:root{--primary:#0066cc;--primary-dark:#004d99;--accent:#ff6600;--bg:#f5f7fa;--border:#e5e7eb;--shadow:0 2px 12px rgba(0,0,0,.08);--radius:10px}
*{box-sizing:border-box}
body{font-family:'Be Vietnam Pro',sans-serif;background:var(--bg);color:#1a1a2e;font-size:14px}
.logo-text{font-size:22px;line-height:1}.fw-black{font-weight:900}
.topbar{background:#1a1a2e}
.main-header{z-index:1030}
.search-cat{width:140px!important;border-radius:8px 0 0 8px!important;background:#f3f4f6;font-size:13px}
.icon-btn{display:flex;flex-direction:column;align-items:center;text-decoration:none;font-size:11px;color:#6b7280;transition:color .2s}
.icon-btn:hover{color:var(--primary)}
.cart-badge{position:absolute;top:-5px;right:-5px;background:var(--accent);color:#fff;border-radius:50%;width:18px;height:18px;font-size:10px;display:flex;align-items:center;justify-content:center;font-weight:700}
.cat-nav{background:var(--primary)}.cat-nav .nav-link{font-size:13px;transition:background .2s;white-space:nowrap}.cat-nav .nav-link:hover{background:rgba(255,255,255,.15);border-radius:4px}.text-white-75{color:rgba(255,255,255,.85)!important}
.card{border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.product-img{height:200px;object-fit:cover;border-radius:var(--radius) var(--radius) 0 0;width:100%}
.product-price{color:var(--accent);font-weight:700;font-size:16px}
.price-retail{color:#9ca3af;text-decoration:line-through;font-size:12px}
.moq-tag{background:#fff3cd;color:#856404;font-size:11px;padding:2px 8px;border-radius:4px;display:inline-block}
.wish-btn{position:absolute;top:10px;right:10px;background:#fff;border:none;border-radius:50%;width:32px;height:32px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,0,0,.15);cursor:pointer;transition:all .2s}
.wish-btn:hover{background:#fee2e2;color:#dc3545}
.vendor-logo{width:60px;height:60px;object-fit:cover;border-radius:8px;border:1px solid var(--border)}
.rating-stars{color:#fbbf24}
.stat-card{border-radius:var(--radius);padding:20px;color:#fff}
.stat-card.blue{background:linear-gradient(135deg,#0066cc,#004d99)}
.stat-card.green{background:linear-gradient(135deg,#28a745,#1e7e34)}
.stat-card.orange{background:linear-gradient(135deg,#ff6600,#cc5200)}
.stat-card.red{background:linear-gradient(135deg,#dc3545,#bd2130)}
.stat-card .val{font-size:26px;font-weight:800}.stat-card .lbl{opacity:.85;font-size:13px}
.admin-sidebar{width:240px;min-height:100vh;background:#1a1a2e;position:fixed;top:0;left:0;z-index:1000;overflow-y:auto}
.admin-sidebar .nav-link{color:rgba(255,255,255,.7);padding:10px 20px;font-size:14px;transition:all .2s;border-radius:0}
.admin-sidebar .nav-link:hover,.admin-sidebar .nav-link.active{color:#fff;background:rgba(255,255,255,.1)}
.admin-sidebar .nav-link i{width:20px}
.vendor-sidebar{background:#0f3460}
.sidebar-brand{padding:20px;border-bottom:1px solid rgba(255,255,255,.1)}
.sidebar-group{padding:8px 20px 4px;font-size:10px;color:rgba(255,255,255,.4);text-transform:uppercase;letter-spacing:1px}
.page-content{margin-left:240px;padding:24px;min-height:100vh}
.btn{border-radius:8px;font-weight:500}.btn-primary{background:var(--primary);border-color:var(--primary)}.btn-primary:hover{background:var(--primary-dark)}
.form-control,.form-select{border-radius:8px;border-color:var(--border);font-size:14px}.form-control:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,102,204,.15)}
.table{font-size:13px}.table thead th{background:#f8f9fa;font-weight:600}.table-hover tbody tr:hover{background:#f0f5ff}
.badge{font-size:11px;font-weight:500}
.pagination .page-link{color:var(--primary);border-radius:6px;margin:0 2px}.pagination .page-item.active .page-link{background:var(--primary);border-color:var(--primary)}
.order-timeline{position:relative;padding-left:28px}.order-timeline::before{content:'';position:absolute;left:8px;top:0;bottom:0;width:2px;background:var(--border)}.tl-item{position:relative;margin-bottom:16px}.tl-dot{position:absolute;left:-24px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--primary);border:2px solid #fff;box-shadow:0 0 0 2px var(--primary)}
.chat-box{height:380px;overflow-y:auto;background:#f9fafb;border:1px solid var(--border);border-radius:var(--radius);padding:15px}
.chat-msg{max-width:70%;margin-bottom:10px}.chat-msg.sent{margin-left:auto}.chat-bubble{padding:9px 14px;border-radius:14px;font-size:13px}.chat-msg.sent .chat-bubble{background:var(--primary);color:#fff;border-bottom-right-radius:3px}.chat-msg.received .chat-bubble{background:#fff;border:1px solid var(--border);border-bottom-left-radius:3px}
.footer a{transition:color .2s}.footer a:hover{color:#fff!important}
.section-title{border-left:4px solid var(--primary);padding-left:12px;font-weight:700}
@media(max-width:768px){.admin-sidebar{transform:translateX(-100%);transition:.3s}.admin-sidebar.open{transform:translateX(0)}.page-content{margin-left:0}.search-cat{display:none}}

/* ===== INSTANT SEARCH ===== */
.search-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0; right: 0;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,.15);
    z-index: 9999;
    overflow: hidden;
    border: 1px solid #e5e7eb;
    max-height: 520px;
    overflow-y: auto;
}
.sd-section { padding: 8px 0; }
.sd-section-title { padding: 6px 14px 4px; font-size:11px; font-weight:700; color:#9ca3af; text-transform:uppercase; letter-spacing:.5px; }
.sd-item { display:flex; align-items:center; gap:10px; padding:8px 14px; cursor:pointer; transition:background .15s; text-decoration:none; color:inherit; }
.sd-item:hover { background:#f0f5ff; }
.sd-item img { width:44px; height:44px; object-fit:cover; border-radius:8px; flex-shrink:0; border:1px solid #eee; }
.sd-item-name { font-size:13px; font-weight:600; line-height:1.3; color:#1a1a2e; }
.sd-item-sub  { font-size:11px; color:#9ca3af; margin-top:1px; }
.sd-item-price { font-size:13px; font-weight:700; color:#e53e3e; white-space:nowrap; }
.sd-item-price-old { font-size:11px; color:#9ca3af; text-decoration:line-through; }
.sd-footer { padding:10px 14px; background:#f8f9fa; border-top:1px solid #eee; text-align:center; font-size:13px; font-weight:600; color:#0066cc; cursor:pointer; transition:background .15s; }
.sd-footer:hover { background:#e8f0fe; }
.sd-loading { padding:20px; text-align:center; color:#9ca3af; font-size:13px; }
.sd-empty { padding:20px; text-align:center; color:#9ca3af; font-size:13px; }
.sd-divider { height:1px; background:#f3f4f6; margin:4px 0; }
.search-highlight { color:#0066cc; font-weight:700; }

/* Pulse animation cho "đang xem" */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .5; }
}
.animate-pulse { animation: pulse 1.5s ease-in-out infinite; }