<label class="heart-switch">
    <input type="checkbox">
    <svg viewBox="0 0 33 23" fill="white">
        <path d="M23.5,0.5 C28.4705627,0.5 32.5,4.52943725 32.5,9.5 C32.5,16.9484448 21.46672,22.5 16.5,22.5 C11.53328,22.5 0.5,16.9484448 0.5,9.5 C0.5,4.52952206 4.52943725,0.5 9.5,0.5 C12.3277083,0.5 14.8508336,1.80407476 16.5007741,3.84362242 C18.1491664,1.80407476 20.6722917,0.5 23.5,0.5 Z"></path>
    </svg>
</label>

<label class="heart-switch">
    <input type="checkbox" checked>
    <svg viewBox="0 0 33 23" fill="white">
        <path d="M23.5,0.5 C28.4705627,0.5 32.5,4.52943725 32.5,9.5 C32.5,16.9484448 21.46672,22.5 16.5,22.5 C11.53328,22.5 0.5,16.9484448 0.5,9.5 C0.5,4.52952206 4.52943725,0.5 9.5,0.5 C12.3277083,0.5 14.8508336,1.80407476 16.5007741,3.84362242 C18.1491664,1.80407476 20.6722917,0.5 23.5,0.5 Z"></path>
    </svg>
</label>

<!-- dribbble - twitter -->
<a class="dribbble" href="https://dribbble.com/shots/9070657-Heart-Switch" target="_blank"><img src="https://cdn.dribbble.com/assets/dribbble-ball-mark-2bd45f09c2fb58dbbfb44766d5d1d07c5a12972d602ef8b32204d28fa3dda554.svg" alt=""></a>
<a class="twitter" target="_blank" href="https://twitter.com/aaroniker_me"><svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" viewBox="0 0 72 72"><path d="M67.812 16.141a26.246 26.246 0 0 1-7.519 2.06 13.134 13.134 0 0 0 5.756-7.244 26.127 26.127 0 0 1-8.313 3.176A13.075 13.075 0 0 0 48.182 10c-7.229 0-13.092 5.861-13.092 13.093 0 1.026.118 2.021.338 2.981-10.885-.548-20.528-5.757-26.987-13.679a13.048 13.048 0 0 0-1.771 6.581c0 4.542 2.312 8.551 5.824 10.898a13.048 13.048 0 0 1-5.93-1.638c-.002.055-.002.11-.002.162 0 6.345 4.513 11.638 10.504 12.84a13.177 13.177 0 0 1-3.449.457c-.846 0-1.667-.078-2.465-.231 1.667 5.2 6.499 8.986 12.23 9.09a26.276 26.276 0 0 1-16.26 5.606A26.21 26.21 0 0 1 4 55.976a37.036 37.036 0 0 0 20.067 5.882c24.083 0 37.251-19.949 37.251-37.249 0-.566-.014-1.134-.039-1.694a26.597 26.597 0 0 0 6.533-6.774z"></path></svg></a>

.heart-switch {
    --duration: .45s;
    --stroke: #D1D6EE;
    --stroke-active: #ec4472;
    --fill: #fff;
    --fill-active: #ec638e;
    --shadow: #{rgba(#00093D, .25)};
    cursor: pointer;
    position: relative;
    transform: scale(var(--s, 1)) translateZ(0);
    transition: transform .2s;
    -webkit-tap-highlight-color: transparent;
    &:active {
        --s: .95;
    }
    input {
        -webkit-appearance: none;
        -moz-appearance: none;
        position: absolute;
        outline: none;
        border: none;
        pointer-events: none;
        z-index: 1;
        margin: 0;
        padding: 0;
        left: 1px;
        top: 1px;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: #fff;
        box-shadow: 0 1px 3px 0 var(--shadow);
        & + svg {
            width: 36px;
            height: 25px;
            fill: var(--fill);
            stroke: var(--stroke);
            stroke-width: 1px;
            stroke-linejoin: round;
            display: block;
            transition: stroke var(--duration), fill var(--duration);
        }
        &:not(:checked) {
            animation: uncheck var(--duration) linear forwards;
        }
        &:checked {
            animation: check var(--duration) linear forwards;
            & + svg {
                --fill: var(--fill-active);
                --stroke: var(--stroke-active);
            }
        }
    }
}

@keyframes uncheck {
    0% {
        transform: rotate(-30deg) translateX(13.5px) translateY(8px);
    }
    50% {
        transform: rotate(30deg) translateX(9px);
    }
    75% {
        transform: rotate(30deg) translateX(4.5px) scaleX(1.1);
    }
    100% {
        transform: rotate(30deg);
    }
}

@keyframes check {
    0% {
        transform: rotate(30deg);
    }
    25% {
        transform: rotate(30deg) translateX(4.5px) scaleX(1.1);
    }
    50% {
        transform: rotate(30deg) translateX(9px);
    }
    100% {
        transform: rotate(-30deg) translateX(13.5px) translateY(8px);
    }
}

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

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

// Center & dribbble
body {
    min-height: 100vh;
    display: flex;
    font-family: 'Roboto', Arial;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: #F6F8FF;
    .heart-switch {
        margin: 12px 0;
    }
    .dribbble {
        position: fixed;
        display: block;
        right: 20px;
        bottom: 20px;
        img {
            display: block;
            height: 28px;
        }
    }
    .twitter {
        position: fixed;
        display: block;
        right: 64px;
        bottom: 14px;
        svg {
            width: 32px;
            height: 32px;
            fill: #1da1f2;
        }
    }
}