index.css

/* General elements */

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: black;
    color: #fafafa;
    overflow-x: hidden;
	overflow-y: scroll;
}

header {
    height: 49px;
    overflow: hidden;
    -ms-user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

section {
    clear: both;
}

a {
    color: white;
    font-weight: bold;
    text-decoration: none;
}


/* General animations */

.hoverable {
    opacity: .84;
    transition: 140ms opacity;
}

.hoverable:hover {
    opacity: 1;
}


/* Header */

#header-right {
    position: absolute;
    top: 0;
    right: 3px;
    opacity: 1;
    transition: 280ms opacity;
}

@media(max-width: 819px) {
    #header-right {
        opacity: 0;
    }
}


/* Game section */

section#game {
    min-height: 464px;
}

section#game .EightBitter {
    margin: auto;
}



/* Control section */

#controls {
    text-align: center;
}

#controls .control {
    position: relative;
    display: inline-block;
    margin-top: 0;
    height: 35px;
    width: 256px;
    border: 3px solid black;
    border-radius: 7px;
    box-shadow: 0 3px 7px black inset;
    background: black;
    font-family: 'Press Start';
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    overflow: hidden;
    transition: 70ms all;
}

#controls.length-4 .control {
    min-width: 25%;
}

#controls.length-5 .control {
    min-width: 20%;
}

#controls .control:hover {
    margin-top: -288px;
    height: 316px; /* 288px + 28px */
    border-color: #99ffcc;
    background: #009966;
    z-index: 70;
}

#controls .control h4 {
    position: absolute;
    right: 0;
    bottom: 7px;
    left: 0;
    margin: 0;
}

#controls .control-inner {
    margin-top: 28px;
    padding: 7px 3px;
    opacity: 0;
    transition: 35ms opacity;
}

#controls .control:hover .control-inner {
    display: block;
    margin-top: 0;
    opacity: 1
}

#controls .select-options {
    position: relative;
    max-height: 277px;
    overflow-y: auto;
}

#controls .select-option-title {
    padding: 11px;
}

#controls .select-option {
    margin: 1px 3px;
    display: inline-block;
    background: #ffcc33;
    border: 3px outset;
    cursor: pointer;
    color: black;
    font-size: 14px;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

#controls .select-option.option-enabled {
    background: #ffcc33;
}

#controls .select-option.option-disabled {
    background: #ccaa33;
}

#controls .select-option.select-option-inset {
    border: 3px inset;
}

#controls .select-option.select-option-large {
    padding: 14px 0;
    font-size: 15px;
    line-height: 140%;
}

#controls .disabled {
    opacity: .49 !important;
    cursor: default !important;
    -ms-user-select: none !important;
    -moz-user-select: none !important;
    -webkit-user-select: none !important;
    user-select: none !important;
}


/* Controls - option buttons */

#controls .options-button-option {
    position: relative;
    display: block;
    left: 0;
    right: 0;
    padding: 4px 0;
    /* width: 70px; */
}

#controls input[type=number] {
    display: inline;
    margin-left: -3px;
    padding-left: 17px;
    width: 42px;
    /* font-size: 1em; */
    font-family: "Press Start";
}

#controls select {
    /* font-size: 1em; */
    font-family: "Press Start";
}


/* Controls - options */

#controls #control-Options .select-options td {
    padding-top: 7px;
    padding-bottom: 7px;
}


/* Controls - option keys */

#controls .options-label-Keys {
    padding-left: 14px;
}

#controls .options-cell-Keys {
    padding: 7px 0;
}

#controls .options-key-option {
    display: inline;
}

#controls .options-key-option:not(:last-of-type):after {
    content: ", ";
}


/* Controls - tables */

#controls table {
    width: 100%;
    border-spacing: 1px;
}

#controls .maps-grid-option {
    display: table-cell;
    padding: 3px;
}

#controls .maps-grid-option-extra {
    display: block;
    margin: 7px 2px 0 1px;
    padding: 3px 0;
}

#controls .maps-grid-input {
    margin: 0 2px 0 1px;
    width: 98%;
    box-sizing: border-box;
    font-family: 'Press Start';
    text-align: center;
}


/* Controls - uploader */

#controls .select-upload {
    cursor: pointer;
    overflow: hidden;
}

#controls .select-upload-input {
    display: none;
}


/* Text sections */

section.section-text {
    margin: auto;
    padding: 21px 70px;
    max-width: 910px;
    font-size: 1.4em;
    text-align: center;
}

.link-github {
    color: #cfc;
}

.link-facebook {
    color: #ccf;
}

.link-twitter {
    color: #cff;
}

@media(max-width: 350px) {
    section.section-text {
        padding: 14px 7px;
    }
}