html, body {
  height: 100%;
  margin: 0;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
.blink {
  animation: blink 2.5s infinite;
}
.bg-full {
  background: url('assets/images/fondo.jpeg') no-repeat center center fixed;
  background-size: cover;
  height: 100%;
}