.button.dark-single {
    --background: none;
    --rectangle: #242836;
    --success: #4BC793;
}

.button.white-single {
    --background: none;
    --rectangle: #F5F9FF;
    --arrow: #275efe;
    --success: #275efe;
    --shadow: rgba(10, 22, 50, .1);
}

.button.dark {
    --background: #242836;
    --rectangle: #1C212E;
    --arrow: #F5F9FF;
    --text: #F5F9FF;
    --success: #2F3545;
}

.button {
    --background: #3a75ff;
    --rectangle: #184fee;
    --success: #4672f1;
    --text: #fff;
    --arrow: #fff;
    --checkmark: #fff;
    --shadow: rgba(10, 22, 50, .24);
    display: flex;
    overflow: hidden;
    text-decoration: none;
    -webkit-mask-image: -webkit-radial-gradient(white, black);
    background: var(--background);
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
    box-shadow: 0 2px 8px -1px var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
}

    .button:active {
        transform: scale(0.95);
        box-shadow: 0 1px 4px -1px var(--shadow);
    }

    .button ul {
        margin: 0;
        padding: 16px 40px;
        list-style: none;
        text-align: center;
        position: relative;
        -webkit-backface-visibility: hidden;
        backface-visibility: hidden;
        font-size: 16px;
        font-weight: 500;
        line-height: 28px;
        color: var(--text);
        width: 100%;
    }

        .button ul li:not(:first-child) {
            top: 16px;
            left: 0;
            right: 0;
            position: absolute;
        }

        .button ul li:nth-child(2) {
            top: 76px;
        }

        .button ul li:nth-child(3) {
            top: 136px;
        }

    .button > div {
        position: relative;
        width: 60px;
        height: 60px;
        background: var(--rectangle);
    }

        .button > div:before, .button > div:after {
            content: "";
            display: block;
            position: absolute;
        }

        .button > div::before {
            border-radius: 1px;
            top: 50%;
            left: 50%;
            margin: -10px 0 0 -9px;
            font-style: normal;
            font-variant: normal;
            text-rendering: auto;
            line-height: 1;
            /* content: "\f019"; */
            content: "\f33d";
            font-family: 'Font Awesome 5 Pro';
            font-weight: normal;
            color: white;
            font-size: 25px;
        }

        .button > div:after {
            width: 60px;
            height: 60px;
            transform-origin: 50% 0;
            border-radius: 0 0 80% 80%;
            background: #3a75ff;
            top: 0;
            left: 0;
            transform: scaleY(0);
        }

        .button > div svg {
            display: block;
            position: absolute;
            width: 20px;
            height: 20px;
            left: 50%;
            top: 50%;
            margin: -9px 0 0 -10px;
            fill: none;
            z-index: 1;
            stroke-width: 2px;
            stroke: var(--arrow);
            stroke-linecap: round;
            stroke-linejoin: round;
        }

    .button.loading ul {
        -webkit-animation: text calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
        animation: text calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
    }

    .button.loading > div:before {
        -webkit-animation: line calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
        animation: line calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
    }

    .button.loading > div:after {
        -webkit-animation: background calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
        animation: background calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
    }

    .button.loading > div svg {
        -webkit-animation: svg calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
        animation: svg calc(var(--duration) * 1ms) linear forwards calc(var(--duration) * .065ms);
    }

@-webkit-keyframes text {
    10%, 85% {
        transform: translateY(-100%);
    }

    95%, 100% {
        transform: translateY(-200%);
    }
}

@keyframes text {
    10%, 85% {
        transform: translateY(-100%);
    }

    95%, 100% {
        transform: translateY(-200%);
    }
}

@-webkit-keyframes line {
    5%, 10% {
        transform: translateY(-30px);
    }

    40% {
        transform: translateY(-20px);
    }

    65% {
        transform: translateY(0);
    }

    75%, 100% {
        transform: translateY(30px);
    }
}

@keyframes line {
    5%, 10% {
        transform: translateY(-30px);
    }

    40% {
        transform: translateY(-20px);
    }

    65% {
        transform: translateY(0);
    }

    75%, 100% {
        transform: translateY(30px);
    }
}

@-webkit-keyframes svg {
    0%, 20% {
        stroke-dasharray: 0;
        stroke-dashoffset: 0;
    }

    21%, 89% {
        stroke-dasharray: 26px;
        stroke-dashoffset: 26px;
        stroke-width: 3px;
        margin: -10px 0 0 -10px;
        stroke: var(--checkmark);
    }

    100% {
        stroke-dasharray: 26px;
        stroke-dashoffset: 0;
        margin: -10px 0 0 -10px;
        stroke: var(--checkmark);
    }

    12% {
        opacity: 1;
    }

    20%, 89% {
        opacity: 0;
    }

    90%, 100% {
        opacity: 1;
    }
}

@keyframes svg {
    0%, 20% {
        stroke-dasharray: 0;
        stroke-dashoffset: 0;
    }

    21%, 89% {
        stroke-dasharray: 26px;
        stroke-dashoffset: 26px;
        stroke-width: 3px;
        margin: -10px 0 0 -10px;
        stroke: var(--checkmark);
    }

    100% {
        stroke-dasharray: 26px;
        stroke-dashoffset: 0;
        margin: -10px 0 0 -10px;
        stroke: var(--checkmark);
    }

    12% {
        opacity: 1;
    }

    20%, 89% {
        opacity: 0;
    }

    90%, 100% {
        opacity: 1;
    }
}

@-webkit-keyframes background {
    10% {
        transform: scaleY(0);
    }

    40% {
        transform: scaleY(0.15);
    }

    65% {
        transform: scaleY(0.5);
        border-radius: 0 0 50% 50%;
    }

    75% {
        border-radius: 0 0 50% 50%;
    }

    90%, 100% {
        border-radius: 0;
    }

    75%, 100% {
        transform: scaleY(1);
    }
}

@keyframes background {
    10% {
        transform: scaleY(0);
    }

    40% {
        transform: scaleY(0.15);
    }

    65% {
        transform: scaleY(0.5);
        border-radius: 0 0 50% 50%;
    }

    75% {
        border-radius: 0 0 50% 50%;
    }

    90%, 100% {
        border-radius: 0;
    }

    75%, 100% {
        transform: scaleY(1);
    }
}

html {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

* {
    box-sizing: inherit;
}

    *:before, *:after {
        box-sizing: inherit;
    }

body .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

    body .container > div {
        flex-basis: 100%;
        width: 0;
    }

    body .container .button {
        margin: 16px;
    }

@media (max-width: 400px) {
    body .container .button {
        margin: 12px;
    }
}