/* Mobile Navigation */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--background);
  z-index: 999;
  padding: 20px;
  overflow-y: auto;
}

.mobile-nav.active {
  display: block;
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-nav a {
  font-size: 1.2rem;
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .header-actions .btn {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .article-title {
    font-size: 1.5rem;
  }

  .hero-section {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
    margin-bottom: 30px;
  }

  .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }

  .article-content table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}