/* ==========================================================================
   Theme Default — toàn bộ màu sắc lấy từ biến CSS do ThemeManager sinh ra,
   nên 9 theme còn lại có thể tái sử dụng file này mà vẫn khác nhau hoàn toàn.
   Ưu tiên: CSS nhẹ, không framework, tối ưu Core Web Vitals (CLS/LCP).
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-body,system-ui,sans-serif);font-size:15px;line-height:1.6;
  color:var(--color-text,#1d1d1f);background:var(--color-bg,#f5f5f7)}
h1,h2,h3,h4{font-family:var(--font-heading,inherit);line-height:1.25;margin:0 0 .5em}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{max-width:var(--container,1280px);margin:0 auto;padding:0 16px;width:100%}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- Nút ---------- */
.btn{display:inline-block;padding:10px 18px;border:1px solid var(--color-border,#e5e5ea);
  background:var(--color-surface,#fff);border-radius:var(--radius,8px);cursor:pointer;
  font-size:14px;text-align:center;transition:filter .15s}
.btn:hover{filter:brightness(.97)}
.btn-primary{background:var(--color-primary,#d70018);border-color:var(--color-primary,#d70018);color:#fff}
.btn-lg{padding:13px 26px;font-size:16px;font-weight:600}
.btn-block{display:block;width:100%}
.btn-ghost{background:transparent}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- Header ---------- */
.site-header{background:var(--color-surface,#fff);box-shadow:var(--shadow,0 1px 3px rgba(0,0,0,.08));
  position:sticky;top:0;z-index:50}
.topbar{background:var(--color-secondary,#1a1a1a);color:#fff;font-size:12.5px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;
  gap:12px;height:34px;overflow:hidden}
.topbar-menu{display:flex;gap:16px}
.header-main .container{display:flex;align-items:center;gap:20px;padding-top:14px;padding-bottom:14px}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:36px;height:36px;
  border:0;background:transparent;padding:0;cursor:pointer;flex-shrink:0}
.nav-toggle span{display:block;width:24px;height:2.5px;background:var(--color-text,#1d1d1f);border-radius:2px}
.logo img{max-height:48px;width:auto}
.logo-text{font-size:20px;font-weight:700;color:var(--color-primary,#d70018)}
.search-box{flex:1;max-width:560px;position:relative;display:flex}
.search-box input{flex:1;padding:11px 14px;border:2px solid var(--color-primary,#d70018);
  border-radius:var(--radius,8px) 0 0 var(--radius,8px);border-right:0;min-width:0}
.search-box button{padding:0 22px;background:var(--color-primary,#d70018);color:#fff;border:0;
  border-radius:0 var(--radius,8px) var(--radius,8px) 0;cursor:pointer}
.search-suggest{position:absolute;top:100%;left:0;right:0;background:#fff;border:1px solid var(--color-border);
  border-radius:0 0 var(--radius) var(--radius);z-index:60;max-height:420px;overflow:auto}
.search-suggest a{display:flex;gap:10px;padding:9px 12px;align-items:center;border-bottom:1px solid #f2f2f2}
.search-suggest img{width:44px;height:44px;object-fit:cover;border-radius:6px}
.header-actions{margin-left:auto;display:flex;gap:20px;align-items:center;white-space:nowrap}
.hotline{display:flex;flex-direction:column;line-height:1.25}
.hotline strong{color:var(--color-primary,#d70018)}
.hotline small{color:var(--color-muted,#6e6e73);font-size:11.5px}
.cart-link{position:relative;font-weight:600}
.cart-count{display:inline-block;min-width:20px;height:20px;line-height:20px;text-align:center;
  background:var(--color-primary,#d70018);color:#fff;border-radius:99px;font-size:11.5px;padding:0 6px}

/* ---------- Menu chính ---------- */
.main-nav{background:var(--color-primary,#d70018)}
.nav-list{display:flex;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav-list>li{position:relative}
.nav-list>li>a{display:block;padding:12px 16px;color:#fff;font-weight:500;font-size:14.5px}
.nav-list>li:hover>a{background:rgba(0,0,0,.14)}
.sub-menu{display:none;position:absolute;top:100%;left:0;min-width:230px;background:#fff;list-style:none;
  margin:0;padding:6px 0;box-shadow:0 8px 24px rgba(0,0,0,.14);border-radius:0 0 var(--radius) var(--radius);z-index:60}
.nav-list>li:hover .sub-menu{display:block}
.sub-menu a{display:block;padding:8px 16px;font-size:14px}
.sub-menu a:hover{background:var(--color-bg,#f5f5f7);color:var(--color-primary)}

/* ---------- Breadcrumb ---------- */
.breadcrumb{background:var(--color-surface,#fff);border-top:1px solid var(--color-border,#eee);
  font-size:13px;padding:9px 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumb li+li::before{content:"›";margin-right:6px;color:var(--color-muted)}
.breadcrumb a{color:var(--color-muted,#6e6e73)}
.breadcrumb a:hover{color:var(--color-primary)}

/* ---------- Bố cục section ---------- */
.section{padding:28px 0}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:12px}
.section-title{font-size:21px;margin:0}
.view-all{color:var(--color-primary,#d70018);font-size:14px}

/* ---------- Lưới sản phẩm ---------- */
.product-grid{display:grid;grid-template-columns:repeat(var(--grid-cols,4),1fr);gap:16px}
.product-card{background:var(--color-surface,#fff);border:1px solid var(--color-border,#e5e5ea);
  border-radius:var(--radius,8px);overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow .18s,transform .18s}
.product-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.1);transform:translateY(-2px)}
/* Khối trang chủ: lưới 5 cột, khoảng cách rộng hơn ở màn hình lớn */
.product-grid--5{grid-template-columns:repeat(5,minmax(0,1fr));gap:20px}
.home-mini .section-title{position:relative;padding-left:12px}
.home-mini .section-title::before{content:"";position:absolute;left:0;top:12%;bottom:12%;width:4px;border-radius:2px;background:var(--color-primary,#d70018)}
@media (max-width:1200px){.product-grid--5{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}}
@media (max-width:1024px){.product-grid--5{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:768px){.product-grid--5{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}}
.pc-thumb{position:relative;display:block;aspect-ratio:1/1;background:#fafafa}
.pc-thumb img{width:100%;height:100%;object-fit:contain}
.pc-badge{position:absolute;top:8px;left:8px;padding:3px 8px;border-radius:99px;
  font-size:11.5px;font-weight:600;color:#fff}
.pc-badge.sale{background:var(--color-sale,#d70018)}
.pc-badge.new{background:var(--color-accent,#ff6b00);left:auto;right:8px}
.pc-body{padding:12px;display:flex;flex-direction:column;gap:7px;flex:1}
.pc-name{font-size:14px;font-weight:500;margin:0;line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.8em}
.pc-price{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.price-final{color:var(--color-sale,#d70018);font-weight:700;font-size:16px}
.price-old{color:var(--color-muted,#6e6e73);font-size:13px}
.pc-rating{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--color-muted)}
.btn-add-cart{margin-top:auto;padding:8px;border:1px solid var(--color-primary,#d70018);
  background:transparent;color:var(--color-primary,#d70018);border-radius:6px;cursor:pointer;font-size:13.5px}
.btn-add-cart:hover{background:var(--color-primary,#d70018);color:#fff}

/* Sao đánh giá — dùng gradient + mask, không cần font icon */
.stars{display:inline-block;width:76px;height:14px;
  background:linear-gradient(90deg,#f59e0b var(--r,0%),#d1d5db var(--r,0%));
  -webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 16'><g fill='black'><path d='M8 1l2 4.2 4.6.6-3.4 3.2.8 4.6L8 11.4 3.9 13.6l.8-4.6L1.3 5.8 6 5.2z'/><path d='M24 1l2 4.2 4.6.6-3.4 3.2.8 4.6L24 11.4l-4.1 2.2.8-4.6-3.4-3.2 4.6-.6z'/><path d='M40 1l2 4.2 4.6.6-3.4 3.2.8 4.6L40 11.4l-4.1 2.2.8-4.6-3.4-3.2 4.6-.6z'/><path d='M56 1l2 4.2 4.6.6-3.4 3.2.8 4.6L56 11.4l-4.1 2.2.8-4.6-3.4-3.2 4.6-.6z'/><path d='M72 1l2 4.2 4.6.6-3.4 3.2.8 4.6L72 11.4l-4.1 2.2.8-4.6-3.4-3.2 4.6-.6z'/></g></svg>") no-repeat;
  mask-size:contain;-webkit-mask-size:contain;vertical-align:middle}

/* ---------- Hero / slideshow ---------- */
.hero{padding:16px 0}
.slideshow{position:relative;border-radius:var(--radius,8px);overflow:hidden;
  aspect-ratio:1920/600;background:#eee}
.slide{display:none;position:absolute;inset:0}
.slide.active{display:block}
.slide img{width:100%;height:100%;object-fit:cover}

/* ---------- Điểm mạnh (USP) ---------- */
.strengths{background:var(--color-surface,#fff);padding:18px 0;margin:16px 0}
.strengths-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}
.strength-item{display:flex;gap:12px;align-items:center}
.strength-item img{width:44px;height:44px;flex-shrink:0}
.strength-item p{margin:2px 0 0;font-size:12.5px;color:var(--color-muted,#6e6e73)}

/* ---------- Danh mục + bộ lọc ---------- */
.category-layout{display:grid;grid-template-columns:250px 1fr;gap:22px;padding:20px 0;align-items:start}
.sidebar-filter{background:var(--color-surface,#fff);border-radius:var(--radius,8px);
  padding:16px;position:sticky;top:120px}
.filter-box{margin-bottom:18px;padding-bottom:16px;border-bottom:1px solid var(--color-border,#eee)}
.filter-box:last-of-type{border-bottom:0}
.filter-box h3{font-size:14.5px;margin:0 0 10px}
.filter-list{list-style:none;margin:0;padding:0;font-size:14px;line-height:2}
.filter-check{display:flex;align-items:center;gap:8px;font-size:13.5px;padding:3px 0;cursor:pointer}
.filter-check small{color:var(--color-muted,#6e6e73)}
.price-range{display:flex;gap:8px}
.price-range input{width:100%;padding:7px 9px;border:1px solid var(--color-border,#e5e5ea);
  border-radius:6px;min-width:0}
.page-title{font-size:24px;margin:0 0 10px}
.cat-desc{color:var(--color-muted,#6e6e73);margin-bottom:14px;font-size:14px}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;
  background:var(--color-surface,#fff);padding:10px 14px;border-radius:var(--radius,8px);margin-bottom:16px}
.toolbar select{padding:7px 10px;border:1px solid var(--color-border,#e5e5ea);border-radius:6px}
.empty{background:var(--color-surface,#fff);padding:36px;text-align:center;border-radius:var(--radius,8px)}
.cat-seo-content{background:var(--color-surface,#fff);padding:20px;border-radius:var(--radius,8px);
  margin-top:24px;font-size:14.5px}

/* ---------- Chi tiết sản phẩm ---------- */
.product-detail{padding:20px 0}
.pd-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;
  background:var(--color-surface,#fff);padding:22px;border-radius:var(--radius,8px)}
.pd-main-image{aspect-ratio:1/1;background:#fafafa;border-radius:var(--radius,8px);overflow:hidden}
.pd-main-image img{width:100%;height:100%;object-fit:contain}
.pd-thumbs{display:flex;gap:8px;margin-top:10px;overflow-x:auto;padding-bottom:4px}
.pd-thumbs .thumb{border:2px solid transparent;background:none;padding:0;cursor:pointer;
  border-radius:6px;overflow:hidden;flex-shrink:0}
.pd-thumbs .thumb.active{border-color:var(--color-primary,#d70018)}
.pd-thumbs img{width:72px;height:72px;object-fit:cover}
.pd-name{font-size:23px;margin:0 0 10px}
.pd-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--color-muted,#6e6e73);
  margin-bottom:14px}
.pd-rating{display:flex;align-items:center;gap:6px}
.pd-price-box{background:var(--color-bg,#f5f5f7);padding:14px 16px;border-radius:var(--radius,8px);
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.pd-price-box .price-final{font-size:28px}
.price-save{font-size:13px;color:var(--color-accent,#ff6b00)}
.pd-stock{font-size:14px;margin:0 0 12px}
.pd-stock.in{color:#16a34a}
.pd-stock.out{color:#dc2626}
.pd-short{font-size:14.5px;margin-bottom:16px;color:#444}
.pd-short p{margin:0 0 6px}
.pd-short ul,.pd-short ol{margin:0 0 6px;padding-left:18px}
.pd-short li{margin:2px 0}
.pd-short-wrap{margin-bottom:16px}
.pd-short-wrap .pd-short{margin-bottom:4px}
.pd-short-wrap.is-collapsible .pd-short{max-height:9em;overflow:hidden;position:relative}
.pd-short-wrap.is-collapsible .pd-short::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2.5em;background:linear-gradient(rgba(255,255,255,0),#fff)}
.pd-short-toggle{position:absolute;opacity:0;pointer-events:none}
.pd-short-toggle:checked ~ .pd-short{max-height:none}
.pd-short-toggle:checked ~ .pd-short::after{display:none}
.pd-highlights h3{font-size:16.5px;margin:0 0 8px}
.pd-highlights ul{margin:0 0 12px;padding-left:20px}
.pd-highlights li{margin:5px 0;line-height:1.6}
.pd-desc-wrap{position:relative}
.pd-desc-wrap.is-collapsible .pd-desc-full{max-height:26em;overflow:hidden;position:relative}
.pd-desc-wrap.is-collapsible .pd-desc-full::after{content:"";position:absolute;left:0;right:0;bottom:0;height:4em;background:linear-gradient(rgba(255,255,255,0),#fff)}
.pd-desc-wrap.is-collapsible .pd-short-toggle:checked ~ .pd-desc-full{max-height:none}
.pd-desc-wrap.is-collapsible .pd-short-toggle:checked ~ .pd-desc-full::after{display:none}
.pd-desc-wrap:not(.is-collapsible) .pd-desc-full{display:none}
.pd-desc-wrap:not(.is-collapsible) .pd-short-toggle:checked ~ .pd-desc-full{display:block}
.pd-desc-more::before{content:"Xem chi tiết \25BE"}
.pd-desc-wrap .pd-short-toggle:checked ~ .pd-desc-more::before{content:"Thu gọn \25B4"}
.pd-short-more{display:inline-block;cursor:pointer;font-size:13.5px;font-weight:500;color:var(--color-primary,#d70018)}
.pd-short-more::before{content:"Xem thêm \25BE"}
.pd-short-toggle:checked ~ .pd-short-more::before{content:"Thu gọn \25B4"}
.pd-short-toggle:focus-visible ~ .pd-short-more{outline:2px solid var(--color-primary,#d70018);outline-offset:2px}
.pd-spec-quick{width:100%;border-collapse:collapse;margin-bottom:16px;font-size:14px}
.pd-spec-quick th,.pd-spec-quick td{padding:8px 10px;border-bottom:1px solid var(--color-border,#e5e5ea);text-align:left}
.pd-spec-quick th{width:38%;font-weight:500;color:var(--color-muted,#6e6e73)}
.pd-spec-quick tr:last-child th,.pd-spec-quick tr:last-child td{border-bottom:0}
.pd-promo{margin:0;padding-left:18px;list-style:disc}
.pd-promo li{margin:2px 0}
.pd-variants h3{font-size:14.5px;margin-bottom:8px}
.variant-list{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.variant{display:inline-flex;align-items:center;gap:7px;padding:8px 14px;
  border:1px solid var(--color-border,#e5e5ea);background:#fff;border-radius:6px;cursor:pointer;font-size:13.5px}
.variant.active{border-color:var(--color-primary,#d70018);color:var(--color-primary,#d70018);
  box-shadow:0 0 0 1px var(--color-primary,#d70018) inset}
.variant i{width:16px;height:16px;border-radius:50%;border:1px solid rgba(0,0,0,.12)}
.pd-buy{display:flex;gap:10px;align-items:stretch;flex-wrap:wrap;margin-bottom:16px}
.qty-box{display:flex;border:1px solid var(--color-border,#e5e5ea);border-radius:6px;overflow:hidden}
.qty-box button{width:38px;border:0;background:#f5f5f7;cursor:pointer;font-size:17px}
.qty-box input{width:56px;text-align:center;border:0;border-left:1px solid var(--color-border);
  border-right:1px solid var(--color-border)}
.btn-buy-now{background:var(--color-accent,#ff6b00);color:#fff;border-color:var(--color-accent,#ff6b00);
  padding:13px 26px;font-weight:600}
.pd-policy{list-style:none;padding:14px;margin:0;background:var(--color-bg,#f5f5f7);
  border-radius:var(--radius,8px);font-size:13.5px}
.pd-policy li{padding:3px 0}
.pd-body{margin-top:22px;background:var(--color-surface,#fff);padding:22px;border-radius:var(--radius,8px)}
.tabs .tab-nav{display:flex;gap:4px;border-bottom:2px solid var(--color-border,#eee);
  margin-bottom:18px;flex-wrap:wrap}
.tabs .tab-nav button{background:none;border:0;padding:11px 18px;cursor:pointer;font-size:15px;
  color:var(--color-muted,#6e6e73);border-bottom:2px solid transparent;margin-bottom:-2px}
.tabs .tab-nav button.active{color:var(--color-primary,#d70018);
  border-bottom-color:var(--color-primary,#d70018);font-weight:600}
.tab-panel{display:none}
.tab-panel.active{display:block}
.rich-text{font-size:15px;line-height:1.75}
.rich-text img{border-radius:6px;margin:14px 0}
.rich-text h2{font-size:19px;margin-top:24px}
.rich-text h3{font-size:16.5px;margin-top:18px}
.rich-text table{width:100%;border-collapse:collapse;margin:14px 0}
.rich-text th,.rich-text td{border:1px solid var(--color-border,#e5e5ea);padding:9px 12px;text-align:left}
.spec-table{width:100%;border-collapse:collapse}
.spec-table th{width:35%;background:var(--color-bg,#f5f5f7);text-align:left;font-weight:500}
.spec-table th,.spec-table td{border:1px solid var(--color-border,#e5e5ea);padding:10px 12px}

/* ---------- Đánh giá & hỏi đáp ---------- */
.review-item{border-bottom:1px solid var(--color-border,#eee);padding:14px 0}
.review-item header{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:13.5px;margin-bottom:6px}
.verified{background:#dcfce7;color:#166534;padding:1px 8px;border-radius:99px;font-size:11.5px}
.review-item time{color:var(--color-muted,#6e6e73);font-size:12.5px;margin-left:auto}
.review-reply{background:var(--color-bg,#f5f5f7);padding:10px 12px;border-radius:6px;
  margin-top:8px;font-size:13.5px}
.review-form,.qa-form{margin-top:22px;padding-top:20px;border-top:1px solid var(--color-border,#eee);
  display:flex;flex-direction:column;gap:10px;max-width:600px}
.review-form input,.review-form textarea,.qa-form input,.qa-form textarea{
  padding:10px 12px;border:1px solid var(--color-border,#e5e5ea);border-radius:6px}
.rating-input{display:flex;flex-direction:row-reverse;justify-content:flex-end;gap:10px}
.rating-input label{cursor:pointer;font-size:13.5px}
.qa-item{padding:12px 0;border-bottom:1px solid var(--color-border,#eee)}
.qa-item .a{color:var(--color-muted,#6e6e73)}

/* ---------- Tin tức ---------- */
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.news-card{background:var(--color-surface,#fff);border-radius:var(--radius,8px);overflow:hidden;
  border:1px solid var(--color-border,#e5e5ea)}
.news-card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.news-card h3{font-size:15.5px;margin:12px 12px 6px;line-height:1.4}
.news-card p{margin:0 12px;font-size:13.5px;color:var(--color-muted,#6e6e73)}
.news-card time{display:block;padding:8px 12px 12px;font-size:12.5px;color:var(--color-muted,#6e6e73)}

/* ---------- Phân trang ---------- */
.pagination{display:flex;gap:6px;justify-content:center;margin:24px 0;flex-wrap:wrap}
.pagination a,.pagination span{padding:8px 14px;background:var(--color-surface,#fff);
  border:1px solid var(--color-border,#e5e5ea);border-radius:6px;font-size:14px}
.pagination .current{background:var(--color-primary,#d70018);border-color:var(--color-primary,#d70018);color:#fff}

/* ---------- Đối tác ---------- */
.partner-strip{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;align-items:center;
  padding:22px 0;opacity:.75}

/* ---------- Footer ---------- */
.site-footer{background:var(--color-secondary,#1a1a1a);color:#d8d8d8;margin-top:36px;font-size:13.5px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:26px;padding-top:34px;padding-bottom:34px}
.footer-col h3{color:#fff;font-size:15px;margin:0 0 12px}
.footer-col ul{list-style:none;margin:0;padding:0;line-height:2}
.footer-col a:hover{color:#fff;text-decoration:underline}
.socials{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:14px 0;font-size:12.5px;text-align:center}

/* ---------- Nổi bên phải: Zalo + Gọi điện ---------- */
.floating-contact{position:fixed;right:16px;bottom:40%;z-index:990;display:flex;flex-direction:column;gap:10px}
.floating-contact a{display:flex;align-items:center;justify-content:center;width:52px;height:52px;
  border-radius:50%;box-shadow:0 3px 10px rgba(0,0,0,.18);transition:transform .15s}
.floating-contact a:hover{transform:scale(1.08)}
.floating-contact .fc-zalo{background:#fff;border:1px solid var(--color-border,#e5e5ea)}
.floating-contact .fc-phone{background:#25d366;animation:fc-pulse 1.8s infinite}
@keyframes fc-pulse{0%{box-shadow:0 0 0 0 rgba(37,211,102,.5)}70%{box-shadow:0 0 0 12px rgba(37,211,102,0)}100%{box-shadow:0 0 0 0 rgba(37,211,102,0)}}
@media (max-width:768px){
  /* Mobile: vẫn hiện Zalo + Gọi, nằm hẳn trong màn hình và trên thanh đáy */
  .floating-contact{right:12px;bottom:calc(96px + env(safe-area-inset-bottom));gap:10px}
  .floating-contact a{width:46px;height:46px}
  .floating-contact .fc-zalo svg{width:40px;height:40px}
}

/* ---------- Thanh dính ---------- */
.mobile-bar{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--color-surface,#fff);
  border-top:1px solid var(--color-border,#e5e5ea);z-index:80}
.mobile-bar a{flex:1;text-align:center;padding:11px 4px;font-size:12.5px;
  border-right:1px solid var(--color-border,#e5e5ea)}
.mobile-bar a:last-child{border-right:0}
.sticky-atc{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--color-border);
  padding:10px 16px;display:flex;gap:12px;align-items:center;z-index:70;box-shadow:0 -3px 14px rgba(0,0,0,.1)}
.sticky-atc img{width:48px;height:48px;object-fit:cover;border-radius:6px}
.sticky-atc div{flex:1;display:flex;flex-direction:column;line-height:1.35;min-width:0}
.sticky-atc span{color:var(--color-sale,#d70018);font-weight:700}

/* Thanh MUA NGAY / THÊM VÀO GIỎ HÀNG (trang sản phẩm, mobile) */
.pd-mobile-cta{display:none}
@media (max-width:768px){
  .pd-mobile-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:85;
    padding-bottom:env(safe-area-inset-bottom);background:#fff;box-shadow:0 -2px 10px rgba(0,0,0,.12)}
  .pd-mobile-cta button{flex:1;border:0;min-height:50px;padding:0 8px;color:#fff;font-size:14px;font-weight:600;
    text-transform:uppercase;letter-spacing:.2px;cursor:pointer}
  .pd-mobile-cta .cta-buy{background:#e5582d}
  .pd-mobile-cta .cta-cart{background:#76b83c}
  .pd-mobile-cta button:disabled{opacity:.5;cursor:not-allowed}
  .sticky-atc{display:none !important}   /* thay bằng thanh MUA NGAY ở trên */
  body:has(.pd-mobile-cta){padding-bottom:calc(58px + env(safe-area-inset-bottom))}
}

/* ---------- Trang lỗi ---------- */
.error-page{text-align:center;padding:60px 16px}
.error-search{display:flex;gap:8px;max-width:420px;margin:20px auto}
.error-search input{flex:1;padding:11px 14px;border:1px solid var(--color-border);border-radius:6px}

/* ---------- Màn hình nhỏ ---------- */
@media (max-width:1024px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .category-layout{grid-template-columns:1fr}
  .sidebar-filter{position:static}
  .pd-top{grid-template-columns:1fr}
}
@media (max-width:768px){
  .topbar{display:none}
  .nav-toggle{display:flex}
  .main-nav{display:none}
  .main-nav.is-open{display:block;max-height:calc(100vh - 70px);overflow-y:auto}
  .main-nav .nav-list{flex-direction:column}
  .main-nav .nav-list>li{width:100%}
  .main-nav .nav-list>li>a{display:block;padding:13px 16px;border-bottom:1px solid rgba(255,255,255,.15)}
  .main-nav .sub-menu{position:static;box-shadow:none;background:rgba(0,0,0,.12);width:100%}
  .header-main .container{flex-wrap:wrap;gap:12px}
  .search-box{order:3;flex-basis:100%;max-width:none}
  .header-actions .hotline{display:none}
  .product-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .mobile-bar{display:flex}
  body{padding-bottom:46px}
  .section-title{font-size:18px}
  .pd-name{font-size:19px}
  .sticky-atc{bottom:46px}
}
@media (max-width:420px){
  .pc-name{font-size:13px}
  .price-final{font-size:15px}
}


/* =====================================================================
   30/09/2026 — Tối ưu giao diện điện thoại (≤ 768px)
   ===================================================================== */
.filter-details>summary{display:none}
.mobile-bar svg{width:22px;height:22px;fill:currentColor}
@media (max-width:768px){
  /* Lề 2 bên: các khối .container có class riêng từng đặt padding "20px 0" làm nội dung dính sát mép */
  .container.category-layout,.container.cart-page,.container.checkout-page{padding-left:16px;padding-right:16px}
  .product-detail>.section{padding:22px 16px 8px}
  .sidebar-filter{padding:0;background:none;border:0;box-shadow:none}

  /* Trang chủ: 4 cam kết xếp lưới 2x2 gọn */
  .strengths{padding:12px 0;margin:10px 0}
  .strengths-grid{grid-template-columns:1fr 1fr;gap:10px}
  .strength-item{align-items:flex-start;background:var(--color-bg,#f5f5f7);border-radius:8px;padding:10px}
  .strength-item strong{font-size:13.5px;line-height:1.3}
  .strength-item p{font-size:12px;line-height:1.35}

  /* Breadcrumb 1 dòng, trượt ngang */
  .breadcrumb ol{flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .breadcrumb ol::-webkit-scrollbar{display:none}

  /* Chi tiết sản phẩm */
  .pd-name{font-size:19px;line-height:1.35}
  .pd-promo-box,.pd-promo-box tbody,.pd-promo-box tr,.pd-promo-box th,.pd-promo-box td{display:block;width:auto}
  .pd-promo-box{border:1px dashed #f5a623;border-radius:8px;background:#fffaf0;padding:10px 12px}
  .pd-promo-box th{padding:0 0 6px;border:0;color:#d35400;font-weight:700}
  .pd-promo-box td{padding:0;border:0}
  .pd-buy{display:grid;grid-template-columns:auto 1fr;gap:10px}
  .pd-buy .btn-buy-now{grid-column:1/-1;min-height:46px;font-size:16px}
  .pd-buy .btn-primary{min-height:46px}
  .tabs .tab-nav{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .tabs .tab-nav::-webkit-scrollbar{display:none}
  .tabs .tab-nav button{flex-shrink:0;padding:10px 14px;font-size:14.5px}
  .rich-text img{max-width:100%;height:auto}
  .rich-text table{display:block;overflow-x:auto}

  /* Danh mục: khối lọc gập được */
  .category-layout{gap:12px;padding-top:12px}
  .filter-details{background:var(--color-surface,#fff);border-radius:8px;border:1px solid var(--color-border,#e5e5ea)}
  .filter-details>summary{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;font-weight:600;cursor:pointer;list-style:none}
  .filter-details>summary::-webkit-details-marker{display:none}
  .filter-details>summary::after{content:"▾";font-size:14px;transition:transform .15s}
  .filter-details[open]>summary::after{transform:rotate(180deg)}
  .filter-details>form{padding:0 14px 14px}
  .category-main .page-title{font-size:21px;margin:4px 0 6px}
  .toolbar{gap:8px}

  /* Thanh đáy: biểu tượng + chữ nhỏ, nút Gọi nổi bật */
  .mobile-bar{padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -2px 10px rgba(0,0,0,.08)}
  .mobile-bar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:6px 2px 5px;
    font-size:11px;line-height:1.2;color:var(--color-text,#1d1d1f);position:relative;border-right:0}
  .mobile-bar a span{white-space:nowrap}
  .mobile-bar .mb-call{color:#fff;background:var(--color-primary,#0a66d8)}
  .mobile-bar .mb-zalo b{display:flex;align-items:center;justify-content:center;width:24px;height:22px;border-radius:6px;background:#0068ff;color:#fff;font-size:8.5px;font-weight:700}
  .mobile-bar .mb-cart i{position:absolute;top:3px;left:calc(50% + 6px);min-width:16px;height:16px;padding:0 4px;border-radius:8px;background:#e00;color:#fff;font-size:10px;font-style:normal;line-height:16px;text-align:center}
  body{padding-bottom:calc(54px + env(safe-area-inset-bottom))}
  .sticky-atc{bottom:54px}
  .floating-contact{bottom:calc(110px + env(safe-area-inset-bottom))}
  body:has(.pd-mobile-cta) .mobile-bar{display:none}

  /* Chân trang gọn hơn */
  .site-footer{font-size:14px}
  .footer-grid{gap:18px}
}