.checkout-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
}

.card {
  background: #ffffff;
  border: 1px solid #ecf0f1;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.card-body {
  padding: 2rem;
}

.product-summary {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.product-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: #2c3e50;
}

.product-subtitle {
  color: #5a6c7d;
}

.product-meta {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.meta-row,
.price-row,
.total-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.price-row,
.total-row {
  margin-top: 0.3rem;
}

.total-row span:last-child {
  font-weight: 800;
}

.secure-note {
  font-size: 0.85rem;
  color: #7f8c8d;
  margin-top: 0.8rem;
}

.hidden {
  display: none;
}

@media (max-width: 900px) {
  .checkout-grid {
    grid-template-columns: 1fr;
  }
}

/* Footer sizing and stickiness */
html,
body {
  height: 100%;
}
.checkout-main {
  min-height: calc(100vh - 260px);
}
.checkout-footer {
  padding: 2.5rem 0;
}

/* Dropdown toggle */
.dropdown-toggle {
  appearance: none;
  border: 1px solid #e1e8ed;
  background: #ffffff;
  color: #34495e;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.more-info {
  display: flex;
  justify-content: center;
}
.dropdown-toggle:hover {
  background: #f8fbff;
  border-color: #d6e9f8;
  color: #3498db;
}
.dropdown-toggle .chevron {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid #34495e;
  transition: transform 0.25s ease;
  transform: rotate(180deg);
}
.dropdown-toggle[aria-expanded="true"] .chevron {
  transform: rotate(0deg);
}
.dropdown-content {
  margin-top: 0.8rem;
  padding: 0.8rem 1rem;
  background: #ffffff;
  border: 1px solid #ecf0f1;
  border-radius: 10px;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transform: translateY(-6px);
  transition: max-height 0.35s ease, opacity 0.3s ease, transform 0.3s ease;
}
.dropdown-content.open {
  max-height: 420px; /* big enough for content */
  opacity: 1;
  transform: translateY(0);
}
.features-block {
  margin-bottom: 0.6rem;
}
.features-title {
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 0.3rem;
}
.dropdown-content #productFeatures {
  margin-left: 1rem;
  color: #5a6c7d;
}
.dropdown-content ul {
  margin-left: 1rem;
  color: #5a6c7d;
}
.info-link {
  display: inline-block;
  margin-top: 0.6rem;
  color: #3498db;
  text-decoration: none;
  font-weight: 600;
}
.info-link:hover {
  text-decoration: underline;
}

/* Back link */
.back-link {
  color: #3498db;
  text-decoration: none;
  font-weight: 600;
}
.back-link:hover {
  text-decoration: underline;
}