header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  z-index: 1000;
  padding: 1rem 0;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

nav ul {
  display: flex;
  gap: 2rem;
}

nav a {
  font-weight: 600;
  color: var(--black);
}

nav a:hover {
  color: var(--primary);
}

footer {
  background: var(--black);
  color: var(--white);
  padding: 4rem 0 2rem;
}

footer .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

footer h4 {
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
  color: var(--secondary);
}

footer p, footer li {
  color: var(--gray-medium);
  margin-bottom: 0.8rem;
}

.copyright {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.9rem;
  color: var(--gray-dark);
}

.copyright a {
  color: var(--secondary);
}

@media (max-width: 768px) {
  nav {
    display: none; /* Hide on mobile for simplicity in this example, or add a hamburger */
  }
}