<button class="button">
    <span>Submit</span>
    <svg viewBox="0 0 15 13">
        <polyline points="2 6.5 6 10.5 13 2.5"></polyline>
    </svg>
</button>

<a href="" class="restart">
    <svg viewBox="0 0 16 16" fill="currentColor">
        <path d="M4.5,4.5c1.9-1.9,5.1-1.9,7,0c0.7,0.7,1.2,1.7,1.4,2.7l2-0.3C14.7,5.4,14,4.1,13,3.1c-2.7-2.7-7.1-2.7-9.9,0 L0.9,0.9L0.2,7.3l6.4-0.7L4.5,4.5z"></path>
        <path d="M15.8,8.7L9.4,9.4l2.1,2.1c-1.9,1.9-5.1,1.9-7,0c-0.7-0.7-1.2-1.7-1.4-2.7l-2,0.3 C1.3,10.6,2,11.9,3,12.9c1.4,1.4,3.1,2,4.9,2c1.8,0,3.6-0.7,4.9-2l2.2,2.2L15.8,8.7z"></path>
    </svg>
    Restart
</a>

<!-- dribbble - twitter -->
<a class="dribbble" href="https://dribbble.com/shots/9437644-Processing-button" 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>

.button {
    --color: #fff;
    --background: #6D58FF;
    --height: 41px;
    --width: 160px;
    --icon: #fff;
    padding: 0;
    cursor: pointer;
    text-align: center;
    position: relative;
    border: none;
    outline: none;
    background: none;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
    width: var(--width);
    letter-spacing: .5px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color);
    line-height: var(--height);
    &:before,
    &:after {
        content: '';
        display: block;
        position: absolute;
        top: 50%;
        left: 50%;
    }
    &:before {
        transform: translate(-50%, -50%);
        width: var(--before-w, var(--width));
        height: var(--before-h, var(--height));
        border-radius: var(--before-r, 7px);
        background: var(--background);
        transform-origin: 50% 50%;
        transition: width .3s, height .3s, border-radius .2s;
        transition-delay: .2s;
    }
    &:after {
        width: 16px;
        height: 16px;
        margin: -8px 0 0 -8px;
        background: var(--icon);
        z-index: 2;
        border-radius: 50%;
        transform: scale(0);
    }
    span {
        z-index: 1;
        display: block;
        position: relative;
        opacity: var(--span-o, 1);
        transform: scale(var(--span-s, 1));
        transition: opacity .3s, transform .2s;
        transition-delay: .2s;
    }
    svg {
        width: 15px;
        height: 13px;
        display: block;
        position: absolute;
        left: 50%;
        top: 50%;
        stroke: var(--icon);
        stroke-width: 2px;
        stroke-linecap: round;
        stroke-linejoin: round;
        fill: none;
        transform: translate(-50%, -50%);
        stroke-dasharray: 17px;
        stroke-dashoffset: var(--svg-o, 17px);
        transition: stroke-dashoffset .3s ease;
    }
    &.processing {
        --before-w: 41px;
        --before-h: 41px;
        --before-r: 22px;
        --span-o: 0;
        --span-s: .6;
        --after-s: 1;
        --svg-o: 34px;
        &:before {
            animation: pulse 3s linear forwards;
        }
        &:after {
            animation: dot 3s linear forwards;
        }
        svg {
            transition-delay: 3s;
        }
    }
}

@keyframes pulse {
    4% {
        transform: translate(-50%, -50%) scaleX(1.1);
    }
    8% {
        transform: translate(-50%, -50%);
    }
    24%,
    56%,
    88% {
        transform: translate(-50%, -50%) scale(.8);
    }
    40%,
    72% {
        transform: translate(-50%, -50%) scale(1.2);
    }
}

@keyframes dot {
    8% {
        transform: scale(0);
    }
    16% {
        transform: scale(1) rotate(30deg) translateX(48px);
    }
    95% {
        transform: scale(1) rotate(1000deg) translateX(48px);
    }
    100% {
        transform: scale(.125) rotate(1050deg) translate(52px, -6px);
    }
}

.restart {
    display: table;
    position: absolute;
    bottom: 4%;
    left: 50%;
    transform: translateX(-50%);
    text-decoration: none;
    line-height: 23px;
    color: #404660;
    font-size: 14px;
    font-weight: 500;
    svg {
        margin: 4px 4px 0 0;
        width: 16px;
        height: 16px;
        display: inline-block;
        vertical-align: top;
    }
}

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: #0D0F18;
    .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;
        }
    }
}

// Some weird issues on mobile & safari - damn .. any ideas?

document.querySelectorAll('.button').forEach(button => {
    button.addEventListener('click', e => {
        button.classList.add('processing');
        e.preventDefault();
    });
});

document.querySelector('.restart').addEventListener('click', e => {
    document.querySelectorAll('.button').forEach(button => {
        button.classList.remove('processing');
    });
    e.preventDefault();
});