.checkout-page { background: #f7f9fc; }
.checkout-page .site-header { position: relative; }
.checkout-intro { overflow: hidden; border-bottom: 1px solid var(--line); background: linear-gradient(100deg, #fff 0%, #f3f7fb 58%, #e7eef5 100%); }
.intro-grid { min-height: 330px; display: grid; grid-template-columns: 43% 57%; align-items: center; gap: 22px; }
.intro-copy { padding: 44px 0; position: relative; z-index: 2; }
.sketchup-lockup { display: inline-flex; align-items: center; gap: 14px; margin-bottom: 20px; padding: 10px 14px 10px 10px; border: 1px solid #dbe4ed; border-radius: 12px; background: rgba(255,255,255,.82); box-shadow: 0 8px 24px rgba(9,43,89,.07); }
.sketchup-mark { width: 46px; height: 46px; flex: 0 0 auto; }
.sketchup-lockup span, .sketchup-lockup strong { display: block; line-height: 1.25; }
.sketchup-lockup span { color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; }
.sketchup-lockup strong { color: var(--navy); font-size: 1rem; }
.intro-copy h1 { margin: 0 0 12px; font-size: clamp(2.35rem, 4vw, 4rem); }
.intro-copy > p { max-width: 580px; margin: 0; color: var(--muted); font-size: 1.04rem; }
.intro-visual { align-self: stretch; margin-right: -9vw; overflow: hidden; }
.intro-visual img { width: 100%; height: 100%; min-height: 330px; object-fit: cover; object-position: center 45%; mix-blend-mode: multiply; }
.checkout-section { padding: 58px 0 72px; }
.checkout-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(340px, .75fr); gap: 36px; align-items: start; }
.product-configurator, .order-summary { border: 1px solid #e0e7ee; border-radius: 18px; background: #fff; box-shadow: 0 15px 42px rgba(9,43,89,.08); }
.product-configurator { padding: 34px; }
.order-summary { position: sticky; top: 24px; padding: 30px; }
.section-heading { margin-bottom: 24px; }
.step-label { margin: 0 0 5px; color: var(--blue); font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.section-heading h2, .order-summary h2 { margin: 0; font-size: 1.85rem; }
label.base-product {
  cursor: pointer;
}
.base-product { 
  display: block; 
  padding: 22px; 
  border: 1px solid #dfe6ed; 
  border-radius: 13px; 
  background: #fff; 
  margin-top: 16px;
}
.base-product.selected-product {
  background: #f4f9fd; 
  border: 2px solid rgba(15,103,177,.36); 
}
.base-product .product-head {
  display: grid; 
  grid-template-columns: 24px 1fr auto;
  gap: 18px; 
  align-items: center;
}
.product-icon { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 11px; color: #fff; background: var(--blue); font-weight: 900; letter-spacing: -.02em; }
.product-description .product-title,
.product-option-description .product-option-title { 
  color: var(--navy);
  font-size: 1.2rem;
  line-height: 1.2;
}
.product-description .product-subtitle,
.product-option-description .product-option-subtitle,
.product-price-details .product-price-subtitle { 
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.2;
  margin-bottom: 0.2rem;
 }
.product-description .product-note,
.product-option-text .product-option-note { 
  font-size: .88rem; 
}
.product-description .product-note ul,
.product-option-text .product-option-note ul {
    padding-left: 1rem;
}
.product-price { text-align: right; }
.product-price strong, .product-price span { display: block; }
.product-price strong { color: var(--navy); font-size: 1.1rem; }
.product-price span { color: var(--muted); font-size: .76rem; }
fieldset { min-width: 0; margin: 32px 0 0; padding: 0; border: 0; }
legend { width: 100%; margin-bottom: 13px; color: var(--navy); font-size: 1rem; font-weight: 800; }
.option-card {
  position: relative; 
  display: block;
  margin-top: 10px; 
  padding: 18px; 
  border: 1px solid #dfe6ed; 
  border-radius: 11px; 
  background: #fff; 
  cursor: pointer; 
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}
.option-card .product-option-head {
  position: relative; 
  display: grid; 
  grid-template-columns: 24px 1fr auto;
  gap: 14px; 
  align-items: center;
}
.option-card:hover, .package-card:hover { transform: translateY(-1px); border-color: #a8bfd4; }
.option-card input, .package-card input { position: absolute; opacity: 0; pointer-events: none; }
.custom-check { width: 22px; height: 22px; display: grid; place-items: center; border: 2px solid #b5c3d0; border-radius: 5px; background: #fff; }
.custom-check::after { content: "✓"; color: #fff; font-size: .78rem; font-weight: 900; opacity: 0; }
.option-card:has(input:checked), .package-card:has(input:checked) { border-color: var(--blue); background: #f1f7fc; }
.option-card input:checked + .custom-check, .package-card input:checked ~ .custom-check { border-color: var(--blue); background: var(--blue); }
.option-card input:checked + .custom-check::after, .package-card input:checked ~ .custom-check::after { opacity: 1; }
.option-copy strong, .option-copy small { display: block; }
.option-copy strong { color: var(--navy); }
.option-copy small { margin-top: 2px; color: var(--muted); line-height: 1.45; }
.option-price { color: var(--navy); font-weight: 800; white-space: nowrap; }
.package-card { grid-template-columns: 24px 1fr auto; padding-top: 27px; border: 2px solid #b8cce0; }
.package-badge { position: absolute; top: -11px; right: 16px; padding: 4px 10px; border-radius: 999px; color: #fff; background: var(--blue); font-size: .68rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.package-price { text-align: right; white-space: nowrap; }
.package-price del, .package-price strong { display: block; }
.package-price del { color: #8290a1; font-size: .78rem; }
.package-price strong { color: var(--navy); font-size: 1.05rem; }
.order-summary h2 { margin-bottom: 22px; }
.summary-lines { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.summary-line { display: flex; justify-content: space-between; gap: 18px; padding: 15px 0; color: var(--navy); font-size: .9rem; }
.summary-line + .summary-line { border-top: 1px solid #edf1f5; }
.summary-line span strong, .summary-line span small { display: block; }
.summary-line span small { color: var(--muted); font-size: .76rem; }
.summary-totals { padding: 17px 0 8px; }
.summary-totals > div { display: flex; justify-content: space-between; gap: 20px; margin: 8px 0; color: var(--muted); font-size: .86rem; }
.summary-totals > div strong { color: var(--ink); text-align: right; font-size: .83rem; }
.summary-totals .grand-total { 
  align-items: end; 
  margin-top: 18px; 
  padding-top: 17px;
  border-top: 1px solid var(--line); 
  color: var(--navy); 
  font-size: 1rem; 
  font-weight: 800; 
}
.checkout-button { width: 100%; gap: 20px; margin-top: 14px; text-align: center; }
.checkout-note { margin: 13px 5px 20px; color: var(--muted); text-align: center; font-size: .75rem; line-height: 1.45; }
.payment-methods { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding-top: 18px; border-top: 1px solid var(--line); }
.payment-logo { 
  position: relative; 
  height: 42px; 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  overflow: hidden; 
  border: 1px solid #dce3ea; 
  border-radius: 7px; 
  background: #fff; 
  font-family: Arial, sans-serif; 
}
.payment-logo > img {
  display: grid; 
  place-items: center;
  border-radius: 2px; 
  padding: 3px;  
  max-height: 100%;
  max-width: 100%;
}

@media (max-width: 950px) {
  .intro-grid { grid-template-columns: 1fr; }
  .intro-copy { padding-bottom: 18px; }
  .intro-visual { height: 190px; margin: 0 -8vw; }
  .intro-visual img { min-height: 190px; object-position: center 49%; }
  .checkout-layout { grid-template-columns: 1fr; }
  .order-summary { position: static; }
}
@media (max-width: 620px) {
  .intro-grid { min-height: 0; }
  .intro-copy { padding: 34px 0 14px; }
  .intro-copy h1 { font-size: 2.25rem; }
  .intro-visual { height: 145px; }
  .intro-visual img { min-height: 145px; }
  .checkout-section { padding: 32px 0 46px; }
  .product-configurator, .order-summary { padding: 22px; border-radius: 13px; }
  .base-product .product-head { 
    grid-template-columns: 48px 1fr; 
    padding: 17px; 
  }
  .product-icon { width: 46px; height: 46px; }
  .product-price { grid-column: 2; text-align: left; }
  .option-card .product-option-head {
    grid-template-columns: 24px 1fr;
  }
  .package-card { grid-template-columns: 24px 1fr; }
  .option-price, .package-price { grid-column: 2; text-align: left; }
  .payment-methods { grid-template-columns: repeat(2, 1fr); }
}