html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: 'Arial', sans-serif;
  color: white;
}
.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: url('Image/Galaxy.jpg') center center / cover no-repeat;
}
@keyframes moveBg {
  0% { background-position: 0 0; }
  100% { background-position: 1000px 0; }
}
@keyframes zoomInOut {
  0% { transform: scale(1); }
  50% { transform: scale(1); }
  100% { transform: scale(1); }
} 
.content {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
.content img {
  width: 800px;
  margin-bottom: 10px;
  margin-top: 150px;
  animation: zoomInOut 8s infinite ease-in-out;
}

.comet {
  position: absolute;
  left: 0; /* Punto di partenza a sinistra */
  bottom: 0; /* Punto di partenza in basso */
  width: 250px;
  height: 6px;
  background: linear-gradient(to right, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.8));
  animation: comet-move 10s linear infinite;
}

@keyframes comet-move {
  0% {
    transform: translate(0, 0) rotate(-30deg); /* Inizia in basso a sinistra e ruota */
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translate(150vw, -150vh) rotate(-30deg); /* Si sposta in alto a destra */
    opacity: 0;
  }
}