styles.css

body {
    background-color: rgba(0, 0, 0, 0.8);
    /*font-family: 'Raleway', sans-serif;*/
    font-family: 'Press Start 2P', sans-serif;
    color: white;
    box-sizing: border-box;
}

a, a:link, a:visited {
    color: red;
    cursor: pointer;
}

a:hover {
    color: yellow;
}

#container, #canvas-container {
    margin: 0 auto;
}

#canvas-container {
    position: relative;
}

#game-menu {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
}

.game-menu-content {
    padding: 20px;
    box-sizing: border-box;
    display: none;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
}

#start-menu {
    display: flex;
    align-items: center;
    text-align: center;
}

#infos, h1 {
    text-align: center
}

#help {
    display: none;
    font-family: 'Raleway', sans-serif;
}

#bonus {
    z-index: 1;
    position: absolute;
    text-align: center;
    text-shadow: 0px 0px 12px black;
}

#nom, #recommencer {
    width: 100%;
}

#recommencer {
    height: 40px;
}

.btn, #nom {
    border: none;
    color: white;
    margin-top: 10px;
    padding: 10px;
    background-color: black;
    font-family: 'Press Start 2P', sans-serif;
}

#nom:focus {
    outline: none;
    border-bottom: 1px white solid;
}

.btn:hover {
    background-color: white;
    color: black;
}

.btn:disabled {
    background-color: grey;
}

#score-form {
    display: flex;
    height: 80px;
}

#gameover-flexbox {
    display: flex;
    flex-direction: column;
    height: 100%;
}

#scores {
    height: 100%;
    overflow: auto;
}

table {
    width: 100%;
}

@media (max-width: 600px) {
    #gameover-menu {
        font-size: 0.5em;
    }

    #game-menu-content {
        padding: 0;
    }
}