body
{
    background-color: #333;
    position: absolute;
    height: 100%;
    width: 100%;
    margin: 0;
    font-family: Sans;
    transition: background-color 500ms ease-in;
}
body.idle
{
    background-color: #08D;
}
body.doing
{
    background-color: #333;
}
body.done
{
    background-color: #4A0;
}
#container
{
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
#child
{
    max-width: 90%;
    text-align: center;
}
#text
{
    color: white;
    font-size: 24em;
    font-weight: bold;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    line-height: 1em;
}
#error
{
    color: red;
    font-size: 3em;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}
button
{
    position: fixed;
    margin: 1em;
    padding: 1em;
    top: 0;
    right: 0;
    background-color: transparent;
    border: none;
    cursor: pointer;
}
button:hover
{
    background-color: rgba(0, 0, 0, 0.4);
    border-radius: .2em;
}
button > img
{
    height: 3em;
    display: block;
}