HTMLify

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

.hamburger {
    position: relative;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    user-select: none;
    padding: 12px;
    background-color: transparent;
    border: none;
    outline: none;
    transform: translateZ(0);
    transition: transform 0.1s ease-out;
}

.hamburger:active {
    transform: translateY(4px);
}

.line {
    display: block;
    width: 60px;
    padding: 3.75px;
}

.line::after {
    content: "";
    display: block;
    width: 100%;
    height: 7.5px;
    background-color: #fff;
    border-radius: 2px;
    transform: translateZ(0) rotate(0);
}

.open .line:nth-child(1) {
    animation: jump_1 0.9s forwards ease;
}

.open .line:nth-child(1):after {
    animation: line_1 0.9s forwards ease-in-out;
}

.open .line:nth-child(2) {
    animation: jump_2 0.9s forwards ease;
}

.open .line:nth-child(2):after {
    animation: line_2 0.9s forwards ease-in-out;
}

.close .line:nth-child(1) {
    animation: jump_1 0.9s reverse ease;
}

.close .line:nth-child(1):after {
    animation: line_1 0.9s reverse ease-in-out;
}

.close .line:nth-child(2) {
    animation: jump_2 0.9s reverse ease;
}

.close .line:nth-child(2):after {
    animation: line_2 0.9s reverse ease-in-out;
}

.open .line:nth-child(3),
.close .line:nth-child(3) {
    animation: jump_3 0.9s forwards ease-out;
}

@keyframes line_1 {
    10% {
        transform: translateZ(0) rotate(0);
    }

    80% {
        transform: translateZ(0) rotate(395deg);
    }

    90%,
    100% {
        transform: translateZ(0) rotate(405deg);
    }
}

@keyframes line_2 {
    10% {
        transform: translateZ(0) rotate(0);
    }

    20% {
        transform: translateZ(0) rotate(10deg);
    }

    90%,
    100% {
        transform: translateZ(0) rotate(-405deg);
    }
}

@keyframes jump_1 {
    10% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-90px);
    }

    90%,
    100% {
        transform: translateY(-7.5px);
    }
}

@keyframes jump_2 {
    10% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-75px);
    }

    85%,
    100% {
        transform: translateY(-22.5px);
    }
}

@keyframes jump_3 {
    10% {
        transform: translateY(-7.5px) rotate(15deg);
    }

    30% {
        transform: translateY(-30px) rotate(-10deg);
    }

    50% {
        transform: translateY(7.5px) rotate(5deg);
    }

    80% {
        transform: translateY(0);
    }
}