/* General Reset */
body, html {
  margin: 0; padding: 0;
  font-family: 'Segoe UI', sans-serif;
  color: #fff; height: 100%; overflow-x: hidden;
}

/* Slideshow background */
.slideshow {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: -2;
}
.slideshow img {
  width: 100%; height: 100%; object-fit: cover;
  position: absolute; top: 0; left: 0;
  opacity: 0; transition: opacity 1s ease-in-out;
}
.slideshow img.active { opacity: 1; }

.overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.6); z-index: -1;
}

/* Navigation */
nav ul {
  display: flex; list-style: none;
  justify-content: center; gap: 20px;
  background: rgba(0,0,0,0.7); padding: 15px;
  margin: 0;
}
nav ul li a {
  color: #fff; text-decoration: none; font-weight: bold;
  transition: color 0.3s;
}
nav ul li a:hover, nav ul li a.active { color: #00aaff; }

/* Main content */
main {
  text-align: center;
  margin-top: 100px;
  padding: 20px;
}

/* Footer */
footer {
  position: fixed; bottom: 10px; width: 100%;
  text-align: center; font-size: 14px; color: #fff;
}