/* ── NAV ── */
header {
  background: rgba(0, 5, 10, 0.9);
  padding: 10px 0;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  backdrop-filter: blur(9px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: #6FFFE9;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  font-size: 20px;
}

nav ul li a {
  text-decoration: none;
  color: #f7f4f4;
  font-weight: 500;
  padding: 8px 15px;
  border-radius: 5px;
  transition: all 0.3s ease;
}

nav ul li a:hover {
  background: #1a3a3a;
  color: #6FFFE9;
}