body {
    margin: 0px auto;
    width: 340px;
    background: rgb(233,245,244);
}



#time-display {
    font-family: sans-serif;
    font-size: 40px;
    line-height: 2em;  
    margin: 20px 0;
    width: 100%;
    text-align: center;
}

#stopper-buttons {
    width: 100%;
    margin-bottom: 20px;
    text-align: center;
}

.stopper-button {
    width: 70px;
    height: 60px;
    font-size: 12px;
    line-height: 70px;
    color: rgb(50,128,128);
}

#start-timer {
    margin-left: 6px;
}