:root{--bg-primary: #0f1117;--bg-secondary: #1a1d27;--bg-card: #222536;--text-primary: #e8eaed;--text-secondary: #9aa0a6;--accent: #00c896;--accent-hover: #00a87d;--danger: #ff4757;--warning: #ffa502;--border: #2d3148;--radius: 12px;--radius-sm: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;min-height:100vh;max-width:480px;margin:0 auto}.auth-screen{display:flex;align-items:center;justify-content:center}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.header-title{font-size:18px;font-weight:700;color:var(--accent)}.user-info{display:flex;align-items:center;gap:8px}.user-name{font-size:13px;color:var(--text-secondary)}.btn-logout{font-size:12px;color:var(--text-secondary);background:none;border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 8px;cursor:pointer}.login-hint{font-size:13px;color:var(--text-secondary)}.tab-bar{display:flex;background:var(--bg-secondary);border-top:1px solid var(--border);position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;z-index:10;padding-bottom:env(safe-area-inset-bottom,0)}.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 0;text-decoration:none;color:var(--text-secondary);font-size:11px;transition:color .2s}.tab-item.active{color:var(--accent)}.main-content{flex:1;padding-bottom:70px}.page{padding:16px}.page-title{font-size:20px;font-weight:700;margin-bottom:16px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.page-header .page-title{margin-bottom:0}.btn-refresh{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:8px}.category-tabs{display:flex;gap:8px;padding-bottom:16px;overflow-x:auto;scrollbar-width:none}.category-tabs::-webkit-scrollbar{display:none}.category-tab{flex-shrink:0;padding:6px 16px;border-radius:20px;border:1px solid var(--border);background:transparent;color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all .2s}.category-tab.active{background:var(--accent);border-color:var(--accent);color:#fff}.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.product-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:transform .2s;position:relative}.product-card:active{transform:scale(.97)}.product-image{aspect-ratio:1;overflow:hidden}.product-image img{width:100%;height:100%;object-fit:cover}.product-image-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);color:var(--text-secondary)}.product-image-placeholder.large{aspect-ratio:16/9;border-radius:var(--radius)}.product-info{padding:10px}.product-name{font-size:14px;font-weight:600;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.product-desc{font-size:12px;color:var(--text-secondary);margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.product-price{display:flex;align-items:baseline;gap:2px}.price-symbol{font-size:12px;color:var(--accent)}.price-value{font-size:16px;font-weight:700;color:var(--accent)}.price-currency{font-size:11px;color:var(--text-secondary);margin-left:4px}.product-sold-out{position:absolute;top:8px;right:8px;background:var(--danger);color:#fff;font-size:11px;font-weight:600;padding:2px 8px;border-radius:4px}.detail-page{padding-bottom:100px}.back-btn{display:flex;align-items:center;gap:4px;background:none;border:none;color:var(--text-secondary);font-size:14px;cursor:pointer;padding:0;margin-bottom:16px}.detail-image{border-radius:var(--radius);overflow:hidden;margin-bottom:16px}.detail-image img{width:100%;display:block}.detail-name{font-size:22px;font-weight:700;margin-bottom:8px}.detail-price{display:flex;align-items:baseline;gap:2px;margin-bottom:16px}.detail-price .price-value{font-size:28px}.detail-meta{display:flex;gap:16px;margin-bottom:20px}.meta-item{font-size:13px;color:var(--text-secondary)}.detail-description{margin-bottom:24px}.detail-description h2{font-size:16px;font-weight:600;margin-bottom:8px}.detail-description p{font-size:14px;color:var(--text-secondary);line-height:1.6}.btn-purchase{width:100%;padding:14px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;transition:background .2s;position:fixed;bottom:80px;left:50%;transform:translate(-50%);max-width:448px;width:calc(100% - 32px)}.btn-purchase:hover:not(:disabled){background:var(--accent-hover)}.btn-purchase:disabled{opacity:.5;cursor:not-allowed}.orders-list{display:flex;flex-direction:column;gap:12px}.order-card{background:var(--bg-card);border-radius:var(--radius);padding:14px}.order-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.order-id{font-size:12px;color:var(--text-secondary);font-family:monospace}.order-status{font-size:12px;font-weight:600;padding:2px 8px;border-radius:4px}.status-pending{background:#ffa50226;color:var(--warning)}.status-paid{background:#00c89626;color:var(--accent)}.status-delivered{background:#00c89640;color:var(--accent)}.status-failed{background:#ff475726;color:var(--danger)}.order-body{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.order-product{font-size:15px;font-weight:600}.order-amount{font-size:14px;color:var(--accent);font-weight:600}.order-footer{margin-bottom:0}.order-time{font-size:12px;color:var(--text-secondary)}.order-delivery{margin-top:12px;padding:10px;background:var(--bg-secondary);border-radius:var(--radius-sm)}.delivery-label{font-size:12px;color:var(--text-secondary);margin-bottom:6px}.delivery-content code{font-size:13px;color:var(--accent);word-break:break-all}.order-action{margin-top:12px}.btn-pay{display:block;text-align:center;padding:10px;background:var(--accent);color:#fff;text-decoration:none;border-radius:var(--radius-sm);font-size:14px;font-weight:600}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px;gap:12px}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading p{font-size:14px;color:var(--text-secondary)}.error-msg{text-align:center;padding:24px}.error-msg h2{font-size:18px;margin-bottom:8px}.error-msg p{font-size:14px;color:var(--text-secondary);margin-bottom:16px}.error-msg.inline{padding:12px;background:#ff47571a;border-radius:var(--radius-sm);color:var(--danger);font-size:13px;margin-bottom:12px}.error-msg button,.empty-state button{padding:8px 20px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:14px;cursor:pointer}.empty-state{text-align:center;padding:40px;color:var(--text-secondary)}