* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.game-board {
  max-width: 1024px;
  height: 590px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  background: url("../images/background.png") no-repeat;
  background-size: cover;
}

/* Efeito de neve caindo */
.game-board::after {
  content: "";
  background-image: url(../images/snow.gif);
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  opacity: 0.3;
  z-index: 0;
}

.game-over {
  font-family: Arial, Helvetica, sans-serif;
  position: absolute;
  top: 245px;
  left: 420px;
  color: rgb(68, 196, 228);
  visibility: hidden;
  margin: 0;
}

.clouds {
  width: 300px;
  top: 10px;
  position: absolute;
  animation: clouds-animation 20s infinite linear;
}

.flag {
  position: absolute;
  width: 222px;
  top: 32px;
  left: -3px;
}

.score {
  position: absolute;
  left: 10px;
  top: 199px;
  border: 5px dashed mediumseagreen;
  padding: 0 30px;
  font-family: Arial, Helvetica, sans-serif;
  color: rgb(39, 60, 156);
}

.score-points {
  text-align: center;
  font-size: 1rem;
  margin: 0;
}
.score-title {
  text-align: center;
  font-size: 1.5rem;
  margin: 0;
}

.sonic {
  position: absolute;
  width: 150px;
  transform: rotate(333deg);
  bottom: 0px;
}

.pine {
  position: absolute;
  bottom: 0;
  width: 200px;
  right: 0;
  animation: pipe-animation 1.5s infinite linear;
}

.jump {
  animation: jump 500ms ease-out;
}

@keyframes jump {
  0% {
    bottom: 0;
  }

  40% {
    bottom: 180px;
  }

  50% {
    bottom: 180px;
  }

  60% {
    bottom: 180px;
  }

  100% {
    bottom: 0;
  }
}

@keyframes pipe-animation {
  from {
    right: -200px;
  }

  to {
    right: 100%;
  }
}

@keyframes clouds-animation {
  from {
    right: -300px;
  }

  to {
    right: 100%;
  }
}