:root {
  --kdh-black: #0a0a0a;
  --kdh-white: #fff;
  --kdh-paper: #f5f5f2;
  --kdh-line: #deded8;
  --kdh-muted: #686868;
  --kdh-max: 1240px;
  --kdh-radius: 2px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--kdh-white); color: var(--kdh-black); font-family: Arial, Helvetica, sans-serif; line-height: 1.55; }
a { color: inherit; }
img { max-width: 100%; height: auto; }
.kdh-shell { width: min(calc(100% - 40px), var(--kdh-max)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--kdh-line); background: rgba(255,255,255,.97); }
.site-header__inner { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.site-brand { font-size: 15px; font-weight: 800; letter-spacing: .12em; text-decoration: none; }
.custom-logo { max-height: 42px; width: auto; }
.primary-nav ul, .site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 24px; }
.primary-nav a { font-size: 13px; font-weight: 700; letter-spacing: .05em; text-decoration: none; text-transform: uppercase; }
.kdh-home-hero { background: var(--kdh-black); color: var(--kdh-white); }
.kdh-home-hero__inner { min-height: 570px; display: grid; align-items: center; max-width: 920px; margin-left: max(20px, calc((100vw - var(--kdh-max))/2)); }
.kdh-home-hero h1, .kdh-page-hero h1 { font-size: clamp(38px, 6vw, 76px); max-width: 1000px; line-height: .98; letter-spacing: -.04em; text-transform: uppercase; margin: 16px 0 24px; }
.kdh-home-hero p { max-width: 720px; font-size: 18px; color: #d7d7d7; }
.kdh-page-hero { padding: 84px 0 56px; border-bottom: 1px solid var(--kdh-line); background: var(--kdh-paper); }
.kdh-page-hero h1 { font-size: clamp(36px, 5vw, 64px); }
.kdh-section { padding: 72px 0; }
.kdh-prose { max-width: 900px; }
.kdh-prose h2 { margin-top: 48px; }
.kdh-eyebrow { font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.kdh-lead { font-size: 19px; max-width: 820px; }
.kdh-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.kdh-button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid var(--kdh-black); background: var(--kdh-black); color: var(--kdh-white); text-decoration: none; text-transform: uppercase; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.kdh-home-hero .kdh-button { border-color: var(--kdh-white); background: var(--kdh-white); color: var(--kdh-black); }
.kdh-button--ghost { background: transparent !important; color: inherit !important; }
.kdh-button--light { background: var(--kdh-white); color: var(--kdh-black); border-color: var(--kdh-white); }
.kdh-filterbar { display: grid; grid-template-columns: minmax(260px,1fr) 220px auto; gap: 10px; margin-bottom: 30px; }
.kdh-filterbar input, .kdh-filterbar select, .kdh-filterbar button { min-height: 48px; border: 1px solid var(--kdh-line); background: white; padding: 0 14px; font: inherit; }
.kdh-filterbar button { background: var(--kdh-black); color: white; border-color: var(--kdh-black); font-weight: 700; cursor: pointer; }
.kdh-product-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1px; background: var(--kdh-line); border: 1px solid var(--kdh-line); }
.kdh-product-card { background: white; min-width: 0; }
.kdh-product-card__image { display: block; aspect-ratio: 4/3; background: var(--kdh-paper); overflow: hidden; }
.kdh-product-card__image img { width: 100%; height: 100%; object-fit: contain; }
.kdh-product-card__body { padding: 24px; }
.kdh-product-card h3 { margin: 8px 0 12px; font-size: 19px; line-height: 1.25; }
.kdh-product-card h3 a, .kdh-text-link { text-decoration: none; }
.kdh-product-card__code { color: var(--kdh-muted); font-size: 13px; }
.kdh-text-link { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; border-bottom: 1px solid; }
.kdh-breadcrumbs { font-size: 13px; color: var(--kdh-muted); margin-bottom: 34px; }
.kdh-breadcrumbs a { text-decoration: none; }
.kdh-product-hero { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 64px; align-items: center; }
.kdh-product-media { min-height: 420px; display: grid; place-items: center; background: var(--kdh-paper); }
.kdh-image-placeholder { color: var(--kdh-muted); }
.kdh-product-hero h1 { font-size: clamp(34px,4vw,58px); line-height: 1.04; letter-spacing: -.03em; }
.kdh-product-ids { margin: 26px 0; border-top: 1px solid var(--kdh-line); }
.kdh-product-ids div { display: grid; grid-template-columns: 220px 1fr; gap: 18px; padding: 11px 0; border-bottom: 1px solid var(--kdh-line); }
.kdh-product-ids dt { color: var(--kdh-muted); }
.kdh-product-ids dd { margin: 0; font-weight: 700; }
.kdh-product-section { margin-top: 72px; }
.kdh-product-section h2 { font-size: 28px; }
.kdh-spec-table { border-top: 1px solid var(--kdh-line); }
.kdh-spec-row { display: grid; grid-template-columns: minmax(220px,.8fr) 1.2fr; gap: 24px; padding: 12px 0; border-bottom: 1px solid var(--kdh-line); }
.kdh-spec-row > div:first-child { color: var(--kdh-muted); }
.kdh-cta { margin-top: 84px; background: var(--kdh-black); color: var(--kdh-white); padding: 44px; display: flex; justify-content: space-between; align-items: end; gap: 30px; }
.kdh-cta h2 { font-size: 34px; margin: 10px 0; }
.kdh-pagination ul { list-style: none; display: flex; gap: 8px; padding: 28px 0 0; }
.kdh-pagination a, .kdh-pagination span { display: grid; place-items: center; min-width: 40px; height: 40px; border: 1px solid var(--kdh-line); text-decoration: none; }
.site-footer { border-top: 1px solid var(--kdh-line); padding: 54px 0; background: var(--kdh-paper); font-size: 14px; }
.site-footer__grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 32px; }
.site-footer ul { flex-direction: column; gap: 7px; }
.site-footer a { text-decoration: none; }
@media (max-width: 900px) {
  .primary-nav { display: none; }
  .kdh-home-hero__inner { margin-inline: auto; width: min(calc(100% - 40px), var(--kdh-max)); }
  .kdh-product-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .kdh-product-hero { grid-template-columns: 1fr; gap: 32px; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .kdh-product-grid, .site-footer__grid { grid-template-columns: 1fr; }
  .kdh-filterbar { grid-template-columns: 1fr; }
  .kdh-product-ids div, .kdh-spec-row { grid-template-columns: 1fr; gap: 4px; }
  .kdh-cta { padding: 28px; align-items: stretch; flex-direction: column; }
  .kdh-home-hero__inner { min-height: 520px; }
}