styles.css

#index {
    background: url(./img/backgrounds/colored_land.png) no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

body {
    background-size: cover;
    background-position: center center;
}

p {
    font-family: "Lucida Console", Monaco, monospace;
    width: 90%;
    margin: 0 auto;
    align: justify;
}

div.logo {
    margin: auto;
}

#headerDiv img {
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.demo img {
    margin-left: auto;
    margin-right: auto;
    display: block;
}

div.level {
    width: 100vw;
    height: 100vh;
}

div.board {
    margin: auto;
    width: 400px;
    cursor: crosshair;
}

div.buttons {
    margin: auto;
    width: 370px;
    cursor: pointer;
}

div.imageButtons {
    width: 99%;
    margin: 0 auto;
}

img.button {
    padding-top: 10px;
    padding-right: 20px;
}

div.row {
    width: 90%;
    margin: 0 auto;
    display: inline;
}

div.square {
    width: 100%;
    display: inline;
    margin: auto;
}