main {margin-top: 100px; flex: 1; width: 100%; padding: 0;}

.banner {
  width: 100%;
  height: 300px;
  background: url('../../../pictures/galerie/basstoelpel-anflug.jpg') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-shadow: 0 2px 6px rgba(0,0,0,0.6);
  font-size: 2.8rem;
  font-weight: bold;
  margin-bottom: 40px;
}


.filter-menu {
  text-align: center;
  margin: 40px 0 20px;
}

.filter-btn {
  background: none;
  border: 2px solid var(--accent-green);
  color: var(--accent-green);
  padding: 8px 16px;
  margin: 5px;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 500;
  transition: all .3s ease;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--accent-green);
  color: #fff;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  grid-auto-rows: 200px;
  gap: 10px;
  padding: 10px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item.large {grid-column: span 2; grid-row: span 2;}
.gallery-item.wide {grid-column: span 2;}
.gallery-item.tall {grid-row: span 2;}

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  justify-content: center;
  align-items: center;
  z-index: 200;
}

.lightbox.active {display: flex;}

.lightbox img {
  max-width: 90%;
  max-height: 80%;
  border-radius: var(--radius);
}

.lightbox .nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  padding: 10px;
  user-select: none;
}

.lightbox .prev {left: 20px;}
.lightbox .next {right: 20px;}

.lightbox .close {
  position: absolute;
  top: 30px;
  right: 40px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
}