/* ============================================
   WooCommerce Product Filter Pro - Stylesheet
   ============================================ */
:root {
    --wpf-primary: #2563eb;
    --wpf-primary-hover: #1d4ed8;
    --wpf-accent: #f59e0b;
    --wpf-danger: #ef4444;
    --wpf-success: #10b981;
    --wpf-bg: #f8fafc;
    --wpf-surface: #ffffff;
    --wpf-border: #e2e8f0;
    --wpf-text: #1e293b;
    --wpf-text-muted: #64748b;
    --wpf-radius: 10px;
    --wpf-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
    --wpf-shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -1px rgba(0,0,0,.04);
}

/* Layout */
.wpf-wrapper { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: var(--wpf-text); }
.wpf-layout { display: grid; grid-template-columns: 280px 1fr; gap: 24px; align-items: start; }

/* Sidebar */
.wpf-sidebar {
    background: var(--wpf-surface);
    border: 1px solid var(--wpf-border);
    border-radius: var(--wpf-radius);
    padding: 20px;
    box-shadow: var(--wpf-shadow);
    position: sticky;
    top: 80px;
}
.wpf-sidebar-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; padding-bottom: 14px; border-bottom: 2px solid var(--wpf-border); }
.wpf-sidebar-header h3 { margin: 0; font-size: 16px; font-weight: 700; color: var(--wpf-text); }

/* Filter blocks */
.wpf-filter-block { margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--wpf-border); }
.wpf-filter-block:last-of-type { border-bottom: none; margin-bottom: 16px; }
.wpf-filter-label { display: block; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--wpf-text-muted); margin-bottom: 10px; }

/* Search */
.wpf-search-wrap { position: relative; }
.wpf-search-icon { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); pointer-events: none; font-size: 14px; }
.wpf-input { width: 100%; padding: 9px 36px 9px 12px; border: 1.5px solid var(--wpf-border); border-radius: 8px; font-size: 14px; color: var(--wpf-text); transition: border-color .2s; box-sizing: border-box; background: var(--wpf-bg); }
.wpf-input:focus { outline: none; border-color: var(--wpf-primary); background: #fff; }

/* Checkboxes */
.wpf-cat-list, .wpf-subcat-list { list-style: none; margin: 0; padding: 0; }
.wpf-subcat-list { margin-left: 18px; margin-top: 6px; }
.wpf-cat-item { margin-bottom: 6px; }
.wpf-checkbox-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; padding: 3px 0; user-select: none; }
.wpf-checkbox-label input[type="checkbox"] { display: none; }
.wpf-checkmark { width: 16px; height: 16px; border: 2px solid var(--wpf-border); border-radius: 4px; flex-shrink: 0; transition: all .2s; position: relative; }
.wpf-checkbox-label input:checked ~ .wpf-checkmark { background: var(--wpf-primary); border-color: var(--wpf-primary); }
.wpf-checkbox-label input:checked ~ .wpf-checkmark::after { content: ''; position: absolute; left: 3px; top: 0px; width: 5px; height: 9px; border: 2px solid #fff; border-top: none; border-left: none; transform: rotate(45deg); }
.wpf-cat-name { flex: 1; }
.wpf-cat-count { color: var(--wpf-text-muted); font-size: 12px; }
.wpf-attr-list { display: flex; flex-direction: column; gap: 4px; }

/* Price slider */
.wpf-price-inputs { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.wpf-price-input { padding: 8px 10px; font-size: 13px; text-align: center; }
.wpf-price-sep { color: var(--wpf-text-muted); font-weight: 700; flex-shrink: 0; }
.wpf-slider-wrap { position: relative; padding: 10px 0; }
.wpf-slider-track { position: relative; height: 4px; background: var(--wpf-border); border-radius: 4px; margin: 0 8px; }
.wpf-slider-range { position: absolute; height: 100%; background: var(--wpf-primary); border-radius: 4px; }
.wpf-range { position: absolute; width: 100%; top: -6px; -webkit-appearance: none; appearance: none; background: transparent; pointer-events: none; height: 16px; }
.wpf-range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 2px solid var(--wpf-primary); cursor: pointer; pointer-events: auto; box-shadow: 0 1px 4px rgba(0,0,0,.15); }
.wpf-range::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 2px solid var(--wpf-primary); cursor: pointer; pointer-events: auto; }
.wpf-price-labels { display: flex; justify-content: space-between; font-size: 12px; color: var(--wpf-text-muted); margin-top: 8px; }

/* Buttons */
.wpf-btn-apply { width: 100%; padding: 11px; background: var(--wpf-primary); color: #fff; border: none; border-radius: 8px; font-size: 14px; font-weight: 700; cursor: pointer; transition: background .2s; }
.wpf-btn-apply:hover { background: var(--wpf-primary-hover); }
.wpf-btn-reset { background: none; border: 1px solid var(--wpf-border); border-radius: 6px; padding: 4px 10px; font-size: 12px; color: var(--wpf-text-muted); cursor: pointer; transition: all .2s; }
.wpf-btn-reset:hover { border-color: var(--wpf-danger); color: var(--wpf-danger); }

/* Main area */
.wpf-main {}
.wpf-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; background: var(--wpf-surface); border: 1px solid var(--wpf-border); border-radius: var(--wpf-radius); margin-bottom: 16px; }
.wpf-found-count { font-size: 14px; color: var(--wpf-text-muted); }
.wpf-found-count strong { color: var(--wpf-text); }
.wpf-orderby-wrap { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.wpf-select { padding: 6px 10px; border: 1.5px solid var(--wpf-border); border-radius: 8px; font-size: 14px; cursor: pointer; background: var(--wpf-bg); }
.wpf-select:focus { outline: none; border-color: var(--wpf-primary); }

/* Products grid */
.wpf-products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.wpf-layout[data-columns="2"] .wpf-products-grid,
.wpf-wrapper[data-columns="2"] .wpf-products-grid { grid-template-columns: repeat(2, 1fr); }
.wpf-layout[data-columns="4"] .wpf-products-grid,
.wpf-wrapper[data-columns="4"] .wpf-products-grid { grid-template-columns: repeat(4, 1fr); }

/* Product card — giống giao diện theme web300k */
.wpf-product-card { background: var(--wpf-surface); border: 1px solid var(--wpf-border); border-radius: var(--wpf-radius); overflow: hidden; transition: box-shadow .2s, transform .2s; position: relative; }
.wpf-product-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,.1); transform: translateY(-3px); }
.wpf-badge-sale, .wpf-badge-outofstock { position: absolute; top: 10px; left: 10px; z-index: 2; padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 700; text-transform: uppercase; }
.wpf-badge-sale { background: var(--wpf-danger); color: #fff; }
.wpf-badge-outofstock { background: var(--wpf-text-muted); color: #fff; top: 10px; left: auto; right: 10px; }
.wpf-product-img-wrap { display: block; aspect-ratio: 4/3; overflow: hidden; background: var(--wpf-bg); }
.wpf-product-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.wpf-product-card:hover .wpf-product-img-wrap img { transform: scale(1.04); }
.wpf-product-info { padding: 14px 14px 16px; }
.wpf-product-cat { display: block; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .6px; color: var(--wpf-text-muted); margin-bottom: 5px; }
.wpf-product-title { margin: 0 0 8px; font-size: 14px; font-weight: 600; line-height: 1.45; min-height: 40px; }
.wpf-product-title a { color: var(--wpf-text); text-decoration: none; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.wpf-product-title a:hover { color: var(--wpf-primary); }
.wpf-product-price { margin-bottom: 12px; font-size: 15px; font-weight: 700; color: var(--wpf-danger); line-height: 1.3; }
.wpf-product-price del { color: var(--wpf-text-muted); font-weight: 400; font-size: 13px; display: block; }
.wpf-product-price ins { text-decoration: none; }
.wpf-btn-demo { display: block; width: 100%; padding: 10px 16px; background: #e8660a; color: #fff !important; border: none; border-radius: 6px; font-size: 13px; font-weight: 700; text-align: center; text-decoration: none !important; cursor: pointer; transition: background .2s, transform .15s; box-sizing: border-box; }
.wpf-btn-demo:hover { background: #c7550a; color: #fff !important; transform: translateY(-1px); }

/* Loading */
.wpf-loading-init, .wpf-loading-overlay { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 60px 20px; color: var(--wpf-text-muted); gap: 12px; }
.wpf-spinner { width: 36px; height: 36px; border: 3px solid var(--wpf-border); border-top-color: var(--wpf-primary); border-radius: 50%; animation: wpf-spin .7s linear infinite; }
@keyframes wpf-spin { to { transform: rotate(360deg); } }
.wpf-results.is-loading { position: relative; min-height: 200px; pointer-events: none; opacity: .5; }

/* No results */
.wpf-no-results { text-align: center; padding: 60px 20px; color: var(--wpf-text-muted); }
.wpf-no-results-icon { font-size: 48px; display: block; margin-bottom: 12px; }

/* Pagination */
.wpf-pagination { display: flex; gap: 6px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.wpf-page-btn { padding: 8px 14px; border: 1.5px solid var(--wpf-border); border-radius: 8px; background: var(--wpf-surface); cursor: pointer; font-size: 14px; transition: all .2s; }
.wpf-page-btn:hover, .wpf-page-btn.active { background: var(--wpf-primary); border-color: var(--wpf-primary); color: #fff; }

/* Mobile */
@media (max-width: 768px) {
    .wpf-layout { grid-template-columns: 1fr; }
    .wpf-sidebar { position: static; }
    .wpf-products-grid { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 480px) {
    .wpf-products-grid { grid-template-columns: 1fr !important; }
}