/* =========================================================
   THẾ GIỚI GIẤY — Sản phẩm (listing + detail)
   New components only — reuse style.css for everything else
   ========================================================= */

/* ---------- Page title band ---------- */
.sp-hero{
  background:linear-gradient(180deg,#eaf4ff 0%,#f6faff 100%);
  padding:44px 0 40px;
}
.sp-hero h1{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.01em;margin-bottom:12px;}
.sp-hero p{color:var(--ink-500);font-size:16px;max-width:760px;}

/* ---------- Layout shell ---------- */
.sp-layout{display:grid;grid-template-columns:280px 1fr;gap:32px;align-items:start;padding:44px 0 76px;}
.sp-layout.sp-layout-detail{grid-template-columns:1fr 360px;}
.sp-layout > .sp-main,.sp-layout > .sp-sidebar{min-width:0;}

@media (max-width:1080px){
  .sp-layout,.sp-layout.sp-layout-detail{grid-template-columns:1fr;}
  .sp-sidebar{order:2;}
  .sp-main{order:1;}
}

/* ---------- Sidebar blocks ---------- */
.sp-sidebar{display:flex;flex-direction:column;gap:20px;}
.sp-sidebar-block{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px;box-shadow:var(--shadow-sm);
}
.sp-sidebar-block h3{font-size:15.5px;font-weight:800;color:var(--navy-900);margin-bottom:16px;}

.sp-cat-tree{display:flex;flex-direction:column;gap:4px;}
.sp-cat-all{
  display:block;padding:10px 10px;margin-bottom:6px;border-radius:8px;
  font-size:14.5px;font-weight:700;color:var(--ink-500);transition:.15s;
}
.sp-cat-all:hover{background:var(--surface-alt);color:var(--blue-600);}
.sp-cat-all.is-active{background:var(--blue-50);color:var(--navy-900);}
.sp-cat-group{border-bottom:1px solid var(--line);}
.sp-cat-group:last-child{border-bottom:none;}
.sp-cat-parent{
  width:100%;display:flex;align-items:center;gap:12px;padding:10px 4px;
  font-size:14.5px;font-weight:700;color:var(--navy-900);transition:.15s;text-align:left;
}
.sp-cat-parent:hover{color:var(--blue-600);}
.sp-cat-parent.is-active{color:var(--blue-600);}
.sp-cat-parent.is-active .sp-cat-ico{background:var(--blue-600);color:#fff;}
.sp-cat-parent .sp-cat-ico{
  flex:none;width:34px;height:34px;border-radius:9px;background:var(--blue-100);color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;transition:.15s;
}
.sp-cat-parent .sp-cat-ico svg{width:18px;height:18px;}
.sp-cat-name{flex:1;}
.sp-cat-chevron{flex:none;color:var(--ink-300);transition:transform .25s;}
.sp-cat-parent[aria-expanded="true"] .sp-cat-chevron{transform:rotate(180deg);color:var(--blue-600);}
.sp-cat-children{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.sp-cat-children a{
  display:block;padding:8px 10px 8px 46px;border-radius:8px;
  font-size:13.5px;font-weight:500;color:var(--ink-500);transition:.15s;
}
.sp-cat-children a:hover{background:var(--surface-alt);color:var(--blue-600);}
.sp-cat-children a.is-active{background:var(--blue-50);color:var(--navy-900);font-weight:700;}
.sp-cat-group:last-child .sp-cat-children{padding-bottom:6px;}

.sp-chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.sp-chip{
  display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:999px;
  border:1.5px solid var(--line);background:#fff;font-size:13.5px;font-weight:700;color:var(--ink-700);
  cursor:pointer;transition:.15s;
}
.sp-chip input{accent-color:var(--blue-600);}
.sp-chip:hover{border-color:var(--blue-600);color:var(--blue-600);}
.sp-chip.is-active{border-color:var(--blue-600);background:var(--blue-50);color:var(--navy-900);}

.sp-mini-list{display:flex;flex-direction:column;gap:14px;}
.sp-mini-card{display:flex;align-items:center;gap:12px;}
.sp-mini-thumb{
  flex:none;width:54px;height:54px;border-radius:10px;background:linear-gradient(160deg,var(--blue-50),var(--blue-100));
  color:var(--blue-600);display:flex;align-items:center;justify-content:center;
}
.sp-mini-thumb svg{width:28px;height:28px;}
.sp-mini-body{flex:1;min-width:0;}
.sp-mini-body h4{font-size:13.5px;font-weight:700;color:var(--navy-900);line-height:1.35;margin-bottom:4px;}
.sp-mini-body a.sp-mini-link{font-size:12.5px;font-weight:700;color:var(--blue-600);display:inline-flex;align-items:center;gap:3px;}
.sp-mini-stars{display:flex;align-items:center;gap:5px;margin-top:3px;}
.sp-mini-stars svg{width:12px;height:12px;}
.sp-mini-stars span{font-size:11.5px;color:var(--ink-500);font-weight:600;}

.sp-logo-row{display:flex;flex-wrap:wrap;gap:10px;}
.sp-logo-row .logo-chip{padding:10px 16px;font-size:13px;}

.sp-article-list{display:flex;flex-direction:column;gap:14px;}
.sp-article-card{display:flex;gap:12px;}
.sp-article-thumb{
  flex:none;width:54px;height:54px;border-radius:10px;background:linear-gradient(160deg,var(--blue-100),var(--blue-50));
  color:var(--blue-600);display:flex;align-items:center;justify-content:center;
}
.sp-article-thumb svg{width:26px;height:26px;}
.sp-article-body h4{font-size:13.5px;font-weight:700;color:var(--navy-900);line-height:1.4;margin-bottom:3px;}
.sp-article-body p{font-size:12px;color:var(--ink-500);line-height:1.4;}

.sp-search-box{position:relative;}
.sp-search-box input{
  width:100%;padding:12px 44px 12px 16px;border:1.5px solid var(--line);border-radius:999px;
  font-size:14px;font-family:var(--font-body);background:var(--surface-alt);
}
.sp-search-box input:focus{outline:none;border-color:var(--blue-600);background:#fff;}
.sp-search-box svg{position:absolute;right:16px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--ink-500);}

/* ---------- Toolbar (listing) ---------- */
.sp-toolbar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-bottom:28px;padding-bottom:22px;border-bottom:1px solid var(--line);
}
.sp-toolbar h2{font-size:20px;font-weight:800;color:var(--navy-900);}
.sp-toolbar-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.sp-select{
  padding:10px 36px 10px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:13.5px;
  font-family:var(--font-body);font-weight:600;color:var(--ink-700);background:#fff
    url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none"><path d="m6 9 6 6 6-6" stroke="%235b6b82" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>') no-repeat right 10px center;
  background-size:16px;appearance:none;cursor:pointer;
}
.sp-select:focus{outline:none;border-color:var(--blue-600);}
.sp-search-inline{position:relative;}
.sp-search-inline input{
  padding:10px 38px 10px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:13.5px;
  font-family:var(--font-body);width:220px;background:#fff;
}
.sp-search-inline input:focus{outline:none;border-color:var(--blue-600);}
.sp-search-inline svg{position:absolute;right:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--ink-500);}

/* ---------- 3-col product grid (listing) ---------- */
.sp-grid-9{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px;}
@media (max-width:900px){.sp-grid-9{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.sp-grid-9{grid-template-columns:1fr;}}

.sp-empty-state{
  text-align:center;padding:64px 24px;background:var(--surface-alt);border-radius:var(--radius-lg);
  margin-bottom:40px;
}
.sp-empty-ico{
  width:60px;height:60px;border-radius:50%;background:#fff;color:var(--ink-300);margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);
}
.sp-empty-ico svg{width:28px;height:28px;}
.sp-empty-state h3{font-size:17px;font-weight:800;color:var(--navy-900);margin-bottom:8px;}
.sp-empty-state p{font-size:14px;color:var(--ink-500);margin-bottom:22px;}

/* ---------- Pagination ---------- */
.sp-pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:56px;}
.sp-pagination button,.sp-pagination span{
  min-width:40px;height:40px;padding:0 6px;border-radius:10px;border:1.5px solid var(--line);
  background:#fff;font-family:var(--font-head);font-weight:700;font-size:14px;color:var(--ink-700);
  display:flex;align-items:center;justify-content:center;transition:.15s;
}
.sp-pagination button:hover{border-color:var(--blue-600);color:var(--blue-600);}
.sp-pagination button.is-active{background:var(--navy-800);border-color:var(--navy-800);color:#fff;}
.sp-pagination button svg{width:16px;height:16px;}

/* ---------- SEO content block ---------- */
.sp-seo-block{
  background:var(--surface-alt);border-radius:var(--radius-md);padding:28px 30px;
}
.sp-seo-block h2{font-size:17px;font-weight:800;margin-bottom:12px;}
.sp-seo-block p{color:var(--ink-500);font-size:14.5px;line-height:1.75;}

/* =========================================================
   PRODUCT DETAIL PAGE
   ========================================================= */
.sp-detail-top{display:grid;grid-template-columns:440px 1fr;gap:36px;margin-bottom:44px;}
.sp-detail-top > div{min-width:0;}
@media (max-width:900px){.sp-detail-top{grid-template-columns:1fr;}}

.sp-gallery-main{
  height:420px;border-radius:var(--radius-lg);background:linear-gradient(160deg,var(--blue-50),var(--blue-100));
  color:var(--blue-600);display:flex;align-items:center;justify-content:center;margin-bottom:14px;
  box-shadow:var(--shadow-sm);
}
.sp-gallery-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;}
.sp-gallery-thumb{
  height:78px;border-radius:10px;background:linear-gradient(160deg,var(--blue-50),var(--blue-100));
  color:var(--blue-600);display:flex;align-items:center;justify-content:center;border:1.5px solid transparent;
  cursor:pointer;transition:.15s;
}
.sp-gallery-thumb:hover,.sp-gallery-thumb.is-active{border-color:var(--blue-600);}
.sp-gallery-thumb svg{width:26px;height:26px;}

.sp-detail-info h1{font-size:clamp(22px,2.6vw,30px);font-weight:800;margin-bottom:14px;letter-spacing:-.01em;}
.sp-meta-row{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13.5px;color:var(--ink-500);margin-bottom:16px;}
.sp-meta-row strong{color:var(--ink-700);font-weight:700;}
.sp-share-row{display:flex;align-items:center;gap:10px;margin-bottom:22px;}
.sp-share-row span{font-size:13px;color:var(--ink-500);font-weight:600;margin-right:4px;}
.sp-detail-info .lead-copy{color:var(--ink-700);font-size:15px;line-height:1.75;margin-bottom:26px;}
.sp-cta-row{display:flex;flex-wrap:nowrap;gap:12px;}
.sp-cta-row .btn{flex:1;min-width:0;padding:14px 16px;}

/* ---------- Spec table ---------- */
.spec-table{width:100%;table-layout:fixed;border-collapse:collapse;margin-bottom:48px;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;}
.spec-table td{word-wrap:break-word;overflow-wrap:break-word;}
.spec-table tr:nth-child(odd){background:var(--surface-alt);}
.spec-table td{padding:14px 20px;font-size:14.5px;border-bottom:1px solid var(--line);}
.spec-table tr:last-child td{border-bottom:none;}
.spec-table td:first-child{width:38%;font-weight:700;color:var(--navy-900);}
.spec-table td:last-child{color:var(--ink-700);}
.sp-detail-info .spec-table{margin:18px 0 22px;}
.sp-detail-info .spec-table td{padding:11px 16px;font-size:13.5px;}

/* ---------- Related products row ---------- */
.sp-related-row{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:56px;}
@media (max-width:900px){.sp-related-row{grid-template-columns:repeat(3,1fr);}}
@media (max-width:640px){.sp-related-row{grid-template-columns:repeat(2,1fr);}}
.sp-related-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;transition:.2s;
}
.sp-related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.sp-related-thumb{
  height:110px;background:linear-gradient(160deg,var(--blue-50),var(--blue-100));color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;
}
.sp-related-thumb svg{width:40px;height:40px;}
.sp-related-body{padding:14px;}
.sp-related-body h4{font-size:13px;font-weight:700;color:var(--navy-900);line-height:1.4;margin-bottom:8px;min-height:36px;}
.sp-related-body a{font-size:12.5px;font-weight:700;color:var(--blue-600);display:inline-flex;align-items:center;gap:4px;}

/* ---------- Product description section ---------- */
.sp-desc-block{margin-bottom:56px;}
.sp-desc-block h2{font-size:24px;font-weight:800;margin-bottom:16px;}
.sp-desc-block p{color:var(--ink-700);font-size:15px;line-height:1.8;}

/* ---------- Star rating ---------- */
.star-rating{display:inline-flex;align-items:center;gap:3px;}
.star-rating svg{width:18px;height:18px;color:var(--orange-500);}
.star-rating.sm svg{width:13px;height:13px;}
.rating-summary{display:flex;align-items:center;gap:12px;margin-bottom:28px;}
.rating-summary strong{font-family:var(--font-head);font-size:22px;font-weight:800;color:var(--navy-900);}
.rating-summary span{font-size:14px;color:var(--ink-500);}

/* ---------- Review cards ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:56px;}
@media (max-width:900px){.review-grid{grid-template-columns:1fr;}}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-sm);
}
.review-card .star-rating{margin-bottom:10px;}
.review-card p{font-size:14px;color:var(--ink-700);line-height:1.65;margin-bottom:16px;}
.review-author{display:flex;align-items:center;gap:10px;}
.review-avatar{
  width:38px;height:38px;border-radius:50%;background:var(--blue-100);color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-head);font-weight:800;font-size:14px;flex:none;
}
.review-author strong{display:block;font-size:13.5px;color:var(--navy-900);font-weight:700;}
.review-author span{display:block;font-size:12px;color:var(--ink-500);}

/* ---------- Policy list (sidebar) ---------- */
.sp-policy-list{display:flex;flex-direction:column;gap:18px;}
.sp-policy-item{display:flex;gap:14px;align-items:flex-start;}
.sp-policy-ico{
  flex:none;width:40px;height:40px;border-radius:11px;background:var(--blue-100);color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;
}
.sp-policy-ico svg{width:20px;height:20px;}
.sp-policy-item h4{font-size:14px;font-weight:800;color:var(--navy-900);margin-bottom:5px;line-height:1.35;}
.sp-policy-item p{font-size:12.5px;color:var(--ink-500);line-height:1.6;}

/* ---------- Mini quote form block ---------- */
.sp-form-block{
  background:linear-gradient(135deg,var(--navy-800) 0%,var(--navy-900) 65%);border-radius:var(--radius-lg);
  padding:44px;margin-bottom:20px;
}
.sp-form-block-inner{display:grid;grid-template-columns:1fr .8fr;gap:40px;align-items:center;}
@media (max-width:900px){.sp-form-block-inner{grid-template-columns:1fr;}}
.sp-form-copy h2{color:#fff;font-size:clamp(20px,2.4vw,26px);margin-bottom:10px;}
.sp-form-copy p{color:rgba(255,255,255,.78);font-size:14.5px;line-height:1.7;}
.sp-mini-form{background:#fff;border-radius:var(--radius-md);padding:26px;box-shadow:0 20px 50px rgba(0,0,0,.25);}
.sp-mini-form h3{font-size:17px;font-weight:800;margin-bottom:16px;color:var(--navy-900);}

@media (max-width:640px){
  .sp-toolbar{flex-direction:column;align-items:flex-start;}
  .sp-search-inline input{width:100%;}
  .sp-detail-top{gap:24px;}
  .sp-gallery-main{height:300px;}
  .sp-form-block{padding:28px 20px;}
}

/* ---------- Product info tabs ---------- */
.sp-tabs{margin-bottom:12px;}
.sp-tab-list{
  display:flex;flex-wrap:wrap;gap:6px;border-bottom:1.5px solid var(--line);margin-bottom:28px;
}
.sp-tab-btn{
  padding:14px 18px;font-family:var(--font-head);font-weight:700;font-size:14.5px;color:var(--ink-500);
  border-bottom:2.5px solid transparent;margin-bottom:-1.5px;transition:.2s;white-space:nowrap;
}
.sp-tab-btn:hover{color:var(--navy-800);}
.sp-tab-btn.is-active{color:var(--blue-600);border-bottom-color:var(--blue-600);}
.sp-tab-panel{display:none;}
.sp-tab-panel.is-active{display:block;animation:partner-fade .3s ease;}

@media (max-width:640px){
  .sp-tab-list{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;}
  .sp-tab-btn{padding:12px 14px;font-size:13.5px;}
}