.thumbnail-portada {
  position: relative;
  margin-bottom: 5px;
}

.icono-thumbnail {
  position: absolute;
  right: 30px;
  top: 15px;
  color: white;
  opacity: 0.8;
  font-size: 30px;
  z-index: 3;
  text-shadow: 1px 1px 7px rgba(0, 0, 0, 1);
}

.avatar {
  border-radius: 50%;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
  -webkit-box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
  -moz-box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

@media screen and (min-width: 57em) {
  img.size-big,
  .caption-big {
    width: 696px;
  }
}
@media screen and (min-width: 66em) {
  img.size-big,
  .caption-big {
    width: 840px;
  }
}
@media screen and (min-width: 75em) {
  img.size-big,
  .caption-big {
    width: 984px;
  }
}
@media screen and (min-width: 84em) {
  img.size-big,
  .caption-big {
    width: 1128px;
  }
}
@media screen and (min-width: 93em) {
  img.size-big,
  .caption-big {
    width: 1272px;
  }
}

img {
    max-width: 100% !important;
    height: auto;
  }
  
  figure { max-width: 100% !important;
    height: auto;}