:root {
  --bg: #f5f5f5;
  --bg-alt: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --accent: #374151;
  --accent-hover: #111827;
  --max: 1080px;
  --radius: 6px;
  --header-h: 64px;
  --shadow: 0 1px 2px rgba(17, 24, 39, 0.06);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }

.container {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.section { padding: 56px 0; }
.section-muted { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-heading { margin-bottom: 28px; }
.section-heading h2 { margin: 0; font-size: 1.35rem; font-weight: 650; letter-spacing: -0.02em; }

h1, h2, h3, h4 {
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--accent-hover); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-outline:hover { background: var(--bg-alt); border-color: var(--text); }
.btn-secondary { background: var(--bg-alt); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: #eee; }
.btn-sm { min-height: 36px; padding: 6px 12px; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn-lg { min-height: 46px; padding: 10px 18px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  min-width: 0;
}
.logo-icon { width: 36px; height: 36px; border-radius: 8px; }
.logo-text {
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.main-nav { display: flex; align-items: center; gap: 20px; }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; padding: 0; margin: 0; }
.nav-item { position: relative; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius);
}
.nav-link:hover { color: var(--text); background: var(--bg); }
.nav-caret {
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
}
.nav-submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: 6px;
  list-style: none;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.08);
}
.nav-submenu .nav-link { width: 100%; padding: 8px 10px; }
.nav-item:hover > .nav-submenu,
.nav-item:focus-within > .nav-submenu,
.nav-item.is-open > .nav-submenu { display: block; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-actions:empty { display: none; }
.nav-toggle { display: none; border: 0; background: none; width: 40px; height: 40px; padding: 8px; }
.nav-toggle span { display: block; height: 2px; background: var(--text); margin: 5px 0; }

.lang-switcher { position: relative; }
.lang-switcher-toggle {
  min-width: 44px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}
.lang-switcher-list {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  min-width: 160px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.08);
}
.lang-switcher.is-open .lang-switcher-list { display: block; }
.lang-switcher-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 4px;
  font-size: 0.85rem;
}
.lang-switcher-link:hover { background: var(--bg); }
.lang-switcher-link.is-current { font-weight: 650; color: var(--text); }
.lang-switcher-code { color: var(--muted); font-size: 0.75rem; }

.hero {
  padding: 64px 0 48px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 720px; }
.hero-lead { color: var(--muted); font-size: 1.1rem; margin: 0; }

.breadcrumbs { padding: 18px 0 0; font-size: 0.8rem; color: var(--muted); }
.breadcrumbs ol { display: flex; gap: 8px; list-style: none; padding: 0; margin: 0; flex-wrap: wrap; }
.breadcrumbs li + li::before { content: "/"; margin-right: 8px; color: var(--border-strong); }
.breadcrumbs a:hover { color: var(--text); text-decoration: underline; }

.page-content,
.category-page,
.contact-page,
.upload-page,
.catalog-products-page { padding: 32px 0 72px; }

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 48px;
  align-items: start;
}
.page-header { margin-bottom: 28px; }
.page-lead { font-size: 1.05rem; color: var(--muted); max-width: 680px; }
.page-meta { font-size: 0.8rem; color: var(--muted); }

.article-cover { margin: 0 0 28px; overflow: hidden; background: #ececec; border-radius: var(--radius); }
.article-cover img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }

.prose { font-size: 1.05rem; line-height: 1.75; }
.prose > * { max-width: 720px; }
.prose h2 { font-size: 1.35rem; margin: 2em 0 0.6em; }
.prose h3 { font-size: 1.15rem; margin-top: 1.6em; }
.prose p { margin-bottom: 1em; }
.prose ul, .prose ol { padding-left: 1.25em; margin: 0 0 1.25em; }
.prose li { margin: 0.35em 0; }
.prose a:not(.btn) { text-decoration: underline; text-underline-offset: 3px; }
.prose details { border-top: 1px solid var(--border); padding: 12px 0; }
.prose details:last-of-type { border-bottom: 1px solid var(--border); }
.prose summary { font-weight: 650; cursor: pointer; }
.prose details p { font-size: 0.95rem; color: var(--muted); padding-top: 8px; }

.article-intro { font-size: 1.1rem; color: var(--muted); }
.article-check,
.inline-note {
  margin: 28px 0;
  padding: 20px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.article-cta,
.inline-cta {
  margin-top: 32px;
  padding: 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.article-cta p { margin: 0; }

.content-sidebar { position: sticky; top: 88px; }
.sidebar-box {
  padding: 18px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
}
.sidebar-box h4 { font-size: 0.95rem; margin-bottom: 8px; }
.sidebar-box p,
.sidebar-box li,
.sidebar-box a { font-size: 0.875rem; }
.sidebar-box .btn { margin-top: 8px; }
.related-list { list-style: none; padding: 0; margin: 0; }
.related-list li { border-top: 1px solid var(--border); padding: 8px 0; }
.related-list a:hover { text-decoration: underline; }
.spec-list { display: grid; grid-template-columns: 1fr 1fr; margin: 0; }
.spec-list dt,
.spec-list dd { padding: 6px 0; margin: 0; border-bottom: 1px solid var(--border); font-size: 0.8rem; }
.spec-list dd { text-align: right; font-weight: 650; }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 { margin: 0 0 8px; }
.card h3 a:hover { text-decoration: underline; }
.card p { color: var(--muted); font-size: 0.9rem; margin: 0; }
.card-tag {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.category-grid-card { padding: 0; overflow: hidden; }
.category-grid-media { display: block; aspect-ratio: 16/9; overflow: hidden; background: #ececec; }
.category-grid-media img { width: 100%; height: 100%; object-fit: cover; }
.category-grid-placeholder { display: block; width: 100%; height: 100%; background: #ececec; }
.category-grid-body { padding: 18px; }
.category-grid-body p { color: var(--muted); font-size: 0.875rem; }

.category-list { display: grid; gap: 0; border-top: 1px solid var(--border); }
.category-list-item {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.category-list-item h3 { margin: 0 0 4px; }
.category-list-item p { color: var(--muted); font-size: 0.9rem; margin: 0; }
.category-list-meta { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 0.8rem; white-space: nowrap; }
.category-list-link { color: var(--muted); }

.catalog-products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.catalog-product-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.catalog-product-image { display: block; aspect-ratio: 16/10; background: #ececec; }
.catalog-product-image img { width: 100%; height: 100%; object-fit: cover; }
.catalog-product-placeholder { display: block; width: 100%; height: 100%; background: #ececec; }
.catalog-product-body { padding: 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.catalog-product-body h2 { font-size: 1.05rem; }
.catalog-product-body p { color: var(--muted); font-size: 0.875rem; margin: 0; }
.catalog-product-label { font-size: 0.7rem; font-weight: 650; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.catalog-product-specs { display: grid; gap: 4px; margin: 8px 0; }
.catalog-product-specs div { display: flex; justify-content: space-between; font-size: 0.8rem; }
.catalog-product-specs dt { color: var(--muted); }
.catalog-product-specs dd { margin: 0; font-weight: 650; }
.catalog-product-action { margin-top: auto; padding-top: 8px; }

.page-cta-inline { margin-top: 40px; }

.lead-form-wrap {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.lead-form-wrap h3 { font-size: 1.15rem; }
.form-subtitle { color: var(--muted); font-size: 0.875rem; }
.lead-form { display: grid; gap: 12px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-group { display: grid; gap: 4px; }
.form-group label { font-size: 0.8rem; font-weight: 600; }
.form-group small { color: var(--muted); font-size: 0.75rem; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--border-strong);
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: var(--text);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.hp-field { position: absolute !important; left: -9999px !important; }
.form-feedback { font-size: 0.85rem; }
.form-feedback.success { color: #166534; }
.form-feedback.error { color: #b91c1c; }

.contact-grid,
.upload-grid {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 400px);
  gap: 48px;
  align-items: start;
}
.contact-info { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 24px; }
.contact-item {
  padding: 16px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: grid;
  gap: 4px;
}
.contact-item strong { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.contact-copy { margin-bottom: 28px; }
.steps-list { padding-left: 1.25em; margin: 0 0 24px; }
.steps-list li { margin: 8px 0; }
.check-list { padding: 0; list-style: none; }
.check-list li { margin: 8px 0; padding-left: 20px; position: relative; }
.check-list li::before { content: "•"; position: absolute; left: 0; color: var(--muted); }

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  color: var(--text);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0;
}
.footer-brand p { color: var(--muted); font-size: 0.875rem; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-logo strong { font-size: 0.95rem; }
.footer-grid h4 { font-size: 0.85rem; margin-bottom: 10px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin: 6px 0; }
.footer-grid a { color: var(--muted); font-size: 0.875rem; }
.footer-grid a:hover { color: var(--text); }
.footer-contact { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 0;
  color: var(--muted);
  font-size: 0.8rem;
}
.footer-bottom p { margin: 0; }

.pagination { display: flex; gap: 6px; margin-top: 32px; flex-wrap: wrap; }
.pagination a,
.pagination span {
  padding: 6px 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
}
.pagination a.active,
.pagination a[aria-current="page"] { background: var(--accent); color: #fff; border-color: var(--accent); }

.alert { padding: 12px 14px; margin: 16px 0; border-radius: var(--radius); }
.alert-success { background: #ecfdf5; color: #166534; }
.empty-state {
  padding: 32px;
  background: var(--bg-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
}
.preview-banner { background: #e5e7eb; color: var(--text); padding: 8px; text-align: center; font-size: 0.8rem; }

.error-page,
.maintenance-page {
  min-height: 50vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 80px 20px;
}
.error-page-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 1100px) {
  .main-nav {
    position: fixed;
    display: none;
    top: var(--header-h);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-h));
    overflow: auto;
    background: var(--bg-alt);
    padding: 16px 20px 24px;
    border-bottom: 1px solid var(--border);
  }
  .main-nav.open { display: block; }
  .nav-toggle { display: block; }
  .nav-links { display: block; }
  .nav-link { width: 100%; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-submenu { position: static; box-shadow: none; border: 0; background: transparent; padding: 0 0 8px 16px; }
  .nav-actions { margin-top: 14px; }
}

@media (max-width: 960px) {
  .content-grid { grid-template-columns: 1fr; }
  .content-sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cards-grid,
  .category-grid,
  .catalog-products-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, var(--max)); }
  .section { padding: 40px 0; }
  .hero { padding: 40px 0 32px; }
  .logo-text { max-width: 160px; }
  .cards-grid,
  .category-grid,
  .catalog-products-grid { grid-template-columns: 1fr; }
  .contact-grid,
  .upload-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 36px 0; }
  .contact-info { grid-template-columns: 1fr; }
  .category-list-item { flex-direction: column; gap: 8px; }
  .article-cta { display: block; }
  .article-cta .btn { margin-top: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}