html, body {
    font-family: sans-serif;

    /* Make sure canvas fills screen */
    margin: 0;
    padding: 0;

    /* Prevent scrollbars */
    overflow: hidden;
}

#lives {
    position: absolute;
    top: 2em;
    right: 2em;
}
.life {
    margin: 1em;
}

button {
    border: none;
    color: white;
    background-color: blue;
    opacity: 0.5;

    padding: 0.5em 1em;

    cursor: pointer;
}

#help-button {
    position: absolute;
    top: 1em;
    left: 1em;
}

.dialog {
    color: rgb(255, 255, 200);
    background-color: rgba(0, 0, 30, 0.8);
    text-align: center;

    position: absolute;
    left: 30%;
    top: 25%;
    width: 40%;
    z-index: 1;
    padding: 2em;

    cursor: auto;

    /* Hidden by default */
    display: none;
}