.header-intro {
  height: 100vh;
  background: url('../resources/3.jpeg') no-repeat center center/cover;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  z-index: 2;
}

.header-intro::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
}

.header-content {
  position: relative;
  z-index: 1;
}

.header-title {
  font-size: 10rem;
  margin-bottom: 20px;
  animation: fadeInDown 2s ease-out;
}

.header-subtitle {
  font-size: 1.5rem;
  margin-bottom: 40px;
  animation: fadeInUp 2s ease-out;
}

.header-quote {
  font-size: 1.2rem;
  font-style: italic;
  margin-bottom: 10px;
  animation: fadeInUp 2s ease-out;
}

.header-author {
  font-size: 1rem;
  animation: fadeInUp 2s ease-out;
}

@keyframes fadeInDown {
  0% {
    opacity: 0;
    transform: translateY(-20px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Media Queries */
@media (max-width: 768px) {
  .book-image {
    width: 100%;
    height: auto;
    margin: 10px 0;
  }

  .book-content {
    padding: 10px;
  }

  .highlight::before {
    height: 110%;
  }

  .hover-title {
    font-size: 2rem;
  }

  .hover-description {
    font-size: 1rem;
  }

  .buy-button {
    padding: 10px 20px;
    font-size: 1rem;
  }

  .header-title {
    font-size: 5rem;
  }

  .header-subtitle {
    font-size: 1rem;
  }

  .header-quote {
    font-size: 0.9rem;
  }

  .header-author {
    font-size: 0.8rem;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .book-image {
    width: 50%;
    height: auto;
    margin: 20px;
  }

  .highlight::before {
    height: 115%;
  }

  .hover-title {
    font-size: 2.5rem;
  }

  .hover-description {
    font-size: 1rem;
  }

  .buy-button {
    padding: 12px 24px;
    font-size: 1.1rem;
  }

  .header-title {
    font-size: 7rem;
  }

  .header-subtitle {
    font-size: 1.2rem;
  }

  .header-quote {
    font-size: 1rem;
  }

  .header-author {
    font-size: 0.9rem;
  }
}