body {
  margin: 0;
  padding: 0;
  background: #f0f0f0;
  font-family: sans-serif;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.game-title {
  font-size: 36px;
  color: #333;
  margin-bottom: 10px;
}

#scoreboard {
  display: flex;
  gap: 30px;
  font-size: 20px;
  color: #222;
  margin-bottom: 10px;
}

.game {
  width: 720px;
  height: 240px;
  border: 2px solid #333;
  border-radius: 10px;
  position: relative;
  overflow: hidden;
  background-color: #fff;
}

#dino {
  font-size: 40px;
  position: absolute;
  bottom: 0;
  left: 50px;
  transform: scaleX(-1);
  transition: bottom 0.2s;
}

.cactus {
  font-size: 32px;
  position: absolute;
  bottom: 0;
}

.jump {
  animation: jump 0.5s ease-out;
}

@keyframes jump {
  0%   { bottom: 0; }
  50%  { bottom: 100px; }
  100% { bottom: 0; }
}