/* =========================================================
   MÔ HÌNH NHẬT — design tokens
   Palette: ink/paper dominant, one crimson accent (rising-sun
   red) used sparingly for stamps, tags and focus states.
   Type: Oswald (condensed, stencil-like headings), Be Vietnam
   Pro (body, full Vietnamese diacritics), JetBrains Mono
   (specs — scale ratios, SKU, price, quantity).
   ========================================================= */
:root {
  --ink: #111111;
  --ink-soft: #2b2b2b;
  --paper: #faf9f6;
  --panel: #efeee9;
  --line: rgba(17, 17, 17, 0.14);
  --line-strong: rgba(17, 17, 17, 0.55);
  --muted: #6e6e6b;
  --accent: #b3122a;
  --accent-ink: #ffffff;

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Be Vietnam Pro", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;

  --wrap: 1280px;
  --gap: clamp(1rem, 2vw, 2rem);
  --radius: 2px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.02em; margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* Back-to-top floating button */
.back-to-top {
  position: fixed; right: clamp(1rem, 3vw, 2rem); bottom: calc(clamp(1rem, 3vw, 2rem) + 66px); z-index: 60;
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  background: var(--ink); color: var(--paper); border: 1px solid var(--ink);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.2s var(--ease), visibility 0.2s var(--ease), transform 0.2s var(--ease),
    background 0.2s var(--ease), color 0.2s var(--ease);
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover, .back-to-top:focus-visible { background: var(--paper); color: var(--ink); }
.back-to-top svg { width: 18px; height: 18px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2.5rem); }
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--accent); color: #fff; padding: 0.75rem 1.25rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* =========================================================
   Header
   ========================================================= */
.site-header { border-bottom: 1px solid var(--line); }

.topbar { background: var(--ink); color: #eceae4; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.5rem; flex-wrap: wrap; }
.topbar__tagline { margin: 0; opacity: 0.75; text-transform: uppercase; }
.topbar__contact { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.topbar__contact a { display: inline-flex; align-items: center; gap: 0.4em; transition: color 0.2s var(--ease); }
.topbar__contact a:hover, .topbar__contact a:focus-visible { color: #ffffff; }
.topbar__contact svg { width: 13px; height: 13px; flex: none; }

@media (max-width: 640px) {
  .topbar__tagline { display: none; }
}

.brandbar { padding-block: 1rem; }
.brandbar__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--gap); flex-wrap: wrap; }

.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo__mark {
  width: 46px; height: 46px; border-radius: 50%; border: 2px solid var(--ink);
  display: grid; place-items: center; position: relative; flex: none;
  background:
    radial-gradient(circle at 50% 42%, var(--accent) 0 16%, transparent 17%),
    repeating-conic-gradient(from -8deg, var(--accent) 0 10deg, transparent 10deg 30deg);
  background-color: var(--paper);
}
.logo__mark--img { border: none; border-radius: 0; background: none; padding: 0; object-fit: contain; }
.logo__wordmark { font-family: var(--font-display); line-height: 1; }
.logo__wordmark strong { display: block; font-size: 1.15rem; letter-spacing: 0.03em; text-transform: uppercase; }
.logo__wordmark span { display: block; font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.18em; color: var(--muted); text-transform: uppercase; margin-top: 2px; }

.header-search {
  position: relative; max-width: 360px; width: 100%; display: flex; align-items: center;
}
.header-search input {
  width: 100%; font: inherit; font-family: var(--font-body); font-size: 0.85rem;
  padding: 0.65rem 2.6rem 0.65rem 1rem; border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink);
}
.header-search input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.header-search__btn {
  position: absolute; right: 0; top: 0; bottom: 0; width: 2.6rem; display: flex; align-items: center; justify-content: center;
  border-left: 1px solid var(--line-strong); transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.header-search__btn svg { width: 16px; height: 16px; }
.header-search__btn:hover, .header-search__btn:focus-visible { background: var(--ink); color: var(--paper); }

/* =========================================================
   Navigation — supports 3 levels
   ========================================================= */
.mainnav { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 40; }
.mainnav__inner { display: flex; align-items: center; gap: 1rem; }

.navtoggle {
  display: none; align-items: center; gap: 0.6rem; padding: 0.9rem 0;
  font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.85rem;
}
.navtoggle__bars { width: 22px; height: 14px; position: relative; flex: none; }
.navtoggle__bars span { position: absolute; left: 0; right: 0; height: 2px; background: var(--ink); transition: transform 0.25s var(--ease), opacity 0.2s var(--ease); }
.navtoggle__bars span:nth-child(1) { top: 0; }
.navtoggle__bars span:nth-child(2) { top: 6px; }
.navtoggle__bars span:nth-child(3) { top: 12px; }
.mainnav.is-open .navtoggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mainnav.is-open .navtoggle__bars span:nth-child(2) { opacity: 0; }
.mainnav.is-open .navtoggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.menu { display: flex; flex-wrap: wrap; }
.menu > li { display: flex; align-items: stretch; position: relative; border-right: 1px solid var(--line); }
.menu > li:first-child { border-left: 1px solid var(--line); }

.menu > li > a {
  display: flex; align-items: center; padding: 0.95rem 1.15rem;
  font-family: var(--font-display); text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.05em;
  position: relative;
}
.menu > li > a::after {
  content: ""; position: absolute; left: 1.15rem; right: 1.15rem; bottom: 0.5rem; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.25s var(--ease);
}
.menu > li > a:hover::after, .menu > li > a:focus-visible::after,
.menu > li.is-open > a::after, .menu > li:hover > a::after { transform: scaleX(1); }

.submenu-toggle { display: flex; align-items: center; justify-content: center; padding: 0 0.9rem 0 0.35rem; flex: none; }
.menu .caret { width: 9px; height: 9px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; margin-top: -4px; transform: rotate(45deg); flex: none; transition: transform 0.2s var(--ease); }
li.has-submenu.is-open > .submenu-toggle .caret,
li.has-submenu:hover > .submenu-toggle .caret,
li.has-submenu:focus-within > .submenu-toggle .caret { transform: rotate(-135deg); }

/* generic submenu (used as-is by level 3 flyouts) */
.submenu {
  position: absolute; top: 100%; left: 0; min-width: 240px; background: var(--paper);
  border: 1px solid var(--ink); box-shadow: 6px 6px 0 var(--line);
  padding: 0.4rem 0; display: none; z-index: 50;
}
.submenu li { display: flex; align-items: stretch; position: relative; }
.submenu li.has-submenu.is-open > .submenu,
.submenu li.has-submenu:hover > .submenu,
.submenu li.has-submenu:focus-within > .submenu { display: block; }
.submenu a, .submenu .menu-link {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 0.5rem 0.6rem 1rem; font-size: 0.85rem; flex: 1 1 auto; min-width: 0; text-align: left;
}
.submenu li > a:hover, .submenu li > a:focus-visible,
.submenu li.is-open > .menu-link, .submenu li:hover > .menu-link { background: var(--ink); color: var(--paper); }
.submenu li.is-open > .submenu-toggle, .submenu li:hover > .submenu-toggle { background: var(--ink); color: var(--paper); }

/* level 3 — flyout to the right of its level-2 parent */
.submenu .submenu { top: -0.4rem; left: 100%; box-shadow: 6px 6px 0 var(--line); }

/* level 1 — normal dropdown under the trigger, opens on hover */
.menu > li.has-submenu.is-open > .submenu,
.menu > li.has-submenu:hover > .submenu,
.menu > li.has-submenu:focus-within > .submenu { display: block; }

@media (max-width: 900px) {
  .navtoggle { display: flex; }
  .mainnav__inner { flex-direction: column; align-items: stretch; }
  .menu { display: none; flex-direction: column; width: 100%; padding-bottom: 1rem; }
  .mainnav.is-open .menu { display: flex; }
  .menu > li { border: 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
  .menu > li:first-child { border-left: 0; }

  .submenu {
    position: static; display: none; border: 0; box-shadow: none; background: var(--panel);
    width: 100%; padding-left: 0.75rem;
  }
  .menu li.has-submenu.is-open > .submenu,
  .menu li.has-submenu:hover > .submenu { display: block; }
  .submenu .submenu { padding-left: 1.25rem; }
}

/* =========================================================
   Hero banner — auto-rotating slideshow (up to 4 slides)
   ========================================================= */
.hero { padding: 0; }
.hero__slides {
  position: relative; overflow: hidden;
  width: 100%; height: min(56vh, 600px); min-height: 260px;
  border-bottom: 1px solid var(--ink);
}
.hero__slide {
  position: absolute; inset: 0; opacity: 0; visibility: hidden; z-index: 0;
  transition: opacity 0.7s var(--ease), visibility 0.7s var(--ease);
}
.hero__slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
.hero__art { position: absolute; inset: 0; }
.hero__art img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero__slides .corner { position: absolute; width: 22px; height: 22px; border: 2px solid var(--accent); z-index: 2; }
.hero__slides .corner--tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.hero__slides .corner--br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }
.hero__copy { position: absolute; left: 0; right: 0; bottom: 0; padding: 1.1rem 1.3rem; background: linear-gradient(0deg, rgba(17,17,17,0.86), transparent); color: #fff; }
.hero__copy p { margin: 0; font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.14em; text-transform: uppercase; color: #e7c3c9; }
.hero__copy h2 { font-size: clamp(1.1rem, 2.4vw, 1.7rem); margin-top: 0.2rem; }

.hero__dots { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); z-index: 3; display: flex; gap: 8px; }
.hero__dot { width: 8px; height: 8px; padding: 0; border-radius: 50%; border: 1px solid rgba(255,255,255,0.7); background: rgba(255,255,255,0.35); cursor: pointer; transition: background 0.2s var(--ease), transform 0.2s var(--ease); }
.hero__dot:hover, .hero__dot:focus-visible { background: rgba(255,255,255,0.7); }
.hero__dot.is-active { background: #fff; transform: scale(1.15); }

.hero__nav {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 38px; height: 38px; border: 1px solid rgba(255,255,255,0.7); border-radius: 50%;
  background: rgba(17,17,17,0.35); color: #fff; font-size: 1.4rem; line-height: 1;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.hero__nav:hover, .hero__nav:focus-visible { background: rgba(17,17,17,0.7); border-color: #fff; }
.hero__nav--prev { left: 14px; }
.hero__nav--next { right: 14px; }
@media (max-width: 640px) { .hero__nav { display: none; } }

@media (max-width: 640px) {
  .hero__slides { height: auto; aspect-ratio: 16 / 5; min-height: 0; }
  .hero__copy { display: none; }
}

/* =========================================================
   Sections / product grid
   ========================================================= */
.section { padding-block: clamp(2rem, 5vw, 4rem); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; margin-bottom: 1.75rem; border-bottom: 2px solid var(--ink); padding-bottom: 0.9rem; flex-wrap: wrap; }
.section-head__eyebrow { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin: 0 0 0.35rem; }
.section-head h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
.section-head__link { font-family: var(--font-mono); font-size: 0.78rem; text-decoration: underline; text-underline-offset: 3px; white-space: nowrap; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
@media (max-width: 1080px) { .product-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) { .product-grid { grid-template-columns: 1fr; } }

.shop-results .product-grid { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1200px) { .shop-results .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .shop-results .product-grid { grid-template-columns: 1fr; } }

.product-card { border: 1px solid var(--line); background: var(--paper); display: flex; flex-direction: column; transition: border-color 0.2s var(--ease), transform 0.2s var(--ease); }
.product-card:hover { border-color: var(--ink); transform: translateY(-3px); }

.product-card__thumb { position: relative; aspect-ratio: 1 / 1; border-bottom: 1px solid var(--line); overflow: hidden; }
.product-card__thumb img { width: 100%; height: 100%; object-fit: contain; object-position: center; display: block; background: var(--panel); }
.thumb-art {
  position: absolute; inset: 0; display: grid; place-items: center; padding: 1rem; text-align: center;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 14px 14px; background-color: var(--panel);
}
.thumb-art span { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--ink-soft); border: 1px dashed var(--line-strong); padding: 0.7rem 0.9rem; background: rgba(250,249,246,0.85); }
.product-card__thumb .corner { position: absolute; width: 16px; height: 16px; border: 2px solid var(--ink); opacity: 0.5; }
.product-card__thumb .corner--tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.product-card__thumb .corner--br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.stock-tag {
  position: absolute; top: 8px; right: 8px; font-family: var(--font-mono); font-size: 0.62rem;
  letter-spacing: 0.06em; text-transform: uppercase; padding: 0.3em 0.55em; border: 1px solid var(--ink);
  background: var(--paper);
}
.stock-tag--instock { background: var(--ink); color: var(--paper); }
.stock-tag--incoming { background: #2980b9; color: #fff; border-color: #2980b9; }
.stock-tag--outofstock { background: #c0392b; color: #fff; border-color: #c0392b; }

.product-card__body { padding: 0.9rem 1rem 1.1rem; display: flex; flex-direction: column; gap: 0.4rem; flex: 1; }
.product-card__brand { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 0; }
.product-card__brand .scale-tag { text-transform: none; letter-spacing: 0.03em; font-size: 0.62rem; }
.product-card__name { font-size: 0.95rem; text-transform: none; letter-spacing: 0; font-family: var(--font-body); font-weight: 600; line-height: 1.35; min-height: 2.6em; }

.product-card__meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.4rem; margin: 0.2rem 0 0; padding-top: 0.55rem; border-top: 1px dashed var(--line); }
.product-card__meta div { display: flex; flex-direction: column; gap: 0.15rem; }
.product-card__meta dt { font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.product-card__meta dd { margin: 0; font-family: var(--font-mono); font-size: 0.78rem; }

.scale-tag {
  display: inline-block; background: var(--ink); color: var(--paper);
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.03em;
  padding: 0.15em 0.55em;
}

.product-card__footer { display: flex; align-items: center; justify-content: space-between; margin-top: 0.6rem; }
.product-card__price { font-family: var(--font-mono); font-size: 1.05rem; font-weight: 700; margin: 0; display: flex; align-items: baseline; gap: 0.45rem; flex-wrap: wrap; }
.product-card__price .price-old { font-size: 0.72em; font-weight: 500; color: var(--muted); text-decoration: line-through; }
.product-card__price .price-sale { color: var(--accent); }
.product-card__cta { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; border: 1px solid var(--ink); padding: 0.4em 0.7em; transition: background 0.2s var(--ease), color 0.2s var(--ease); }
.product-card__cta:hover, .product-card__cta:focus-visible { background: var(--ink); color: var(--paper); }

.placeholder-section { padding-block: clamp(3rem, 10vw, 6rem); text-align: center; }
.placeholder-section p { color: var(--muted); }

/* =========================================================
   News grid
   ========================================================= */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
@media (max-width: 1080px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) { .news-grid { grid-template-columns: 1fr; } }

.news-card { display: flex; flex-direction: column; }
.news-card__thumb { position: relative; display: block; aspect-ratio: 16 / 10; border: 1px solid var(--line); overflow: hidden; transition: border-color 0.2s var(--ease); }
.news-card:hover .news-card__thumb, .news-card__thumb:focus-visible { border-color: var(--ink); }
.news-card__thumb .corner { position: absolute; width: 16px; height: 16px; border: 2px solid var(--ink); opacity: 0.5; }
.news-card__thumb .corner--tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.news-card__thumb .corner--br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }
.news-card__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.news-card__body { padding-top: 0.85rem; }
.news-card__meta { display: flex; align-items: center; gap: 0.6rem; margin: 0 0 0.5rem; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; }
.news-card__tag { text-transform: uppercase; color: var(--accent); }
.news-card__meta time { color: var(--muted); }
.news-card__meta time::before { content: "·"; margin-right: 0.6rem; color: var(--line-strong); }
.news-card__title { font-family: var(--font-body); text-transform: none; letter-spacing: 0; font-size: 0.98rem; font-weight: 600; line-height: 1.4; }
.news-card__title a { transition: color 0.2s var(--ease); }
.news-card__title a:hover, .news-card__title a:focus-visible { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.news-card__excerpt { margin: 0.5rem 0 0; font-size: 0.88rem; line-height: 1.6; color: var(--muted); }

/* =========================================================
   Shop layout — filters (left) + results (right)
   ========================================================= */
.shop-layout { display: grid; grid-template-columns: 264px 1fr; align-items: start; gap: clamp(1.5rem, 3vw, 2.5rem); }
@media (max-width: 900px) { .shop-layout { grid-template-columns: 1fr; } }

.shop-filters { border: 1px solid var(--ink); padding: 1.25rem; position: sticky; top: 1rem; }
@media (max-width: 900px) { .shop-filters { position: static; } }

.shop-filters__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.1rem; padding-bottom: 0.9rem; border-bottom: 2px solid var(--ink); }
.shop-filters__head h2 { font-size: 1rem; }
.shop-filters__reset { font-family: var(--font-mono); font-size: 0.7rem; text-decoration: underline; text-underline-offset: 3px; color: var(--muted); }
.shop-filters__reset:hover, .shop-filters__reset:focus-visible { color: var(--accent); }

.shop-filters__toggle {
  display: none; width: 100%; align-items: center; justify-content: space-between;
  padding: 0.65rem 0.2rem; margin-bottom: 0.5rem;
  font-family: var(--font-display); text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.05em;
}
.shop-filters__toggle-caret {
  width: 9px; height: 9px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  margin-top: -4px; transform: rotate(45deg); transition: transform 0.2s var(--ease); flex: none;
}
.shop-filters.is-open .shop-filters__toggle-caret { transform: rotate(-135deg); }

@media (max-width: 900px) {
  .shop-filters__head h2 { display: none; }
  .shop-filters__toggle { display: flex; }
  .shop-filters__body { display: none; }
  .shop-filters.is-open .shop-filters__body { display: block; }
}

.shop-search { position: relative; margin-bottom: 1.35rem; }
.shop-search input {
  width: 100%; font: inherit; font-family: var(--font-body); font-size: 0.85rem; padding: 0.65rem 0.8rem 0.65rem 2.2rem;
  border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink);
}
.shop-search input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.shop-search svg { position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--muted); pointer-events: none; }

.filter-group { border: 0; padding: 0; margin: 0 0 1.35rem; }
.filter-group + .filter-group { padding-top: 1.1rem; border-top: 1px dashed var(--line); }
.filter-group legend { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); padding: 0 0 0.6rem; }
.filter-option { display: flex; align-items: center; gap: 0.55rem; padding: 0.3rem 0; font-size: 0.85rem; cursor: pointer; }
.filter-option input { appearance: none; width: 15px; height: 15px; border: 1.5px solid var(--ink); flex: none; display: grid; place-items: center; }
.filter-option input::after { content: ""; width: 8px; height: 8px; background: var(--accent); transform: scale(0); transition: transform 0.15s var(--ease); }
.filter-option input:checked::after { transform: scale(1); }
.filter-option input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.filter-option__count { margin-left: auto; font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); }

.shop-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.shop-toolbar p { margin: 0; font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.shop-toolbar strong { color: var(--ink); }

.shop-empty { display: none; padding: 3rem 1rem; text-align: center; color: var(--muted); border: 1px dashed var(--line-strong); }
.shop-empty.is-visible { display: block; }

.pagination { display: flex; align-items: center; justify-content: center; gap: 0.4rem; margin-top: 2.25rem; flex-wrap: wrap; }
.pagination button {
  min-width: 36px; height: 36px; padding: 0 0.6rem; border: 1px solid var(--ink); font-family: var(--font-mono); font-size: 0.8rem;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.pagination button:hover, .pagination button:focus-visible { background: var(--ink); color: var(--paper); }
.pagination button[aria-current="page"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.pagination button:disabled { opacity: 0.35; cursor: not-allowed; }
.pagination button:disabled:hover { background: var(--paper); color: var(--ink); }

/* =========================================================
   Showcase (Trưng bày) — horizontal filter bar + 4-column grid
   ========================================================= */
.showcase-filterbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.85rem;
  border: 1px solid var(--ink); padding: 0.85rem 1.1rem; margin-bottom: 1.75rem;
}
.showcase-filterbar__search { position: relative; flex: 1 1 260px; }
.showcase-filterbar__search input {
  width: 100%; font: inherit; font-family: var(--font-body); font-size: 0.85rem; padding: 0.6rem 0.8rem 0.6rem 2.2rem;
  border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink);
}
.showcase-filterbar__search input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.showcase-filterbar__search svg { position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--muted); pointer-events: none; }

.showcase-filterbar select {
  font: inherit; font-family: var(--font-body); font-size: 0.85rem; padding: 0.6rem 2rem 0.6rem 0.8rem;
  border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink); flex: 0 1 200px;
}
.showcase-filterbar select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.showcase-filterbar__reset {
  font-family: var(--font-mono); font-size: 0.72rem; text-decoration: underline; text-underline-offset: 3px;
  color: var(--muted); white-space: nowrap; margin-left: auto;
}
.showcase-filterbar__reset:hover, .showcase-filterbar__reset:focus-visible { color: var(--accent); }

@media (max-width: 640px) {
  .showcase-filterbar { flex-direction: column; align-items: stretch; }
  .showcase-filterbar select { flex: 1 1 auto; }
  .showcase-filterbar__reset { margin-left: 0; }
}

.showcase-toolbar { margin: 0 0 1.25rem; font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.showcase-toolbar strong { color: var(--ink); }

.showcase-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
@media (max-width: 1100px) { .showcase-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px) { .showcase-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) { .showcase-grid { grid-template-columns: 1fr; } }

.showcase-card { border: 1px solid var(--line); background: var(--paper); display: flex; flex-direction: column; transition: border-color 0.2s var(--ease), transform 0.2s var(--ease); }
.showcase-card:hover { border-color: var(--ink); transform: translateY(-3px); }

.showcase-card__thumb { position: relative; aspect-ratio: 4 / 5; border-bottom: 1px solid var(--line); overflow: hidden; display: block; }
.showcase-card__thumb img { width: 100%; height: 100%; object-fit: contain; object-position: center; display: block; background: var(--panel); }
.showcase-card__thumb .corner { position: absolute; width: 16px; height: 16px; border: 2px solid var(--ink); opacity: 0.5; }
.showcase-card__thumb .corner--tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.showcase-card__thumb .corner--br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.showcase-card__body { padding: 0.85rem 0.95rem 1rem; display: flex; flex-direction: column; gap: 0.4rem; flex: 1; }
.showcase-card__name { font-size: 0.92rem; text-transform: none; letter-spacing: 0; font-family: var(--font-body); font-weight: 600; line-height: 1.35; min-height: 2.5em; }

.showcase-card__meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.4rem; margin: 0.2rem 0 0; padding-top: 0.55rem; border-top: 1px dashed var(--line); }
.showcase-card__meta div { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.showcase-card__meta-full { grid-column: 1 / -1; }
.showcase-card__meta dt { font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.showcase-card__meta dd { margin: 0; font-family: var(--font-mono); font-size: 0.78rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/*
 * Narrower thumbnail column for the showcase detail page (reuses
 * .detail-layout from the product detail page, which is defined further
 * down the file — the compound selector below outweighs it regardless of
 * source order so this override always wins on non-mobile widths).
 */
.detail-layout.detail-layout--compact-media { grid-template-columns: 320px 1fr; }
@media (max-width: 860px) { .detail-layout.detail-layout--compact-media { grid-template-columns: 1fr; } }
@media (max-width: 460px) { .detail-layout--compact-media .detail-gallery { max-width: 320px; margin-inline: auto; } }

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--ink); color: #d8d6cf; }
.footer-main { padding-block: clamp(2.5rem, 5vw, 4rem); display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--gap); }
@media (max-width: 900px) { .footer-main { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-main { grid-template-columns: 1fr; } }

.footer-col h3 { font-size: 0.78rem; letter-spacing: 0.1em; color: #fff; margin-bottom: 1rem; }
.footer-col p { color: #a9a79f; font-size: 0.88rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a { color: #d8d6cf; font-size: 0.88rem; transition: color 0.2s var(--ease); }
.footer-col a:hover, .footer-col a:focus-visible { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

.footer-social a { display: inline-flex; align-items: center; gap: 0.55em; }
.footer-social svg { width: 15px; height: 15px; flex: none; color: #a9a79f; transition: color 0.2s var(--ease); }
.footer-social a:hover svg, .footer-social a:focus-visible svg { color: #fff; }

.footer-logo { display: flex; align-items: center; gap: 0.65rem; margin-bottom: 1rem; }
.footer-logo .logo__mark { border-color: #fff; }
.footer-logo strong { color: #fff; font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.03em; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.14); padding-block: 1.1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-family: var(--font-mono); font-size: 0.72rem; color: #8f8d85; }
.footer-bottom a { color: #8f8d85; }
.footer-bottom a:hover, .footer-bottom a:focus-visible { color: #fff; }

/* =========================================================
   Contact page
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 3vw, 3rem); align-items: start; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-intro p { margin: 0 0 1rem; color: var(--ink-soft); }
.contact-intro p:last-child { margin-bottom: 0; }
.contact-info__list { display: flex; flex-direction: column; gap: 1.1rem; margin-top: 1.5rem; }
.contact-info__item { display: flex; align-items: flex-start; gap: 0.9rem; }
.contact-info__icon {
  flex: none; width: 40px; height: 40px; border: 1px solid var(--ink); display: grid; place-items: center;
}
.contact-info__icon svg { width: 18px; height: 18px; }
.contact-info__item dt { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.2rem; }
.contact-info__item dd { margin: 0; font-size: 0.95rem; }
.contact-info__item dd a { text-decoration: underline; text-underline-offset: 3px; }

.contact-map { margin-top: 1.75rem; aspect-ratio: 16 / 9; border: 1px solid var(--ink); position: relative; overflow: hidden; }
.contact-map .corner { position: absolute; width: 18px; height: 18px; border: 2px solid var(--accent); }
.contact-map .corner--tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.contact-map .corner--br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.contact-form { border: 1px solid var(--ink); padding: clamp(1.25rem, 3vw, 2rem); }
.form-field { margin-bottom: 1.1rem; }
.form-field label { display: block; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.4rem; }
.form-field input, .form-field textarea {
  width: 100%; font: inherit; font-family: var(--font-body); font-size: 0.9rem; padding: 0.65rem 0.8rem;
  border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink); resize: vertical;
}
.form-field input:focus-visible, .form-field textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.contact-form__submit {
  font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.85rem;
  padding: 0.75rem 1.5rem; background: var(--ink); color: var(--paper); border: 1px solid var(--ink);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.contact-form__submit:hover, .contact-form__submit:focus-visible { background: var(--paper); color: var(--ink); }

/* =========================================================
   Product detail page
   ========================================================= */
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); margin-bottom: 1.5rem; }
.breadcrumb a { text-decoration: underline; text-underline-offset: 3px; }
.breadcrumb a:hover, .breadcrumb a:focus-visible { color: var(--accent); }
.breadcrumb span[aria-hidden] { color: var(--line-strong); }

.detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 3vw, 3rem); align-items: start; }
@media (max-width: 860px) { .detail-layout { grid-template-columns: 1fr; } }

.detail-gallery__main { position: relative; aspect-ratio: 1 / 1; border: 1px solid var(--ink); overflow: hidden; background: var(--panel); }
.detail-gallery__main img { width: 100%; height: 100%; object-fit: contain; display: block; }
.detail-gallery__main .corner { position: absolute; width: 22px; height: 22px; border: 2px solid var(--accent); }
.detail-gallery__main .corner--tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.detail-gallery__main .corner--br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }

.detail-gallery__thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.6rem; margin-top: 0.75rem; }
.detail-gallery__thumb { aspect-ratio: 1 / 1; border: 1px solid var(--line-strong); background: var(--panel); position: relative; overflow: hidden; padding: 0; transition: border-color 0.2s var(--ease); }
.detail-gallery__thumb.is-active { border-color: var(--ink); border-width: 2px; }
.detail-gallery__thumb:hover, .detail-gallery__thumb:focus-visible { border-color: var(--ink); }
.detail-gallery__thumb span { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted); }
.detail-gallery__thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }

.detail-info__brand { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 0 0 0.4rem; }
.detail-info__name { font-size: clamp(1.3rem, 2.6vw, 1.9rem); margin: 0 0 0.9rem; }
.detail-info__price { display: flex; align-items: baseline; gap: 0.6rem; font-family: var(--font-mono); font-size: 1.6rem; font-weight: 700; margin-bottom: 0.9rem; }
.detail-info__price .price-old { font-size: 0.55em; font-weight: 500; color: var(--muted); text-decoration: line-through; }
.detail-info__price .price-sale { color: var(--accent); }
.detail-info .stock-tag { position: static; display: inline-block; margin-bottom: 0.9rem; }

.detail-info__specs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin: 1.25rem 0; padding: 1.1rem 0; border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line); }
.detail-info__specs dt { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.15rem; }
.detail-info__specs dd { margin: 0; font-size: 0.95rem; }

.detail-info__short-desc { font-size: 0.92rem; color: var(--ink-soft); margin: 0 0 1.5rem; }

.detail-info__actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.detail-info__cta {
  font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.85rem;
  padding: 0.85rem 1.5rem; background: var(--ink); color: var(--paper); border: 1px solid var(--ink);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.detail-info__cta:hover, .detail-info__cta:focus-visible { background: var(--paper); color: var(--ink); }
.detail-info__cta--ghost { background: var(--paper); color: var(--ink); }
.detail-info__cta--ghost:hover, .detail-info__cta--ghost:focus-visible { background: var(--ink); color: var(--paper); }

.detail-description { margin-top: clamp(2.5rem, 5vw, 4rem); padding-top: clamp(1.5rem, 3vw, 2.5rem); border-top: 2px solid var(--ink); width: 100%; }
.detail-description h2 { font-size: 1.1rem; margin-bottom: 1rem; max-width: 760px; margin-inline: auto; }
.detail-description > div { max-width: 760px; margin-inline: auto; }
.detail-description p { margin: 0 0 1rem; color: var(--ink-soft); }
.detail-description img { max-width: 100%; height: auto; }
.detail-description figure.image { max-width: 100%; margin: 0 0 1rem; text-align: center; }
.detail-description figure.image img { margin: 0 auto; }
.detail-description figcaption { font-size: 0.82rem; color: var(--muted); margin-top: 0.4rem; }

/* Rich-text (CKEditor) content — headings, lists, tables, quotes, links.
   Shared with .article-body (tin tức) since both render the same kind of
   admin-authored HTML. */
.detail-description h3, .article-body h3,
.detail-description h4, .article-body h4 { max-width: 760px; margin-inline: auto; color: var(--ink); }
.detail-description h3, .article-body h3 { font-size: 1.02rem; margin: 1.75rem auto 0.75rem; }
.detail-description h4, .article-body h4 { font-size: 0.94rem; margin: 1.5rem auto 0.6rem; }

.detail-description ul, .article-body ul,
.detail-description ol, .article-body ol { max-width: 760px; margin: 0 auto 1rem; padding-left: 1.2rem; color: var(--ink-soft); }
.detail-description ul, .article-body ul { list-style: disc; }
.detail-description ol, .article-body ol { list-style: decimal; }
.detail-description li, .article-body li { margin-bottom: 0.4rem; }

.detail-description a, .article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

.detail-description blockquote, .article-body blockquote {
  max-width: 760px; margin: 0 auto 1rem; padding-left: 1rem;
  border-left: 3px solid var(--line-strong); color: var(--muted); font-style: italic;
}

.detail-description figure.table, .article-body figure.table { max-width: 100%; margin: 0 auto 1.25rem; overflow-x: auto; }
.detail-description table, .article-body table {
  width: 100%; max-width: 760px; margin: 0 auto; border-collapse: collapse; font-size: 0.92rem; text-align: left;
}
.detail-description th, .article-body th,
.detail-description td, .article-body td { border: 1px solid var(--line-strong); padding: 0.5rem 0.7rem; vertical-align: top; }
.detail-description th, .article-body th { background: var(--panel); font-weight: 600; }

/* CKEditor image styles: block (default, centered — already covered by
   figure.image above), align-left/align-right (floated, text wraps
   around), and inline (small image sitting within a line of text). */
.detail-description figure.image-style-block, .article-body figure.image-style-block { margin-inline: auto; }
.detail-description figure.image-style-align-left, .article-body figure.image-style-align-left {
  float: left; margin: 0.3rem 1.25rem 1rem 0; max-width: min(45%, 340px);
}
.detail-description figure.image-style-align-right, .article-body figure.image-style-align-right {
  float: right; margin: 0.3rem 0 1rem 1.25rem; max-width: min(45%, 340px);
}
.detail-description img.image-inline, .article-body img.image-inline,
.detail-description .image-inline img, .article-body .image-inline img {
  display: inline; vertical-align: middle; max-height: 1.6em; width: auto; margin: 0 0.2em;
}

/* =========================================================
   Article detail page (Tin tức / Tài liệu)
   ========================================================= */
.article-header { max-width: 70ch; margin: 0 auto 1.5rem; }
.article-header__meta { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 0.75rem; }
.article-header__tag { color: var(--accent); }
.article-header__date { color: var(--muted); }
.article-header__date:not(:empty)::before { content: "·"; margin-right: 0.5rem; color: var(--line-strong); }
.article-header h1 { font-size: clamp(1.5rem, 3.4vw, 2.3rem); line-height: 1.25; }

.article-hero { position: relative; aspect-ratio: 21 / 9; border: 1px solid var(--ink); overflow: hidden; margin: 0 auto clamp(1.75rem, 4vw, 2.75rem); max-width: 900px; }
.article-hero .corner { position: absolute; width: 22px; height: 22px; border: 2px solid var(--accent); }
.article-hero .corner--tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.article-hero .corner--br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }
.article-hero img { width: 100%; height: 100%; object-fit: cover; display: block; }

.article-body { max-width: 70ch; margin: 0 auto; font-size: 1.03rem; line-height: 1.8; color: var(--ink-soft); text-align: justify; text-justify: inter-word; }
.article-body p { margin: 0 0 1.3rem; }
.article-body .article-lead { font-size: 1.12rem; font-weight: 500; color: var(--ink); }
.article-body img { max-width: 100%; height: auto; }
.article-body figure.image { max-width: 100%; margin: 0 0 1.3rem; text-align: center; }
.article-body figure.image img { margin: 0 auto; }
.article-body figcaption { font-size: 0.82rem; color: var(--muted); margin-top: 0.4rem; }

.article-pdf {
  max-width: 70ch; margin: clamp(2rem, 4vw, 3rem) auto 0; border: 1px solid var(--ink);
  padding: 1.1rem 1.3rem; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.article-pdf[hidden] { display: none; }
.article-pdf__icon {
  flex: none; width: 44px; height: 44px; border: 1px solid var(--ink); display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 0.62rem; font-weight: 700; letter-spacing: 0.04em;
  background: var(--ink); color: var(--paper);
}
.article-pdf__info { flex: 1; min-width: 0; }
.article-pdf__name { display: block; font-weight: 600; font-size: 0.92rem; overflow-wrap: anywhere; }
.article-pdf__size { display: block; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); margin-top: 0.15rem; }
.article-pdf__btn {
  flex: none; font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.8rem;
  padding: 0.65rem 1.2rem; background: var(--ink); color: var(--paper); border: 1px solid var(--ink);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.article-pdf__btn:hover, .article-pdf__btn:focus-visible { background: var(--paper); color: var(--ink); }

.article-back { max-width: 70ch; margin: clamp(2rem, 4vw, 3rem) auto 0; }
.article-back a { font-family: var(--font-mono); font-size: 0.8rem; text-decoration: underline; text-underline-offset: 3px; }
.article-back a:hover, .article-back a:focus-visible { color: var(--accent); }

/* =========================================================
   Documents (Tài liệu) — horizontal filter bar + PDF list
   ========================================================= */
.docs-filterbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.85rem;
  border: 1px solid var(--ink); padding: 0.85rem 1.1rem; margin-bottom: 1.75rem;
}
.docs-filterbar__search { position: relative; flex: 1 1 260px; }
.docs-filterbar__search input {
  width: 100%; font: inherit; font-family: var(--font-body); font-size: 0.85rem; padding: 0.6rem 0.8rem 0.6rem 2.2rem;
  border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink);
}
.docs-filterbar__search input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.docs-filterbar__search svg { position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--muted); pointer-events: none; }

.docs-filterbar select {
  font: inherit; font-family: var(--font-body); font-size: 0.85rem; padding: 0.6rem 2rem 0.6rem 0.8rem;
  border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink); flex: 0 1 200px;
}
.docs-filterbar select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.docs-filterbar__reset {
  font-family: var(--font-mono); font-size: 0.72rem; text-decoration: underline; text-underline-offset: 3px;
  color: var(--muted); white-space: nowrap; margin-left: auto;
}
.docs-filterbar__reset:hover, .docs-filterbar__reset:focus-visible { color: var(--accent); }

@media (max-width: 640px) {
  .docs-filterbar { flex-direction: column; align-items: stretch; }
  .docs-filterbar select { flex: 1 1 auto; }
  .docs-filterbar__reset { margin-left: 0; }
}

.docs-toolbar { margin: 0 0 1.25rem; font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); }
.docs-toolbar strong { color: var(--ink); }

.docs-table-wrap { border: 1px solid var(--ink); overflow-x: auto; }
.docs-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.docs-table th, .docs-table td { padding: 0.75rem 1rem; text-align: left; vertical-align: middle; border-bottom: 1px solid var(--line); white-space: nowrap; }
.docs-table thead th {
  background: var(--ink); color: var(--paper); font-family: var(--font-mono); font-size: 0.68rem;
  text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; border-bottom: 0;
}
.docs-row:hover { background: var(--panel); }
.docs-row:last-child td { border-bottom: 0; }

.docs-row__title { display: flex; align-items: center; gap: 0.6rem; font-weight: 600; }
.docs-row__icon {
  flex: none; width: 30px; height: 30px; border: 1px solid var(--ink); display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 0.56rem; font-weight: 700; letter-spacing: 0.03em;
  background: var(--ink); color: var(--paper);
}
.docs-row__download {
  font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em;
  padding: 0.45em 0.8em; border: 1px solid var(--ink); display: inline-block; transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.docs-row__download:hover, .docs-row__download:focus-visible { background: var(--ink); color: var(--paper); }

@media (max-width: 700px) {
  .docs-table thead { display: none; }
  .docs-table, .docs-table tbody, .docs-table tr, .docs-table td { display: block; width: 100%; }
  .docs-row { border-bottom: 1px solid var(--line); padding: 0.85rem 1rem; }
  .docs-table td { padding: 0.2rem 0; border-bottom: 0; white-space: normal; }
}

/* =========================================================
   AI chat widget (trợ lý tư vấn)
   ========================================================= */
.chatbox { position: fixed; right: clamp(1rem, 3vw, 2rem); bottom: clamp(1rem, 3vw, 2rem); z-index: 70; }

.chatbox__toggle {
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  background: var(--ink); color: var(--paper); border: 1px solid var(--ink); cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.chatbox__toggle:hover, .chatbox__toggle:focus-visible { background: var(--accent); border-color: var(--accent); }
.chatbox__icon { width: 24px; height: 24px; }
.chatbox__icon--close { display: none; }
.chatbox.is-open .chatbox__icon--open { display: none; }
.chatbox.is-open .chatbox__icon--close { display: block; }
.chatbox__toggle-avatar { width: 42px; height: 42px; border-radius: 50%; object-fit: cover; }

.chatbox__panel {
  position: absolute; right: 0; bottom: calc(100% + 0.75rem); width: min(360px, calc(100vw - 2rem));
  max-height: min(560px, calc(100vh - 7rem)); display: flex; flex-direction: column;
  background: var(--paper); border: 1px solid var(--ink); box-shadow: 8px 8px 0 var(--line-strong);
}
.chatbox__panel[hidden] { display: none; }

.chatbox__header { display: flex; align-items: center; gap: 0.65rem; padding: 0.9rem 1rem; background: var(--ink); color: var(--paper); }
.chatbox__header > div { flex: 1; min-width: 0; }
.chatbox__header-avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; flex: none; border: 1px solid rgba(250,249,246,0.4); }
.chatbox__title { margin: 0; font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.85rem; }
.chatbox__subtitle { margin: 0.15rem 0 0; font-family: var(--font-mono); font-size: 0.68rem; color: rgba(250,249,246,0.7); }
.chatbox__reset { flex: none; width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; color: var(--paper); border: 1px solid rgba(250,249,246,0.4); background: transparent; cursor: pointer; transition: border-color 0.2s var(--ease); }
.chatbox__reset:hover, .chatbox__reset:focus-visible { border-color: var(--paper); }
.chatbox__reset svg { width: 15px; height: 15px; }

.chatbox__messages { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: 0.7rem; background: var(--panel); }

.chatbox__msg { max-width: 84%; }
.chatbox__msg p { margin: 0; font-size: 0.86rem; line-height: 1.55; padding: 0.55rem 0.75rem; border: 1px solid var(--line-strong); white-space: pre-wrap; }
.chatbox__msg--bot { align-self: flex-start; display: flex; align-items: flex-end; gap: 0.4rem; }
.chatbox__msg--bot p { background: var(--paper); color: var(--ink); min-width: 0; }
.chatbox__msg--user { align-self: flex-end; }
.chatbox__msg--user p { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.chatbox__avatar { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; flex: none; border: 1px solid var(--line-strong); }

.chatbox__msg--typing { padding: 0; }
.chatbox__typing-dots { display: flex; align-items: center; gap: 0.3rem; padding: 0.65rem 0.8rem; border: 1px solid var(--line-strong); background: var(--paper); }
.chatbox__typing-dots span { width: 6px; height: 6px; background: var(--muted); display: inline-block; animation: chatbox-typing 1s infinite ease-in-out; }
.chatbox__typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.chatbox__typing-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes chatbox-typing { 0%, 60%, 100% { opacity: 0.25; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-3px); } }

.chatbox__products { display: flex; flex-direction: column; gap: 0.5rem; }
.chatbox__product {
  display: flex; align-items: center; gap: 0.65rem; padding: 0.5rem; border: 1px solid var(--line-strong);
  background: var(--paper); transition: border-color 0.2s var(--ease);
}
.chatbox__product:hover, .chatbox__product:focus-visible { border-color: var(--ink); }
.chatbox__product img, .chatbox__product-placeholder { width: 44px; height: 44px; object-fit: contain; background: var(--panel); border: 1px solid var(--line); flex: none; }
.chatbox__product-info { display: flex; flex-direction: column; gap: 0.1rem; min-width: 0; }
.chatbox__product-info strong { font-size: 0.8rem; font-weight: 600; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.chatbox__product-meta { font-family: var(--font-mono); font-size: 0.66rem; color: var(--muted); }
.chatbox__product-price { font-family: var(--font-mono); font-size: 0.76rem; font-weight: 700; color: var(--accent); }

.chatbox__form { display: flex; border-top: 1px solid var(--ink); }
.chatbox__input { flex: 1; border: 0; padding: 0.8rem 0.9rem; font: inherit; font-size: 0.86rem; background: var(--paper); color: var(--ink); }
.chatbox__input:focus-visible { outline: none; background: var(--panel); }
.chatbox__send { flex: none; width: 48px; display: flex; align-items: center; justify-content: center; background: var(--ink); color: var(--paper); border: 0; border-left: 1px solid var(--ink); cursor: pointer; transition: background 0.2s var(--ease); }
.chatbox__send:hover, .chatbox__send:focus-visible { background: var(--accent); }
.chatbox__send svg { width: 17px; height: 17px; }

@media (max-width: 480px) {
  .chatbox__panel { position: fixed; right: 0.5rem; left: 0.5rem; bottom: calc(clamp(1rem, 3vw, 2rem) + 66px); width: auto; }
}