HTMLify

@import url("https://fonts.googleapis.com/css2?family=Montserrat&display=swap");

* {
    box-sizing: border-box;
}

body {
    width: 100%;
    height: 100vh;
    display: grid;
    place-items: center;
    background-color: #151515;
    background-image: linear-gradient(to top, #84a0f4 0%, #c2e9fb 100%);
    font-family: "Montserrat", sans-serif;
}

.list-container {
    position: relative;
}

.menu-button {
    color: #fff;
    background-color: #5c67ff;
    box-shadow: 0px 0px 0px 4px rgba(92, 103, 255, 0.3);
    border: none;
    border-radius: 50%;

    width: 50px;
    height: 50px;
    padding: 0;
    cursor: pointer;
    transition: 0.2s ease-in;

    display: grid;
    place-items: center;
    position: relative;
    z-index: 2;
}

.menu-button:hover,
.menu-button:focus {
    box-shadow: 0px 0px 0px 8px rgba(92, 103, 255, 0.3);
    background-color: #4854ff;
}

.menu-button:focus {
    outline: 0;
}

.menu-icon-wrapper {
    border-radius: 2px;
    width: 20px;
    height: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    transition: transform 330ms ease-out;
}

.menu-icon-line {
    background-color: #fff;
    border-radius: 2px;
    width: 100%;
    height: 2px;
}

.menu-icon-line.half {
    width: 50%;
}

.menu-icon-line.first {
    transition: transform 300ms cubic-bezier(0.52, -0.8, 0.52, 0.52);
    transform-origin: right;
}

.menu-icon-line.last {
    align-self: flex-end;
    transition: transform 300ms cubic-bezier(0.52, -0.8, 0.52, 0.52);
    transform-origin: left;
}

.list-container.active .menu-button-list {
    opacity: 1;
    transform: scale(1);
}

.list-container.active .menu-button-list-item {
    animation: fadeInItem 0.6s 0.2s forwards;
}

.list-container.active .menu-button-list-item:nth-child(2) {
    animation-delay: 0.4s;
}

.list-container.active .menu-button-list-item:nth-child(3) {
    animation-delay: 0.6s;
}

.list-container.active .menu-button-list-item:nth-child(4) {
    animation-delay: 0.8s;
}

.list-container.active .menu-button {
    animation: onePulse 0.6s forwards linear;
}

.list-container.active .menu-icon-wrapper {
    transform: rotate(-45deg);
}

.list-container.active .menu-icon-line.first {
    transform: rotate(-90deg) translateX(1px);
}

.list-container.active .menu-icon-line.last {
    transform: rotate(-90deg) translateX(-1px);
}

.menu-button-list {
    background-color: #fff;
    border-radius: 8px;
    list-style-type: none;
    width: 140px;
    height: 170px;
    box-shadow: 0px 0px 4px 4px rgba(150, 157, 249, 0.16);
    padding: 6px;
    position: absolute;
    right: 24px;
    bottom: 0;
    opacity: 0;
    transform: scale(0);
    transform-origin: bottom right;
    transition: all 0.3s ease 0.1s;
}

.menu-button-list li {
    opacity: 0;
}

.menu-button-list-item {
    display: flex;
    align-items: center;
    color: #1c3991;
    padding: 10px;
    border-radius: 4px;
    cursor: pointer;
    position: relative;
    transition: 0.2s ease-in;
    transform: translateX(-10px);
}

.menu-button-list-item:hover {
    color: #5c67ff;
}

.menu-button-list-item:after {
    content: "";
    position: absolute;
    height: 1px;
    width: calc(100% - 24px);
    left: 12px;
    bottom: 0;
    background-color: rgba(132, 160, 244, 0.1);
}

.menu-button-list-item:last-child:after {
    display: none;
}

.menu-button-list-item svg {
    width: 18px;
    height: 18px;
}

.menu-button-list-item span {
    display: inline-block;
    line-height: 20px;
    font-size: 14px;
    margin-left: 8px;
}

@keyframes onePulse {
    0% {
        box-shadow: 0px 0px 0px 0px rgba(92, 103, 255, 0.3);
    }

    50% {
        box-shadow: 0px 0px 0px 12px rgba(92, 103, 255, 0.1);
    }

    100% {
        box-shadow: 0px 0px 0px 4px rgba(92, 103, 255, 0.3);
    }
}

@keyframes fadeInItem {
    100% {
        transform: translatex(0px);
        opacity: 1;
    }
}