body {
  margin: 0;
  background-color: #002147; /* azul marino */
  overflow: hidden;
}

.container {
  position: relative;
  width: 100vw;
  height: 100vh;
}

.mundo {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: radial-gradient(#0066cc, #001933);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 60px #0066cc;
}

.avion {
  position: absolute;
  width: 60px;
  top: 80%;
  left: -10%;
  transition: transform 1s ease;
}

.titulo {
  position: absolute;
  bottom: 30px;
  width: 100%;
  text-align: center;
  color: white;
  font-family: 'Segoe UI', sans-serif;
  font-size: 3rem;
  letter-spacing: 4px;
  opacity: 0;
  animation: fadeIn 2s ease forwards;
  animation-delay: 3s;
}

.salida {
  animation: deslizarSalida 1s forwards;
}

@keyframes deslizarSalida {
  to {
    transform: translateX(-100%);
    opacity: 0;
  }
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}