body, html {
    position: absolute;
    width: 100%;
    height: 100%;

    padding: 0px;
    margin: 0px;

    overflow: hidden;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
}

h1 {
    font-size: 125%;
}

div.app {
    position: absolute;

    padding: 0px;
    margin: 0px;
}



.logo {
    display: inline-block;
    border: 1px solid black;
    font-size: 18px;
    font-weight: 800;

    flex-grow: 0;
    flex-shrink: 0;
}
.logo > div {
    display: inline-block;
    padding: 4px;
}

.flex {
    display: flex;
}

.flex.row {
    flex-direction: row;
}
.flex.column {
    flex-direction: column;
}

.flex > * {
    margin: 4px;
}