<div class="button-list">
<button>Button</button>
<button class="reverse dark">Reverse</button>
<button class="fast white">Fast</button>
</div>

<!-- dribbble -->
<a class="dribbble" href="https://dribbble.com/shots/7441241-Button-Hover-Effects" target="_blank"><img src="https://cdn.dribbble.com/assets/dribbble-ball-mark-2bd45f09c2fb58dbbfb44766d5d1d07c5a12972d602ef8b32204d28fa3dda554.svg" alt=""></a>

button {
    &.dark {
        --background: #2F3545;
        --shadow: 0 2px 8px -1px #{rgba(#151924, .32)};
        --shadow-hover: 0 4px 20px -2px #{rgba(#151924, .5)};
    }
    &.white {
        --background: #fff;
        --text: #275efe;
        --shadow: 0 2px 8px -1px #{rgba(#121621, .04)};
        --shadow-hover: 0 4px 20px -2px #{rgba(#121621, .12)};
    }
    &.fast {
        --duration: .32s;
    }
}

button {
    --background: #275efe;
    --text: #fff;
    --font-size: 16px;
    --duration: .44s;
    --move-hover: -4px;
    --shadow: 0 2px 8px -1px #{rgba(#275efe, .32)};
    --shadow-hover: 0 4px 20px -2px #{rgba(#275efe, .5)};
    --font-shadow: var(--font-size);
    padding: 16px 32px;
    font-family: 'Roboto';
    font-weight: 500;
    line-height: var(--font-size);
    border-radius: 24px;
    display: block;
    outline: none;
    appearance: none;
    border: none;
    text-decoration: none;
    font-size: var(--font-size);
    letter-spacing: .5px;
    background: var(--background);
    color: var(--text);
    box-shadow: var(--shadow);
    transform: translateY(var(--y)) translateZ(0);
    transition: transform var(--duration) ease, box-shadow var(--duration) ease;
    div {
        display: flex;
        overflow: hidden;
        text-shadow: 0 var(--font-shadow) 0 var(--text);
        span {
            display: block;
            backface-visibility: hidden;
            font-style: normal;
            transition: transform var(--duration) ease;
            transform: translateY(var(--m)) translateZ(0);
            $i: 1;
            @while $i < 12 {
                &:nth-child(#{$i}) {
                    transition-delay: $i / 20 + s;
                }
                $i: $i + 1;
            }
        }
    }
    &:hover {
        --y: var(--move-hover);
        --shadow: var(--shadow-hover);
        span {
            --m: calc(var(--font-size) * -1);
        }
    }
    &.reverse {
        --font-shadow: calc(var(--font-size) * -1);
        &:hover {
            span {
                --m: calc(var(--font-size));
            }
        }
    }
}

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;
    background: #E4ECFA;
    .button-list {
        display: flex;
        button {
            margin: 0 12px;
        }
    }
    .dribbble {
        position: fixed;
        display: block;
        right: 20px;
        bottom: 20px;
        img {
            display: block;
            height: 28px;
        }
    }
}

document.querySelectorAll('button').forEach(button => button.innerHTML = '<div><span>' + button.textContent.trim().split('').join('</span><span>') + '</span></div>');