body {
  font-family: Arial;
}
canvas {
  border: 1px solid #000;
}
kbd {
  border: 1px solid #888;
  border-radius: 3px;
  font-family: Arial;
  font-size: 11pt;
  padding: 2px 6px;
}
.container {
  margin: auto;
  width: 800px;
}
#game {
  margin-bottom: 15px;
}
#health-bars, #controls {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
.health-label {
  line-height: 1.5em;
}
.health {
  background: #ccc;
  height: 20px;
  position: relative;
  width: 320px;
}
.fill {
  background: #0a0;
  display: block;
  height: 20px;
  position: absolute;
  transition: width 0.5s;
}
#controls {
  display: flex;
  flex-direction: row;
  margin-bottom: 5px;
}
#p1-health {
  left: 0;
  width: 0%;
}
#p2-health {
  right: 0;
  width: 0%;
}
#p1-ctrls, #p2-ctrls {
  display: flex;
  flex-direction: row;
  flex: 0 0 50%;
}
#p2-ctrls {
  justify-content: flex-end;
}
#keys {
  display: flex;
  flex-direction: row;
  flex: 0 0 50%;
  justify-content: space-between;
}
#p1-keys kbd:nth-of-type(1) {
  margin-left: 35px;
}
#p1-keys kbd:nth-of-type(2) {
  margin-left: 60px
}
#p1-keys kbd:nth-of-type(3) {
  margin-left: 65px
}
#p1-keys kbd:nth-of-type(4) {
  margin-left: 45px
}
#p2-keys {
  justify-content: flex-end;
}
#p2-keys kbd:nth-of-type(1) {
  margin-right: 60px;
}
#p2-keys kbd:nth-of-type(2) {
  margin-right: 60px
}
#p2-keys kbd:nth-of-type(3) {
  margin-right: 65px
}
#p2-keys kbd:nth-of-type(4) {
  margin-right: 35px
}
.move, .a-btn, .b-btn {
  border-radius: 50%;
  cursor: pointer;
  display: block;
  font-size: 30pt;
  margin: 5px;
  width: 80px;
  height: 80px;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.a-btn, .b-btn {
  color: #fff;
  line-height: 2em;
  text-align: center;
}
.arrow-left, .arrow-right {
  display: block;
  margin: 15px auto;
}
.arrow-left {
  width: 0; 
  height: 0; 
  border-bottom: 25px solid transparent;
  border-top: 25px solid transparent;
  border-right: 25px solid #2f2f2f;
  font-size: 0;
  line-height: 0;
}
.arrow-right {
  width: 0; 
  height: 0; 
  border-bottom: 25px solid transparent;
  border-top: 25px solid transparent;
  border-left: 25px solid #2f2f2f;
  font-size: 0;
  line-height: 0;
}
.move {
  background: #888;
}
.move:active {
  background: #666;
}
.a-btn {
  background: #04c;
}
.a-btn:active {
  background: #028;
}
.b-btn {
  background: #080;
}
.b-btn:active {
  background: #040;
}