/* ==========================================================================
   Nanjing Huaxin — Global styles
   Revised in Phase 2 to match the real Dideu reference (dense, muted, plain
   rows, left product sidebar) rather than the polished Phase 1 draft.
   ========================================================================== */

@import "tokens.css";

/* --- Reset -------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, figure, table { margin: 0; padding: 0; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Base document ------------------------------------------------------ */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-ink);
  background: var(--color-bg);
}

/* --- Headings (serif — ties to logo wordmark) --------------------------- */
h1, h2, h3, h4 { font-family: var(--font-serif); color: var(--color-ink); line-height: var(--lh-tight); font-weight: 600; }
h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }
p { margin-bottom: var(--space-3); }

/* --- Layout ------------------------------------------------------------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--space-4); }
.prose { max-width: var(--maxw-text); }
.prose p { line-height: var(--lh-base); }
.section { padding: var(--space-6) 0; }
.section--alt { background-color: var(--color-bg-alt); background-image: var(--tex-hex-light), var(--grad-band); }
.section--band { background: var(--color-bg-band); }

/* --- Dense data table (catalog workhorse; no stripe, muted header) ------- */
.data-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); border: 1px solid var(--color-table-line); }
.data-table thead th {
  background: var(--grad-steel);
  color: var(--color-table-head-ink);
  font-family: var(--font-sans);
  font-weight: 600;
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-table-head-line);
  white-space: nowrap;
}
.data-table tbody td { padding: var(--space-2) var(--space-3); border: 1px solid var(--color-table-line); vertical-align: top; }
.data-table tbody tr:hover { background: var(--color-table-row-hover); }
.data-table .cas { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--color-ink-soft); }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* --- Flag / status styling (R&D-only notices) --------------------------- */
.flag { color: var(--color-flag); background: var(--color-flag-bg); border: 1px solid var(--color-flag); border-radius: var(--radius); padding: 0 var(--space-2); font-size: var(--fs-xs); font-weight: 700; }

/* --- Utility ------------------------------------------------------------ */
.muted { color: var(--color-muted); }
.small { font-size: var(--fs-sm); }
.nowrap { white-space: nowrap; }

/* --- Top contact bar ---------------------------------------------------- */
.topbar { background: var(--grad-topbar); border-bottom: var(--border); font-size: var(--fs-xs); }
.topbar__row { display: flex; justify-content: space-between; align-items: center; padding: var(--space-1) var(--space-4); gap: var(--space-4); flex-wrap: wrap; }
.topbar__contact { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.topbar__item { color: var(--color-ink-soft); }
.topbar__util { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.topbar__util a { color: var(--color-ink-soft); }
.topbar__util a:last-child { color: var(--color-accent); font-weight: 700; }
.topbar__sep { color: var(--color-line-strong); }

/* Footer friendly-links row */

/* --- Main nav (flat; Products is a plain link — sidebar handles categories) */
.mainnav { background: var(--color-bg); border-bottom: 3px solid var(--color-accent); }
.mainnav__row { display: flex; align-items: center; justify-content: space-between; padding: var(--space-3) var(--space-4); gap: var(--space-5); flex-wrap: wrap; }
.mainnav__brand { display: inline-block; }
.mainnav__logo { height: 58px; width: auto; }
.mainnav__list { list-style: none; display: flex; gap: var(--space-5); flex-wrap: wrap; }
.mainnav__link { font-family: var(--font-sans); font-size: var(--fs-base); font-weight: 600; color: var(--color-ink); padding: var(--space-2) 0; border-bottom: 2px solid transparent; display: inline-block; }
.mainnav__link:hover, .mainnav__link--active { color: var(--color-accent); border-bottom-color: var(--color-accent); text-decoration: none; }

/* --- Footer (dense, text-packed) ---------------------------------------- */
.site-footer { background: var(--grad-footer); color: var(--color-footer-ink); margin-top: var(--space-7); }
.site-footer h4 { color: #fff; font-family: var(--font-sans); font-size: var(--fs-base); margin-bottom: var(--space-2); }
.site-footer a { color: #fff; }
.site-footer__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); padding: var(--space-6) var(--space-4); border-bottom: 1px solid #444; }
.site-footer__bottom { padding: var(--space-3) var(--space-4); font-size: var(--fs-xs); color: var(--color-muted); }

/* --- Breadcrumb --------------------------------------------------------- */
.breadcrumb { font-size: var(--fs-xs); color: var(--color-muted); padding: var(--space-3) var(--space-4) 0; max-width: var(--maxw); margin: 0 auto; }
.breadcrumb a { color: var(--color-ink-soft); }
.breadcrumb .sep { margin: 0 var(--space-1); }

/* --- Product layout: persistent left sidebar (matches reference) --------- */
.product-layout { max-width: var(--maxw); margin: 0 auto; padding: var(--space-5) var(--space-4) 0; display: grid; grid-template-columns: 232px 1fr; gap: var(--space-6); align-items: start; }
.product-sidebar { border: 1px solid var(--color-line); background-color: var(--color-bg); background-image: var(--tex-hex-light); }
.product-sidebar__head { background-color: var(--color-accent); background-image: var(--tex-hex-dark), var(--grad-accent); color: #fff; font-family: var(--font-serif); font-size: var(--fs-md); padding: var(--space-3) var(--space-3); }
.product-sidebar a { background: transparent; }
.product-sidebar ul { list-style: none; }
.product-sidebar li { border-top: 1px solid var(--color-line); }
.product-sidebar li:first-child { border-top: 0; }
.product-sidebar a { display: block; padding: var(--space-2) var(--space-3); color: var(--color-ink); font-size: var(--fs-sm); }
.product-sidebar a:hover { background: var(--color-bg-alt); text-decoration: none; color: var(--color-accent); }
.product-sidebar li.is-active a { background: var(--color-accent-pale); color: var(--color-accent); font-weight: 700; border-left: 3px solid var(--color-accent); }
.product-main { min-width: 0; }  /* allow table-scroll to shrink in grid   */

/* --- Category page ------------------------------------------------------ */
.category-header { padding-bottom: var(--space-3); border-bottom: 2px solid var(--color-accent); margin-bottom: var(--space-4); }
.category-header h1 { font-size: var(--fs-xl); }
.category-note { font-style: italic; color: var(--color-ink-soft); margin-top: var(--space-4); font-size: var(--fs-sm); }
.category-fdf { margin-top: var(--space-6); }
.category-fdf h2 { font-size: var(--fs-lg); margin-bottom: var(--space-3); }

/* --- Product detail ----------------------------------------------------- */
.detail__specs { border: 1px solid var(--color-line-strong); margin: var(--space-5) 0; display: grid; grid-template-columns: 200px 1fr; }
.detail__specs dt { padding: var(--space-2) var(--space-3); background: var(--color-bg-alt); font-weight: 700; border-bottom: var(--border); margin: 0; }
.detail__specs dd { padding: var(--space-2) var(--space-3); border-bottom: var(--border); margin: 0; }
.detail__notice { background: var(--color-accent-pale); border-left: 3px solid var(--color-accent); padding: var(--space-3) var(--space-4); font-size: var(--fs-sm); margin: var(--space-5) 0; }
.btn { display: inline-block; background: var(--grad-accent); color: #fff; font-weight: 600; padding: var(--space-2) var(--space-5); border: 1px solid var(--color-accent-dark); border-radius: var(--radius); }
.btn:hover { background: var(--color-accent-dark); text-decoration: none; }

/* --- Contact page ------------------------------------------------------- */
.contact__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); margin-top: var(--space-5); }
.contact__item { border: 1px solid var(--color-line); padding: var(--space-3) var(--space-4); }
.contact__label { font-weight: 700; margin-bottom: var(--space-1); }
.contact__value.flag { display: inline-block; }

/* --- News empty state --------------------------------------------------- */
.news-empty { border: 1px dashed var(--color-line-strong); padding: var(--space-6); text-align: center; color: var(--color-muted); margin-top: var(--space-5); }

/* ==========================================================================
   Homepage (Phase 2.2 composition)
   ========================================================================== */

/* Hero — solid muted band. NO photo yet: per spec, omit rather than use poor
   filler. IMAGERY TODO (2.3): a real factory/lab photo should back this band
   once client-provided or properly licensed — see README "Visual style gap". */
.hero { background-color: var(--color-accent); background-image: var(--tex-hex-dark), var(--grad-hero); color: #fff; border-bottom: 3px solid var(--color-accent-dark); min-height: 70vh; display: flex; align-items: center; }
.hero__inner { max-width: var(--maxw); width: 100%; margin: 0 auto; padding: var(--space-5) var(--space-4); text-align: center; }
.hero__zh { font-family: var(--font-serif); font-size: var(--fs-base); opacity: 0.85; margin-bottom: 2px; }
.hero__title { font-family: var(--font-serif); font-size: var(--fs-xl); color: #fff; margin-bottom: var(--space-3); }
/* Hero carousel — cross-fading slides, small dots. Vanilla JS, no libraries. */
.hero-carousel { max-width: 900px; margin: 0 auto var(--space-3); }
.hero-carousel__dots { justify-content: center; }
.hero-carousel__frame { position: relative; width: 100%; height: clamp(240px, 46vh, 460px); border: 1px solid rgba(255,255,255,0.25); overflow: hidden; background: var(--color-accent-dark); }
.hero-slide { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.8s ease; }
.hero-slide.is-active { opacity: 1; }
.hero-carousel__dots { display: flex; gap: var(--space-2); margin-top: var(--space-2); }
.hero-dot { width: 10px; height: 10px; padding: 0; border: 1px solid rgba(255,255,255,0.6); background: transparent; cursor: pointer; border-radius: 50%; }
.hero-dot.is-active { background: #fff; }
.hero__tagline { font-size: var(--fs-sm); max-width: 720px; margin: 0 auto; opacity: 0.95; }
.hero__meta { margin-top: var(--space-2); font-size: var(--fs-xs); opacity: 0.8; }

/* News ticker strip under hero */
.news-ticker { background: var(--color-bg-alt); border-bottom: 1px solid var(--color-line); font-size: var(--fs-sm); }
.news-ticker__inner { max-width: var(--maxw); margin: 0 auto; padding: var(--space-2) var(--space-4); display: flex; gap: var(--space-3); align-items: baseline; }
.news-ticker__label { font-weight: 700; color: var(--color-accent); white-space: nowrap; }
.news-ticker__text { color: var(--color-ink-soft); }

/* Company intro lede — sits directly under the hero, centered to match it */
.home-intro { text-align: center; padding-top: var(--space-6); padding-bottom: var(--space-2); }
.home-intro p { font-size: var(--fs-md); color: var(--color-ink-soft); line-height: var(--lh-base); }
.home-intro .home-more { margin-top: var(--space-2); }

/* Plain section heading (no right-aligned arrow CTA — that read as SaaS) */
.home-h2 { font-size: var(--fs-xl); border-bottom: 1px solid var(--color-line-strong); padding-bottom: var(--space-2); margin-bottom: var(--space-4); }
.home-more { font-size: var(--fs-sm); margin-top: var(--space-3); }

/* Category list — plain multi-column link list, not a grid of boxes */
.home-cat-list { list-style: none; columns: 3; column-gap: var(--space-6); }
.home-cat-list li { break-inside: avoid; padding: var(--space-1) 0; border-bottom: 1px dotted var(--color-line); }

/* Compliance summary — single labelled list, not 3 parallel columns */
.home-notes { margin: 0; padding-left: var(--space-4); }
.home-notes li { margin-bottom: var(--space-2); line-height: var(--lh-base); }
.home-notes strong { color: var(--color-accent); }

/* Values grid — value word over a photo (dark overlay for legibility) */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.value-card { position: relative; overflow: hidden; border: 1px solid var(--color-line-strong); height: 220px; }
.value-card img { width: 100%; height: 100%; object-fit: cover; display: block; filter: grayscale(15%); }
.value-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,41,77,0.25) 0%, rgba(20,41,77,0.72) 100%); }
.value-card__label { position: absolute; inset: 0; z-index: 2; display: flex; align-items: flex-end; justify-content: center; padding: var(--space-4); color: #fff; font-family: var(--font-serif); font-size: var(--fs-xl); font-weight: 600; letter-spacing: 3px; text-transform: uppercase; text-align: center; }

/* Pending-translation / draft-copy notice banners */
.home-placeholder { border: 1px dashed var(--color-flag); background: var(--color-flag-bg); padding: var(--space-5); margin: var(--space-5) 0; font-size: var(--fs-sm); }

/* --- Fixed side tab: disclaimer / working hours (expands on click) ------- */
.sidetab { position: fixed; right: 0; top: 50%; transform: translateY(-50%); z-index: 60; display: flex; align-items: stretch; }
.sidetab__toggle {
  writing-mode: vertical-rl; text-orientation: upright;
  background-color: var(--color-accent); background-image: var(--tex-hex-dark), var(--grad-accent);
  color: #fff; border: 1px solid var(--color-accent-dark); border-right: 0;
  font-family: var(--font-sans); font-size: var(--fs-sm); font-weight: 700;
  letter-spacing: 2px; padding: var(--space-4) var(--space-1); cursor: pointer;
  line-height: 1.6; align-self: center;
}
.sidetab__toggle:hover { background-color: var(--color-accent-dark); }
.sidetab__panel {
  display: none; width: 250px; max-width: 78vw;
  background: var(--color-bg); border: 1px solid var(--color-line-strong);
  box-shadow: -2px 2px 10px rgba(0,0,0,0.12);
  align-self: center; max-height: 80vh; overflow-y: auto;
}
.sidetab.is-open .sidetab__panel { display: block; }
.sidetab__head { display: flex; align-items: center; justify-content: space-between;
  background-color: var(--color-accent); background-image: var(--tex-hex-dark), var(--grad-accent);
  color: #fff; padding: var(--space-2) var(--space-3); }
.sidetab__head h4 { color: #fff; font-family: var(--font-sans); font-size: var(--fs-base); margin: 0; }
.sidetab__close { background: none; border: 0; color: #fff; font-size: var(--fs-lg); line-height: 1; cursor: pointer; padding: 0 var(--space-1); }
.sidetab__body { padding: var(--space-3) var(--space-4); }
.sidetab__body h5 { font-family: var(--font-sans); font-size: var(--fs-sm); color: var(--color-accent); margin: var(--space-3) 0 var(--space-1); text-transform: uppercase; letter-spacing: 0.5px; }
.sidetab__body h5:first-child { margin-top: 0; }
.sidetab__body p { font-size: var(--fs-sm); color: var(--color-ink-soft); margin: 0 0 var(--space-1); line-height: var(--lh-base); }

/* --- Responsive --------------------------------------------------------- */
@media (max-width: 860px) {
  .product-layout { grid-template-columns: 1fr; }
  .product-sidebar { margin-bottom: var(--space-4); }
  .home-cat-list { columns: 1; }
}
@media (max-width: 720px) {
  .mainnav__row { flex-direction: column; align-items: flex-start; }
  .mainnav__list { gap: var(--space-3); }
  .site-footer__grid { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .detail__specs { grid-template-columns: 1fr; }
  /* Side tab: slimmer on phones so it never crowds the content */
  .sidetab__toggle { font-size: var(--fs-xs); letter-spacing: 1px; padding: var(--space-3) 2px; }
  .sidetab__panel { width: 220px; }
  .values-grid { grid-template-columns: 1fr; }
}