/* Navbar */
header {
  width: 100%;
  background: #111;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 60px;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #fff;
}

.nav-links {
  list-style: none;
  display: flex;
}

.nav-links li {
  margin-left: 30px;
}

.nav-links a {
  text-decoration: none;
  color: #fff;
  font-weight: 500;
  transition: 0.3s;
}

.nav-links a:hover {
  color: #00adb5;
}


/* Portfolio Page - Full Page Gallery */
.portfolio.fullpage {
  padding: 80px 0 0; /* keep space for navbar */
  background: #000;
}

.portfolio-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: 100%;
}

.portfolio-item {
  position: relative;
  width: 100%;
  height: 100vh; /* each item fills screen height */
  overflow: hidden;
}

.portfolio-item img,
.portfolio-item iframe {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: none;
}

/* Overlay effect */
.overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.5);
  color: #fff;
  text-align: center;
  padding: 20px;
  font-size: 1.5rem;
  opacity: 0;
  transition: 0.4s ease-in-out;
}

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