:root{--ink:#111;--muted:#6b7280;--line:#e5e7eb;--soft:#f6f6f6;--brand:#111;--green:#15803d;--danger:#b91c1c;--radius:14px}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,Helvetica,sans-serif;color:var(--ink);background:#fff}.checkout-header{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));background:#fff;position:sticky;top:0;z-index:20}.brand{font-size:30px;font-weight:900;letter-spacing:5px;text-decoration:none;color:#111}.brand span{display:inline-block;transform:skew(-7deg)}.secure-badge{font-size:13px;font-weight:700;color:#374151}.checkout-shell{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(330px,.75fr);min-height:calc(100vh - 126px)}.checkout-main{padding:44px 58px 60px 0}.order-summary{background:#f7f7f7;border-left:1px solid var(--line);padding:44px 0 60px 46px}.summary-sticky{position:sticky;top:115px;padding-right:18px}.steps{display:flex;align-items:center;margin-bottom:34px}.step{border:0;background:none;padding:0;color:#9ca3af;font-size:12px;font-weight:700;display:flex;align-items:center;gap:8px}.step span{width:26px;height:26px;border-radius:50%;border:1px solid #d1d5db;display:grid;place-items:center;background:#fff}.step.active{color:#111}.step.active span{background:#111;color:#fff;border-color:#111}.step-line{height:1px;background:#d1d5db;flex:1;margin:0 12px}.panel{display:none;border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:#fff;box-shadow:0 7px 22px rgba(0,0,0,.035)}.panel.active{display:block}.panel-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:24px}.eyebrow{font-size:11px;letter-spacing:.12em;color:#6b7280;font-weight:800;margin:0 0 7px}.panel h1,.panel h2{font-size:24px;line-height:1.15;margin:0}.panel-icon{width:34px;height:34px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;background:#fafafa}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}.field span{font-size:13px;font-weight:700}.field em{font-size:11px;color:#9ca3af;font-style:normal;font-weight:500}.field input,.field select{height:52px;border:1px solid #d1d5db;border-radius:9px;padding:0 14px;font-size:15px;outline:none;background:#fff;color:#111}.field input:focus,.field select:focus{border-color:#111;box-shadow:0 0 0 2px rgba(17,17,17,.06)}.primary-btn{width:100%;height:54px;border:0;border-radius:9px;background:#111;color:#fff;font-size:15px;font-weight:800;cursor:pointer;margin-top:22px;display:flex;align-items:center;justify-content:center;text-decoration:none}.primary-btn:hover{background:#242424}.primary-btn:disabled{opacity:.55;cursor:not-allowed}.action-row{display:flex;align-items:center;gap:16px;margin-top:4px}.action-row .primary-btn{flex:1}.text-btn{border:0;background:none;padding:18px 4px 0 0;font-size:14px;font-weight:700;color:#4b5563;cursor:pointer}.back-only{justify-content:flex-start}.shipping-option{border:1.5px solid #111;border-radius:10px;padding:16px;display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;margin-top:18px}.shipping-option div:nth-child(2){display:flex;flex-direction:column;gap:4px}.shipping-option span{font-size:12px;color:#6b7280}.radio-dot{width:18px;height:18px;border-radius:50%;border:5px solid #111}.stripe-note{font-size:13px;color:#6b7280;margin:0 0 18px}.payment-element{border-top:1px solid #f0f0f0;padding-top:4px}.fallback-card{background:#fafafa;border:1px solid var(--line);border-radius:12px;padding:28px;text-align:center}.fallback-lock{font-size:28px}.fallback-card h3{margin:10px 0 8px}.fallback-card p{font-size:13px;line-height:1.6;color:#6b7280;max-width:470px;margin:0 auto}.link-btn{margin-top:20px}.message{border-radius:9px;padding:13px 15px;font-size:13px;margin-bottom:16px}.message.error{background:#fff1f2;border:1px solid #fecdd3;color:#9f1239}.message.success{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}.hidden{display:none!important}.spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-left:10px}@keyframes spin{to{transform:rotate(360deg)}}.checkout-trust{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}.checkout-trust>div{border:1px solid var(--line);border-radius:10px;padding:14px;text-align:center;display:flex;flex-direction:column;gap:4px}.checkout-trust b{font-size:12px}.checkout-trust small{font-size:10px;color:#6b7280}.order-summary h2{font-size:18px;margin:0 0 24px}.product-row{display:grid;grid-template-columns:70px 1fr auto;gap:14px;align-items:center;padding-bottom:24px;border-bottom:1px solid #ddd}.product-image{position:relative;width:70px;height:70px;border:1px solid #ddd;border-radius:10px;background:#fff;overflow:visible}.product-image img{width:100%;height:100%;object-fit:contain;border-radius:10px}.qty-badge{position:absolute;right:-8px;top:-8px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:#666;color:#fff;font-size:11px}.product-copy{display:flex;flex-direction:column;gap:5px}.product-copy strong{font-size:13px;line-height:1.35}.product-copy span{font-size:12px;color:#6b7280}.product-row>b{font-size:13px}.summary-line{display:flex;justify-content:space-between;padding:16px 0 0;font-size:13px}.summary-line .free{color:var(--green)}.summary-total{display:flex;justify-content:space-between;align-items:flex-end;border-top:1px solid #ddd;margin-top:18px;padding-top:18px}.summary-total>span{font-weight:800}.summary-total>div{display:flex;align-items:baseline;gap:8px}.summary-total small{font-size:10px;color:#6b7280}.summary-total strong{font-size:23px}.saving{margin-top:16px;border-radius:8px;background:#ecfdf3;color:#166534;padding:10px 12px;font-size:12px;font-weight:800;text-align:center}.summary-reassurance{margin-top:20px;padding-top:18px;border-top:1px solid #ddd}.summary-reassurance p{font-size:12px;color:#4b5563;margin:9px 0}.checkout-footer{max-width:1180px;margin:0 auto;border-top:1px solid var(--line);padding:20px 0;font-size:11px;color:#6b7280;display:flex;gap:8px}.checkout-footer a{color:#4b5563;text-decoration:none}@media(max-width:900px){.checkout-header{padding:0 20px}.checkout-shell{display:flex;flex-direction:column}.checkout-main{padding:28px 18px 30px;order:2}.order-summary{order:1;border-left:0;border-bottom:1px solid var(--line);padding:22px 18px;background:#fafafa}.summary-sticky{position:static;padding:0}.order-summary h2{margin-bottom:16px}.summary-reassurance,.saving{display:none}.checkout-footer{padding:18px;justify-content:center}.steps{margin-bottom:20px}.step{font-size:0}.step span{font-size:12px}.step.active{font-size:11px}.checkout-trust{grid-template-columns:1fr}.panel{padding:22px 18px}.field-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.product-row{grid-template-columns:60px 1fr auto}.product-image{width:60px;height:60px}}