body {
    background-color: #2a2a2a;
    text-align: center;
    overflow-y: hidden;
    -webkit-tap-highlight-color: rgba(0,0,0,0);
}

#footer {
    height: 40px;
    position: relative;
    margin: 30px auto;
    visibility: hidden;
}

a {
    border-radius: 6px;
    background-color: #666;
    color: white;
    font-family: Lucida Console, monospace;
    font-weight: bold;
    font-size: 16px;
    padding: 10px;
}

#restart {  
    margin-right: 10px;
    cursor: pointer;
}

#score {
    float: right;
    text-align: right;
}

#playground {
    width: 400px;
    height: 400px;
}

#nextballs-container {
    display: flex;
    float: left;
    position: absolute;
    align-items: center;
    top: 0;
    left: 0;
    height: 40px;
}

#scoreboard-container, #restart-container {
    display: flex;
    float: right;
    flex-direction: column;
    justify-content: center;
    height: 40px;
}