/* Background Animation */
@-webkit-keyframes animLand {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -335px 0px;
   }
}

@-moz-keyframes animLand {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -335px 0px;
   }
}

@-o-keyframes animLand {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -335px 0px;
   }
}

@keyframes animLand {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -335px 0px;
   }
}

/* Sky Animation */
@-webkit-keyframes animSky {
   0% {
      background-position: 0px 100%;
   }

   100% {
      background-position: -275px 100%;
   }
}

@-moz-keyframes animSky {
   0% {
      background-position: 0px 100%;
   }

   100% {
      background-position: -275px 100%;
   }
}

@-o-keyframes animSky {
   0% {
      background-position: 0px 100%;
   }

   100% {
      background-position: -275px 100%;
   }
}

@keyframes animSky {
   0% {
      background-position: 0px 100%;
   }

   100% {
      background-position: -275px 100%;
   }
}

/* Bird Animation */
@-webkit-keyframes animBird {
   from {
      background-position: 0px 0px;
   }

   to {
      background-position: 0px -96px;
   }
}

@-moz-keyframes animBird {
   from {
      background-position: 0px 0px;
   }

   to {
      background-position: 0px -96px;
   }
}

@-o-keyframes animBird {
   from {
      background-position: 0px 0px;
   }

   to {
      background-position: 0px -96px;
   }
}

@keyframes animBird {
   from {
      background-position: 0px 0px;
   }

   to {
      background-position: 0px -96px;
   }
}

/* Pipe Animation */
@-webkit-keyframes animPipe {
   0% {
      left: 900px;
   }

   100% {
      left: -100px;
   }
}

@-moz-keyframes animPipe {
   0% {
      left: 900px;
   }

   100% {
      left: -100px;
   }
}

@-o-keyframes animPipe {
   0% {
      left: 900px;
   }

   100% {
      left: -100px;
   }
}

@keyframes animPipe {
   0% {
      left: 900px;
   }

   100% {
      left: -100px;
   }
}

/* Ceiling Blocks Animation */
@-webkit-keyframes animCeiling {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -63px 0px;
   }
}

@-moz-keyframes animCeiling {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -63px 0px;
   }
}

@-o-keyframes animCeiling {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -63px 0px;
   }
}

@keyframes animCeiling {
   0% {
      background-position: 0px 0px;
   }

   100% {
      background-position: -63px 0px;
   }
}

/* 
  ///// GAME CONFIGURATIONS 
*/

html,
body {
   width: 100%;
   height: 100%;
   overflow: hidden;
   font-family: monospace;
   font-size: 12px;
   color: #fff;
}

/* Game Body */
#main-game {
   position: relative;
   /* max-width: 767px; */
   width: 100%;
   height: 100%;
}

/* Game Screen */
#screen-game {
   position: absolute;
   width: 100%;
   height: 100%;
}

/* 
  ///// GAME AREAS
*/

/* Background */
#background-game {
   position: absolute;
   top: 0;
   width: 100%;
   height: 80%;
   background-image: url("../assets/sky.png");
   background-repeat: repeat-x;
   background-position: 0px 100%;
   background-color: #4ec0ca;
   -webkit-animation: animSky 7s linear infinite;
   animation: animSky 7s linear infinite;
}

/* Flight Area */
#flyarea-game {
   display: flex;
   position: relative;
   position: absolute;
   bottom: 0;
   justify-content: center;
   align-items: center;
   height: 100%;
   width: 100%;
}

/* Island Footer */
#footer-game {
   position: absolute;
   bottom: 0;
   width: 100%;
   height: 20%;
   background-image: url("../assets/land.png");
   background-repeat: repeat-x;
   background-position: 0px 0px;
   background-color: #ded895;
   -webkit-animation: animLand 2516ms linear infinite;
   animation: animLand 2516ms linear infinite;
}

/* Big Score */
#bigscore {
   position: absolute;
   top: 10%;
   z-index: 100;
}

#bigscore img {
   display: inline-block;
   padding: 1px;
}

/* Start Screen */
#splash {
   position: absolute;
   opacity: 0;
   width: 188px;
   height: 170px;
   background-image: url('../assets/splash.png');
   background-repeat: no-repeat;
}

/* Scoreboard Screen */
#scoreboard {
   position: absolute;
   display: none;
   opacity: 0;
   width: 236px;
   height: 280px;
   background-image: url('../assets/scoreboard.png');
   background-repeat: no-repeat;
   z-index: 1000;
}

/* Medals */
#medal {
   position: absolute;
   opacity: 0;
   top: 114px;
   left: 32px;
   width: 44px;
   height: 44px;
}

/* Obtained Points */
#currentscore {
   position: absolute;
   top: 105px;
   left: 107px;
   width: 104px;
   height: 14px;
   text-align: right;
}

#currentscore img {
   display: inline;
   padding-left: 2px;
   /* For debugging */
}

/* Highest Score Achieved */
#highscore {
   position: absolute;
   top: 147px;
   left: 107px;
   width: 104px;
   height: 14px;
   text-align: right;
}

#highscore img {
   display: inline;
   padding-left: 2px;
}

/* Restart Screen */
#replay {
   position: absolute;
   opacity: 0;
   top: 205px;
   left: 35%;
   width: 70px;
   cursor: pointer;
}

/* HACK to compute the borders of the sprites */
.boundingbox {
   position: absolute;
   display: none;
   top: 0;
   left: 0;
   width: 0;
   height: 0;
   border: 1px solid red;
}

/* Initial Position of Bird */
#player {
   left: 30%;
}

/* Bird Sprite Configurations */
.bird {
   position: absolute;
   width: 34px;
   height: 24px;
   background-image: url('../assets/bird.png');
   -webkit-animation: animBird 300ms steps(4) infinite;
   animation: animBird 300ms steps(4) infinite;
}

/* Pipe Position and Animation Configurations */
.pipe {
   position: absolute;
   left: -100px;
   width: 52px;
   height: 100%;
   z-index: 10;
   -webkit-animation: animPipe 7500ms linear;
   animation: animPipe 7500ms linear;
}

/* Configurations for the Top Pipe */
.pipe_upper {
   position: absolute;
   top: 0;
   width: 52px;
   background-image: url('../assets/pipe.png');
   background-repeat: repeat-y;
   background-position: center;
}

/* Configurations for the Mouth of the Top Pipe */
.pipe_upper:after {
   content: "";
   position: absolute;
   bottom: 0;
   width: 52px;
   height: 26px;
   background-image: url('../assets/pipe-down.png');
}

/* Configurations for the Bottom Pipe */
.pipe_lower {
   position: absolute;
   bottom: 0;
   width: 52px;
   background-image: url('../assets/pipe.png');
   background-repeat: repeat-y;
   background-position: center;
}

/* Configurations for the Mouth of the Bottom Pipe */
.pipe_lower:after {
   content: "";
   position: absolute;
   top: 0;
   width: 52px;
   height: 26px;
   background-image: url('../assets/pipe-up.png');
}