* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.product-container {
  max-width: 1400px;
  margin: 0 auto;
  background: white;
  border-radius: 3px;
  box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

/* 2 COLUMN LAYOUT (left main + right sidebar) */
.product-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  padding: 2rem 2rem 2rem 2.5rem;
}

/* LEFT COLUMN */
.product-preview {
  background: #ffffff;
}

.badge-category {
  display: inline-block;
  background: #eef2fa;
  color: #1e4a76;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 30px;
  letter-spacing: 0.3px;
  margin-bottom: 1rem;
}

h1 {
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  color: #0c2e42;
}

.sku-ref {
  font-size: 0.8rem;
  color: #5c6f87;
  border-left: 3px solid #2c7da0;
  padding-left: 0.75rem;
  margin: 0.5rem 0 1rem 0;
}

/* Clinical card with show more/less (previous design) */
.clinical-card {
  background: #f8fafd;
  border-radius: 24px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border: 1px solid #e2edf2;
}
.clinical-card h3 {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #2c7da0;
  margin-bottom: 0.75rem;
}
.clinical-summary {
  font-size: 0.95rem;
  color: #1f3b4c;
  line-height: 1.5;
}
.clinical-full-text {
  display: none;
}
.clinical-full-text.show {
  display: inline;
}
.toggle-clinical-btn {
  background: none;
  border: none;
  color: #2c7da0;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  margin-top: 0.5rem;
  padding: 0.25rem 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.toggle-clinical-btn:hover {
  color: #1f5e7a;
  text-decoration: underline;
}

.feature-list {
  list-style: none;
  margin: 1rem 0;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}

/* SCROLLABLE PDF PREVIEW (multi-page, maintained) */
.pdf-preview-card {
  background: #fefefe;
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.05);
  border: 1px solid #e6edf2;
  margin: 1.2rem 0 1rem;
  overflow: hidden;
}
.pdf-toolbar {
  background: #f1f5f9;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #e2e8f0;
  font-size: 0.75rem;
  color: #2c5f8a;
}
.pdf-scroll-container {
  max-height: 500px;
  overflow-y: auto;
  background: #fafcfd;
}
.pdf-page {
  background: white;
  padding: 1.8rem;
  border-bottom: 1px solid #e9edf2;
  position: relative;
}
.pdf-page:last-child {
  border-bottom: none;
}
.page-marker {
  position: absolute;
  bottom: 12px;
  right: 20px;
  font-size: 0.65rem;
  color: #9aaebf;
  background: white;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}
.pdf-watermark-badge {
  position: absolute;
  top: 12px;
  right: 20px;
  opacity: 0.2;
  font-size: 0.7rem;
  font-weight: bold;
  color: #2c7da0;
}
.preview-note-unlock {
  background: #eef7fc;
  border-radius: 12px;
  padding: 0.75rem;
  margin: 12px;
  text-align: center;
  font-size: 0.75rem;
  color: #1f6e93;
}

/* RIGHT SIDEBAR (previous design) */
.right-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}
.purchase-card {
  background: white;
  border-radius: 28px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.05);
  border: 1px solid #eef2f6;
  padding: 1.5rem;
}
.price {
  font-size: 2.5rem;
  font-weight: 800;
  color: #1f5e3a;
}
.guarantee-badge {
  background: #e9f5ef;
  padding: 0.5rem 0.75rem;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 1.2rem;
}
.btn-primary {
  width: 100%;
  background: #2c7da0;
  color: white;
  padding: 1rem;
  font-weight: 700;
  border: none;
  border-radius: 60px;
  cursor: pointer;
  margin: 1rem 0;
  transition: 0.2s;
}
.btn-primary:hover {
  background: #1f5e7a;
}
.secure-row {
  display: flex;
  justify-content: center;
  gap: 1rem;
  font-size: 0.7rem;
  color: #6a7c8f;
}
.doc-meta {
  background: #f9f9fc;
  border-radius: 20px;
  padding: 1rem;
  margin-top: 1rem;
}
.meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  padding: 0.3rem 0;
}

/* AUTHOR PROFILE CARD (previous design with stats) */
.author-card {
  background: #ffffff;
  border-radius: 24px;
  border: 1px solid #eef2f6;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.02);
}
.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 0.75rem;
  border: 3px solid #2c7da0;
  background: #f0f7fa;
}
.author-name {
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
  color: #1f3e53;
}
.author-title {
  font-size: 0.75rem;
  color: #2c7da0;
  background: #e7f0f5;
  display: inline-block;
  padding: 0.2rem 0.8rem;
  border-radius: 30px;
  margin: 0.5rem 0;
}
.author-bio {
  font-size: 0.8rem;
  color: #4f6f8a;
  margin: 0.7rem 0;
  line-height: 1.4;
}
.author-stats {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin-top: 0.8rem;
  font-size: 0.7rem;
  color: #2c7da0;
  font-weight: 500;
}

/* HORIZONTAL SIMILAR PRODUCTS (3 COLUMN) */
.similar-horizontal-section {
  margin: 2rem 2rem 0rem 2rem;
  padding: 0 0 1rem 0;
}
.similar-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.similar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.sim-card {
  background: #ffffff;
  border: 1px solid #eef2f8;
  border-radius: 20px;
  padding: 1rem;
  transition: 0.2s;
  box-shadow: 0 2px 6px rgba(0,0,0,0.02);
  cursor: pointer;
}
.sim-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 20px rgba(0,0,0,0.05);
  border-color: #cde3ec;
}
.sim-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}
.sim-card h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0.5rem 0 0.2rem;
}
.sim-price {
  font-weight: 800;
  color: #1f5e3a;
  font-size: 0.9rem;
}
.sim-rating {
  font-size: 0.7rem;
  color: #f5b042;
  margin: 4px 0;
}

/* WHY STUDENTS CHOOSE US */
.why-choose {
  margin: 2rem 2rem 1.5rem 2rem;
  background: #fafdff;
  border-radius: 28px;
  padding: 2rem;
  border: 1px solid #eaf0f5;
}
.why-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  text-align: center;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}
.why-item {
  text-align: center;
  padding: 0.5rem;
}
.why-icon {
  font-size: 2rem;
  background: #e9f2f7;
  width: 55px;
  height: 55px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 60px;
  margin: 0 auto 1rem;
  color: #2c7da0;
}
.why-item h4 {
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.why-item p {
  font-size: 0.8rem;
  color: #5a6f85;
}

/* FAQ SECTION - PREVIOUS DESIGN (compact, border-bottom style) */
.faq-section {
  background: #ffffff;
  border-top: 1px solid #eef2f2;
  padding: 2rem 2.5rem;
}
.faq-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.faq-item {
  margin-bottom: 1rem;
  border-bottom: 1px solid #ecf3f5;
  padding-bottom: 0.75rem;
}
.faq-question {
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.faq-answer {
  font-size: 0.9rem;
  color: #405d72;
}

.trust-footer {
  background: #fafcff;
  padding: 1rem 2.5rem 1.8rem;
  font-size: 0.75rem;
  text-align: center;
  color: #6d8aab;
  border-top: 1px solid #eef2f2;
}

@media (max-width: 950px) {
  .product-grid {
    grid-template-columns: 1fr;
    padding: 1.5rem;
  }
  .similar-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .why-grid {
    grid-template-columns: 1fr;
  }
  .faq-section {
    padding: 1.5rem;
  }
}