@media (max-width: 960px) {
  .hero-grid,
  .two-col,
  .contact-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .footer-wrap {
    grid-template-columns: 1fr 1fr;
  }

  .course-grid,
  .feature-grid,
  .testimonial-grid,
  .team-grid,
  .curriculum-grid,
  .program-grid,
  .career-grid,
  .step-grid,
  .achievement-grid,
  .partner-badges,
  .why-cards {
    grid-template-columns: 1fr 1fr;
  }

  .certification-grid,
  .demo-course-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .main-nav {
    position: absolute;
    top: 76px;
    left: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.97);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: 18px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 20px;
  }

  .main-nav.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }
}

@media (max-width: 640px) {
  .footer-wrap,
  .course-grid,
  .feature-grid,
  .testimonial-grid,
  .team-grid,
  .curriculum-grid,
  .demo-course-grid,
  .program-grid,
  .career-grid,
  .step-grid,
  .achievement-grid,
  .partner-badges,
  .certification-grid,
  .journey-row {
    grid-template-columns: 1fr;
  }

  .why-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .nav-wrap {
    min-height: 70px;
    gap: 12px;
  }

  .nav-actions {
    gap: 8px;
  }

  .nav-actions .btn {
    width: auto;
    flex: 0 0 auto;
    padding: 10px 12px;
    white-space: nowrap;
  }

  .cta-wrap {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 22px;
  }

  .hero:not(.landing-hero) {
    padding-top: 68px;
  }

  .landing-hero.hero-bleed {
    min-height: min(88vh, 680px);
  }

  .hero-media {
    overflow: clip;
  }

  .hero-content h1 {
    font-size: 2.4rem;
  }

  .hero-stats {
    gap: 14px;
  }

  .btn,
  .more-courses-btn,
  .demo-enroll-btn,
  .course-card-link {
    width: 100%;
  }

  .hero-actions,
  .detail-actions,
  .demo-card-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .course-detail-summary {
    max-width: 100%;
  }

  .certification-wrap {
    grid-template-columns: minmax(0, 1fr);
  }

  .certification-copy,
  .certification-grid {
    min-width: 0;
  }

  .certification-title {
    font-size: clamp(1.9rem, 8vw, 2.5rem);
  }

  .achievement-header h2 {
    font-size: clamp(1.8rem, 7vw, 2.4rem);
  }

  .detail-price-row {
    flex-direction: column;
    align-items: flex-start;
  }
}