body {
  background-color: #006666;
    /* For WebKit (Safari, Chrome, etc) */
    background: #006666 -webkit-gradient(linear, left top, left bottom, from(#002266), to(#006666)) no-repeat;
    /* Mozilla,Firefox/Gecko */
    background: #006666 -moz-linear-gradient(top, #002266, #006666) no-repeat;
    /* IE 5.5 - 7 */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#002266, endColorstr=#006666) no-repeat;
    /* IE 8 */
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#002266, endColorstr=#002266)" no-repeat;
  font-family: sans-serif;
  margin: 0;
  padding: 0;
}

#game {
  border: none;
  cursor: url(images/weapon-crosshair.png) 11 11, crosshair;
  margin: 0 auto;
  display: block;
  background-color: #006666;
    /* For WebKit (Safari, Chrome, etc) */
    background: #006666 -webkit-gradient(linear, left top, left bottom, from(#002266), to(#006666)) no-repeat;
    /* Mozilla,Firefox/Gecko */
    background: #006666 -moz-linear-gradient(top, #002266, #006666) no-repeat;
    /* IE 5.5 - 7 */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#002266, endColorstr=#006666) no-repeat;
    /* IE 8 */
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#002266, endColorstr=#002266)" no-repeat;
}

div {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-flow: column;
  margin-top: 19.5rem;
  position: absolute;
  width: 100%;
}

.start-btn {
  border: none;
  border-radius: 0.2rem;
  background-color: transparent;
  cursor: pointer;
  color: white;
  margin-bottom: 4rem;
  font-size: 2rem;
  height: 3rem;
  width: 14rem;
}

.start-btn:hover {
  color: rgba(15, 111, 175, 1);
  background-color: transparent;
}

.highscore {
  display: none;
  font-size: 2rem;
  z-index: 10;
}

h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.5em;
  color: orangered;
}

.highscore input {
  font-size: 1.5rem;
  text-align: center;
  text-transform: uppercase;
}

.debug {
  display: none;
  position: absolute;
  float: left;
  top: 0;
  width: 14em;
  margin: 2rem;
  padding: 1rem;
}

.debug:before {
  content: 'Debugger stats:';
  font-family: sans-serif;
  font-size: 1rem;
}