HTMLify

body {
    width: 100vw;
    height: 100vh;
    display: grid;
    background: #1e1e24;
    place-items: center;
    font-family: sans-serif;
}

input {
    display: none;
}

.button_inner {
    position: absolute;
    width: 200px;
    height: 50px;
    left: 0;
    right: 0;
    top: 50%;
    margin: auto;
    box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 0.04);
    font-size: 14px;
    cursor: pointer;
    border: 2px solid #ffffff;
    color: white;
    text-align: center;
    transition: all 0.3s, box-shadow 0.2s, transform 0.2s 0.2s;
}

.button_inner .button-text {
    position: relative;
    top: 6px;
    opacity: 1;
    left: -10px;
    transition: left 0.4s 0.1s;
}

.button_inner .button-icon {
    position: relative;
    left: -19px;
    top: 20px;
    color: #00c4ff;
    font-size: 25px;
    opacity: 0;
    transition: left 0.3s 0s, top 0.3s 0s, opacity 0.3s 0s;
}

.tick {
    position: absolute;
    left: 0;
    right: 0;
    transform: scale(0);
    margin: auto;
}

input:checked+label .button_inner {
    background: transparent;
    transform: rotate(90deg);
    width: 100px;
    border-radius: 100px;
    box-shadow: 0px 0px 0px 440px rgba(0, 0, 0, 0);
    animation: finalbox 0.4s 4.42s cubic-bezier(0.39, 2.01, 0.27, 0.75) forwards;
}

input:checked+label .button_inner .button-text {
    opacity: 0;
    top: 20px;
}

input:checked+label .button-icon {
    left: 14px;
    opacity: 1;
    top: 11px;
    animation: down 1s 0.25s infinite, final 0.2s 4s forwards;
}

input:checked+label .tick {
    position: absolute;
    left: 2px;
    right: 0;
    transform: scale(0) rotate(-90deg);
    color: #00c1fc;
    top: 11px;
    margin: auto;
    font-size: 22px;
    animation: tick 0.3s 4.7s forwards;
}

.button_inner:hover {
    color: #2c3940;
    background: white;
    box-shadow: 0px 17px 18px -14px rgba(0, 0, 0, 0.08);
}

.button_inner:hover .button-text {
    left: 0;
    transition: left 0.4s;
}

.button_inner:hover .button-icon {
    top: 12px;
    opacity: 1;
    transition: left 0.3s 0s, top 0.3s 0.1s, opacity 0.3s 0.1s;
}

@keyframes down {
    from {
        left: 10px;
    }

    to {
        left: 57px;
    }
}

@keyframes finalbox {
    to {
        width: 50px;
    }
}

@keyframes tick {
    to {
        transform: scale(1) rotate(-90deg);
    }
}

@keyframes final {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}