/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; overflow-x: hidden; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === TOKENS === */
:root {
  --bg:          #f0f2f5;
  --surface:     #ffffff;
  --surface-alt: #e8ebef;
  --border:      #d0d5dd;
  --accent:      #1a56db;
  --accent-dim:  #dbeafe;
  --text:        #111827;
  --muted:       #6b7280;
  --green:       #16a34a;
  --red:         #dc2626;
  --font-display: 'Roboto Condensed', sans-serif;
  --font-body:    'Inter', sans-serif;
  --radius:      8px;
  --max-w:       760px;
  --sidebar-w:   280px;
  --gap:         24px;
}

/* === LAYOUT === */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* Двухколоночная обёртка — шире стандартного container */
.page-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--gap);
  width: 100%;
  min-width: 0;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-main {
  flex: 1;
  min-width: 0;
}

.sidebar {
  flex-shrink: 0;
  width: var(--sidebar-w);
}

.sidebar-inner {
  position: sticky;
  top: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (max-width: 900px) {
  .page-wrap { flex-direction: column; align-items: stretch; }
  .page-main { width: 100%; max-width: 100%; }
  .page-content { max-width: 100%; }
  .legal-content { max-width: 100%; }
  /* сайдбар не растягивается — остаётся шириной как на десктопе */
  .sidebar { width: var(--sidebar-w); align-self: center; }
  .sidebar-inner { position: static; }
}

/* === BANNER === */
.site-banner {
  width: 100%;
  overflow: hidden;
  line-height: 0;
}
.site-banner-img {
  width: 100%;
  height: clamp(150px, 20vw, 200px);
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

/* === HEADER === */
.site-header {
  background: #1e293b;
  border-bottom: 3px solid var(--accent);
  padding: 14px 0;
  margin-bottom: 28px;
}

/* === BREADCRUMBS === */
.breadcrumbs { margin-bottom: 20px; }
.breadcrumbs ol {
  display: flex;
  flex-wrap: nowrap;
  overflow: hidden;
  gap: 6px;
  list-style: none;
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
}
.breadcrumbs ol li::after { content: '›'; margin-left: 6px; }
.breadcrumbs ol li:last-child::after { content: ''; }
.breadcrumbs ol li a { color: var(--muted); }
.breadcrumbs ol li a:hover { color: var(--accent); text-decoration: none; }
.breadcrumbs ol li[aria-current="page"] { color: var(--text); }

/* === PAGE TITLE === */
.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

/* === OIL TABLE === */
.oil-section { margin-bottom: 36px; }
.oil-section h2 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.oil-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}
.oil-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  font-size: 0.88rem;
}
.oil-table th {
  background: #1e293b;
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 10px 14px;
  text-align: left;
  white-space: nowrap;
}
.oil-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--text);
}
.oil-table tr:last-child td { border-bottom: none; }
.oil-table tr:nth-child(even) td { background: var(--surface-alt); }
.oil-table tr:hover td { background: var(--accent-dim); }

/* Капсула вязкости */
.viscosity-badge {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border: 1px solid #bfdbfe;
}

/* === FAQ === */
.faq-section { margin-bottom: 36px; max-width: 100%; overflow: hidden; }
.faq-section h2 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 6px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  max-width: 100%;
  box-sizing: border-box;
}
.faq-item summary {
  cursor: pointer;
  padding: 13px 16px;
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  user-select: none;
  word-break: break-word;
  overflow-wrap: anywhere;
  min-width: 0;
  box-sizing: border-box;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 400;
  flex-shrink: 0;
}
.faq-item[open] summary {
  border-bottom: 1px solid var(--border);
  background: var(--surface-alt);
}
.faq-item[open] summary::after { content: '−'; }
.faq-item summary:hover { background: var(--accent-dim); }
.faq-answer {
  padding: 12px 16px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
  word-break: break-word;
  overflow-wrap: anywhere;
  max-width: 100%;
  box-sizing: border-box;
}

/* === RELATED === */
.related-section { margin-bottom: 36px; }
.related-section h2 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  transition: border-color 0.15s, box-shadow 0.15s;
  display: block;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.related-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(26,86,219,0.12);
  text-decoration: none;
}

/* === HOMEPAGE === */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.hub-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: block;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.hub-card:hover {
  border-color: var(--accent);
  box-shadow: 0 3px 10px rgba(26,86,219,0.1);
  text-decoration: none;
}
.hub-card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.hub-card-vol {
  font-size: 0.75rem;
  color: var(--muted);
}

/* === FOOTER === */
.site-footer {
  background: #1e293b;
  border-top: 1px solid #334155;
  padding: 20px 0;
  margin-top: 48px;
  font-size: 0.78rem;
  color: #64748b;
  text-align: center;
}

/* === RESPONSIVE === */

/* Планшет / узкий десктоп (≤ 900px) — уже объявлен выше в layout */

/* Средний мобильный (≤ 600px) */
@media (max-width: 600px) {
  /* Layout */
  .page-wrap { padding: 0 12px; gap: 16px; }
  .container  { padding: 0 12px; }

  /* Header */
  .site-header { padding: 10px 0; margin-bottom: 16px; }
  .site-logo   { font-size: 1rem; }

  /* Page title */
  .page-title  { font-size: clamp(1.4rem, 6vw, 1.9rem); margin-bottom: 18px; }

  /* Breadcrumbs — разрешаем перенос */
  .breadcrumbs ol {
    flex-wrap: wrap;
    white-space: normal;
    overflow: visible;
  }
  .breadcrumbs { margin-bottom: 12px; }

  /* Oil table */
  .oil-table th,
  .oil-table td  { padding: 8px 10px; font-size: 0.8rem; }
  .oil-table-wrap {
    /* убеждаемся, что скролл включён и не обрезается */
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
  }

  /* FAQ */
  .faq-item summary { padding: 11px 13px; font-size: 0.88rem; }
  .faq-answer        { padding: 10px 13px; }

  /* Related */
  .related-grid  { grid-template-columns: 1fr 1fr; }

  /* Hub / brand / model grids */
  .hub-grid      { grid-template-columns: 1fr; }
  .model-grid    { grid-template-columns: 1fr; }
  .brand-grid    { gap: 6px; }
  .brand-card    { font-size: 0.82rem; padding: 6px 10px; }

  /* Page content */
  .page-content  { max-width: 100%; font-size: 0.9rem; }
  .legal-content { max-width: 100%; }

  /* Sidebar banner — компактнее */
  .market-banner-img { max-height: 160px; object-fit: cover; }

  /* Tag pills */
  .tag-nav { gap: 6px; }
  .tag-pill { font-size: 0.8rem; padding: 4px 11px; }

  /* Footer */
  .site-footer { margin-top: 28px; }
  .footer-nav  { gap: 4px 14px; }
}

/* Маленький телефон (≤ 380px) */
@media (max-width: 380px) {
  .page-wrap { padding: 0 8px; }
  .container  { padding: 0 8px; }
  .page-title { font-size: 1.35rem; }
  .related-grid  { grid-template-columns: 1fr; }
  .oil-table th,
  .oil-table td  { padding: 7px 8px; font-size: 0.76rem; }
}

/* === HEADER LAYOUT === */
.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-logo {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  text-decoration: none;
  letter-spacing: 0.04em;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-logo:hover { color: #93c5fd; text-decoration: none; }

/* === DESKTOP NAV === */
.main-nav { flex: 1; }
.nav-list {
  display: flex;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-item { position: relative; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  color: #cbd5e1;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 6px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover {
  background: rgba(255,255,255,0.08);
  color: #ffffff;
  text-decoration: none;
}
.nav-arrow {
  font-size: 0.65rem;
  opacity: 0.6;
  margin-top: 1px;
}

/* Дропдаун */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 210px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  list-style: none;
  padding: 6px 0;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
  z-index: 100;
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown-link {
  display: block;
  padding: 8px 16px;
  color: var(--text);
  font-size: 0.86rem;
  text-decoration: none;
  transition: background 0.1s, color 0.1s;
}
.nav-dropdown-link:hover {
  background: var(--accent-dim);
  color: var(--accent);
  text-decoration: none;
}
.nav-dropdown li:last-child .nav-dropdown-link {
  border-top: 1px solid var(--border);
  margin-top: 4px;
  padding-top: 10px;
  color: var(--accent);
  font-weight: 500;
}

/* === NESTED SUBDROPDOWN === */
.nav-subitem { position: relative; }
.nav-subitem > .nav-dropdown-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-sub-arrow {
  font-size: 0.9rem;
  opacity: 0.5;
  margin-left: 8px;
}
.nav-subdropdown {
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 190px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  list-style: none;
  padding: 6px 0;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-4px);
  transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
  z-index: 101;
}
.nav-subitem:hover .nav-subdropdown,
.nav-subitem:focus-within .nav-subdropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}
.nav-subdropdown .nav-dropdown-link { border-top: none; margin-top: 0; }

/* === MOBILE BURGER === */
.mobile-menu { display: none; margin-left: auto; }
.burger {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.burger::-webkit-details-marker { display: none; }
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
}
.mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #1e293b;
  border-top: 1px solid #334155;
  padding: 12px 0 20px;
  z-index: 200;
  max-height: 80vh;
  overflow-y: auto;
}
.mobile-section {
  padding: 0 20px;
  margin-bottom: 12px;
}
.mobile-section-title {
  display: block;
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 8px 0 4px;
  text-decoration: none;
  border-bottom: 1px solid #334155;
  margin-bottom: 4px;
}
.mobile-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mobile-link {
  display: block;
  padding: 6px 0;
  color: #94a3b8;
  font-size: 0.85rem;
  text-decoration: none;
}
.mobile-link:hover { color: #ffffff; text-decoration: none; }

/* === RESPONSIVE NAV === */
@media (max-width: 700px) {
  .main-nav { display: none; }
  .mobile-menu { display: block; }
  .site-header { position: relative; }
}

/* === PAGE CONTENT === */
.page-content {
  max-width: 720px;
  margin-bottom: 36px;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text);
  /* не overflow-hidden — иначе таблицы внутри не прокрутить */
  overflow-x: visible;
}
.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 10px;
}
.page-content h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 8px;
}
.page-content p { margin-bottom: 14px; }
.page-content ul {
  padding-left: 20px;
  margin-bottom: 14px;
}
.page-content ul li {
  margin-bottom: 6px;
  line-height: 1.65;
}
.page-content strong { color: var(--text); font-weight: 600; }

/* Таблицы внутри HTML-контента (set:html) — горизонтальный скролл */
.page-content table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
}
.page-content table th,
.page-content table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  white-space: nowrap;
}
.page-content table th {
  background: #1e293b;
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
/* Оборачиваем таблицу в scroll-контейнер через CSS — работает автоматически */
.page-content :where(table) {
  display: block;
  overflow-x: auto;
  max-width: 100%;
  white-space: nowrap;
}

/* === LEGAL PAGES === */
.legal-content {
  max-width: 720px;
  margin-bottom: 48px;
}
.legal-content h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 10px;
}
.legal-content p {
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 12px;
}
.legal-content ul {
  padding-left: 20px;
  margin-bottom: 12px;
}
.legal-content ul li {
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 4px;
}
.legal-content a { color: var(--accent); }
.legal-date {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 32px;
}

/* === FOOTER NAV === */
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  justify-content: center;
  margin-bottom: 12px;
}
.footer-link {
  color: #64748b;
  font-size: 0.8rem;
  text-decoration: none;
  white-space: nowrap;
}
.footer-link:hover { color: #94a3b8; text-decoration: underline; }
.footer-copy {
  color: #475569;
  font-size: 0.75rem;
  text-align: center;
}

/* === AUTHOR BLOCK === */
.author-block {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 360px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.author-photo {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--border);
}
.author-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.author-desc {
  font-size: 0.82rem;
  color: var(--muted);
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* === INDEX PAGE === */
.index-lead {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 36px;
}

.index-section {
  margin-bottom: 36px;
}

.index-section-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.brand-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.brand-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.brand-card:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
@media (max-width: 480px) {
  .model-grid { grid-template-columns: 1fr; }
}
.model-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.model-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(26,86,219,0.1);
  text-decoration: none;
}

.index-seo-text {
  max-width: 720px;
  margin-bottom: 48px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.index-seo-text h2 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 24px 0 8px;
}
.index-seo-text p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 12px;
}

/* === TAG NAV === */
.tag-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.tag-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.tag-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}