style.css

@font-face {
  font-family: FreePixel;
  src: url(fonts/FreePixel.ttf);
}

@font-face {
  font-family: Retro-Computer;
  src: url(fonts/Petyka-Retro-Computer.ttf);
}

html { font-size:62.5%; }

body {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  font-family: FreePixel;
  font-size: 1.9rem;
  margin: auto;
}

a {
  color: #000;
}
a:hover {
  font-weight: 600;
}

h1,h2,h3,h4{ font-family: Retro-Computer; }

button:focus { outline: none; }

video { display:none; }

canvas {
  display: block;
  margin: auto;
}

footer {
  margin-top: 100px;
  margin-bottom: 100px;
  text-align: center;
}

footer > * {
  margin-bottom: 50px;
}

#start {
  position: absolute;
  height: 672px;
  top: 0;
  left: 0;
  right: 0;
  margin-left: auto;
  margin-right: auto;
  width: 672px;

  -webkit-transition: background-color 0.27s; /* Safari */
  transition: background-color 0.27s ease-out;
}
#start button{ opacity: 0; }
#start:hover {
  background-color: rgba(0,0,0,0.65);
}
#start:hover button, #start:hover span{ opacity: 1; }
#start button {
  position: absolute;
  top: 45%;
  left: 0;
  right: 0;
  margin-left: auto;
  margin-right: auto;
  transform: translateY(-50%);
  width: 100px;

  -webkit-transition: background-color 0.15s; /* Safari */
  transition: background-color 0.15s ease-out;

  background-color: rgba(0,0,0,0);
  border: 2px solid #FFF;
  color: #FFF;
  display: block;
  font-family: Retro-Computer;
  font-size: 1.8rem;
  margin-top: 35px;
  margin-bottom: 35px;
  padding: 5px 10px 10px 10px;
  text-transform: uppercase;
  text-align: center;
}
#start button:hover {
  color: #000;
  background-color: #FFF;
}
#start span {
  color: #FFF;
  font-family: Retro-Computer;
  font-size: 1.2rem;
  left: 0;
  right: 0;
  margin-left: auto;
  margin-right: auto;
  position: absolute;
  opacity: 0;
  text-align: center;
  text-transform: uppercase;
  top: 60%;
  width: 250px;
}

#settings {
  text-transform: uppercase;
  display: block;
  margin: auto;
  margin-top: 50px;
  border: 2pt dotted #000;
  padding: 15px;
  width: 250px;
}
#settings div > * {
  vertical-align: middle;
  margin-top: 7px;
  margin-bottom: 7px;
}
#settings .title {
  font-size: 1.6rem;
  font-family: Retro-Computer;
  margin-bottom: 20px;
}
#settings label {
  display: inline-block;
  width: 125px;
  text-align: right;
}
#settings button {
  border: 1pt solid #000;
  background-color: #FFF;
  color: #000;
  font-family: FreePixel;
  text-transform: uppercase;
}
#settings button:hover {
  border: 1pt solid #000;
  background-color: #000;
  color: #FFF;
}

#toggle-fill {
  padding-top: 5px;
}

#github {
  list-style: none;
  padding: 0;
}
#github li {
  margin-bottom: 10px;
}

#pixels {
  display: inline-block;
  list-style: none;
  padding: 0;
  margin: 0;
}
#pixels li {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 1px solid black;
}
#pixels li:hover {
  transform: scale(1.1);
}

.center-text { text-align: center; }

.row {
  width: 100%;
  position: relative;
}

.content.row {
  width: 80%;
  padding-left: 10%;
  padding-right: 10%;
}

.pixel {
  background-color: #000;
  display: inline-block;
}
.pixel[val="2"] {
  margin: 7px;
  width: 2px;
  height: 2px;
}
.pixel[val="4"] {
  margin: 6px;
  width: 4px;
  height: 4px;
}
.pixel[val="6"] {
  margin: 5px;
  width: 6px;
  height: 6px;
}
.pixel[val="8"] {
  margin: 4px;
  width: 8px;
  height: 8px;
}

.modal {
  display: block;
  position: absolute;
  vertical-align: middle;
  top: 25%;
  width: 100%;
  z-index: 1;
}
.modal a { color: #fff; }
.modal button {
  display: block;
  background-color: #FFF;
  border: solid 1px #FFF;
  color: #000;
  font-family: Retro-Computer;
  font-size: 2.2rem;
  margin: auto;
  padding: 5px 10px 10px 10px;
}
.modal button:hover {
  background-color: #000;
  color: #FFF;
}
.modal .modal-content {
  background-color: #000;
  color: #FFF;
  font-size: 2.5rem;
  margin: auto;
  padding: 30px;
  width: 400px;
}

.hidden {
  display: none;
}

.modal .title {
  font-family: Retro-Computer;
  font-size: 3rem;
}