.c3-navigation-button {
    display: block;
    width: 40px;
    height: 40px;
    position: relative;
    z-index: 99999;
    padding: 0;
    border: 0;
    border-radius: 0;
}

.c3-navigation-button,
.c3-navigation-button:hover,
.c3-navigation-button:focus {
    background-color: transparent;
    outline: 0;
}

.c3-navigation-button__icon {
    display: block;
    width: 60%;
    height: 100%;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: transform 300ms;
    -webkit-transition: transform 300ms;
}

.c3-navigation-button__icon-line {
    display: block;
    width: 100%;
    height: 2px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 2px;
    background-color: var(--e-global-color-text);
    transition: top 300ms 300ms, transform 300ms 300ms;
}

.c3-navigation-button__icon-line:nth-child(1) {
    top: calc(50% - 6px);
}

.c3-navigation-button__icon-line:nth-child(2) {
    top: 50%;
}

.c3-navigation-button__icon-line:nth-child(3) {
    top: calc(50% + 6px);
}

.c3-navigation-button--clicked .c3-navigation-button__icon {
    transform: translate(-50%, -50%) rotate(45deg);
    transition: transform 300ms 300ms;
}

.c3-navigation-button--clicked .c3-navigation-button__icon-line:nth-child(1),
.c3-navigation-button--clicked .c3-navigation-button__icon-line:nth-child(3) {
    top: 50%;
    transition: top 300ms;
}

.c3-navigation-button--clicked .c3-navigation-button__icon-line:nth-child(2) {
    transform: translate(-50%, -50%) rotate(90deg);
    transition: transform 300ms 300ms;
}