:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-success: #16a34a;--color-success-hover: #15803d;--color-danger: #dc2626;--color-text: #111827;--color-text-secondary: #6b7280;--color-text-muted: #9ca3af;--color-bg: #ffffff;--color-bg-alt: #f9fafb;--color-bg-dark: #111827;--color-border: #e5e7eb;--color-border-light: #f3f4f6;--radius: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1), 0 4px 6px rgba(0, 0, 0, .05);--max-width: 1200px;--header-height: 64px;--transition: .15s ease}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}ul{list-style:none}.app{min-height:100vh;display:flex;flex-direction:column}.app-content{flex:1;padding-top:var(--header-height)}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--color-border);z-index:100}.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem;height:100%;display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.25rem}.logo-icon{width:32px;height:32px;background:var(--color-primary);color:#fff;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:700}.logo-text{color:var(--color-text)}.nav{display:flex;align-items:center;gap:2rem}.nav-link{font-size:.9375rem;font-weight:500;color:var(--color-text-secondary);transition:color var(--transition)}.nav-link:hover{color:var(--color-text)}.cart-link{position:relative;display:flex;align-items:center;color:var(--color-text-secondary);transition:color var(--transition)}.cart-link:hover{color:var(--color-text)}.cart-icon{width:24px;height:24px}.cart-badge{position:absolute;top:-6px;right:-8px;background:var(--color-primary);color:#fff;font-size:.6875rem;font-weight:600;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:inherit;font-weight:600;font-size:.875rem;padding:.625rem 1.25rem;border-radius:var(--radius);border:2px solid transparent;cursor:pointer;transition:all var(--transition);white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-success{background:var(--color-success);color:#fff}.btn-success:hover:not(:disabled){background:var(--color-success-hover)}.btn-outline{background:transparent;border-color:var(--color-border);color:var(--color-text)}.btn-outline:hover:not(:disabled){border-color:var(--color-text)}.btn-sm{font-size:.8125rem;padding:.4375rem .875rem}.btn-lg{font-size:1rem;padding:.75rem 1.75rem}.btn-full{width:100%}.hero{background:linear-gradient(135deg,#0f172a,#1e3a5f,#0f172a);color:#fff;padding:6rem 1.5rem;text-align:center}.hero-content{max-width:640px;margin:0 auto}.hero-title{font-size:clamp(2.25rem,5vw,3.5rem);font-weight:700;line-height:1.15;margin-bottom:1.25rem;letter-spacing:-.025em}.hero-subtitle{font-size:1.125rem;color:#ffffffb3;margin-bottom:2rem;line-height:1.7}.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.hero .btn-outline{border-color:#ffffff4d;color:#fff}.hero .btn-outline:hover{border-color:#fff}.section{padding:5rem 1.5rem}.section-alt{background:var(--color-bg-alt)}.section-title{font-size:1.875rem;font-weight:700;text-align:center;margin-bottom:.5rem;letter-spacing:-.025em}.section-subtitle{text-align:center;color:var(--color-text-secondary);margin-bottom:3rem}.page{padding:2.5rem 0 5rem}.page-header{margin-bottom:2.5rem}.page-title{font-size:2rem;font-weight:700;letter-spacing:-.025em}.page-subtitle{color:var(--color-text-secondary);margin-top:.25rem}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.product-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:box-shadow var(--transition),transform var(--transition)}.product-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.product-card-image-link{display:block}.product-card-image{aspect-ratio:4 / 3;background:var(--color-bg-alt);overflow:hidden}.product-card-image-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:3rem;background:linear-gradient(135deg,#e0e7ff,#f0f4ff)}.product-card-body{padding:1.25rem}.product-card-title{font-size:1.0625rem;font-weight:600;display:block;margin-bottom:.375rem;color:var(--color-text);transition:color var(--transition)}.product-card-title:hover{color:var(--color-primary)}.product-card-description{font-size:.875rem;color:var(--color-text-secondary);margin-bottom:1rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.product-card-footer{display:flex;align-items:center;justify-content:space-between}.product-card-price{font-size:1.25rem;font-weight:700;color:var(--color-text)}.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.5rem}.category-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:2rem;text-align:center;transition:all var(--transition)}.category-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.category-icon{font-size:2.5rem;display:block;margin-bottom:1rem}.category-name{font-size:1.125rem;font-weight:600;margin-bottom:.5rem}.category-description{font-size:.875rem;color:var(--color-text-secondary)}.value-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:2rem}.value-card{text-align:center;padding:1.5rem}.value-icon{color:var(--color-primary);margin-bottom:1rem;display:flex;justify-content:center}.value-card h3{font-size:1.0625rem;font-weight:600;margin-bottom:.5rem}.value-card p{font-size:.875rem;color:var(--color-text-secondary)}.products-layout{display:grid;grid-template-columns:220px 1fr;gap:3rem}.products-sidebar{position:sticky;top:calc(var(--header-height) + 2rem);align-self:start}.sidebar-heading{font-size:.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);margin-bottom:.75rem}.category-filter-list{display:flex;flex-direction:column;gap:.25rem}.category-filter-item{display:flex;align-items:center;gap:.5rem;padding:.5rem .75rem;border-radius:var(--radius);font-size:.9375rem;color:var(--color-text-secondary);transition:all var(--transition)}.category-filter-item:hover{background:var(--color-bg-alt);color:var(--color-text)}.category-filter-item.active{background:var(--color-primary);color:#fff;font-weight:500}.breadcrumb{display:flex;align-items:center;gap:.5rem;font-size:.875rem;color:var(--color-text-muted);margin-bottom:2rem}.breadcrumb a{color:var(--color-text-secondary);transition:color var(--transition)}.breadcrumb a:hover{color:var(--color-primary)}.breadcrumb-sep{color:var(--color-border)}.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}.product-detail-image-placeholder{aspect-ratio:1;background:linear-gradient(135deg,#e0e7ff,#f0f4ff);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:6rem}.product-detail-category{font-size:.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-primary);margin-bottom:.5rem}.product-detail-title{font-size:2rem;font-weight:700;letter-spacing:-.025em;margin-bottom:.75rem}.product-detail-price{font-size:1.5rem;font-weight:700;color:var(--color-text);margin-bottom:1.5rem}.product-detail-description{color:var(--color-text-secondary);margin-bottom:2rem;line-height:1.7}.product-detail-features h3{font-size:1rem;font-weight:600;margin-bottom:.75rem}.product-detail-features ul{list-style:none;display:flex;flex-direction:column;gap:.5rem;margin-bottom:2rem}.product-detail-features li{display:flex;align-items:center;gap:.5rem;font-size:.9375rem;color:var(--color-text-secondary)}.product-detail-features li:before{content:"✓";color:var(--color-success);font-weight:700}.product-detail-actions{display:flex;gap:1rem;align-items:center;margin-bottom:1.5rem}.product-detail-stock{font-size:.875rem;font-weight:500}.product-detail-stock.in-stock{color:var(--color-success)}.quantity-selector{display:flex;align-items:center;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden}.quantity-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--color-bg);border:none;font-size:1rem;font-weight:600;cursor:pointer;color:var(--color-text);transition:background var(--transition)}.quantity-btn:hover{background:var(--color-bg-alt)}.quantity-value{width:40px;text-align:center;font-weight:600;font-size:.9375rem}.cart-layout{display:grid;grid-template-columns:1fr 380px;gap:3rem;align-items:start}.cart-items-header{display:grid;grid-template-columns:2fr 1fr 1fr 40px;gap:1rem;padding:0 0 .75rem;border-bottom:1px solid var(--color-border);font-size:.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted)}.cart-item{display:grid;grid-template-columns:auto 1fr auto auto auto;gap:1rem;align-items:center;padding:1.25rem 0;border-bottom:1px solid var(--color-border-light)}.cart-item-image{width:72px;height:72px;border-radius:var(--radius);overflow:hidden;flex-shrink:0}.cart-item-image-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e0e7ff,#f0f4ff);font-size:1.5rem}.cart-item-name{font-size:.9375rem;font-weight:600}.cart-item-price{font-size:.8125rem;color:var(--color-text-secondary);margin-top:.125rem}.cart-item-total{font-weight:600;font-size:.9375rem;min-width:80px;text-align:right}.cart-item-remove{background:none;border:none;cursor:pointer;color:var(--color-text-muted);padding:.25rem;border-radius:var(--radius);transition:all var(--transition);display:flex}.cart-item-remove:hover{color:var(--color-danger);background:#fef2f2}.cart-summary{background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:2rem;position:sticky;top:calc(var(--header-height) + 2rem)}.cart-summary-title{font-size:1.125rem;font-weight:700;margin-bottom:1.5rem}.cart-summary-row{display:flex;justify-content:space-between;font-size:.9375rem;padding:.5rem 0}.cart-summary-row span:last-child{font-weight:500}.cart-summary-divider{height:1px;background:var(--color-border);margin:.75rem 0}.cart-summary-total{font-size:1.125rem;font-weight:700;margin-bottom:1.5rem}.cart-continue-shopping{display:block;text-align:center;margin-top:1rem;font-size:.875rem;color:var(--color-primary);font-weight:500}.checkout-result{text-align:center;max-width:480px;margin:4rem auto}.checkout-result-icon{margin-bottom:1.5rem;display:flex;justify-content:center}.checkout-result-icon.success{color:var(--color-success)}.checkout-result-icon.cancel{color:var(--color-danger)}.checkout-result h1{font-size:1.875rem;font-weight:700;margin-bottom:1rem}.checkout-result p{color:var(--color-text-secondary);margin-bottom:2rem;line-height:1.7}.checkout-result-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.about-hero{text-align:center;max-width:640px;margin:0 auto 4rem}.about-title{font-size:2.5rem;font-weight:700;letter-spacing:-.025em;margin-bottom:1rem}.about-lead{font-size:1.125rem;color:var(--color-text-secondary);line-height:1.7}.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-bottom:4rem}.about-card{background:var(--color-bg-alt);border-radius:var(--radius-lg);padding:2rem}.about-card h2{font-size:1.25rem;font-weight:700;margin-bottom:.75rem}.about-card p{color:var(--color-text-secondary);line-height:1.7}.about-cta{text-align:center;padding:3rem;background:var(--color-bg-alt);border-radius:var(--radius-lg)}.about-cta h2{font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.about-cta p{color:var(--color-text-secondary);margin-bottom:1.5rem}.empty-state{text-align:center;padding:4rem 1rem}.empty-state-icon{color:var(--color-text-muted);margin:0 auto 1.5rem}.empty-state h1{font-size:1.5rem;font-weight:700;margin-bottom:.75rem}.empty-state p{color:var(--color-text-secondary);margin-bottom:1rem}.footer{background:var(--color-bg-dark);color:#fffc;padding:4rem 0 2rem;margin-top:auto}.footer-inner{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem;margin-bottom:3rem}.footer-heading{color:#fff;font-weight:600;margin-bottom:1rem}.footer-text{font-size:.875rem;line-height:1.7;color:#ffffff80}.footer-links{display:flex;flex-direction:column;gap:.5rem}.footer-links a{font-size:.875rem;color:#ffffff80;transition:color var(--transition)}.footer-links a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:2rem;text-align:center;font-size:.8125rem;color:#fff6}@media(max-width:768px){.nav{gap:1.25rem}.hero{padding:4rem 1.5rem}.section{padding:3rem 1.5rem}.products-layout{grid-template-columns:1fr;gap:2rem}.products-sidebar{position:static}.category-filter-list{flex-direction:row;flex-wrap:wrap;gap:.5rem}.product-detail{grid-template-columns:1fr;gap:2rem}.cart-layout{grid-template-columns:1fr}.cart-items-header{display:none}.cart-item{grid-template-columns:auto 1fr auto;grid-template-rows:auto auto}.cart-item-quantity{grid-column:2;grid-row:2}.cart-item-total{grid-column:3;grid-row:2}.cart-item-remove{grid-column:3;grid-row:1}.footer-grid{grid-template-columns:1fr 1fr;gap:2rem}}@media(max-width:480px){.hero-actions{flex-direction:column;align-items:center}.footer-grid{grid-template-columns:1fr}}