game.css

* {
    margin: 0;
    padding: 0;

    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

html, body {
    overflow-x: hidden;
    overflow-y: hidden;
    height: 100%;
}

body {
    width: 600px;
    text-align: center;
    position: relative;
    font-family: sans-serif;
}

button {
    font-size: 3em;
    padding: 0.1em 0.25em;
    background-color: gray;
    border-radius: 4px;
    box-shadow: 0 0 5px #333;
    border: 2px solid #222;
}

#holder {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    border: 1px solid black;
    height: 100%;
}

.screen {
    display: flex;
    width: 100%;
    height: 100%;
    flex-direction: column;
    align-items: center;
    background-color: #fffacd;
}

.title {
    margin-top: 4vh;
    font-size: 6em;
    color: #222;
    text-shadow: 0 0 7px #444;
    font-family: serif;
    margin-bottom: 15vh;
    font-weight: bold;
}

.credits {
    margin-top: auto;
    margin-bottom: 1vh;
    font-size: 1.5em;
    color: #777;
}

#start-screen > button {
    margin-top: 3vh;
}

.actions > button {
    margin: 1vh;
    vertical-align: center;
}

.actions {
    margin-top: 6vh;
}

.stats-info {
    border-radius: 10px;
}

.stats-info > div {
    padding: 0.2em 0.2em;
    font-size: 1.7em;
}

.stats-info > div:last-child {
    border-bottom: none;
}

.stats {
    font-family: monospace;
    font-weight: bold;
    font-size: 1.5em;
    color: #333;
}

.setting > label {
    font-size: 2em;
    margin-top: 1vh;
}