/* Layout: cửa hàng linh kiện kiểu "sàn" — header xanh logo, menu danh mục bên trái, lưới sản phẩm, giá đỏ */
:root {
  --navy: #0b2545;
  --blue-700: #1450c8;
  --blue-500: #2f8cff;
  --blue-100: #e6f0ff;
  --sale: #e0182d;
  --bg: #f1f4f9;
  --surface: #ffffff;
  --surface-2: #f6f8fc;
  --fg: #0f1b2d;
  --muted: #5a6a80;
  --line: #dde4ee;
  --ok: #128a4a;
  --warn: #b26a00;
  --shadow: 0 1px 2px rgba(11, 37, 69, .06), 0 6px 18px rgba(11, 37, 69, .06);
  --f-display: "Montserrat", "Be Vietnam Pro", system-ui, sans-serif;
  --f-body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --r: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --blue-700: #4f8fff; --blue-500: #5ea6ff; --blue-100: #15284a;
    --sale: #ff5468; --bg: #0a111d; --surface: #111b2c; --surface-2: #0e1726;
    --fg: #e5ecf6; --muted: #93a3ba; --line: #22324a; --ok: #3ccf7f; --warn: #f0b04a;
    --shadow: 0 1px 2px rgba(0,0,0,.4); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --blue-700: #4f8fff; --blue-500: #5ea6ff; --blue-100: #15284a;
  --sale: #ff5468; --bg: #0a111d; --surface: #111b2c; --surface-2: #0e1726;
  --fg: #e5ecf6; --muted: #93a3ba; --line: #22324a; --ok: #3ccf7f; --warn: #f0b04a;
  --shadow: 0 1px 2px rgba(0,0,0,.4); color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.55 var(--f-body); -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 60; background: var(--navy); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
input, select, textarea { font: inherit; color: var(--fg); }
:focus-visible { outline: 2px solid var(--blue-500); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { text-wrap: balance; line-height: 1.25; }
.wrap { max-width: 1240px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.price { color: var(--sale); font-weight: 700; font-variant-numeric: tabular-nums; }
.old { color: var(--muted); text-decoration: line-through; font-size: .86em; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- top bar + header ---------- */
.topbar { background: var(--navy); color: #c9d8ee; font-size: 12.5px; }
.topbar .wrap { display: flex; gap: 18px; align-items: center; justify-content: space-between; padding-block: 6px; flex-wrap: wrap; }
.topbar nav { display: flex; gap: 16px; flex-wrap: wrap; }
.topbar a:hover { color: #fff; }
.header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: linear-gradient(100deg, #0d2a52 0%, #1450c8 55%, #2f8cff 100%); color: #fff; box-shadow: 0 2px 10px rgba(11,37,69,.25); }
.header .wrap { display: flex; align-items: center; gap: 18px; padding-block: 10px; }
.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand img { width: 46px; height: 46px; border-radius: 50%; box-shadow: 0 0 0 2px rgba(255,255,255,.7); }
.brand-text { font-family: var(--f-display); line-height: 1; }
.brand-text b { display: block; font-size: 22px; font-weight: 800; letter-spacing: -.2px; }
.brand-text b span { font-size: 14px; font-weight: 800; display: block; margin-bottom: 1px; }
.brand-text small { font-size: 9.5px; font-weight: 700; letter-spacing: 2.4px; opacity: .85; }
.search { flex: 1; position: relative; min-width: 0; }
.search form { display: flex; background: #fff; border-radius: 8px; overflow: hidden; }
.search input { flex: 1; min-width: 0; border: 0; padding: 11px 14px; outline: none; color: #0f1b2d; background: #fff; }
.search button { background: var(--sale); color: #fff; padding: 0 16px; display: grid; place-items: center; }
.suggest { position: absolute; left: 0; right: 0; top: calc(100% + 4px); background: var(--surface); color: var(--fg); border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,.2); overflow: hidden; z-index: 70; }
.suggest a { display: flex; gap: 10px; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.suggest a:hover, .suggest a.active { background: var(--blue-100); }
.suggest .thumb { width: 44px; height: 44px; flex: none; }
.suggest .nm { font-size: 13px; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.hactions { display: flex; gap: 6px; align-items: center; flex: none; }
.hbtn { display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 8px; color: #fff; line-height: 1.2; }
.hbtn:hover { background: rgba(255,255,255,.14); }
.hbtn small { display: block; font-size: 11px; opacity: .85; }
.hbtn b { font-size: 13px; }
.hbtn svg { width: 26px; height: 26px; flex: none; }
.cart-count { position: absolute; top: -6px; right: -8px; background: var(--sale); color: #fff; font-size: 11px; font-weight: 700; min-width: 18px; height: 18px; border-radius: 9px; display: grid; place-items: center; padding: 0 4px; }
.ico-wrap { position: relative; display: inline-flex; }
.menu-toggle { display: none; color: #fff; padding: 6px; }
.mainnav { background: var(--surface); border-bottom: 1px solid var(--line); }
.mainnav .wrap { display: flex; align-items: stretch; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.mainnav .wrap::-webkit-scrollbar { display: none; }
.mainnav a { padding: 11px 12px; font-weight: 600; font-size: 13.5px; white-space: nowrap; display: flex; align-items: center; gap: 6px; border-bottom: 2px solid transparent; }
.mainnav a:hover, .mainnav a.on { color: var(--blue-700); border-bottom-color: var(--blue-700); }
.mainnav a.allcat { background: var(--blue-700); color: #fff; border-radius: 0; border-bottom-color: transparent; }
:root[data-theme="dark"] .mainnav a.allcat { color: #fff; }
.mainnav a.hl { color: var(--sale); }

/* ---------- drawer (mobile category menu) ---------- */
.drawer-bg { position: fixed; inset: 0; background: rgba(5,12,24,.55); z-index: 90; }
.drawer { position: fixed; top: 0; bottom: 0; left: 0; width: min(320px, 86vw); background: var(--surface); z-index: 91; overflow-y: auto; padding-top: env(safe-area-inset-top, 0px); padding-left: env(safe-area-inset-left, 0px); }
.drawer h3 { margin: 0; padding: 14px 16px; background: var(--blue-700); color: #fff; font-family: var(--f-display); font-size: 15px; display: flex; justify-content: space-between; align-items: center; }
.drawer a { display: flex; gap: 10px; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); font-weight: 500; }

/* ---------- layout blocks ---------- */
main { padding-block: 16px 40px; min-height: 60vh; }
.panel { background: var(--surface); border-radius: var(--r); box-shadow: var(--shadow); }
.sec { margin-top: 18px; }
.sec-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.sec-head h2 { margin: 0; font-family: var(--f-display); font-size: 17px; font-weight: 800; text-transform: uppercase; letter-spacing: .2px; display: flex; align-items: center; gap: 8px; }
.sec-head h2::before { content: ""; width: 4px; height: 18px; background: var(--blue-700); border-radius: 2px; }
.sec-head .more { color: var(--blue-700); font-weight: 600; font-size: 13px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: 12.5px; background: var(--surface); }
.chip:hover, .chip.on { border-color: var(--blue-700); color: var(--blue-700); background: var(--blue-100); }

/* hero */
.hero { display: grid; grid-template-columns: 240px minmax(0, 1fr) 260px; gap: 12px; }
.catmenu { padding: 6px 0; align-self: start; }
.catmenu a { display: flex; align-items: center; gap: 10px; padding: 8px 14px; font-weight: 500; font-size: 13.5px; }
.catmenu a:hover { background: var(--blue-100); color: var(--blue-700); }
.catmenu a .ci { width: 22px; height: 22px; color: var(--blue-700); flex: none; }
.catmenu a .arr { margin-left: auto; color: var(--muted); }
.slider { position: relative; overflow: hidden; border-radius: var(--r); min-height: 0; background: var(--navy); }
.slides { display: flex; transition: transform .5s ease; height: 100%; }
.slide { flex: 0 0 100%; position: relative; aspect-ratio: 1400 / 620; max-width: 100%; }
.slide img { width: 100%; height: 100%; object-fit: cover; }
.slide.promo { display: flex; align-items: center; padding: 6% 7%; color: #fff; overflow: hidden; }
.slide.promo .txt { position: relative; z-index: 2; max-width: 58%; }
.slide.promo .eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; opacity: .85; }
.slide.promo h2 { font-family: var(--f-display); font-weight: 800; font-size: clamp(20px, 3.2vw, 38px); margin: 6px 0 10px; }
.slide.promo p { margin: 0 0 14px; opacity: .9; font-size: clamp(12px, 1.3vw, 15px); }
.slide.promo .art { position: absolute; right: 2%; top: 50%; transform: translateY(-50%); width: 44%; z-index: 1; }
.btn-pill { display: inline-flex; align-items: center; gap: 6px; background: #fff; color: var(--navy); font-weight: 700; padding: 9px 18px; border-radius: 999px; font-size: 13px; }
.dots { position: absolute; bottom: 10px; left: 0; right: 0; display: flex; justify-content: center; gap: 6px; z-index: 3; }
.dots button { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.5); }
.dots button.on { background: #fff; width: 22px; border-radius: 5px; }
.snav { position: absolute; top: 50%; transform: translateY(-50%); z-index: 3; width: 34px; height: 34px; border-radius: 50%; background: rgba(0,0,0,.35); color: #fff; display: grid; place-items: center; }
.snav.prev { left: 10px; } .snav.next { right: 10px; }
.side-banners { display: grid; gap: 12px; align-content: start; }
.sbanner { border-radius: var(--r); padding: 16px; color: #fff; min-height: 120px; display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden; }
.sbanner b { font-family: var(--f-display); font-size: 17px; font-weight: 800; position: relative; z-index: 1; }
.sbanner span { font-size: 12.5px; opacity: .9; position: relative; z-index: 1; }
.sbanner .art { position: absolute; right: -8px; bottom: -10px; width: 110px; opacity: .95; }
.sb1 { background: linear-gradient(135deg, #0d2a52, #1450c8); }
.sb2 { background: linear-gradient(135deg, #8a0f1f, #e0182d); }

/* policy strip */
.policies { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin-top: 12px; }
.policies div { display: flex; gap: 10px; align-items: center; padding: 12px 16px; }
.policies div + div { border-left: 1px solid var(--line); }
.policies svg { width: 30px; height: 30px; color: var(--blue-700); flex: none; }
.policies b { display: block; font-size: 13.5px; }
.policies small { color: var(--muted); font-size: 12px; }

/* category tiles */
.cat-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 8px; padding: 12px; }
.cat-tile { display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; padding: 12px 6px; border-radius: 8px; font-size: 12.5px; font-weight: 600; }
.cat-tile:hover { background: var(--blue-100); color: var(--blue-700); }
.cat-tile .ti { width: 54px; height: 54px; border-radius: 50%; background: var(--blue-100); display: grid; place-items: center; color: var(--blue-700); }
.cat-tile .ti svg { width: 30px; height: 30px; }

/* flash sale */
.flash { background: linear-gradient(100deg, #b3061a, #e0182d 45%, #ff5a3c); border-radius: var(--r); padding: 12px; }
.flash-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #fff; padding: 2px 4px 12px; flex-wrap: wrap; }
.flash-head h2 { margin: 0; font-family: var(--f-display); font-weight: 800; font-size: 22px; font-style: italic; letter-spacing: .5px; display: flex; gap: 8px; align-items: center; }
.countdown { display: flex; gap: 4px; align-items: center; font-weight: 700; font-variant-numeric: tabular-nums; }
.countdown span { background: #fff; color: #b3061a; border-radius: 4px; padding: 2px 6px; min-width: 30px; text-align: center; }
.flash .grid { gap: 8px; }

/* product grid & card */
.grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; padding: 12px; }
.grid.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 10px; display: flex; flex-direction: column; gap: 6px; position: relative; transition: box-shadow .2s, border-color .2s; min-width: 0; }
.card:hover { border-color: var(--blue-500); box-shadow: 0 6px 22px rgba(20,80,200,.14); }
.card .img { aspect-ratio: 1; border-radius: 8px; overflow: hidden; max-width: 100%; }
.card .img svg { width: 100%; height: 100%; display: block; transition: transform .3s; }
.card:hover .img svg { transform: scale(1.04); }
.card .nm { font-size: 13px; font-weight: 500; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.8em; }
.card .nm:hover { color: var(--blue-700); }
.card .pr { display: flex; gap: 6px; align-items: baseline; flex-wrap: wrap; }
.card .pr .price { font-size: 15.5px; }
.badge { position: absolute; top: 10px; left: 10px; background: var(--sale); color: #fff; font-size: 11.5px; font-weight: 700; padding: 2px 7px; border-radius: 4px; z-index: 1; }
.badge.hot { left: auto; right: 10px; background: #ff8a00; }
.card .meta { display: flex; align-items: center; justify-content: space-between; gap: 6px; font-size: 12px; color: var(--ok); margin-top: auto; }
.card .add { width: 32px; height: 32px; border-radius: 8px; background: var(--blue-100); color: var(--blue-700); display: grid; place-items: center; flex: none; }
.card .add:hover { background: var(--blue-700); color: #fff; }
.card .gift { font-size: 11.5px; color: var(--muted); background: var(--surface-2); border-radius: 6px; padding: 4px 6px; line-height: 1.35; }

/* build PC banner */
.build-cta { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: center; gap: 20px; padding: 22px 26px; border-radius: var(--r); background: linear-gradient(110deg, #0b2545 0%, #133a75 50%, #1450c8 100%); color: #fff; overflow: hidden; }
.build-cta h2 { font-family: var(--f-display); font-weight: 800; font-size: clamp(20px, 2.6vw, 30px); margin: 0 0 8px; }
.build-cta p { margin: 0 0 14px; opacity: .88; max-width: 52ch; }
.build-cta ol { margin: 0 0 16px; padding-left: 20px; opacity: .92; display: grid; gap: 2px; }
.build-cta .art { max-width: 320px; justify-self: end; width: 100%; }

/* brands */
.brands { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; padding: 12px; }
.brands a { border: 1px solid var(--line); border-radius: 8px; padding: 12px 6px; text-align: center; font-family: var(--f-display); font-weight: 800; color: var(--muted); letter-spacing: .3px; }
.brands a:hover { color: var(--blue-700); border-color: var(--blue-700); }

/* news */
.news-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; padding: 12px; }
.news-card { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.news-card .cover { aspect-ratio: 16/9; border-radius: 8px; overflow: hidden; max-width: 100%; }
.news-card .cover svg { width: 100%; height: 100%; display: block; }
.news-card h3 { margin: 0; font-size: 14.5px; line-height: 1.4; }
.news-card h3:hover { color: var(--blue-700); }
.news-card p { margin: 0; color: var(--muted); font-size: 13px; }
.tag { font-size: 11.5px; font-weight: 700; color: var(--blue-700); text-transform: uppercase; letter-spacing: .6px; }

/* breadcrumbs */
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.crumbs a:hover { color: var(--blue-700); }
.crumbs span.sep { opacity: .6; }

/* category page */
.catpage { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 12px; align-items: start; }
.filters { padding: 4px 0 10px; }
.filters h4 { margin: 0; padding: 12px 14px 6px; font-size: 13.5px; text-transform: uppercase; letter-spacing: .4px; }
.filters label { display: flex; gap: 8px; align-items: center; padding: 5px 14px; cursor: pointer; font-size: 13.5px; }
.filters label:hover { color: var(--blue-700); }
.filters input { accent-color: var(--blue-700); }
.filters .reset { margin: 10px 14px 0; color: var(--blue-700); font-weight: 600; font-size: 13px; }
.cat-intro { padding: 14px 16px; display: flex; gap: 14px; align-items: center; border-bottom: 1px solid var(--line); }
.cat-intro h1 { margin: 0; font-family: var(--f-display); font-size: 20px; font-weight: 800; }
.cat-intro p { margin: 2px 0 0; color: var(--muted); }
.sortbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; padding: 10px 16px; border-bottom: 1px solid var(--line); font-size: 13px; }
.sortbar .chip { cursor: pointer; }
.sortbar .count { margin-left: auto; color: var(--muted); }
.filter-toggle { display: none; }
.empty { padding: 40px 16px; text-align: center; color: var(--muted); display: grid; gap: 10px; justify-items: center; }

/* product page */
.pdp { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 12px; align-items: start; }
.pdp-main { display: grid; grid-template-columns: minmax(0, 440px) minmax(0, 1fr); gap: 22px; padding: 18px; }
.gallery .big { aspect-ratio: 1; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; max-width: 100%; position: relative; cursor: zoom-in; }
.gallery .big svg { width: 100%; height: 100%; display: block; }
.gallery .thumbs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 8px; }
.gallery .thumbs button { aspect-ratio: 1; border: 2px solid var(--line); border-radius: 8px; overflow: hidden; padding: 0; max-width: 100%; }
.gallery .thumbs button.on { border-color: var(--blue-700); }
.gallery .thumbs svg { width: 100%; height: 100%; display: block; }
.pinfo h1 { font-size: 21px; margin: 0 0 8px; font-weight: 700; line-height: 1.35; }
.pmeta { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.pmeta b { color: var(--fg); font-weight: 600; }
.pmeta .instock { color: var(--ok); font-weight: 600; }
.pricebox { background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; }
.pricebox .price { font-size: 28px; }
.pricebox .save { background: var(--sale); color: #fff; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 4px; }
.pricebox small { width: 100%; color: var(--muted); font-size: 12.5px; }
.hl-list { margin: 14px 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.hl-list li { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; }
.hl-list li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-700); margin-top: 8px; flex: none; }
.promo-box { border: 1px solid #f3b4bb; border-radius: 10px; overflow: hidden; margin: 14px 0; }
:root[data-theme="dark"] .promo-box { border-color: #5a2430; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .promo-box { border-color: #5a2430; } }
.promo-box h4 { margin: 0; background: var(--sale); color: #fff; padding: 8px 12px; font-size: 14px; display: flex; gap: 8px; align-items: center; }
.promo-box ol { margin: 0; padding: 10px 12px 10px 32px; display: grid; gap: 6px; font-size: 13.5px; }
.qty { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.qty button { width: 36px; height: 40px; font-size: 18px; background: var(--surface-2); }
.qty input { width: 48px; text-align: center; border: 0; background: var(--surface); -moz-appearance: textfield; }
.qty input::-webkit-outer-spin-button, .qty input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.buy-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px; margin-top: 12px; }
.btn { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; border-radius: 8px; padding: 10px 14px; font-weight: 700; text-align: center; line-height: 1.25; }
.btn small { font-weight: 400; font-size: 11.5px; opacity: .9; }
.btn-buy { background: linear-gradient(180deg, #f0283c, #c8102a); color: #fff; grid-column: 1 / -1; font-size: 16px; padding: 12px; }
.btn-blue { background: var(--blue-700); color: #fff; }
.btn-line { border: 1.5px solid var(--blue-700); color: var(--blue-700); background: var(--surface); }
.btn:hover { filter: brightness(1.06); }
.btn-row-inline { display: flex; gap: 8px; flex-wrap: wrap; }
.side-box { padding: 14px; display: grid; gap: 12px; }
.side-box h4 { margin: 0; font-size: 14px; text-transform: uppercase; letter-spacing: .3px; }
.side-box .row { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; }
.side-box .row svg { width: 26px; height: 26px; color: var(--blue-700); flex: none; }
.side-box .row b { display: block; font-size: 13.5px; }
.hotline-box { background: var(--blue-100); border-radius: 8px; padding: 12px; text-align: center; }
.hotline-box b { display: block; font-size: 20px; color: var(--sale); font-variant-numeric: tabular-nums; }
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs button { padding: 12px 18px; font-weight: 700; font-size: 14px; border-bottom: 3px solid transparent; white-space: nowrap; color: var(--muted); }
.tabs button.on { color: var(--blue-700); border-bottom-color: var(--blue-700); }
.tabpane { padding: 16px 18px; }
.desc h3 { font-size: 17px; margin: 18px 0 6px; }
.desc h3:first-child { margin-top: 0; }
.desc p { margin: 0 0 10px; max-width: 75ch; }
.spec-wrap { overflow-x: auto; }
table.spec { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.spec th, table.spec td { text-align: left; padding: 9px 12px; border: 1px solid var(--line); vertical-align: top; }
table.spec th { width: 36%; background: var(--surface-2); font-weight: 600; }
table.spec tr:nth-child(even) td { background: var(--surface-2); }
.compat-note { margin-top: 12px; font-size: 13px; color: var(--muted); }
.review-sum { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 20px; align-items: center; }
.review-sum .big { text-align: center; }
.review-sum .big b { font-size: 40px; font-family: var(--f-display); }
.stars { color: #f5a524; letter-spacing: 1px; }
.bars { display: grid; gap: 4px; font-size: 12.5px; }
.bars div { display: grid; grid-template-columns: 40px minmax(0, 1fr) 30px; gap: 8px; align-items: center; }
.bars i { height: 7px; border-radius: 4px; background: var(--line); position: relative; overflow: hidden; }
.bars i em { position: absolute; inset: 0 auto 0 0; background: #f5a524; }
.form { display: grid; gap: 10px; }
.form .two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }
.form label { display: grid; gap: 4px; font-size: 13px; font-weight: 600; }
.form input, .form textarea, .form select { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: var(--surface); width: 100%; }
.form textarea { min-height: 80px; resize: vertical; }
.star-pick { display: flex; gap: 2px; }
.star-pick button { font-size: 24px; color: var(--line); line-height: 1; padding: 0 2px; }
.star-pick button.on { color: #f5a524; }
.review { border-top: 1px solid var(--line); padding: 12px 0; }
.review b { margin-right: 8px; }
.qa { display: grid; gap: 8px; }
.qa details { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; }
.qa summary { font-weight: 600; cursor: pointer; }
.qa p { margin: 8px 0 0; color: var(--muted); }

/* PC parts list on PC product */
.parts { display: grid; gap: 8px; }
.part { display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; gap: 12px; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 8px; }
.part .thumb { width: 56px; height: 56px; }
.part .k { font-size: 11.5px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); font-weight: 700; }
.part a:hover { color: var(--blue-700); }

/* build pc */
.bp { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 12px; align-items: start; }
.bp-head { padding: 16px 18px; border-bottom: 1px solid var(--line); display: flex; gap: 14px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.bp-head h1 { margin: 0; font-family: var(--f-display); font-weight: 800; font-size: 21px; }
.bp-head p { margin: 2px 0 0; color: var(--muted); }
.slot { display: grid; grid-template-columns: 170px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 12px 18px; border-bottom: 1px solid var(--line); }
.slot .sl { font-weight: 700; display: flex; gap: 10px; align-items: center; }
.slot .sl .n { width: 26px; height: 26px; border-radius: 50%; background: var(--blue-100); color: var(--blue-700); display: grid; place-items: center; font-size: 12px; font-weight: 800; flex: none; }
.slot .chosen { display: grid; grid-template-columns: 60px minmax(0, 1fr); gap: 10px; align-items: center; }
.slot .chosen .thumb { width: 60px; height: 60px; }
.slot .chosen .nm { font-size: 13.5px; font-weight: 500; line-height: 1.35; }
.slot .chosen .nm:hover { color: var(--blue-700); }
.slot .ops { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.slot .ops .qty button { width: 28px; height: 32px; font-size: 15px; }
.slot .ops .qty input { width: 34px; }
.iconbtn { width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; border: 1px solid var(--line); background: var(--surface); }
.iconbtn:hover { border-color: var(--sale); color: var(--sale); }
.btn-choose { background: var(--blue-700); color: #fff; padding: 8px 14px; border-radius: 8px; font-weight: 700; font-size: 13px; display: inline-flex; gap: 6px; align-items: center; }
.warnings { display: grid; gap: 6px; padding: 12px 18px; }
.warn { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); border: 1px solid var(--line); }
.warn.bad { color: var(--sale); border-color: currentColor; }
.warn.good { color: var(--ok); border-color: currentColor; }
.summary { padding: 16px; display: grid; gap: 12px; position: sticky; top: calc(env(safe-area-inset-top, 0px) + 82px); }
.summary .row { display: flex; justify-content: space-between; gap: 10px; font-size: 13.5px; }
.summary .total { font-size: 24px; }
.meter { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--ok); }
.meter i.bad { background: var(--sale); }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(5,12,24,.6); z-index: 100; display: grid; place-items: center; padding: 16px; }
.modal { background: var(--surface); border-radius: 12px; width: min(860px, 100%); max-height: calc(100vh - 40px); display: flex; flex-direction: column; overflow: hidden; }
.modal-head { display: flex; gap: 10px; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.modal-head h3 { margin: 0; font-size: 16px; flex: 1; min-width: 160px; }
.modal-head input { border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; flex: 1; min-width: 160px; background: var(--surface); }
.modal-tools { display: flex; gap: 8px; padding: 8px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; align-items: center; font-size: 13px; }
.modal-list { overflow-y: auto; padding: 8px 16px 16px; }
.pick { display: grid; grid-template-columns: 70px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.pick .thumb { width: 70px; height: 70px; }
.pick .nm { font-weight: 500; font-size: 13.5px; }
.pick .sub { font-size: 12px; color: var(--muted); }
.pick.incompat { opacity: .5; }
.zoom-modal { width: min(640px, 100%); }
.zoom-modal svg { width: 100%; height: auto; display: block; }

/* cart & checkout */
.cart { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 12px; align-items: start; }
.cart-item { display: grid; grid-template-columns: 80px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.cart-item .thumb { width: 80px; height: 80px; }
.cart-item .nm { font-weight: 500; }
.cart-item .r { display: grid; gap: 6px; justify-items: end; }
.order-done { padding: 26px; display: grid; gap: 14px; max-width: 720px; margin: 0 auto; }
.order-done pre { white-space: pre-wrap; background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 12px; font: 13px/1.5 ui-monospace, Menlo, Consolas, monospace; overflow-x: auto; }
.radio-card { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; cursor: pointer; font-weight: 500 !important; }
.radio-card:has(input:checked) { border-color: var(--blue-700); background: var(--blue-100); }

/* article */
.article { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 12px; align-items: start; }
.article .body { padding: 22px 26px; }
.article h1 { font-family: var(--f-display); font-weight: 800; font-size: 26px; margin: 6px 0 10px; }
.article .body p { max-width: 70ch; font-size: 15px; line-height: 1.7; }
.article .cover { aspect-ratio: 16/7; border-radius: 10px; overflow: hidden; margin: 14px 0; max-width: 100%; }
.article .cover svg { width: 100%; height: 100%; display: block; }
.side-list a { display: grid; grid-template-columns: 90px minmax(0, 1fr); gap: 10px; padding: 10px 14px; border-top: 1px solid var(--line); font-size: 13px; font-weight: 500; }
.side-list a:hover { color: var(--blue-700); }
.side-list .cv { aspect-ratio: 16/10; border-radius: 6px; overflow: hidden; }
.side-list .cv svg { width: 100%; height: 100%; display: block; }
.page-body { padding: 22px 26px; }
.page-body h1 { font-family: var(--f-display); font-weight: 800; font-size: 24px; margin: 0 0 14px; }
.page-body p { max-width: 72ch; font-size: 15px; line-height: 1.7; }
.page-body ul { padding-left: 20px; }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; margin: 14px 0; }
.contact-grid div { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.contact-grid b { display: block; font-size: 15px; margin-top: 2px; user-select: all; }
.copy { color: var(--blue-700); font-weight: 600; font-size: 12.5px; margin-top: 4px; }

/* footer */
footer { background: var(--navy); color: #b8c7dd; margin-top: 20px; }
footer .cols { display: grid; grid-template-columns: 1.3fr repeat(3, minmax(0, 1fr)); gap: 24px; padding-block: 28px; }
footer h4 { color: #fff; margin: 0 0 10px; font-size: 14px; text-transform: uppercase; letter-spacing: .5px; }
footer a { display: block; padding: 3px 0; font-size: 13.5px; }
footer a:hover { color: #fff; }
footer .fbrand { display: flex; gap: 10px; align-items: center; color: #fff; margin-bottom: 10px; }
footer .fbrand img { width: 44px; height: 44px; border-radius: 50%; }
footer p { margin: 0 0 6px; font-size: 13.5px; }
footer .copy-line { border-top: 1px solid rgba(255,255,255,.12); padding-block: 12px; font-size: 12.5px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

/* floating */
.floating { position: fixed; right: max(14px, calc(env(safe-area-inset-right, 0px) + 10px)); bottom: calc(env(safe-area-inset-bottom, 0px) + 16px); display: grid; gap: 8px; z-index: 40; }
.floating a, .floating button { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; color: #fff; box-shadow: 0 4px 14px rgba(0,0,0,.25); font-weight: 800; font-size: 11px; }
.fl-zalo { background: #0068ff; }
.fl-phone { background: var(--sale); animation: ring 2s infinite; }
.fl-tiktok { background: #111; }
.fl-top { background: var(--blue-700); }
@keyframes ring { 0%, 100% { box-shadow: 0 0 0 0 rgba(224,24,45,.5); } 50% { box-shadow: 0 0 0 10px rgba(224,24,45,0); } }
.toast { position: fixed; left: 50%; bottom: calc(env(safe-area-inset-bottom, 0px) + 24px); transform: translateX(-50%); background: #0f1b2d; color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 200; box-shadow: 0 6px 20px rgba(0,0,0,.3); font-size: 13.5px; display: flex; gap: 10px; align-items: center; max-width: calc(100vw - 32px); }
.toast a { color: #8cc4ff; font-weight: 700; }

.catmenu .ci svg, .cat-tile .ti svg, .cat-intro .ti svg { width: 100%; height: 100%; display: block; }
.drawer a > span { display: inline-flex; flex: none; }
.drawer a > span svg { width: 22px; height: 22px; }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero .catmenu, .side-banners { display: none; }
  .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .pdp { grid-template-columns: minmax(0, 1fr); }
  .bp, .cart, .article { grid-template-columns: minmax(0, 1fr); }
  .summary { position: static; }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .menu-toggle { display: grid; }
  .hbtn .lbl { display: none; }
  .header .wrap { flex-wrap: wrap; gap: 10px; }
  .search { order: 3; flex-basis: 100%; }
  .brand { margin-right: auto; }
  .brand img { width: 38px; height: 38px; }
  .brand-text b { font-size: 18px; }
  .grid, .grid.g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding: 8px; }
  .policies { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .policies div:nth-child(3) { border-left: 0; }
  .policies div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .catpage { grid-template-columns: minmax(0, 1fr); }
  .catpage .filters { display: none; }
  .catpage .filters.open { display: block; }
  .filter-toggle { display: inline-flex; }
  .pdp-main { grid-template-columns: minmax(0, 1fr); padding: 12px; }
  .slot { grid-template-columns: minmax(0, 1fr); gap: 8px; padding: 12px; }
  .slot .ops { justify-content: flex-start; }
  .build-cta { grid-template-columns: minmax(0, 1fr); padding: 18px; }
  .build-cta .art { display: none; }
  .slide.promo .txt { max-width: 70%; }
  footer .cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-sum { grid-template-columns: minmax(0, 1fr); }
  .form .two { grid-template-columns: minmax(0, 1fr); }
  .article .body, .page-body { padding: 16px; }
  .cart-item { grid-template-columns: 64px minmax(0, 1fr); }
  .cart-item .thumb { width: 64px; height: 64px; }
  .cart-item .r { grid-column: 2; justify-items: start; grid-auto-flow: column; align-items: center; }
  .topbar nav { display: none; }
}
@media (max-width: 520px) {
  .news-grid { grid-template-columns: minmax(0, 1fr); }
  .hactions .hb-build { display: none; }
  .pricebox .price { font-size: 24px; }
  .pick { grid-template-columns: 54px minmax(0, 1fr); }
  .pick .thumb { width: 54px; height: 54px; }
  .pick > :last-child { grid-column: 2; }
  .part { grid-template-columns: 48px minmax(0, 1fr); }
  .part > :last-child { grid-column: 2; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
.pdp-col { display: grid; gap: 12px; grid-template-columns: minmax(0, 1fr); min-width: 0; align-content: start; }
@media (max-width: 860px) {
  .slide { aspect-ratio: 16 / 9; }
  .slide img { object-fit: contain; background: #1d5fae; }
  .slide.promo { padding: 5% 6%; }
  .slide.promo .eyebrow, .slide.promo p { display: none; }
  .slide.promo .txt { max-width: 60%; }
  .slide.promo .art { width: 40%; }
}

/* =========================================================
   Bản tinh chỉnh (frontend-design + ui-ux-pro-max)
   Màu: xanh logo #1450c8 / navy #0b2545 / nền lạnh #edf2f9 / đỏ giá #e0182d
   Chữ: Montserrat (khớp logo) cho tiêu đề, Be Vietnam Pro cho nội dung
   Điểm nhấn duy nhất: nắp CPU khắc laser ở banner đầu trang
   ========================================================= */
:root { --bg: #edf2f9; --r: 12px; --shadow: none; }
:root[data-theme="dark"] { --bg: #0a111d; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: #0a111d; } }
body { font-size: 15px; }
.panel { box-shadow: none; border: 1px solid var(--line); }

/* tiêu đề khu: chữ thường, bỏ vạch màu */
.sec-head { padding: 14px 18px; }
.sec-head h2 { text-transform: none; font-size: 19px; letter-spacing: -.2px; }
.sec-head h2::before { display: none; }
.filters h4, .side-box h4, footer h4 { text-transform: none; letter-spacing: 0; font-size: 15px; }
.tag, .part .k, .slide.promo .eyebrow { text-transform: none; letter-spacing: 0; }
.slide.promo .eyebrow { font-size: 13px; font-weight: 600; opacity: .8; }
.flash-head h2 { font-style: normal; font-size: 21px; letter-spacing: -.2px; }

/* thẻ sản phẩm: bỏ zoom khi rê chuột, thêm thông số chính, nút to dễ bấm */
.card { padding: 12px; gap: 8px; }
.card:hover { box-shadow: none; }
.card:hover .img svg { transform: none; }
.card .img { border-radius: 8px; }
.card .nm { font-size: 14px; }
.kspec { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px; }
.kspec li { font-size: 12px; line-height: 1.3; padding: 3px 7px; border-radius: 5px; background: var(--surface-2); border: 1px solid var(--line); color: var(--muted); font-variant-numeric: tabular-nums; }
.card .add { width: 40px; height: 40px; border-radius: 10px; }
.card .pr .price { font-size: 16.5px; }

/* banner đầu: nắp CPU khắc laser */
.slide.promo .art.etched { width: 40%; filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .45)); transform: translateY(-50%) rotate(-6deg); }
.slide.promo .art.etched svg { display: block; width: 100%; height: auto; }
.etched .sheen { animation: sheen 3.2s ease-in-out 0.4s 1 both; }
@keyframes sheen { from { transform: translate(-60%, -60%); } to { transform: translate(60%, 60%); } }
.hero-price { font-family: var(--f-display); font-weight: 800; font-size: clamp(18px, 2.4vw, 28px); margin: 0 0 14px; font-variant-numeric: tabular-nums; }
.hero-price .old { color: #b8c7dd; font-size: .55em; font-weight: 600; margin-left: 6px; }
.slide.promo h2 { letter-spacing: -.5px; line-height: 1.08; }

/* nút & vùng bấm: tối thiểu 44px */
.btn, .btn-choose, .iconbtn { min-height: 44px; }
.iconbtn { min-width: 44px; }
.qty button { min-width: 40px; }
.chip { padding: 6px 12px; }

@media (max-width: 860px) {
  .slide.promo .art.etched { width: 42%; right: 3%; }
  .hero-price { margin-bottom: 8px; }
  .kspec li:nth-child(3) { display: none; }
}
@media (min-width: 861px) { .grid.fit { grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr)); } .grid.fit .card .img { max-height: 300px; aspect-ratio: auto; height: 300px; } }
@media (max-width: 860px) {
  .snav { display: none; }
  .slide.promo { padding: 6% 5%; }
  .slide.promo .txt { max-width: 56%; }
}

/* ===== Ảnh thật sản phẩm (nền trắng của hãng) ===== */
.pimg { width: 100%; height: 100%; object-fit: contain; display: block; background: #fff; }
.card .img.photo, .gallery .big.photo, .thumb:has(.pimg), .gallery .thumbs button:has(.pimg) { background: #fff; }
.card .img.photo .pimg { padding: 6px; }
.gallery .big .pimg { padding: 14px; }
.thumb .pimg { border-radius: 6px; border: 1px solid var(--line); }
.zoom-body { background: #fff; display: grid; place-items: center; max-height: calc(100vh - 140px); overflow: auto; }
.zoom-body .pimg { max-height: calc(100vh - 140px); width: auto; max-width: 100%; height: auto; }
.zoom-body svg { width: 100%; height: auto; }
.img-note { margin: 8px 0 0; font-size: 12.5px; color: var(--muted); }
.sbanner .art .pimg { border-radius: 10px; }
.slide.promo .art .pimg { border-radius: 16px; aspect-ratio: 1; }
.build-cta .art .pimg { border-radius: 14px; aspect-ratio: 1; }
.kspec li.cond { color: var(--warn); border-color: currentColor; background: transparent; }
.card .meta { color: var(--muted); }
a.add { text-decoration: none; }

/* Góc Lian Li: nền xanh đậm thay cho dải đỏ flash sale */
.flash.lianli { background: linear-gradient(100deg, #061a36, #0d3a8a 55%, #1450c8); }
.flash.lianli .flash-head { align-items: baseline; }
.ll-sub { color: #b8c7dd; font-size: 13.5px; flex: 1; min-width: 200px; }
#preset { max-width: 100%; min-width: 0; width: 100%; }
.bp-head .btn-row-inline { flex: 1 1 260px; min-width: 0; max-width: 420px; }

/* =========================================================
   Trang chủ kiểu showroom (banner + khuyến mãi + dịch vụ + dòng PC tự chạy)
   ========================================================= */
.home-hero { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 12px; }
.home-hero .slider { aspect-ratio: auto; }
.home-hero .slide { aspect-ratio: 1400 / 560; }
.th-blue { background: linear-gradient(110deg, #061a36, #0d3a8a 55%, #2f8cff); }
.th-purple { background: linear-gradient(110deg, #1b0b3a, #4c1fa8 55%, #9b5cff); }
.th-red { background: linear-gradient(110deg, #3a0610, #a10f22 55%, #ff4b5c); }
.th-dark { background: linear-gradient(110deg, #05070c, #1a2433 60%, #3a4a63); }
.th-teal { background: linear-gradient(110deg, #032b33, #0b6e74 55%, #1fc7b8); }
.slide.promo .art.photo-art { width: 38%; right: 4%; background: #fff; border-radius: 18px; padding: 10px; aspect-ratio: 1; box-shadow: 0 18px 40px rgba(0,0,0,.35); }
.slide.promo .art.photo-art .pimg { border-radius: 10px; }
.side-banners { display: grid; gap: 12px; grid-template-rows: 1fr 1fr; }
.sbn, .pbn { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 42%; align-items: center; gap: 8px; border-radius: var(--r); padding: 14px; color: #fff; overflow: hidden; min-height: 130px; }
.sbn .bn-txt, .pbn .bn-txt { display: grid; gap: 4px; min-width: 0; }
.sbn b, .pbn b { font-family: var(--f-display); font-weight: 800; font-size: 16.5px; line-height: 1.2; }
.sbn span span, .pbn span span { font-size: 12.5px; opacity: .88; }
.sbn em, .pbn em { font-style: normal; font-weight: 800; color: #ffd34d; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.bn-img { background: #fff; border-radius: 12px; aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; padding: 4px; }
.bn-img img, .bn-img svg { width: 100%; height: 100%; object-fit: contain; }
.sbn:hover, .pbn:hover { filter: brightness(1.08); }

.svc { margin-top: 12px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); }
.marquee { overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.marquee::-webkit-scrollbar { display: none; }
.marquee .track { display: flex; gap: 14px; width: max-content; padding: 12px; }
.svc .track { gap: 0; padding: 0; }
.svc-item { display: flex; gap: 10px; align-items: center; padding: 12px 22px; border-right: 1px solid var(--line); min-width: 250px; }
.svc-item:hover { background: var(--blue-100); }
.svc-ic { width: 40px; height: 40px; border-radius: 50%; background: var(--blue-100); color: var(--blue-700); display: grid; place-items: center; flex: none; }
.svc-ic svg { width: 22px; height: 22px; }
.svc-item b { display: block; font-size: 14px; }
.svc-item small { color: var(--muted); font-size: 12.5px; }

.promo-strip { margin-top: 18px; }
.pst-head, .pc-row-head { display: flex; align-items: baseline; gap: 10px 14px; flex-wrap: wrap; margin-bottom: 10px; }
.pst-head h2, .pc-row-head h2 { margin: 0; font-family: var(--f-display); font-weight: 800; font-size: 21px; letter-spacing: -.2px; }
.pst-head .more { margin-left: auto; color: var(--blue-700); font-weight: 600; font-size: 13.5px; }
.stepper { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 28px) / 3); gap: 14px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
.stepper::-webkit-scrollbar { display: none; }
.pbn { scroll-snap-align: start; min-height: 150px; }

.pc-row { margin-top: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 0 4px; }
.pc-row-head { padding: 0 16px; margin-bottom: 0; }
.pc-row-head h2 { color: var(--blue-700); }
.pc-row-head .sub { color: var(--muted); font-size: 13.5px; }
.row-act { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.row-act .more { color: var(--blue-700); font-weight: 600; font-size: 13.5px; margin-right: 4px; }
.rownav { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); font-size: 20px; line-height: 1; display: grid; place-items: center; }
.rownav:hover { border-color: var(--blue-700); color: var(--blue-700); }
.pc-card { width: 250px; flex: none; position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 10px; display: flex; flex-direction: column; gap: 8px; }
.pc-card:hover { border-color: var(--blue-500); }
.pc-card .img { aspect-ratio: 1; border-radius: 8px; overflow: hidden; background: #fff; display: block; }
.pc-card .img .pimg { padding: 8px; }
.pc-card .nm { font-weight: 600; font-size: 14px; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.7em; }
.pc-card .nm:hover { color: var(--blue-700); }
.pc-spec { list-style: none; margin: 0; padding: 8px; display: grid; gap: 3px; background: var(--surface-2); border-radius: 8px; font-size: 12.5px; }
.pc-spec li { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pc-spec li b { color: var(--blue-700); font-weight: 700; }
.pc-foot { display: grid; gap: 8px; margin-top: auto; }
.pc-foot .price { font-size: 18px; }
.pc-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.btn-mini { min-height: 38px; border-radius: 8px; font-weight: 700; font-size: 13px; border: 1.5px solid var(--blue-700); color: var(--blue-700); background: var(--surface); }
.btn-mini.buy { background: var(--sale); border-color: var(--sale); color: #fff; }
.btn-pill.ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.7); }

/* Menu danh mục: bấm mới hiện */
.mega-bg { z-index: 90; }
.mega { position: fixed; z-index: 91; top: calc(env(safe-area-inset-top, 0px) + 150px); left: 50%; transform: translateX(-50%); width: min(1208px, calc(100vw - 32px)); max-height: calc(100vh - 170px); overflow-y: auto; background: var(--surface); border-radius: 14px; box-shadow: 0 24px 60px rgba(5,12,24,.35); display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.mega-head { display: none; }
.mega-pc { background: var(--blue-100); padding: 14px 10px; display: grid; align-content: start; gap: 2px; border-radius: 14px 0 0 14px; }
.mega-pc a { display: flex; gap: 8px; align-items: center; padding: 9px 10px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.mega-pc a:hover { background: var(--surface); color: var(--blue-700); }
.mega-pc a svg { width: 18px; height: 18px; color: var(--blue-700); }
.mega-grid { padding: 16px 18px; display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 16px 18px; }
.mega-col { display: grid; align-content: start; gap: 2px; }
.mega-col a { font-size: 13.5px; color: var(--muted); padding: 3px 0; }
.mega-col a:hover { color: var(--blue-700); }
.mega-col .mc-title { color: var(--fg); font-weight: 700; font-size: 14.5px; display: flex; gap: 8px; align-items: center; margin-bottom: 4px; }
.mega-col .mc-title span { width: 22px; height: 22px; color: var(--blue-700); display: inline-flex; }
.mega-col .mc-title svg { width: 22px; height: 22px; }

@media (max-width: 1100px) {
  .home-hero { grid-template-columns: minmax(0, 1fr); }
  .home-hero .side-banners { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .stepper { grid-auto-columns: calc((100% - 14px) / 2); }
}
@media (max-width: 860px) {
  .home-hero .slide { aspect-ratio: 16 / 9; }
  .slide.promo .art.photo-art { width: 40%; padding: 6px; border-radius: 12px; }
  .home-hero .side-banners { grid-template-columns: minmax(0, 1fr); }
  .stepper { grid-auto-columns: 82%; }
  .pc-card { width: 210px; }
  .pc-row-head .sub { display: none; }
  .row-act .rownav { display: none; }
  .svc-item { min-width: 220px; padding: 10px 14px; }
  .mega { top: 0; bottom: 0; left: 0; transform: none; width: min(340px, 88vw); max-height: none; border-radius: 0; grid-template-columns: minmax(0, 1fr); align-content: start; padding-top: env(safe-area-inset-top, 0px); }
  .mega-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: var(--blue-700); color: #fff; font-family: var(--f-display); }
  .mega-head button { color: #fff; font-size: 24px; }
  .mega-pc { border-radius: 0; }
  .mega-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (max-width: 860px) {
  .home-hero .side-banners { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .sbn { grid-template-columns: minmax(0, 1fr); min-height: 0; padding: 12px; }
  .sbn .bn-img { display: none; }
  .sbn b { font-size: 14.5px; }
  .sbn span span { font-size: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
}

/* Quà tặng kèm bộ PC */
.gift-box h4 { background: linear-gradient(90deg, var(--sale), #ff6a3d); }
.gift-box ol.gifts { list-style: none; padding: 10px 12px; }
.gift-box ol.gifts li { display: flex; align-items: center; gap: 10px; }
.gift-box ol.gifts .thumb { width: 44px; height: 44px; flex: none; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); }
.gift-box ol.gifts li > span { display: flex; flex-direction: column; line-height: 1.35; }
.gift-box ol.gifts .muted { font-size: 12.5px; color: var(--muted); }
.gift-note { margin: 0; padding: 0 12px 10px; font-size: 12.5px; color: var(--muted); }
.pc-gift { font-size: 12px; font-weight: 600; color: var(--sale); background: color-mix(in srgb, var(--sale) 9%, transparent); border-radius: 6px; padding: 4px 7px; line-height: 1.35; display: flex; gap: 5px; align-items: flex-start; margin-top: auto; }
.pc-gift svg { flex: none; margin-top: 1px; }
.cart-gift { display: block; font-size: 12px; color: var(--sale); margin-top: 3px; line-height: 1.35; }
.cart-gift svg { vertical-align: -2px; }
.summary .gift-box { margin: 4px 0; }
.pc-gift + .pc-foot { margin-top: 0; }

/* SIÊU SALE RAM — dải đầu trang chủ */
.sale-row { margin: 0 0 18px; border-radius: 14px; padding: 12px 0 2px; background: linear-gradient(120deg, #c4001d 0%, #ff2d3f 45%, #ff7a1a 100%); color: #fff; box-shadow: 0 10px 28px rgba(224, 24, 45, .25); position: relative; overflow: hidden; }
.sale-row::before { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(135deg, rgba(255,255,255,.06) 0 14px, transparent 14px 28px); pointer-events: none; }
.sale-head { position: relative; display: flex; align-items: center; gap: 6px 14px; flex-wrap: wrap; padding: 0 16px; }
.sale-head h2 { margin: 0; font-family: var(--f-display); font-weight: 800; font-style: italic; font-size: 24px; letter-spacing: .3px; text-shadow: 0 2px 0 rgba(0,0,0,.18); }
.sale-head .fire { display: inline-block; animation: fire 1.2s ease-in-out infinite alternate; font-style: normal; }
@keyframes fire { from { transform: scale(1) rotate(-6deg); } to { transform: scale(1.18) rotate(6deg); } }
@media (prefers-reduced-motion: reduce) { .sale-head .fire { animation: none; } }
.sale-head .sub { font-size: 13.5px; font-weight: 600; display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center; }
.sale-head .sub b { background: #fff; color: var(--sale); border-radius: 999px; padding: 2px 10px; font-size: 12.5px; }
.sale-row .row-act .more { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.sale-row .rownav { background: rgba(255,255,255,.95); border-color: transparent; color: var(--sale); }
.sale-row .track { padding: 12px 16px 14px; }
.sale-row .sale-card { width: 196px; flex: none; color: var(--fg); }
.sale-card { border-color: #ffc2c8; }
.sale-card .badge { font-size: 12.5px; padding: 3px 8px; background: linear-gradient(90deg, #e0182d, #ff6a1a); }
.sale-card .nm { font-size: 13px; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 35px; }
.sale-card .pr { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 8px; }
.sale-card .pr .old { font-size: 12.5px; }
.sale-cond { font-size: 11.5px; font-weight: 600; color: var(--sale); display: flex; gap: 4px; align-items: center; }
.sale-card .btn-mini { margin-top: auto; width: 100%; }
.pricebox.sale-box { border-color: #ffb3bb; background: linear-gradient(180deg, color-mix(in srgb, var(--sale) 8%, var(--surface)), var(--surface)); }
.sale-tag { display: inline-block; background: linear-gradient(90deg, #e0182d, #ff6a1a); color: #fff; font-weight: 800; font-style: italic; font-size: 12.5px; padding: 3px 10px; border-radius: 999px; }
.mainnav a.hl.hot { font-weight: 700; }
@media (max-width: 640px) {
  .sale-row { border-radius: 12px; margin: 0 0 12px; }
  .sale-head h2 { font-size: 20px; }
  .sale-row .sale-card { width: 160px; }
}

/* Build PC dạng bảng báo giá */
.bq-wrap { padding: 4px 18px 0; }
.bq { width: 100%; border-collapse: collapse; font-size: 13.5px; table-layout: fixed; }
.bq thead th { background: var(--blue-100); color: var(--blue-700); font-weight: 700; font-size: 12.5px; text-align: left; padding: 10px 8px; white-space: nowrap; }
.bq thead th:first-child { border-radius: 8px 0 0 8px; } .bq thead th:last-child { border-radius: 0 8px 8px 0; }
.bq td { padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.bq tbody tr:nth-child(even) td { background: var(--surface-2); }
.bq .c-n { width: 34px; text-align: center; color: var(--muted); font-weight: 700; }
.bq .c-q { width: 100px; text-align: center; }
.bq .c-u { width: 126px; text-align: right; }
.bq .c-t { width: 118px; text-align: right; white-space: nowrap; }
.bq .c-a { width: 100px; text-align: right; white-space: nowrap; }
.bq .c-a .iconbtn { display: inline-grid; margin-left: 4px; min-width: 40px; min-height: 40px; width: 40px; height: 40px; }
.bq-k { display: block; font-size: 11.5px; font-weight: 700; color: var(--blue-700); text-transform: uppercase; letter-spacing: .3px; margin-bottom: 5px; }
.bq tr.bq-empty .bq-k { color: var(--muted); }
.bq tr.bq-empty td { padding-top: 12px; padding-bottom: 12px; }
.bq .chosen { display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 10px; align-items: center; }
.bq .chosen .thumb { width: 52px; height: 52px; }
.bq .chosen .nm { font-weight: 600; line-height: 1.35; display: block; }
.bq .chosen .nm:hover { color: var(--blue-700); }
.bq-sub { font-size: 12px; margin-top: 2px; }
.sale-hint { color: var(--sale); font-weight: 600; }
.bq .c-u s { display: block; color: var(--muted); font-size: 12px; }
.bq .c-u .price { display: block; }
.sale-pill { display: inline-block; margin-top: 3px; background: linear-gradient(90deg, #e0182d, #ff6a1a); color: #fff; font-size: 10.5px; font-weight: 800; padding: 1px 7px; border-radius: 999px; white-space: nowrap; }
.bq .qty { display: inline-flex; }
.bq .qty button { width: 28px; height: 32px; font-size: 15px; }
.bq .qty input { width: 32px; }
.bq tfoot td { border-bottom: 0; padding: 8px; font-size: 14px; text-align: right; }
.bq tfoot tr:first-child td { padding-top: 14px; }
.bq tfoot tr.off td { color: var(--ok); font-weight: 600; }
.bq tfoot tr.grand td { font-weight: 800; font-size: 16px; }
.bq tfoot tr.grand .price { font-size: 24px; }
.bq tfoot tr.gift-row td { text-align: left; padding: 12px 14px; background: color-mix(in srgb, var(--sale) 6%, var(--surface)); border: 1.5px dashed color-mix(in srgb, var(--sale) 55%, transparent); border-radius: 10px; }
.bq tfoot tr.gift-row b { color: var(--sale); display: flex; gap: 6px; align-items: center; }
.bq tfoot tr.gift-row ul { margin: 6px 0 4px; padding-left: 20px; display: grid; gap: 3px; }
.bq-acts { display: flex; gap: 10px; flex-wrap: wrap; padding: 14px 18px 4px; }
.bq-acts .btn-buy { flex: 1 1 280px; }
.bq-acts .btn-line { flex: 0 1 220px; }
.img-modal { width: min(760px, 100%); }
.img-wrap { overflow-y: auto; padding: 12px 16px; background: var(--surface-2); }
.img-wrap img { display: block; width: 100%; height: auto; border-radius: 8px; box-shadow: var(--shadow); -webkit-touch-callout: default; }
.img-acts { padding: 12px 16px 16px; display: grid; gap: 8px; }
.img-acts p { margin: 0; font-size: 12.5px; }
@media (max-width: 1100px) and (min-width: 761px) {
  .bq .c-q { width: 92px; } .bq .c-u { width: 104px; } .bq .c-t { width: 106px; } .bq .c-a { width: 92px; }
  .bq .c-a .iconbtn { width: 36px; min-width: 36px; }
}
@media (max-width: 760px) {
  .bq-wrap { padding: 0 10px; }
  .bq thead { display: none; }
  .bq, .bq tbody, .bq tfoot { display: block; }
  .bq tbody tr { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; gap: 8px 10px; padding: 12px 2px; border-bottom: 1px solid var(--line); align-items: center; }
  .bq tbody tr:nth-child(even) td { background: none; }
  .bq td { padding: 0; border: 0; width: auto !important; }
  .bq .c-n { grid-column: 1; grid-row: 1; align-self: start; }
  .bq .c-p { grid-column: 2; grid-row: 1; }
  .bq tr.bq-empty .c-p { grid-column: 2 / -1; }
  .bq .c-a { grid-column: 3; grid-row: 1; align-self: start; }
  .bq .c-q { grid-column: 2; grid-row: 2; text-align: left; }
  .bq .c-t { grid-column: 3; grid-row: 2; }
  .bq .c-u { display: none; }
  .bq .c-u.sale { display: block; grid-column: 2 / -1; grid-row: 3; text-align: left; }
  .bq .c-u.sale s, .bq .c-u.sale .price { display: inline; margin-right: 8px; }
  .bq tfoot tr { display: flex; justify-content: space-between; gap: 10px; }
  .bq tfoot td { display: block; }
  .bq tfoot tr.gift-row td { width: 100%; margin-top: 8px; }
}