* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #111;
  color: #fff;
}

/* Gallery Grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  padding: 20px;
}

@media (max-width: 992px) {
  .gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .gallery {
    grid-template-columns: repeat(1, 1fr);
  }
}

.gallery-item {
  position: relative;
  width: 100%;
  padding-top: 66.66%; /* 3:2 ratio */
  overflow: hidden;
  cursor: pointer;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.gallery-item img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  top: 0;
  left: 0;
  border-radius: 10px;
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from {opacity: 0;}
  to {opacity: 1;}
}

.lightbox-image-wrapper {
  width: 90vw;
  aspect-ratio: 3 / 2;
  max-width: 1000px;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  animation: scaleUp 0.3s ease-in-out;
}

@keyframes scaleUp {
  from {transform: scale(0.9); opacity: 0;}
  to {transform: scale(1); opacity: 1;}
}

.lightbox img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 10px;
}

.arrow {
  color: #fff;
  font-size: 40px;
  cursor: pointer;
  padding: 20px;
  user-select: none;
}

.arrow:hover {
  color: #ccc;
}

.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 30px;
  color: white;
  cursor: pointer;
  z-index: 1001;
}

.close-btn:hover {
  color: #ccc;
}