html {
  height: 100%;
  box-sizing: border-box;
  font-family: sans-serif;
}
* {
  margin: 0;
  padding: 0;
}
* *:before *:after {
  box-sizing: border-box;
}
html,
body {
  min-height: 100%;
  height: 100%;
  display: block;
}
#gameContainer {
  min-height: 100%;
  height: 100%;
  background: #23a6d5;
}
.interfaceLayer {
  z-index: 2;
  position: absolute;
  overflow: hidden;
  min-height: 100%;
  height: 100%;
  width: 100%;
}
.interface {
  min-height: 100%;
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
#startGameScreen.interface {
  background: rgba(1,1,1,0.5);
}
#startGameScreen.interface .legend {
  text-align: center;
  padding: 50px;
  color: #fff;
}
#gameInterface {
  justify-content: flex-end;
}
#gameInterface .scoreContainer {
  padding: 10px;
  background: rgba(1,1,1,0.3);
  color: #fff;
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-content: space-between;
  font-size: 2em;
}
#gameInterface .score,
#gameInterface #health {
  padding: 10px;
}
#endGameScreen.interface {
  background: rgba(1,1,1,0.8);
}
#endGameScreen.interface .legend {
  text-align: center;
  padding: 50px;
  color: #fff;
}
#endGameScreen.interface .score {
  color: #ee7752;
}
.hidden {
  display: none;
}
.playerLayer {
  z-index: 1;
  position: absolute;
  width: 100%;
}
.playerLayer #player {
  position: relative;
  top: 20px;
  left: 45%;
  width: 10vw;
  height: 10vw;
  background: url("../pic/cat.png");
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  transition: transform 0.3s ease-in-out;
}
.playerLayer .direction {
  transform: scaleX(-1);
}
.backgroundLayer {
  z-index: 0;
  min-height: 100%;
  height: 100%;
  overflow: hidden;
}
.backgroundLayer .obstacles {
  position: relative;
  box-sizing: border-box;
  min-height: 100%;
  width: 100%;
  border-left: 5px dashed #ee7752;
  border-right: 5px dashed #ee7752;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
}
.obstacleRow {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
.obstacleRow div {
  height: 60px;
  flex-grow: 1;
}
.obstacleRow .obstacle {
  background: #ee7752;
}
.obstacleRow .collided {
  background: #f00;
}
.btn {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 2px;
}
.cta-btn {
  font-size: 1.1rem;
  background-color: #fff;
  padding: 0.9rem 1.8rem;
  color: var(--body-font-color);
/* border-radius: .4rem; */
  transition: background-color 0.5s;
}
.cta-btn:hover,
.cta-btn:focus {
  color: #fff;
  background-color: #000;
  cursor: pointer;
}