/* Navigation */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s ease;
}

nav.scrolled {
  background: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
}

.logo {
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--black);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--spacing-sm);
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--black);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

/* Buttons */
.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--black);
  color: var(--white);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all 0.3s ease;
  border: 1px solid var(--black);
}

.cta-button:hover {
  background: transparent;
  color: var(--black);
}

.product-cta {
  display: inline-block;
  padding: 0.75rem 2rem;
  border: 1px solid var(--black);
  color: var(--black);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all 0.3s ease;
}

.product-cta:hover {
  background: var(--black);
  color: var(--white);
}

.submit-button {
  padding: 1rem 2.5rem;
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--white);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
  align-self: center;
}

.submit-button:hover {
  background: transparent;
  color: var(--white);
}

/* Cards */
.highlight-card {
  padding: var(--spacing-md);
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  opacity: 0;
  transform: translateY(30px);
}

.highlight-card.visible {
  animation: fadeInUp 0.6s ease forwards;
}

.highlight-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0,0,0,0.08);
}

.highlight-card h3 {
  margin-bottom: var(--spacing-xs);
  font-weight: 400;
}

/* Footer */
footer {
  background: var(--black);
  color: var(--warm-gray);
  padding: var(--spacing-md);
  text-align: center;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    padding: var(--spacing-sm);
  }

  .nav-links {
    gap: 1rem;
  }
}