header {
  background-color: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  max-width: 1400px;
  margin: 0 auto;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  font-family: monospace, sans-serif;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.8);
}

.logo i {
  margin-right: 10px;
  color: #00ffff;
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

nav {
  position: relative;
  z-index: 1;
}

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

nav li {
  margin-left: 1.5rem;
  position: relative;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: all 0.3s ease;
  font-family: monospace, sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
}

nav a:after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #00ffff, #ff00ff);
  transition: all 0.3s ease;
  box-shadow: 0 0 5px rgba(0, 255, 255, 0.5), 0 0 10px rgba(255, 0, 255, 0.5);
}

nav a:hover {
  color: #00ffff;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.8);
}

nav a:hover:after {
  width: 100%;
}

.active-link {
  color: #00ffff;
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.8);
}

.active-link:after {
  width: 100%;
}