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

html, body {
  height: 100%;
  overflow: hidden;
  background: #1a1a1a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.gallery {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  touch-action: pan-y;
}

.slides {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: center;
}

.slide {
  min-width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  user-select: none;
  -webkit-user-drag: none;
}

.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  font-size: 2.5rem;
  width: 50px;
  height: 80px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.35);
}

.nav-btn.prev {
  left: 12px;
}

.nav-btn.next {
  right: 12px;
}