HTMLify

html,
body {
    margin: 0;
    padding: 0;
}

body {
    height: 100vh;
    display: grid;
    place-items: center;
    background-color: #121314;
}

.hamburger {
    display: flex;
    align-self: center;
    justify-content: space-between;
    flex-direction: column;
    width: 100px;
    height: 60px;
    cursor: pointer;
}

.hamburger div {
    align-self: flex-end;
    height: 4px;
    width: 100%;
    background: #fff;
}

.hamburger .center {
    width: 75%;
    transition: all 200ms ease-in-out;
}

.hamburger .bottom {
    width: 50%;
    transition: all 400ms ease-in-out;
}

.hamburger:hover div {
    width: 100%;
}

.hamburger:hover .top {
    animation: burger-hover 1s infinite ease-in-out alternate;
}

.hamburger:hover .center {
    animation: burger-hover 1s infinite ease-in-out alternate forwards 200ms;
}

.hamburger:hover .bottom {
    animation: burger-hover 1s infinite ease-in-out alternate forwards 400ms;
}

@keyframes burger-hover {
    0% {
        width: 100%;
    }

    50% {
        width: 50%;
    }

    100% {
        width: 100%;
    }
}