*, *::after, *::before {
    border: 0;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background-size:cover;
    animation: fadeInAnimation ease 2s;
    animation-iteration-count: 1;
    animation-fill-mode: forwards;
}

@keyframes fadeInAnimation {
    0% {
      opacity: 0;
    }
  
    100% {
      opacity: 1;
    }
  }

.regreso {
  position: fixed;
  cursor: pointer;
  background: none;
  transform: scale(0.5);
  right: -5px;
  top: -10px;
  z-index: 1;
}

.contenedor-fondo {
    display: flex;
}

.fondo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.container {
    max-width: 1200px;
    display: flex;
    margin: auto;
}

.image-container {
    display: flex;
    align-items: center;
    width: 100%;
    justify-content: center;
}

.portada {
    width: 100%;
}