.full-size {
    height: 90vh;
    width: 100%;
}

textarea,
[contenteditable] {
    border: 1px solid #ccc;
    outline: none;
    margin: 5px;
    padding: 20px;
}
[contenteditable] {
    overflow-y: auto;
}
[contenteditable] span.empty {
    color: #d3d2d2;
}
[contenteditable] span.error {
    color: red;
}
[contenteditable] span.skipped {
    color: rgba(255 196 196 / 40%);
}
[contenteditable] span.space {
    display: inline-block;
}