@-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;
    }
}


/* Animação de ceu */

@-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%;
    }
}


/* Animação de bird */

@-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;
    }
}


/* Animação dos canos */

@-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;
    }
}


/* Animação dos blocos do muro */

@-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;
    }
}

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

#left-back {
    position: absolute;
    width: 400px;
    height: 800px;
    background: black;
    z-index: 11;
    background-image: linear-gradient(#4ec0ca, #ded895);
}

#right-back {
    position: absolute;
    margin-left: 1150px;
    width: 400px;
    height: 800px;
    background: black;
    z-index: 11;
    background-image: linear-gradient(#4ec0ca, #ded895);
}

#logo {
    position: absolute;
    margin-left: 270px;
    margin-top: 20px;
}

#main-game {
    position: relative;
    max-width: 767px;
    height: 100%;
    min-height: 525px;
    margin-left: 400px;
}

#screen-game {
    position: absolute;
    width: 100%;
    height: 100%;
}

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

#flyarea-game {
    position: absolute;
    bottom: 0;
    height: 420px;
    width: 100%;
}

#ceiling {
    position: absolute;
    top: -16px;
    height: 16px;
    width: 100%;
    background-image: url("../assets/sprites/ceiling.png");
    background-repeat: repeat-x;
    -webkit-animation: animCeiling 481ms linear infinite;
    animation: animCeiling 481ms linear infinite;
}

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

#bigscore {
    position: absolute;
    top: 20px;
    left: 150px;
    z-index: 100;
}

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

#splash {
    position: absolute;
    opacity: 0;
    top: 75px;
    left: 65px;
    width: 188px;
    height: 170px;
    background-image: url('../assets/sprites/splash.png');
    background-repeat: no-repeat;
}

#scoreboard {
    position: absolute;
    display: none;
    opacity: 0;
    top: 64px;
    left: 43px;
    width: 236px;
    height: 280px;
    background-image: url('../assets/sprites/scoreboard.png');
    background-repeat: no-repeat;
    z-index: 1000;
}

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

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

#currentscore img {
    padding-left: 2px;
}

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

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

#replay {
    position: absolute;
    opacity: 0;
    top: 205px;
    left: 61px;
    height: 115px;
    width: 70px;
    cursor: pointer;
}

.boundingbox {
    position: absolute;
    display: none;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    border: 1px solid red;
}

#player {
    left: 60px;
    top: 200px;
}

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

.pipe {
    position: absolute;
    left: -100px;
    width: 52px;
    height: 100%;
    z-index: 10;
    -webkit-animation: animPipe 7500ms linear;
    animation: animPipe 7500ms linear;
}

.pipe_upper {
    position: absolute;
    top: 0;
    width: 52px;
    background-image: url('../assets/sprites/pipe.png');
    background-repeat: repeat-y;
    background-position: center;
}

.pipe_upper:after {
    content: "";
    position: absolute;
    bottom: 0;
    width: 52px;
    height: 26px;
    background-image: url('../assets/sprites/pipe-down.png');
}

.pipe_lower {
    position: absolute;
    bottom: 0;
    width: 52px;
    background-image: url('../assets/sprites/pipe.png');
    background-repeat: repeat-y;
    background-position: center;
}

.pipe_lower:after {
    content: "";
    position: absolute;
    top: 0;
    width: 52px;
    height: 26px;
    background-image: url('../assets/sprites/pipe-up.png');
}
canvas {
  width: 100%;
  height: auto;
  max-width: 100%;
}