* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}


header {
  background: green;
  padding: 15px 0;
}

body {
  background-color: black;
}

nav {
  width: 90%;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: black;
}

nav h2 {
  color: black;
  font-size: 22px;
  font-weight: bold;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 25px;   
}

nav ul li a {
  text-decoration: none;
  color: blue;
  font-size: 16px;
  transition: 0.3s;
}

nav ul li a:hover,
nav ul li .active {
  color: black;
}


.gallery {
  width: 90%;
  margin: 40px auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s;
}


.gallery-item:hover img {
  transform: scale(1.1);
}


.overlay {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 10px;
  background: rgba(0,0,0,0.6);
  color: white;
  text-align: center;
  font-weight: bold;
  font-size: 16px;
  opacity: 0;
  transition: 0.4s;
}


.gallery-item:hover .overlay {
  opacity: 1;
}


.lightbox {
  display: none; 
  position: fixed;
  z-index: 1000;
  padding-top: 100px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
}

.lightbox-content {
  display: block;
  margin: auto;
  max-width: 80%;
  border-radius: 10px;
}

.close {
  position: absolute;
  top: 40px;
  right: 60px;
  color: white;
  font-size: 40px;
  cursor: pointer;
}

#caption {
  text-align: center;
  margin-top: 15px;
  color: black;
  font-size: 18px;
}

footer {
  background: green;
  color: white;
  text-align: center;
  padding: 25px 0;
  margin-top: 50px;
}

footer p {
  font-size: 15px;
}

footer a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}

footer a:hover {
  color: #00aaff;
}

@media(max-width: 700px){
  nav {
    flex-direction: column;
    gap: 15px;
  }

  nav ul {
    flex-wrap: wrap; 
    justify-content: center;
  }
}