app/assets/stylesheets/administrate/base/_layout.scss
html {
background-color: $color-white;
box-sizing: border-box;
font-size: 16px;
-webkit-font-smoothing: antialiased;
}
*,
*::before,
*::after {
box-sizing: inherit;
}
figure {
margin: 0;
}
img,
picture {
margin: 0;
max-width: 100%;
}