:root{--color-primary:#d63031;--color-primary-dark:#c0392b;--color-bg:#f8f9fa;--color-card:#ffffff;--color-text:#2d3436;--color-text-muted:#636e72;--color-border:#dfe6e9;--color-success:#00b894;--color-warning:#fdcb6e;--color-danger:#d63031;--color-link:#0984e3}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body,html{font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button,input,select,textarea{font-size:16px;font-family:inherit}a{color:var(--color-link);text-decoration:none}a:hover{text-decoration:underline}.container-app{max-width:480px;margin:0 auto;min-height:100vh;padding:0 12px 80px}.container-admin{max-width:1200px;margin:0 auto;padding:0 16px}.card{background:var(--color-card);border-radius:12px;padding:16px;box-shadow:0 1px 3px rgba(0,0,0,.08)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 24px;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:opacity .2s,background .2s;min-height:44px}.btn,.btn:hover{text-decoration:none}.btn:hover{opacity:.9}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:white}.btn-secondary{background:#e9ecef;color:var(--color-text)}.btn-success{background:var(--color-success);color:white}.btn-danger{background:var(--color-danger);color:white}.btn-outline{background:transparent;border:2px solid var(--color-border);color:var(--color-text)}.btn-sm{padding:6px 12px;font-size:14px;min-height:32px}.btn-lg{padding:16px 32px;font-size:18px;min-height:52px}.input{width:100%;padding:12px 16px;border:2px solid var(--color-border);border-radius:8px;font-size:16px;background:white;transition:border-color .2s}.input:focus{outline:none;border-color:var(--color-primary)}.label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--color-text)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;max-width:480px;margin:0 auto;background:white;border-top:1px solid var(--color-border);display:flex;justify-content:space-around;padding:8px 0;z-index:100}.bottom-nav-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 12px;color:var(--color-text-muted);font-size:12px;text-decoration:none;cursor:pointer}.bottom-nav-item.active{color:var(--color-primary)}.bottom-nav-item .icon{font-size:22px}.product-card{background:white;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.08)}.product-card img{width:100%;aspect-ratio:1;object-fit:cover}.price{color:var(--color-primary);font-weight:700;font-size:18px}.price-placeholder{color:var(--color-text-muted);font-size:14px;background:#f0f0f0;padding:4px 8px;border-radius:4px;display:inline-block}.badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:600}.badge-success{background:#d4edda;color:#155724}.badge-warning{background:#fff3cd;color:#856404}.badge-danger{background:#f8d7da;color:#721c24}.badge-info{background:#d1ecf1;color:#0c5460}.badge-secondary{background:#e2e3e5;color:#383d41}table{width:100%;border-collapse:collapse}td,th{padding:10px 12px;text-align:left;border-bottom:1px solid var(--color-border)}th{font-weight:600;background:#f8f9fa;font-size:14px}.search-bar{position:relative;width:100%}.search-bar input{width:100%;padding:12px 16px 12px 44px;border:2px solid var(--color-border);border-radius:24px;font-size:16px}.search-bar .search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);font-size:18px;color:var(--color-text-muted)}.alert{padding:12px 16px;border-radius:8px;margin-bottom:12px;font-size:14px}.alert-info{background:#d1ecf1;color:#0c5460}.alert-success{background:#d4edda;color:#155724}.alert-warning{background:#fff3cd;color:#856404}.alert-danger{background:#f8d7da;color:#721c24}.loading{display:inline-block;width:20px;height:20px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.admin-layout{display:flex;min-height:100vh}.admin-sidebar{width:240px;background:#2d3436;color:white;padding:16px 0;position:fixed;top:0;left:0;bottom:0;overflow-y:auto}.admin-sidebar a{display:block;padding:12px 24px;color:#b2bec3;text-decoration:none;font-size:14px}.admin-sidebar a.active,.admin-sidebar a:hover{background:rgba(255,255,255,.1);color:white}.admin-content{flex:1 1;margin-left:240px;padding:24px}.grid-2{grid-template-columns:repeat(2,1fr);grid-gap:12px}.grid-2,.grid-3{display:grid;gap:12px}.grid-3{grid-template-columns:repeat(3,1fr);grid-gap:12px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:12px;gap:12px}@media (max-width:768px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.admin-sidebar{display:none}.admin-content{margin-left:0}}.quantity-input{display:flex;align-items:center;gap:0}.quantity-input button{width:40px;height:40px;border:2px solid var(--color-border);background:white;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center}.quantity-input button:first-child{border-radius:8px 0 0 8px}.quantity-input button:last-child{border-radius:0 8px 8px 0}.quantity-input input{width:70px;height:40px;border:2px solid var(--color-border);border-left:none;border-right:none;text-align:center;font-size:16px}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}