body{
    box-sizing: border-box;
    font-family: sans-serif;
    width:100vw;
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    overflow:hidden;
}
.button{
    appearance: none;
    background-color: transparent;
    color: black;
    border: 1px solid currentColor;
    padding: 0.5em 3.5em;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
}
button{
    cursor: pointer;
}
.button::before{
    content: "";
    width: 20px;
    height: 20px;
    position: absolute;
    top: calc(50% - 10px);
    left: 14px;
    background-image: url(heart.svg);
    background-size: 100%;
}
.dark-button{
    background-color: black;
    color: white;
}
.dark-button::before{
    filter: invert(1);
}