body {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: #fca0a0;
  overflow: hidden;
  padding: 0;
  flex-direction: column;


  background-color: #fdadadf3;
  background-repeat: no-repeat;
  background-position: center;
}

.contenedor {
  height: 100vh;
  overflow-y: auto; 
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  position: relative;
}

#imagen-abajo {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  z-index: 1;
}

#imagen-arriba {
  width: 100%;
  height: auto;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  cursor: pointer;
  transition: opacity 0.5s ease; /* animación de fade */
}

#footer {
    padding: 30px;
    background-color: #fca0a0;
    display: flex;
    margin-top: 30px;
}