/* Navigation Styles */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  z-index: 120;
  background: transparent;
  border-bottom: none;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav.nav-scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(14px);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
  padding: 0 2rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

.nav-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.nav-actions .btn {
  padding: 0.55rem 1.3rem;
  font-size: 0.95rem;
}

.nav-actions .btn-ghost {
  font-weight: 600;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  background: rgba(241, 245, 249, 0.9);
  border: 1px solid rgba(15, 23, 42, 0.16);
  color: var(--text);
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border 0.3s ease;
}

.mobile-menu-toggle span {
  width: 18px;
  height: 2px;
  background: currentColor;
  display: block;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-menu-toggle.open span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.mobile-menu-toggle.open span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.nav.nav-contrast:not(.nav-scrolled) .nav-brand,
.nav.nav-contrast:not(.nav-scrolled) .nav-links a,
.nav.nav-contrast:not(.nav-scrolled) .nav-actions .btn-ghost {
  color: #fff;
}

.nav.nav-contrast:not(.nav-scrolled) .nav-links a:hover,
.nav.nav-contrast:not(.nav-scrolled) .nav-actions .btn-ghost:hover {
  color: rgba(255, 255, 255, 0.85);
}

.nav.nav-contrast:not(.nav-scrolled) .mobile-menu-toggle {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.15);
}

.nav.nav-scrolled .mobile-menu-toggle {
  color: var(--text);
  border-color: rgba(15, 23, 42, 0.2);
  background: rgba(241, 245, 249, 0.9);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 1.25rem;
  }

  .nav-links {
    display: none;
  }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: absolute;
    top: 72px;
    left: 1rem;
    right: 1rem;
    padding: 1.5rem;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.15);
    border: 1px solid rgba(226, 232, 240, 0.9);
  }

  .nav-links.mobile-open a {
    color: var(--text);
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .nav-actions {
    display: flex;
  }

  .nav-actions .btn-primary {
    padding: 0.45rem 1rem;
    font-size: 0.9rem;
    border-radius: 999px;
  }

  .nav-actions .btn-ghost {
    padding: 0.35rem 0.5rem;
    font-size: 0.9rem;
  }
}