body {
  font-family: sans-serif;
  background: #F5F5DC; /* világos háttér */
  color: #333;
  margin: 0;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 30px;
}

header h1 {
  color: #424141;
  font-size: 2em;
  font-weight: bold;
  margin: 0;
}

.gallery .thumbnails img {
  width: 150px;
  margin: 5px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: 0.3s;
}
.gallery .thumbnails img:hover {
  border: 2px solid #fff;
}

.lightbox {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.9);
  justify-content: center;
  align-items: center;
  z-index: 1000;
  display: flex; /* ez a kulcs a középre igazításhoz */
}

.lightbox-img {
  max-width: 90%;
  max-height: 80%;
  box-shadow: 0 0 30px rgba(255,255,255,0.2);
}


.lightbox .close {
  position: absolute;
  top: 20px; right: 30px;
  font-size: 40px;
  cursor: pointer;
}

.nav {
  position: absolute;
  top: 50%;
  font-size: 40px;
  cursor: pointer;
  user-select: none;
  padding: 10px;
  color: #fff;
}
.prev { left: 20px; }
.next { right: 20px; }