:root{--app-bg: #FFFFFF;--text-primary: #1F2937;--text-secondary: #6B7280;--accent-blue: #0A84FF;--accent-blue-dark: #0066CC;--border-light: #F3F4F6;--shadow-soft: 0 4px 20px rgba(0, 0, 0, .04);--radius-card: 20px;--font-main: "Inter", system-ui, sans-serif;--transition-speed: .3s;--ease-out: cubic-bezier(.25, .46, .45, .94)}body{background:var(--app-bg);color:var(--text-primary);font-family:var(--font-main);padding-bottom:140px;-webkit-font-smoothing:antialiased}.secure-header{position:fixed;top:0;left:0;width:100%;height:60px;background:#fffffffa;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-light);display:flex;align-items:center;justify-content:center;z-index:1000;gap:8px;font-weight:600;font-size:1rem;color:var(--text-primary)}.secure-header img{height:24px;width:auto}.lock-icon{color:var(--accent-blue-dark);width:18px;height:18px}.checkout-flow{max-width:600px;margin:80px auto 0;padding:0 16px;display:flex;flex-direction:column;gap:16px}.step-card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-card);box-shadow:var(--shadow-soft);overflow:hidden;transition:box-shadow var(--transition-speed) var(--ease-out),border-color var(--transition-speed) var(--ease-out)}.step-card.active{border-color:var(--accent-blue);box-shadow:0 12px 32px #0a84ff1f}.step-card.locked{opacity:.6;pointer-events:none;background:#fafafa}.step-header{padding:24px;display:flex;align-items:flex-start;justify-content:space-between;cursor:pointer;background:transparent;min-height:80px;transition:background-color .2s}.step-header:active{background-color:#f9fafb}.step-title{font-size:1.125rem;font-weight:700;color:var(--text-primary);margin:0;line-height:1.3}.step-content{max-height:0;opacity:0;overflow:hidden;transition:max-height var(--transition-speed) var(--ease-out),opacity var(--transition-speed) var(--ease-out);padding:0 24px}.step-card.active .step-content{max-height:2000px;opacity:1;padding-bottom:32px}.step-card.completed .step-header{padding:20px 24px;min-height:auto}.step-card.completed .step-title{font-size:1rem;color:var(--text-secondary);font-weight:500}.checkmark{width:28px;height:28px;background:var(--accent-blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;opacity:0;transform:scale(.8);transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.step-card.completed .checkmark{opacity:1;transform:scale(1)}.sticky-footer{position:fixed;bottom:0;left:0;width:100%;background:#fff;padding:16px 24px;box-shadow:0 -8px 24px #00000014;z-index:1000;border-top:none;display:flex;align-items:center;justify-content:space-between;gap:16px}.total-label{font-size:.85rem;color:var(--text-secondary);display:block;margin-bottom:2px}.total-value{font-size:1.5rem;font-weight:800;color:var(--text-primary);line-height:1.1;font-feature-settings:"tnum";transition:color .2s}.total-value.pulse{animation:price-pulse .3s ease-out}@keyframes price-pulse{0%{transform:scale(1);color:var(--text-primary)}50%{transform:scale(1.1);color:var(--accent-blue-dark)}to{transform:scale(1);color:var(--text-primary)}}.primary-btn{background:var(--accent-blue);color:#fff;border:none;padding:16px 32px;border-radius:99px;font-weight:600;font-size:1rem;cursor:pointer;transition:transform .1s ease-out,background-color .2s;flex:1;max-width:300px;box-shadow:0 4px 12px #0a84ff4d;min-height:56px}.primary-btn:active{transform:scale(.96);background:var(--accent-blue-dark)}.primary-btn:disabled{background:#e5e7eb;color:#9ca3af;box-shadow:none;cursor:not-allowed;transform:none}.payment-handoff{text-align:center;padding:16px 0}.trust-badges{display:flex;justify-content:center;gap:16px;margin:24px 0;opacity:.8}.review-card{background:#f9fafb;border-radius:12px;padding:20px;text-align:left;margin-top:24px;border:1px solid var(--border-light)}.review-row{display:flex;justify-content:space-between;padding:10px 0;font-size:.95rem;color:var(--text-primary);border-bottom:1px dashed #E5E7EB}.review-row span:last-child{font-weight:500;font-feature-settings:"tnum"}.review-row:last-child{border-bottom:none;font-weight:800;font-size:1.1rem;margin-top:12px;color:var(--text-primary)}.tag-types-grid{display:grid;gap:16px}.step-helper{font-size:.9rem;color:var(--text-secondary);margin:6px 0 0;font-weight:400;line-height:1.5}.microcopy-helper{font-size:.85rem;color:var(--text-secondary);display:block;margin-top:4px}.selection-feedback{color:var(--accent-blue-dark);font-weight:600}.tag-info .selection-feedback{display:block;margin-top:6px;font-size:.85rem;opacity:0;animation:fade-in-up .3s ease-out forwards}@keyframes fade-in-up{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.trust-text{font-size:.95rem;color:var(--text-secondary);margin-bottom:24px}.step-card{border-left:4px solid transparent}.step-card.active{border-left:4px solid var(--accent-blue)}.radio-label{padding:16px;min-height:64px;display:flex;align-items:center;cursor:pointer;border:1px solid var(--border-light);border-radius:12px;transition:background-color .2s,border-color .2s}.radio-label:active{background-color:#f3f4f6}.checkmark{flex-shrink:0}.price-tag{font-weight:700;color:var(--text-primary);font-size:.95rem}.layout-wrapper{width:100%;margin:0 auto}.desktop-summary{display:none}.mobile-only-review{display:block}@media(min-width:1024px){.layout-wrapper{display:grid;grid-template-columns:1.2fr .8fr;gap:64px;max-width:1200px;padding:0 40px;margin-top:100px}.checkout-flow{margin:0;max-width:100%;padding:0}.step-header{padding:32px}.step-title{font-size:1.25rem}.step-helper{font-size:1rem}.step-content{padding:0 32px 32px}.desktop-summary{display:block;position:sticky;top:100px;height:fit-content}.summary-card{background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-soft);padding:32px;border:1px solid var(--border-light)}.summary-card h3{margin-top:0;margin-bottom:24px;font-size:1.25rem;color:var(--text-primary)}.summary-divider{height:1px;background:var(--border-light);margin:24px 0}.desktop-total-row{display:flex;justify-content:space-between;align-items:center;margin-top:8px}.desktop-total-row span:first-child{font-size:1.1rem;color:var(--text-secondary);font-weight:500}.desktop-total-row span:last-child{font-size:1.75rem;font-weight:800;color:var(--text-primary);font-feature-settings:"tnum"}.mobile-only-review{display:none}.sticky-footer{padding:24px 40px;max-width:1200px;left:50%;transform:translate(-50%);width:100%;box-shadow:none;border-top:1px solid var(--border-light)}.sticky-footer .total-value,.sticky-footer .total-label{display:none}.sticky-footer .primary-btn{max-width:100%}.sticky-footer{display:grid;grid-template-columns:1.2fr .8fr;gap:64px;background:#ffffffe6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.sticky-footer>div{display:none}.sticky-footer>button{grid-column:1;width:100%;max-width:none}}.spinner{width:40px;height:40px;border:3px solid rgba(255,255,255,.1);border-radius:50%;border-top-color:var(--primary);animation:spin .8s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}