* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}
.background {
  height: 100vh;
  width: 100vw;
  background: url("images/background-img.png") no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -moz-background-size: cover;
  background-size: cover;
}
.bird {
  height: 100px;
  width: 130px;
  position: fixed;
  top: 40vh;
  left: 40vh;
  z-index: 100;
}
.pipe_sprite {
  position: fixed;
  top: 40vh;
  left: 100vh;
  height: 70vh;
  width: 6vw;
  background: radial-gradient(lightgreen 50%, green);
  border: 5px solid black;
}
.message {
  position: absolute;
  z-index: 10;
  color: black;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
.messageStyle {
  background-color: white;
  padding: 30px;
  box-shadow: rgba(0, 0, 0, 0, 24) 0px 3px 8px;
  border-radius: 5%;
}
.score {
  position: fixed;
  z-index: 10;
  height: 10vh;
  font-size: 10vh;
  font-weight: 100;
  color: white;
  -webkit-text-stroke-width: 2px;
  -webkit-text-stroke-color: black;
  top: 0;
  left: 0;
  margin: 10px;
}
.score_val{
    color: gold;
    font-weight: bold;
}
@media only screen and (max-width : 1000px){
    .message{
        font-size: 50px;
        top: 50%;
        white-space: nowrap;
    }
    .score{
        font-size: 8vh;
    }
    .bird{
        width: 120px;
        height: 90px;
    }
    .pipe_sprite{
        width: 14vw;
    }
}