<button class="button dark">
    <div class="hand">
        <div class="thumb"></div>
    </div>
    <span>Like<span>d</span></span>
</button>

<button class="button">
    <div class="hand">
        <div class="thumb"></div>
    </div>
    <span>Like<span>d</span></span>
</button>

<!-- dribbble - twitter -->
<a class="dribbble" href="https://dribbble.com/ai" target="_blank"><img src="https://cdn.dribbble.com/assets/dribbble-ball-mark-2bd45f09c2fb58dbbfb44766d5d1d07c5a12972d602ef8b32204d28fa3dda554.svg" alt=""></a>
<a class="twitter" target="_top" 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>

.button {
    --color: #1E2235;
    --color-hover: #1E2235;
    --color-active: #fff;
    --icon: #BBC1E1;
    --icon-hover: #8A91B4;
    --icon-active: #fff;
    --background: #fff;
    --background-hover: #fff;
    --background-active: #362A89;
    --border: #E1E6F9;
    --border-active: #362A89;
    --shadow: #{rgba(#001177, .025)};
    display: block;
    outline: none;
    cursor: pointer;
    position: relative;
    border: 0;
    background: none;
    padding: 8px 20px 8px 24px;
    border-radius: 9px;
    line-height: 27px;
    font-family: inherit;
    font-weight: 600;
    font-size: 14px;
    color: var(--color);
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
    transition: color .2s linear;
    &.dark {
        --color: #F6F8FF;
        --color-hover: #F6F8FF;
        --color-active: #fff;
        --icon: #8A91B4;
        --icon-hover: #BBC1E1;
        --icon-active: #fff;
        --background: #1E2235;
        --background-hover: #171827;
        --background-active: #275EFE;
        --border: transparent;
        --border-active: transparent;
        --shadow: #{rgba(#001177, .16)};
    }
    &:hover {
        --icon: var(--icon-hover);
        --color: var(--color-hover);
        --background: var(--background-hover);
        --border-width: 2px;
    }
    &:active {
        --scale: .95;
    }
    &:not(.liked) {
        &:hover {
            --hand-rotate: 8;
            --hand-thumb-1: -12deg;
            --hand-thumb-2: 36deg;
        }
    }
    &.liked {
        --span-x: 2px;
        --span-d-o: 1;
        --span-d-x: 0;
        --icon: var(--icon-active);
        --color: var(--color-active);
        --border: var(--border-active);
        --background: var(--background-active);
    }
    &:before {
        content: '';
        min-width: 103px;
        position: absolute;
        left: 0;
        top: 0;
        right: 0;
        bottom: 0;
        border-radius: inherit;
        transition: background .2s linear, transform .2s, box-shadow .2s linear;
        transform: scale(var(--scale, 1)) translateZ(0);
        background: var(--background);
        box-shadow: inset 0 0 0 var(--border-width, 1px) var(--border), 0 4px 8px var(--shadow), 0 8px 20px var(--shadow);
    }
    .hand {
        width: 11px;
        height: 11px;
        border-radius: 2px 0 0 0;
        background: var(--icon);
        position: relative;
        margin: 10px 8px 0 0;
        transform-origin: -5px -1px;
        transition: transform .25s, background .2s linear;
        transform: rotate(calc(var(--hand-rotate, 0) * 1deg)) translateZ(0);
        &:before,
        &:after {
            content: '';
            background: var(--icon);
            position: absolute;
            transition: background .2s linear, box-shadow .2s linear;
        }
        &:before {
            left: -5px;
            bottom: 0;
            height: 12px;
            width: 4px;
            border-radius: 1px 1px 0 1px;
        }
        &:after {
            right: -3px;
            top: 0;
            width: 4px;
            height: 4px;
            border-radius: 0 2px 2px 0;
            background: var(--icon);
            box-shadow: -.5px 4px 0 var(--icon), -1px 8px 0 var(--icon), -1.5px 12px 0 var(--icon);
            transform: scaleY(.6825);
            transform-origin: 0 0;
        }
        .thumb {
            background: var(--icon);
            width: 10px;
            height: 4px;
            border-radius: 2px;
            transform-origin: 2px 2px;
            position: absolute;
            left: 0;
            top: 0;
            transition: transform .25s, background .2s linear;
            transform: scale(.85) translateY(-.5px) rotate(var(--hand-thumb-1, -45deg)) translateZ(0);
            &:before {
                content: '';
                height: 4px;
                width: 7px;
                border-radius: 2px;
                transform-origin: 2px 2px;
                background: var(--icon);
                position: absolute;
                left: 7px;
                top: 0;
                transition: transform .25s, background .2s linear;
                transform: rotate(var(--hand-thumb-2, -45deg)) translateZ(0);
            }
        }
    }
    .hand,
    span {
        display: inline-block;
        vertical-align: top;
        span {
            opacity: var(--span-d-o, 0);
            transition: transform .25s, opacity .2s linear;
            transform: translateX(var(--span-d-x, 4px)) translateZ(0);
        }
    }
    & > span {
        transition: transform .25s;
        transform: translateX(var(--span-x, 4px)) translateZ(0);
    }
}

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: 'Inter', Arial;
    justify-content: center;
    align-items: center;
    background: #F6F8FF;
    .button {
        margin: 0 12px;
    }
    .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;
        }
    }
}

document.querySelectorAll('.button').forEach(button => {

    button.addEventListener('click', e => {
        button.classList.toggle('liked');
        if(button.classList.contains('liked')) {
            gsap.fromTo(button, {
                '--hand-rotate': 8
            }, {
                ease: 'none',
                keyframes: [{
                    '--hand-rotate': -45,
                    duration: .16,
                    ease: 'none'
                }, {
                    '--hand-rotate': 15,
                    duration: .12,
                    ease: 'none'
                }, {
                    '--hand-rotate': 0,
                    duration: .2,
                    ease: 'none',
                    clearProps: true
                }]
            });
        }
    })

});