html {
    display: flex;
    justify-content: center;
    text-align: center;
    background: lightblue;
    height: 100vh;
    overflow: hidden;
}

* {
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}

body {
    width: 100%;
}

h1 {
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    font-size: 2.5rem;
    margin-top: 10px;
    margin-bottom: 14px;
}

#backdrop {
    display: block;
    background: url("/games/backgrounds/blue2.jpg");
    border: 6px solid black;
    width: 100%;
    height: 80%;
}

#flash {
    margin: 30px;
    width: 400px;
    height: 80px;
    border-radius: 10px;
    background: white;
    border: 7px dashed black;
    box-sizing: content-box;
}

#display {
    margin: 30px;
    font-size: 2.5rem;
    font-weight: 900;
}

button {
    margin: 30px;
    border: 5px solid black;
    border-radius: 20px;
    height: 100px;
    width: 500px;
    color: black;
    font-size: 3rem;
    font-weight: 800;
}

#start {
    background: lightgreen;
}

#stop {
    background: #FFCCCB;
}

#footer {
    margin-top: 6px;
}

a {
    padding: 0 1px 0 1px;
}