header.fixed-top + main {
  padding-top: calc(2rem + 56px);
}

.ac-app-nav {
  background-color: var(--ac-nav-bg);
}

/* Lightbox */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox-image {
  max-height: 90vh;
  max-width: 90vw;
  object-fit: contain;
  border-radius: 4px;
}

/* Upload video preview */
.video-preview {
  max-height: 120px;
  border-radius: 8px;
}

/* Post photo thumbnail */
.post-photo {
  max-height: 165px;
  object-fit: cover;
  cursor: pointer;
}

/* Post video — natural aspect ratio, height-constrained */
.post-video {
  max-height: 250px;
  width: auto;
}