body { font-family: sans-serif; background: #fafafa; margin: 0; padding: 16px; }
h1 { margin-bottom: 16px; font-size: 1.4rem; }

.gallery {
margin-top:10px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
}

.gallery-item {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #eee;
  cursor: pointer;
}

.gallery-item img,
.gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Disabled state */
#prevBtn:disabled,
#nextBtn:disabled {
  background: #ccc;
  cursor: not-allowed;
}

/* Modal styles */
.modal {
  display: none;
  position: fixed;
  z-index: 999;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.8);
  justify-content: center;
  align-items: center;
}
.modal-content {
  background: #fff;
  border-radius: 8px;
  max-width: 90%;
  max-height: 90%;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.modal-content img,
.modal-content video {
  max-width: 100%;
  max-height: 70vh;
  margin-bottom: 10px;
}
.modal-buttons {
  display: flex;
  gap: 8px;
}
.modal-buttons a {
  display: inline-block;
  padding: 8px 14px;
  background: #0078d4;
  color: white;
  border-radius: 4px;
  text-decoration: none;
}
.modal-buttons a.download {
  background: #28a745; /* green for download */
}
.close-btn {
  position: absolute;
  top: 10px; right: 20px;
  font-size: 2rem;
  color: white;
  cursor: pointer;
}


.bottom-center button:hover,.bottom-center label:hover{
  background-color: #0056b3;
}

.bottom-center {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: stretch;   /* stretch children to same height */
}

.bottom-center button,
.bottom-center label {
  border: none;
  background-color: #007bff;
  color: white;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  font-size: 12px;
  display: flex;          /* normalize label/button */
  align-items: center;    /* center text vertically */
}