:root{--primary-color:#6366f1;--primary-hover:#4f46e5;--background-color:#0f172a;--surface-color:#1e293b;--surface-hover:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--accent-color:#f43f5e;--border-color:#334155;--font-family:"Inter", system-ui, -apple-system, sans-serif}body{font-family:var(--font-family);background-color:var(--background-color);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0}*{box-sizing:border-box}a{color:inherit;text-decoration:none}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:2rem}.header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);z-index:10;background:#1e293bcc;position:sticky;top:0}.header-content{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex}.logo{background:linear-gradient(135deg, var(--primary-color), var(--accent-color));-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:.5rem;font-size:1.5rem;font-weight:800;display:flex}.cart-icon-wrapper{cursor:pointer;background-color:var(--surface-color);border-radius:9999px;align-items:center;gap:.5rem;padding:.5rem 1rem;transition:all .2s;display:flex;position:relative}.cart-icon-wrapper:hover{background-color:var(--surface-hover);transform:translateY(-1px)}.cart-badge{background-color:var(--accent-color);color:#fff;border-radius:10px;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:.75rem;font-weight:700;display:flex}.btn{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:all .2s;display:inline-flex}.btn:hover{background-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px #6366f14d}.btn-secondary{border:1px solid var(--border-color);background-color:#0000}.btn-secondary:hover{background-color:var(--surface-hover);box-shadow:none}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.products-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;margin-top:2rem;display:grid}.product-card{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;flex-direction:column;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;overflow:hidden}.product-card:hover{border-color:var(--primary-color);transform:translateY(-4px);box-shadow:0 10px 25px #00000080}.product-image-container{background:linear-gradient(135deg, var(--surface-hover), var(--surface-color));justify-content:center;align-items:center;height:200px;display:flex;position:relative;overflow:hidden}.product-icon{width:64px;height:64px;color:var(--primary-color);opacity:.8;transition:transform .3s}.product-card:hover .product-icon{transform:scale(1.1)}.product-info{flex-direction:column;flex:1;padding:1.5rem;display:flex}.product-title{margin:0 0 .5rem;font-size:1.25rem;font-weight:700}.product-desc{color:var(--text-muted);flex:1;margin:0 0 1.5rem;line-height:1.5}.product-footer{justify-content:space-between;align-items:center;margin-top:auto;display:flex}.product-price{color:#fff;font-size:1.5rem;font-weight:800}.detail-container{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:24px;grid-template-columns:1fr 1fr;gap:3rem;padding:3rem;display:grid}.detail-image{background:linear-gradient(135deg, var(--surface-hover), var(--surface-color));border-radius:16px;justify-content:center;align-items:center;min-height:400px;display:flex}.detail-icon{width:120px;height:120px;color:var(--primary-color)}.detail-info{flex-direction:column;justify-content:center;display:flex}.detail-title{margin:0 0 1rem;font-size:2.5rem}.detail-desc{color:var(--text-muted);margin-bottom:2rem;font-size:1.1rem;line-height:1.6}.detail-price{color:var(--accent-color);margin-bottom:2rem;font-size:2.5rem;font-weight:800}.detail-actions{gap:1rem;display:flex}.page-title{margin-bottom:.5rem;font-size:2rem}.page-subtitle{color:var(--text-muted);margin-bottom:2rem;font-size:1.1rem}.checkout-container{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:24px;max-width:600px;margin:0 auto;padding:3rem}.form-group{margin-bottom:1.5rem}.form-label{color:var(--text-muted);margin-bottom:.5rem;font-weight:500;display:block}.form-input{background-color:var(--background-color);border:1px solid var(--border-color);color:#fff;border-radius:8px;width:100%;padding:.75rem 1rem;font-family:inherit;font-size:1rem;transition:all .2s}.form-input:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 2px #6366f133}.form-error{color:var(--accent-color);margin-top:.5rem;font-size:.875rem;display:block}.order-summary{background-color:var(--background-color);border:1px solid var(--border-color);border-radius:12px;margin-bottom:2rem;padding:1.5rem}.summary-row{justify-content:space-between;margin-bottom:.5rem;display:flex}.summary-row.total{border-top:1px solid var(--border-color);margin-top:1rem;padding-top:1rem;font-size:1.2rem;font-weight:700}.success-container{text-align:center;background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:24px;max-width:600px;margin:4rem auto;padding:4rem}.success-icon{color:#10b981;width:80px;height:80px;margin:0 auto 1.5rem}.header-nav{gap:.25rem;display:flex}.nav-link{color:var(--text-muted);border-radius:6px;padding:.4rem .75rem;font-size:.9rem;transition:all .2s}.nav-link:hover{color:var(--text-main);background:var(--surface-hover)}.checkout-steps{align-items:center;gap:.5rem;margin-bottom:2rem;font-size:.875rem;display:flex}.step{color:var(--text-muted);border-radius:20px;padding:.3rem .75rem}.step.active{background:var(--primary-color);color:#fff;font-weight:600}.step.done{color:#10b981;font-weight:600}.step-sep{color:var(--border-color)}.checkout-layout-wide{grid-template-columns:1fr 300px;align-items:start;gap:2rem;display:grid}.checkout-form-card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;padding:2rem}.form-footer{border-top:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-top:2rem;padding-top:1.5rem;display:flex}.shipping-options{flex-direction:column;gap:.75rem;display:flex}.shipping-option{border:1px solid var(--border-color);cursor:pointer;border-radius:10px;align-items:center;gap:1rem;padding:1rem 1.25rem;transition:all .15s;display:flex}.shipping-option:hover{border-color:var(--primary-color);background:#6366f10d}.shipping-option.selected{border-color:var(--primary-color);background:#6366f114}.shipping-option input[type=radio]{cursor:pointer}.option-title{font-size:.95rem;font-weight:600;display:block}.option-desc{color:var(--text-muted);margin-top:2px;font-size:.8rem;display:block}.card-mock-form{background:var(--background-color);border:1px dashed var(--border-color);border-radius:10px;margin-top:1.25rem;padding:1.25rem}.mock-field{opacity:.6;cursor:default}.cart-layout{grid-template-columns:1fr 300px;align-items:start;gap:2rem;display:grid}.cart-items-list{flex-direction:column;gap:.75rem;display:flex}.cart-item-row{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;align-items:center;gap:1rem;padding:1rem 1.25rem;display:flex}.cart-item-icon{background:var(--surface-hover);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;display:flex}.cart-item-details{flex:1;min-width:0}.cart-item-name{white-space:nowrap;text-overflow:ellipsis;margin:0 0 2px;font-size:.95rem;font-weight:600;overflow:hidden}.cart-item-category{color:var(--text-muted);font-size:.8rem}.cart-item-qty{background:var(--background-color);border-radius:8px;align-items:center;gap:.5rem;padding:.3rem .5rem;display:flex}.qty-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;align-items:center;padding:2px;transition:color .15s;display:flex}.qty-btn:hover{color:var(--text-main)}.cart-item-price{white-space:nowrap;font-size:1rem;font-weight:700}.remove-btn{color:var(--border-color);cursor:pointer;background:0 0;border:none;border-radius:6px;align-items:center;padding:4px;transition:all .15s;display:flex}.remove-btn:hover{color:var(--accent-color);background:#f43f5e1a}.cart-summary-box{background:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem;position:sticky;top:80px}.empty-state{text-align:center;max-width:400px;margin:5rem auto}.empty-icon{width:64px;height:64px;color:var(--text-muted);opacity:.4;margin:0 auto 1.5rem}@media (width<=768px){.detail-container,.cart-layout,.checkout-layout-wide{grid-template-columns:1fr}.header-nav{display:none}}