body {
  margin: 0;
  background: #0f0f0f;
  font-family: sans-serif;
}

/* título */
.title {
  text-align: center;
  color: white;
  margin-top: 30px;
}

/* galería */
.gallery {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 50px;
  flex-wrap: wrap;
}

.pic {
  width: 200px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.pic:hover {
  transform: scale(1.05);
}

/* lightbox */
#lightbox {
  position: fixed;
  top: 0;
  left: 0;

  width: 100vw;
  height: 100vh;

  background: rgba(0,0,0,0.9);

  display: none;
  justify-content: center;
  align-items: center;

  z-index: 9999;
}

/* imagen */
#lightbox-img {
  max-width: 90%;
  max-height: 90%;

  opacity: 1;
  transition: opacity 0.3s ease;
}

/* cerrar */
.close {
  position: absolute;
  top: 20px;
  right: 30px;

  font-size: 30px;
  color: white;
  cursor: pointer;
}

/* volver */
.back {
  position: absolute;
  top: 20px;
  left: 20px;

  color: white;
  text-decoration: none;
}