:root {
  --bg: #fff;
  --fg: #222;
  --accent: #007acc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111;
    --fg: #eee;
    --accent: #46c;
  }
}
/* Explicit “.dark” toggle override */
html.dark {
  --bg: #111;
  --fg: #eee;
  --accent: #46c;
}
body {
  margin: 0;
  font-family: sans-serif;
  background-color: var(--bg);
  color: var(--fg);
}
.lightbox-open {
  overflow: hidden;
}
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg);
  border-bottom: 1px solid #ccc;
}
.emoji-button {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--accent);
}
.gallery-grid {
  column-count: 1;
  column-gap: 1rem;
  padding: 1rem;
}
@media (min-width: 768px) {
  .gallery-grid { column-count: 2; }
}
@media (min-width: 1024px) {
  .gallery-grid { column-count: 3; }
}
.gallery-item {
  margin: 0 0 1rem;
  position: relative;
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  display: block;
  border-radius: 8px;
}
.gallery-item figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 0.5rem;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity 0.2s;
}
.gallery-item:focus figcaption,
.gallery-item:hover figcaption {
  opacity: 1;
}
#lightbox {
  position: fixed;
  top:0; left:0; right:0; bottom:0;
  background: rgba(0,0,0,0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s;
}
#lightbox[aria-hidden="false"] {
  visibility: visible;
  opacity: 1;
}
#lb-content img,
#lb-content video {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 8px;
}
#lb-caption {
  color: #fff;
  margin-top: 0.5rem;
  text-align: center;
  max-width: 90vw;
}
#lb-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
}