top: 0;
}

.burger-menu span:nth-child(1),
.burger-menu span:nth-child(2),
.burger-menu span:nth-child(3),
.burger-menu span:nth-child(4) {
    top: 13px;
}

.collapsed .burger-menu span:nth-child(4) {
    top: 26px;
}

.collapsed .burger-menu span:nth-child(2),
.collapsed .burger-menu span:nth-child(3) {
    transform: rotate(0);
    -webkit-transform: rotate(0);
    -moz-transform: rotate(0);
    -o-transform: rotate(0);
    -ms-transform: rotate(0);
}

.burger-menu span:nth-child(2) {
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
}

.burger-menu span:nth-child(3) {
    transform: rotate(-45deg);
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
}