/* Past paper mark-scheme / product detail page */

.ms-page {
  background: var(--bg);
  padding-bottom: 0;
}

.ms-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.ms-breadcrumb {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.5;
}

.ms-breadcrumb a {
  color: var(--blue);
  text-decoration: none;
}

.ms-breadcrumb a:hover {
  text-decoration: underline;
}

.ms-breadcrumb-sep {
  margin: 0 8px;
  color: #94a3b8;
}

.ms-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  align-items: start;
  margin-bottom: 48px;
}

.ms-hero {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 36px 36px;
  box-shadow: var(--shadow);
}

.ms-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 400;
  color: var(--navy);
  margin: 0 0 12px;
  line-height: 1.2;
}

.ms-digital-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--teal-light);
  color: #047857;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 999px;
  border: 1px solid #6ee7b7;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.ms-digital-badge i {
  font-size: 0.875rem;
}

.ms-hero-body {
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 32px;
  align-items: start;
}

.ms-product-preview {
  max-width: 280px;
  margin: 0 auto;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
}

.ms-product-preview:hover {
  transform: none;
}

.ms-product-preview .paper-card-maths-download {
  pointer-events: none;
}

.ms-hero-copy {
  min-width: 0;
}

.ms-hero-intro {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 0 24px;
  line-height: 1.6;
}

.ms-benefits {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ms-benefit {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.ms-benefit-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #f0f7ff;
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.ms-benefit-title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.ms-benefit-desc {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Purchase sidebar */
.ms-purchase {
  position: sticky;
  top: 88px;
  background: var(--bg-white);
  border: 1px solid #c5d9f5;
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow);
}

.ms-purchase-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--teal-light);
  color: #047857;
  font-size: 0.6875rem;
  font-weight: 800;
  border-radius: 6px;
  border: 1px solid #6ee7b7;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.ms-purchase-price {
  text-align: center;
  margin-bottom: 20px;
}

.ms-purchase-price-amount {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 6px;
}

.ms-purchase-price-amount--free {
  color: var(--teal);
}

.ms-purchase-price-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 600;
}

.ms-purchase-perks {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border);
}

.ms-purchase-perk {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  max-width: 90px;
  line-height: 1.25;
}

.ms-purchase-perk i {
  font-size: 1.125rem;
  color: var(--blue);
}

.ms-purchase-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 18px;
}

.ms-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 14px 20px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  box-sizing: border-box;
}

.ms-btn-cart {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.35);
}

.ms-btn-cart:hover {
  background: var(--blue-dark);
  color: #fff;
  transform: translateY(-1px);
}

.ms-btn-in-cart {
  background: var(--teal);
  color: #fff;
  pointer-events: none;
}

.ms-btn-preview {
  background: #fff;
  color: var(--blue);
  border: 2px solid var(--blue);
}

.ms-btn-preview:hover {
  background: #f0f7ff;
  color: var(--blue);
  text-decoration: none;
}

.ms-bundle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  margin-bottom: 20px;
  transition: border-color 0.2s, background 0.2s;
}

.ms-bundle:hover {
  border-color: #b8d4f0;
  background: #f8fbff;
  text-decoration: none;
  color: inherit;
}

.ms-bundle strong {
  display: block;
  font-size: 0.875rem;
  color: var(--navy);
  margin-bottom: 2px;
}

.ms-bundle span {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.ms-bundle i {
  color: var(--text-muted);
  flex-shrink: 0;
}

.ms-rating {
  text-align: center;
  margin-bottom: 16px;
}

.ms-rating-stars {
  color: #fbbf24;
  font-size: 0.875rem;
  letter-spacing: 2px;
  margin-bottom: 6px;
}

.ms-rating-text {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
}

.ms-stripe {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.ms-stripe i {
  color: var(--navy);
}

/* What's included */
.ms-included {
  margin-bottom: 40px;
}

.ms-section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--navy);
  margin: 0 0 20px;
}

.ms-included-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.ms-included-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow);
}

.ms-included-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 12px;
  border-radius: 10px;
  background: #f0f7ff;
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
}

.ms-included-item strong {
  display: block;
  font-size: 0.875rem;
  color: var(--navy);
  margin-bottom: 6px;
}

.ms-included-item span {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Description */
.ms-description {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 40px;
  box-shadow: var(--shadow);
}

.ms-description p {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.ms-description p:last-child {
  margin-bottom: 0;
}

/* Trust bar */
.ms-trust {
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f4ff 100%);
  border-top: 1px solid #c5d9f5;
  padding: 28px 20px;
}

.ms-trust-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.ms-trust-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 16px;
}

.ms-trust-title i {
  color: var(--blue);
}

.ms-trust-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 28px;
}

.ms-trust-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--navy);
}

.ms-trust-list i {
  color: var(--teal);
}

/* Related papers */
.ms-related {
  margin-bottom: 48px;
}

.ms-related .papers-grid {
  margin-top: 8px;
}

@media (max-width: 1100px) {
  .ms-included-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .ms-hero-body {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .ms-hero-copy {
    width: 100%;
  }
}

@media (max-width: 992px) {
  .ms-layout {
    grid-template-columns: 1fr;
  }

  .ms-purchase {
    position: static;
  }
}

@media (max-width: 768px) {
  .ms-container {
    padding: 16px 12px 32px;
  }

  .ms-hero {
    padding: 24px 20px;
  }

  .ms-included-grid {
    grid-template-columns: 1fr 1fr;
  }

  .ms-purchase-price-amount {
    font-size: 2.75rem;
  }

  .ms-purchase-perks {
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .ms-included-grid {
    grid-template-columns: 1fr;
  }
}