:root{
  --blue:#12345f;
  --blue2:#0e4d8f;
  --red:#e0393e;
  --text:#172033;
  --muted:#667085;
  --line:#e7ebf0;
  --bg:#ffffff;
  --soft:#f6f8fb;
  --shadow:0 14px 40px rgba(15,23,42,.08);
  --radius:18px;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,"Helvetica Neue",sans-serif;color:var(--text);background:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
.front-body{background:#fff}
.site-shell{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:100vh;background:#fff}
.front-sidebar{border-right:1px solid var(--line);padding:18px 16px;background:#fff;position:sticky;top:0;height:100vh;overflow:auto}
.logo-box{display:flex;align-items:center;justify-content:center;background:#07111f;border-radius:20px;padding:24px 18px;margin-bottom:18px;box-shadow:var(--shadow)}
.logo-box img{width:205px;height:auto}
.side-search{display:flex;gap:8px;background:var(--soft);border:1px solid var(--line);padding:8px;border-radius:14px;margin-bottom:14px}
.side-search input{min-width:0;flex:1;border:0;background:transparent;outline:none;padding:8px;color:var(--text)}
.side-search button,.mini-cart-form button,.btn,.auth-card button,.checkout-card button,.admin-form button{border:0;background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;border-radius:12px;padding:10px 14px;cursor:pointer;font-weight:700;box-shadow:0 8px 18px rgba(14,77,143,.18)}
.category-menu{display:flex;flex-direction:column;gap:5px;margin-top:10px}
.category-menu a{display:block;padding:11px 12px;border-radius:12px;color:#2f3b52;transition:.15s;background:#fff;border:1px solid transparent}
.category-menu a:hover,.category-menu a.on{background:#f0f6ff;border-color:#d8e8ff;color:var(--blue2)}
.category-menu em{font-style:normal;font-size:14px;line-height:1.25}
.sidebar-contact{margin-top:20px;border-radius:16px;background:#f7f9fc;border:1px solid var(--line);padding:12px;color:#344054;font-weight:700}
.sidebar-contact p{margin:8px 0}
.front-main{min-width:0;padding:22px 28px 50px;background:#fff}
.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:18px;padding:0 18px;margin-bottom:20px;background:#fff;box-shadow:0 8px 24px rgba(15,23,42,.04)}
.topbar strong{display:block;font-size:18px}.topbar span{font-size:12px;color:var(--muted)}
.top-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.top-actions a{font-weight:700;font-size:14px;padding:9px 12px;border-radius:999px;background:#f5f7fb;color:#1f2a44}.top-actions b{background:var(--red);color:#fff;border-radius:999px;padding:2px 7px;margin-left:4px}.primary-link{background:#e8f1ff!important;color:var(--blue2)!important}
.hero{position:relative;height:360px;border-radius:28px;overflow:hidden;background:#f2f6fb;box-shadow:var(--shadow);margin-bottom:18px;border:1px solid var(--line)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .5s;display:flex;align-items:center;padding:54px;background:linear-gradient(135deg,#fff 0%,#eef6ff 52%,#fff0f1 100%)}
.slide.active{opacity:1}.slide-content{max-width:620px}.kicker{display:inline-flex;background:#fff;border:1px solid #d9e8ff;color:var(--blue2);border-radius:999px;padding:8px 14px;font-weight:800;font-size:13px}.slide h1{font-size:44px;line-height:1.05;margin:18px 0 14px;color:#0b2447}.slide p{font-size:18px;color:#435069;margin:0 0 22px}.hero-btn{display:inline-flex;background:var(--red);color:#fff;padding:13px 18px;border-radius:14px;font-weight:900}.hero-art{margin-left:auto;width:230px;height:230px;border-radius:50%;background:rgba(255,255,255,.74);display:grid;place-items:center;font-size:78px;box-shadow:inset 0 0 0 18px rgba(14,77,143,.07)}
.contact-strip{border:1px solid #fed7aa;background:#fff7ed;color:#9a3412;border-radius:18px;padding:16px 18px;font-size:22px;font-weight:900;margin:18px 0 22px;text-align:center}.contact-strip span{display:block}.contact-zalo{margin-top:6px;font-size:18px}
.section-head{display:flex;align-items:end;justify-content:space-between;margin:28px 0 14px}.section-head h2{font-size:26px;margin:0}.section-head p{margin:6px 0 0;color:var(--muted)}
.product-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.product-card{border:1px solid var(--line);border-radius:22px;background:#fff;overflow:hidden;box-shadow:0 10px 24px rgba(15,23,42,.06);transition:.18s}.product-card:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(15,23,42,.1)}.product-image{display:block;aspect-ratio:1.1/1;background:#f8fafc;overflow:hidden}.product-image img{width:100%;height:100%;object-fit:cover}.product-info{padding:14px}.product-info p{margin:7px 0;font-size:14px;line-height:1.45}.price{color:var(--red);font-size:17px}.mini-cart-form{margin-top:10px}.mini-cart-form button{width:100%;padding:10px}
.page-title{display:flex;justify-content:space-between;gap:18px;align-items:end;margin:8px 0 20px}.page-title h1{margin:0;font-size:30px}.page-title p{margin:5px 0 0;color:var(--muted)}
.product-detail{display:grid;grid-template-columns:minmax(0,440px) minmax(0,1fr);gap:28px;border:1px solid var(--line);border-radius:26px;padding:22px;background:#fff;box-shadow:var(--shadow)}.detail-image{border-radius:22px;overflow:hidden;background:#f8fafc}.detail-body h1{margin-top:0;font-size:32px}.detail-meta{display:grid;gap:10px;margin:18px 0}.detail-meta p{margin:0;border:1px solid var(--line);background:#fbfcfe;padding:12px;border-radius:14px}.qty-row{display:flex;gap:10px}.qty-row input{width:90px;border:1px solid var(--line);border-radius:12px;padding:10px}.qty-row button{flex:1}
.auth-wrap{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#f7fbff,#fff)}.auth-card{width:min(460px,92vw);border:1px solid var(--line);border-radius:28px;background:#fff;padding:28px;box-shadow:var(--shadow)}.auth-logo{background:#07111f;border-radius:18px;padding:20px;margin-bottom:20px}.auth-logo img{width:210px;margin:auto}.auth-card h1{margin:0 0 8px}.auth-card p{color:var(--muted)}.form-field{display:grid;gap:7px;margin:14px 0}.form-field label{font-weight:700}.form-field input,.form-field textarea,.form-field select{border:1px solid var(--line);border-radius:14px;padding:12px;background:#fff;outline:none}.form-field input:focus,.form-field textarea:focus,.form-field select:focus{border-color:#93c5fd;box-shadow:0 0 0 4px #dbeafe}.alert{border-radius:14px;padding:12px 14px;margin:12px 0;font-weight:700}.alert.error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.alert.ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}.auth-links{display:flex;gap:12px;margin-top:14px;flex-wrap:wrap}.auth-links a{color:var(--blue2);font-weight:800}
.cart-table,.admin-table{width:100%;border-collapse:separate;border-spacing:0 10px}.cart-table th,.admin-table th{text-align:left;color:#667085;font-size:13px}.cart-table td,.admin-table td{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px;vertical-align:top}.cart-table td:first-child,.admin-table td:first-child{border-left:1px solid var(--line);border-radius:14px 0 0 14px}.cart-table td:last-child,.admin-table td:last-child{border-right:1px solid var(--line);border-radius:0 14px 14px 0}.cart-thumb{width:72px;height:62px;object-fit:cover;border-radius:10px}.cart-total{display:flex;justify-content:flex-end;gap:20px;align-items:center;margin:18px 0;font-size:22px;font-weight:900}.checkout-card{max-width:760px;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
.promo-panel{display:grid;grid-template-columns:1fr 300px;gap:20px}.promo-card{border:1px solid var(--line);border-radius:24px;padding:22px;background:#fff;box-shadow:var(--shadow)}.promo-link-box{display:flex;gap:10px;margin:14px 0}.promo-link-box input{flex:1;border:1px solid var(--line);border-radius:12px;padding:12px}.qr-box{display:grid;place-items:center;background:#f8fafc;border-radius:18px;padding:18px;border:1px dashed #cbd5e1}.qr-box img{width:220px;height:220px}
.admin-body{background:#f4f7fb}.admin-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh}.admin-sidebar{background:#08111f;color:#fff;padding:18px;position:sticky;top:0;height:100vh}.admin-logo{border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:18px;margin-bottom:18px;background:rgba(255,255,255,.04)}.admin-logo img{width:200px}.admin-sidebar nav{display:grid;gap:8px}.admin-sidebar a{display:block;padding:12px 14px;border-radius:12px;color:#d8e2f0;font-weight:700}.admin-sidebar a:hover{background:rgba(255,255,255,.09);color:#fff}.admin-main{padding:24px}.admin-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.admin-top h1{margin:0}.admin-top a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 14px;font-weight:800}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}.stat-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 8px 20px rgba(15,23,42,.04)}.stat-card span{color:#667085}.stat-card b{display:block;font-size:30px;margin-top:8px}.admin-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 8px 20px rgba(15,23,42,.04);margin-bottom:18px}.admin-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.admin-form .full{grid-column:1/-1}.admin-form input,.admin-form textarea,.admin-form select{border:1px solid var(--line);border-radius:12px;padding:10px}.badge{display:inline-flex;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:900}.badge.paid{background:#dcfce7;color:#166534}.badge.unpaid{background:#fee2e2;color:#991b1b}.badge.role{background:#e0f2fe;color:#075985}.small{font-size:12px;color:#667085}.inline-form{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.inline-form select,.inline-form input{border:1px solid var(--line);border-radius:10px;padding:8px}.danger{background:#991b1b!important}.success-page{max-width:760px;margin:40px auto;text-align:center}.success-icon{font-size:68px}.muted{color:var(--muted)}
@media(max-width:1080px){.product-grid{grid-template-columns:repeat(3,1fr)}.site-shell{grid-template-columns:240px minmax(0,1fr)}.front-sidebar{padding:14px}.hero-art{display:none}}
@media(max-width:760px){.site-shell,.admin-shell{display:block}.front-sidebar,.admin-sidebar{position:relative;height:auto;border-right:0;border-bottom:1px solid var(--line)}.logo-box{padding:16px}.logo-box img{width:190px}.category-menu{display:grid;grid-template-columns:repeat(2,1fr);max-height:250px;overflow:auto}.front-main,.admin-main{padding:14px}.topbar{height:auto;align-items:flex-start;gap:12px;flex-direction:column;padding:14px}.hero{height:300px;border-radius:20px}.slide{padding:28px}.slide h1{font-size:30px}.slide p{font-size:15px}.contact-strip{font-size:18px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.product-info{padding:10px}.product-info p{font-size:12px}.product-detail{grid-template-columns:1fr;padding:14px}.promo-panel{grid-template-columns:1fr}.cart-table,.cart-table tbody,.cart-table tr,.cart-table td,.cart-table th,.admin-table,.admin-table tbody,.admin-table tr,.admin-table td,.admin-table th{display:block}.cart-table thead,.admin-table thead{display:none}.cart-table td,.admin-table td{border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:6px}.stats-grid{grid-template-columns:repeat(2,1fr)}.admin-form{grid-template-columns:1fr}}

/* v2: big image banner, uploads, rich editor */
.hero.hero-banners{height:1030px;background:#fff;border-radius:30px;box-shadow:0 18px 46px rgba(15,23,42,.10);border:1px solid var(--line)}
.hero-banners .banner-slide{padding:0;background:#f8fafc;display:block;overflow:hidden}
.hero-banners .banner-slide img{width:100%;height:100%;object-fit:cover;display:block}
.hero-banners .slide:not(.active){pointer-events:none}
.check-row{display:flex!important;align-items:center;gap:8px;font-weight:800;color:#243041}.check-row input{width:auto!important}
.editor-wrap label{display:block;margin-bottom:8px;font-weight:800}.editor-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}.editor-toolbar button{padding:8px 12px;border-radius:10px;background:#eef4ff;color:#0f3b71}.rich-editor{min-height:220px;border:1px solid var(--line);border-radius:16px;padding:16px;background:#fff;line-height:1.7;outline:none}.rich-editor:focus{border-color:#93c5fd;box-shadow:0 0 0 4px #dbeafe}.rich-editor img,.rich-content img{max-width:100%;height:auto;border-radius:14px}.rich-editor h2,.rich-content h2{font-size:24px;margin:14px 0 8px}.rich-editor ul,.rich-content ul{padding-left:22px}.existing-gallery{border:1px dashed #cbd5e1;border-radius:16px;padding:12px;background:#f8fafc}.gallery-admin-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;margin-top:10px}.gallery-admin-grid label{background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;display:grid;gap:6px}.gallery-admin-grid img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:10px}.gallery-admin-grid span{font-size:12px;color:#475467}.banner-preview{width:min(720px,100%);height:210px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}.banner-thumb{width:180px;height:70px;object-fit:cover;border-radius:12px;border:1px solid var(--line)}.cancel-link{display:inline-flex;margin-left:10px;font-weight:900;color:var(--blue2)}.enhanced-detail{align-items:start}.gallery-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:12px}.gallery-strip button{border:1px solid var(--line);background:#fff;border-radius:12px;padding:5px;cursor:pointer}.gallery-strip img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:8px}.product-rich-content{margin-top:24px;border:1px solid var(--line);border-radius:26px;padding:22px;background:#fff;box-shadow:var(--shadow)}.product-rich-content h2{margin-top:0}.rich-content{line-height:1.8;color:#25314a}.rich-content p{margin:10px 0}.admin-form.product-edit-form{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-table td form + form{margin-top:6px}
@media(max-width:760px){.hero.hero-banners{height:240px;border-radius:20px}.gallery-admin-grid{grid-template-columns:repeat(2,1fr)}.gallery-strip{grid-template-columns:repeat(4,1fr)}.banner-thumb{width:100%;height:90px}.admin-form.product-edit-form{grid-template-columns:1fr}}

/* v3: search/filter + backend pro editor */
.side-search-advanced{display:grid;grid-template-columns:1fr auto;gap:8px}
.side-search-advanced select{grid-column:1/-1;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px;color:#344054;outline:none}
.front-filter{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(160px,.8fr) auto auto;gap:10px;align-items:center;border:1px solid var(--line);background:#fff;border-radius:18px;padding:12px;margin:0 0 22px;box-shadow:0 8px 22px rgba(15,23,42,.04)}
.front-filter input,.front-filter select{height:44px;border:1px solid var(--line);border-radius:12px;padding:0 12px;outline:none;background:#fff;color:#1f2937}
.front-filter input:focus,.front-filter select:focus,.admin-filter input:focus,.admin-filter select:focus{border-color:#93c5fd;box-shadow:0 0 0 4px #dbeafe}
.front-filter button,.admin-filter button{border:0;background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;border-radius:12px;padding:11px 16px;cursor:pointer;font-weight:900;white-space:nowrap}
.filter-reset,.admin-filter a{display:inline-flex;align-items:center;justify-content:center;height:42px;padding:0 12px;border-radius:12px;border:1px solid var(--line);background:#fff;color:#344054;font-weight:800;white-space:nowrap}
.admin-filter{display:grid;grid-template-columns:minmax(180px,1fr) repeat(3,minmax(140px,.5fr)) auto auto;gap:10px;align-items:center;margin:12px 0 16px;padding:12px;border:1px solid #e7ebf0;background:#f8fafc;border-radius:16px}
.admin-filter input,.admin-filter select{height:42px;border:1px solid var(--line);border-radius:12px;padding:0 12px;outline:none;background:#fff;min-width:0}
.editor-toolbar-pro{border:1px solid var(--line);border-bottom:0;background:#fbfcfe;border-radius:16px 16px 0 0;padding:10px;gap:6px;position:sticky;top:0;z-index:2}
.editor-toolbar-pro button{min-width:38px;height:36px;display:inline-flex;align-items:center;justify-content:center;padding:0 10px;border-radius:9px;background:#fff!important;color:#172033!important;border:1px solid #d9dee8!important;box-shadow:none!important;font-weight:800}
.editor-toolbar-pro button:hover{background:#eef4ff!important;border-color:#b7d5ff!important;color:var(--blue2)!important}
.rich-editor-pro{border-radius:0 0 16px 16px!important;min-height:420px;font-size:15px;background:#fff}
.rich-editor-pro:empty:before{content:'Chỉnh sửa chi tiết sản phẩm tại đây. Bạn có thể dán hình ảnh, văn bản, bảng và dùng thanh công cụ phía trên để định dạng.';color:#98a2b3}
.rich-editor-pro table,.rich-content table{border-collapse:collapse;width:100%;margin:12px 0}
.rich-editor-pro td,.rich-editor-pro th,.rich-content td,.rich-content th{border:1px solid #d0d5dd;padding:8px}
.admin-table input[type="number"]{height:36px}
@media(max-width:760px){.front-filter{grid-template-columns:1fr}.front-filter button,.filter-reset{width:100%}.admin-filter{grid-template-columns:1fr}.side-search-advanced{grid-template-columns:1fr}.side-search-advanced button{width:100%}.rich-editor-pro{min-height:260px}.editor-toolbar-pro{position:relative}}


/* v4: detail-only search, info-first products, bulk product actions */
.side-search-advanced{grid-template-columns:1fr auto}
.side-search-advanced .search-keyword{grid-column:1/-1;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px}
.side-search-advanced select,.side-search-advanced .price-range-fields,.side-search-advanced button{grid-column:1/-1}
.price-range-fields{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.price-range-fields input{width:100%;min-width:0;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px;outline:none}
.product-card-info-first{display:flex;flex-direction:column}
.product-card-info-first .product-info{order:1}
.product-card-info-first .product-image{order:2}
.product-card-info-first .mini-cart-form{order:3;margin:0;padding:12px 14px 14px}
.product-detail-info-first{display:block}
.product-detail-info-first .detail-body{margin-bottom:22px}
.product-detail-info-first .detail-media{max-width:880px;margin:0 auto}
.product-detail-info-first .detail-image img{width:100%;height:auto}
.bulk-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:12px 0;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:#f8fafc}
.bulk-actions button{border:0;color:#fff;border-radius:10px;padding:10px 14px;cursor:pointer;font-weight:800}
.table-check{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;font-weight:800}
.table-check input{width:18px;height:18px}
.select-cell{width:86px}
@media(max-width:760px){.price-range-fields{grid-template-columns:1fr}.bulk-actions{align-items:stretch;flex-direction:column}.bulk-actions button{width:100%}.select-cell{width:auto}}


/* v5: tìm kiếm toàn trang */
.auth-search{display:grid;grid-template-columns:1fr auto;gap:8px;margin:0 0 20px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.auth-search input{min-width:0;border:1px solid var(--line);border-radius:12px;padding:10px 12px;outline:none}
.auth-search button{padding:10px 13px}
@media(max-width:760px){.auth-search{grid-template-columns:1fr}.qty-row{flex-wrap:wrap}.qty-row input{width:100%}}

/* v6: giới thiệu chi tiết website */