html,body {
    height: 100%;
    margin: 0px;
    padding: 0px;
}

body {
    font-family: "Arial", "Helvetica", sans-serif;
}

.sidebar {
    height: 100%;
    width: 7em;
    color: #fff;
    background-color: #c00;
    text-align: center;
}

.page {
    margin: 2em;
    width: 40em;
    padding: 1em;
    border: solid black 1px;
}

.board {
    height: 100%;
    display: flex;
    flex-direction: row;
}

#root {
    height: 100%;
}