body {
  background-image: url('../img/sima-hall.jpg');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  background-color: #051;
  color: white;
  font-size: 5rem;
  text-align: center;
}

.logo {
  animation: logo-spin infinite 20s linear;
}

@keyframes logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}