.ebook-section {
  padding: 120px 0 80px;
}

.ebook-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 3rem;
  text-align: center;
}

.ebook-card {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  margin-bottom: 30px;
  transition: transform 0.3s;
}

.ebook-card:hover {
  transform: translateY(-5px);
}

.ebook-cover {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.ebook-content {
  padding: 25px;
}

.ebook-card-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 15px;
}

.ebook-description {
  color: #666;
  margin-bottom: 20px;
}

.download-btn {
  background: #34bec1;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  transition: background 0.3s;
}

.download-btn:hover {
  background: #2a9a9d;
  color: white;
}

.ebook-detail-section {
  padding: 120px 0 80px;
}

.ebook-detail-card {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.ebook-cover-large {
  width: 100%;
  max-width: 300px;
  border-radius: 15px;
  margin-bottom: 30px;
}

.ebook-detail-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 20px;
}

.ebook-detail-description {
  font-size: 1.1rem;
  color: #555;
  line-height: 1.8;
  margin-bottom: 40px;
}

.download-form {
  background: #f8f9fa;
  padding: 30px;
  border-radius: 15px;
  max-width: 400px;
}

.download-form h4 {
  color: #2c3e50;
  margin-bottom: 20px;
}

.form-input {
  border: 2px solid #e9ecef;
  border-radius: 10px;
  padding: 12px 15px;
  width: 100%;
  margin-bottom: 20px;
}

.form-input:focus {
  border-color: #34bec1;
  outline: none;
}

.download-submit-btn {
  background: #34bec1;
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 25px;
  font-weight: 500;
  width: 100%;
  transition: background 0.3s;
}

.download-submit-btn:hover {
  background: #2a9a9d;
}

.newsletter-checkbox {
  margin-bottom: 15px;
}

.newsletter-checkbox input {
  margin-right: 10px;
}

.expired-section {
  padding: 120px 0 80px;
  text-align: center;
}

.expired-card {
  background: white;
  border-radius: 20px;
  padding: 60px 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  margin: 0 auto;
}

.expired-icon {
  font-size: 4rem;
  color: #e74c3c;
  margin-bottom: 30px;
}

.expired-title {
  font-size: 2rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 20px;
}

.expired-message {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 30px;
  line-height: 1.6;
}

.retry-btn {
  background: #34bec1;
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  transition: background 0.3s;
}

.retry-btn:hover {
  background: #2a9a9d;
  color: white;
}