:root {
  --bg: #ffffff;
  --fg: #14181f;
  --muted: #5a6472;
  --line: #e5e8ec;
  --card: #f6f8fa;
  --brand: #e8471c;        /* 3D Systems industrial orange-red */
  --brand-dark: #b83512;
  --accent: #0b3d63;
  --max: 1180px;
  --radius: 12px;
  font-synthesis: none;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116; --fg: #e8ecf1; --muted: #9aa4b2; --line: #232a34;
    --card: #161b22; --accent: #7fb2dd;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 .5em; }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); margin: 1.8em 0 .5em; }
h3 { font-size: 1.15rem; margin: 1.4em 0 .4em; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 12px; top: 12px; background: var(--fg); color: var(--bg); padding: 8px 12px; z-index: 100; border-radius: 6px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; gap: 20px; min-height: 64px; }
.brand { display: flex; align-items: baseline; gap: 4px; font-weight: 800; font-size: 1.35rem; color: var(--fg); text-decoration: none; }
.brand-mark { color: var(--brand); }
.brand-name { color: var(--fg); font-weight: 500; }
.site-nav { margin-left: auto; }
.nav-groups { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav-group { position: relative; }
.nav-group-label { background: none; border: 0; font: inherit; color: var(--fg); cursor: pointer; padding: 8px 12px; border-radius: 8px; }
.nav-group:hover .nav-group-label, .nav-group-label:focus { background: var(--card); color: var(--brand); }
.nav-sub { position: absolute; top: 100%; left: 0; min-width: 280px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 40px rgba(0,0,0,.14); list-style: none; margin: 6px 0 0; padding: 8px; display: none; }
.nav-group:hover .nav-sub, .nav-group:focus-within .nav-sub { display: block; }
.nav-sub a { display: block; padding: 8px 10px; border-radius: 8px; color: var(--fg); font-size: .95rem; }
.nav-sub a:hover { background: var(--card); color: var(--brand); text-decoration: none; }
.nav-sub [aria-current="page"] a { color: var(--brand); font-weight: 600; }
.header-phone { font-weight: 700; color: var(--fg); white-space: nowrap; }
.nav-toggle { display: none; background: none; border: 0; font-size: 1.5rem; cursor: pointer; color: var(--fg); }

/* Breadcrumbs */
.breadcrumbs { padding: 18px 0 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; color: var(--muted); font-size: .85rem; }
.breadcrumbs li + li::before { content: "›"; margin-right: 8px; color: var(--line); }
.breadcrumbs a { color: var(--muted); }

/* Page */
.page { max-width: 820px; margin: 0 auto; padding: 8px 0 64px; }
.wrap > .page, main > .page { padding-left: 20px; padding-right: 20px; }
.page-head { padding: 12px 0 8px; border-bottom: 3px solid var(--brand); margin-bottom: 24px; display: inline-block; }
.prose > *:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.1em; }
.prose ul, .prose ol { margin: 0 0 1.1em; padding-left: 1.3em; }
.prose li { margin: .3em 0; }
.prose figure { margin: 1.6em 0; }
.prose figure img { border-radius: var(--radius); border: 1px solid var(--line); }
.prose .video video, .prose .video iframe { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: var(--radius); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .95rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.prose blockquote { border-left: 3px solid var(--brand); margin: 1.4em 0; padding: .2em 0 .2em 1em; color: var(--muted); }

/* Placeholder image */
.img-ph { display: flex; align-items: center; justify-content: center; min-height: 140px; background: repeating-linear-gradient(45deg, var(--card), var(--card) 12px, transparent 12px, transparent 24px); border: 1px dashed var(--line); border-radius: var(--radius); color: var(--muted); font-size: .8rem; text-align: center; padding: 16px; }
.img-ph::before { content: "🖼 "; opacity: .5; }

/* Stats & cards */
.stat { display: inline-flex; flex-direction: column; gap: 2px; margin: 0 28px 20px 0; }
.stat-num { font-size: 2.2rem; font-weight: 800; color: var(--brand); line-height: 1; }
.stat-label { color: var(--muted); font-size: .9rem; max-width: 220px; }
.card-grid { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 12px; padding: 0; margin: 1.4em 0; }
.card-grid li { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.card-grid a { font-weight: 600; }

/* Buttons / CTA */
.btn { display: inline-block; background: var(--brand); color: #fff; padding: 11px 20px; border-radius: 999px; font-weight: 600; text-decoration: none; border: 1px solid var(--brand); }
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.cta { margin: 1.6em 0; }

/* Home */
.hero { padding: 72px 0 40px; }
.hero h1 { max-width: 15ch; }
.hero p.lead { font-size: 1.2rem; color: var(--muted); max-width: 60ch; }
.hero .cta { margin-top: 24px; }
.home-sections { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 18px; padding: 20px 0 72px; }
.home-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.home-card h2 { margin-top: 0; font-size: 1.25rem; }
.home-card a { font-weight: 600; }

/* Blog */
.post-list { list-style: none; padding: 0; margin: 24px 0; display: grid; gap: 18px; }
.post-list li { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; background: var(--card); }
.post-list h2 { margin: 0 0 .3em; font-size: 1.25rem; }
.post-meta { color: var(--muted); font-size: .85rem; }
article.post { max-width: 780px; margin: 0 auto; padding: 8px 20px 64px; }

/* Footer */
.site-footer { background: var(--card); border-top: 1px solid var(--line); margin-top: 40px; padding: 48px 0 32px; }
.footer-cta { text-align: center; padding-bottom: 32px; border-bottom: 1px solid var(--line); margin-bottom: 32px; }
.footer-cta h2 { margin-top: 0; }
.footer-contacts { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.footer-nav { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 24px; }
.footer-col h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 10px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin: 6px 0; }
.footer-col a { color: var(--fg); font-size: .92rem; }
.footer-col a:hover { color: var(--brand); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
.footer-bottom a { color: var(--muted); }

@media (max-width: 900px) {
  .nav-toggle { display: block; margin-left: auto; order: 3; }
  .header-phone { order: 2; }
  .site-nav { order: 4; flex-basis: 100%; margin-left: 0; display: none; }
  .site-nav.open { display: block; }
  .nav-groups { flex-direction: column; gap: 0; }
  .nav-group-label { width: 100%; text-align: left; }
  .nav-sub { position: static; display: block; box-shadow: none; border: 0; border-left: 2px solid var(--line); border-radius: 0; margin: 0 0 8px 12px; }
}