@media (max-width: 480px) {
  body {
    padding: 0.8rem;
  }
  h1 {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }

  .lesson-header p {
    font-size: 1rem;
    margin-bottom: 0;
  }

  .lesson-header img {
    width: 120px;
  }

  .author-detail p {
    font-size: 0.8rem;
  }
  .screenshot-section {
    padding: 1rem 1rem 0.5rem 1rem;
  }
  .lesson-card {
    border-radius: 1rem;
  }
  .book-icon {
    display: none;
  }
  .lesson-tag {
    font-size: 0.7rem;
  }
  .audio-player-wrapper {
    gap: 0.4rem;
    border-radius: 1rem;
    padding: 0.7rem;
  }
  .audio-section {
    padding: 1rem;
    gap: 1.2rem;
  }
  .duration {
    padding: 0.3rem;
    border-radius: 50%;
    font-size: 0.5rem;
  }
  audio {
    height: 30px;
    border-radius: 30px;
  }

  .download-link {
    gap: 0;
    padding: 0.4rem;
    font-size: 0.8rem;
    justify-content: center;
    margin-left: 0;
  }
  .lesson-description {
    font-size: 0.7rem;
    line-height: 1.3;
    margin-top: 0;
    padding-left: 0.4rem;
  }
  .screenshot-thumb {
    flex: 0 0 80%;
    min-width: 180px;
  }
  .lightbox-close {
    top: -35px;
    right: 5px;
    width: 35px;
    height: 35px;
    font-size: 1.5rem;
  }
  .slider-btn {
    width: 36px;
    height: 36px;
    font-size: 1.3rem;
  }
  .slider-btn.prev {
    left: 6px;
  }
  .slider-btn.next {
    right: 6px;
  }
}