html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

#root {
 width: 100%;
 height: 100%;
}

body:has(textarea) {
    background-color: aliceblue;
}

body:has(textarea:focus) {
    background-color: #eaffe3;
}