html, body {
    background-color: #F0F0F0;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

@media (prefers-color-scheme: dark) {
      body {
        background-color: #F0F0F0F;
     }
}

img {
    height: 15vh;
    width: 15vh;
}