.timer {
    text-align: center;
    margin-top: 50px;
    color: white;
}

#display {
    font-size: 2em;
}

button {
    margin: 10px;
    padding: 5px 10px;
    font-size: 1em;
}

body {
    font-size: 40px; 
    background-color: darkgrey;
}

#startBtn{
    color: green;
}

#stopBtn{
    color: red;
}