body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
}

header {
    background-color: #333;
    color: #fff;
    padding: 10px 0;
    border-bottom: 4px solid #444;
}

nav {
    display: flex;
    justify-content: center;
    align-items: center;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

nav a {
    color: #fff;
    text-decoration: none;
    padding: 10px 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    display: inline-block;
    position: relative;
}

nav a:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}


.logo {
    height: 40px;
    margin-right: 20px;
}

/* Gallery grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  padding: 20px;
}

.gallery img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.3s;
}

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

/* Lightbox overlay */
.lightbox {
  display: none;
  position: fixed;
  z-index: 1000;
  padding-top: 60px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: rgba(0,0,0,0.9);
}

.lightbox img {
  margin: auto;
  display: block;
  max-width: 80%;
  max-height: 80%;
}

/* Close button */
.lightbox .close {
  position: absolute;
  top: 20px;
  right: 35px;
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  cursor: pointer;
}

/* Arrows */
.lightbox .prev,
.lightbox .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 20px;
  margin-top: -50px;
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
  user-select: none;
}

.lightbox .prev { left: 0; }
.lightbox .next { right: 0; }

.lightbox .prev:hover,
.lightbox .next:hover,
.lightbox .close:hover {
  color: #bbb;
}