.lightbox {
  display: none;
  position: fixed;
  z-index: 9999;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.8);
  text-align: center;
  /* Flexbox for centering */
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox img {
  max-width: 90vw;
  max-height: 80vh;
  margin: 0;
  box-shadow: 0 2px 16px #0005;
  background: #fff;
  border-radius: 8px;
  display: block;
}
.lightbox .spinner {
  border: 6px solid #f3f3f3;
  border-top: 6px solid #3498db;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 10002;
  background: transparent;
}
@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}
.close {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 3em;
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  z-index: 10001;
}
.thumbnail {
  max-width: 180px;
}
.thumbnail-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
}
body {
  background-color: #fbffdd;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
h1 {
  font-size: 3rem;
  color: peru;
  font-family: "Berkshire Swash", cursive;
  text-align: center;
}