@media (max-width: 620px) {
  :root {
    --font-lg: 18px;
    --font-xl: 20px;
    --font-xxl: 28px;
    --space-lg: 24px;
    --space-xl: 32px;
  }
  body.no-scroll {
    overflow: hidden;
  }

  .hero {
    min-height: 100vh;
    text-align: center;
    background: var(--bg-dark) url("../Images/imageFront.png") no-repeat center;
    background-size: cover;
    background-position: center bottom;
    background-repeat: no-repeat;
    overflow: hidden;
  }

  .navbar .container {
    padding: 1rem 1.6rem;
  }

  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .nav-mobile {
    right: 1.6rem;
  }

  .hero-content {
    padding-top: 40px;
  }
  .hero-title {
    font-size: var(--font-xxl);
  }
  .hero-subtitle {
    font-size: 16px;
    margin-bottom: var(--space-md);
  }
  .nav-links {
    gap: 1rem;
  }
  .nav-links a {
    font-size: 1rem;
    gap: 0.5rem;
  }
  .overview-title {
    font-size: 22px;
  }
  .overview-cards {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
  }

  .problem-title {
    font-size: 22px;
  }
  .problem-subtitle {
    font-size: 16px;
  }
  .problem-box {
    padding: var(--space-md);
  }
  .problem-box p {
    font-size: 15px;
  }

  .process-title {
    font-size: 22px;
  }
  .process-subtitle {
    font-size: 15px;
  }
  .process-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .research-title {
    font-size: 22px;
  }
  .research-desc {
    font-size: 15px;
  }
  .question-card {
    font-size: 15px;
  }

  .persona-info {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
    justify-content: center;
  }
  .personas-title {
    font-size: 22px;
  }
  .persona-section ul {
    font-size: 14px;
  }
  .architecture-title {
    font-size: 22px;
  }
  .architecture-subtitle {
    font-size: 15px;
  }
  .step-grid {
    grid-template-columns: 1fr;
  }

  .wireframes-title {
    font-size: 22px;
  }
  .wireframes-subtitle {
    font-size: 15px;
  }
  .wireframe-grid {
    grid-template-columns: 1fr;
  }
  .wireframe-impact h3 {
    font-size: 20px;
  }
  .wireframe-impact p {
    font-size: 15px;
  }
  .mid-title {
    font-size: 22px;
  }
  .mid-subtitle {
    font-size: 15px;
  }
  .mid-grid {
    grid-template-columns: 1fr;
  }
  .mid-impact h3 {
    font-size: 20px;
  }
  .mid-impact p {
    font-size: 15px;
  }
  .high-title {
    font-size: 22px;
  }
  .high-subtitle {
    font-size: 15px;
  }
  .high-grid {
    grid-template-columns: 1fr;
  }
  .high-impact h3 {
    font-size: 20px;
  }
  .high-card img {
    height: 260px;
  }
  .high-impact p {
    font-size: 15px;
  }
  .feedback-title {
    font-size: 22px;
  }
  .feedback-subtitle {
    font-size: 15px;
  }
  .feedback-impact h3 {
    font-size: 20px;
  }
  .feedback-impact p {
    font-size: 15px;
  }
  .final-title {
    font-size: 22px;
  }
  .final-subtitle {
    font-size: 15px;
  }
  .summary-card h3 {
    font-size: 18px;
  }

  body section {
    padding: 3rem 0.8rem !important;
  }
}