:root {
  --color-bg: #070b0f;
  --color-bg-2: #0b1117;
  --color-surface: rgba(17, 24, 32, .92);
  --color-surface-2: rgba(23, 33, 43, .88);
  --color-text: #f3f6f8;
  --color-muted: #aeb8c2;
  --color-border: rgba(255,255,255,.13);
  --color-border-strong: rgba(255,255,255,.22);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow: 0 18px 50px rgba(0,0,0,.32);
  --container: 1180px;
}
.theme-amber { --color-accent: #f59e0b; --color-accent-rgb: 245,158,11; --color-accent-soft: rgba(245,158,11,.16); --color-accent-strong: #ff9f1a; }
.theme-silver { --color-accent: #d9e2ea; --color-accent-rgb: 217,226,234; --color-accent-soft: rgba(217,226,234,.14); --color-accent-strong: #eef5fa; }
.theme-red { --color-accent: #b91c1c; --color-accent-rgb: 185,28,28; --color-accent-soft: rgba(185,28,28,.18); --color-accent-strong: #ef4444; }
.theme-copper { --color-accent: #b87333; --color-accent-rgb: 184,115,51; --color-accent-soft: rgba(184,115,51,.18); --color-accent-strong: #d7924d; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 0%, rgba(var(--color-accent-rgb),.10), transparent 32rem),
    linear-gradient(180deg, #05080b 0%, var(--color-bg) 44%, #05080b 100%);
  color: var(--color-text);
  line-height: 1.6;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(100% - 32px, var(--container)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 11, 15, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.site-logo { flex: 0 0 auto; display: inline-flex; align-items: center; text-decoration: none; }
.site-logo__image { width: 180px; height: auto; }

.main-menu { margin-left: auto; }
.main-menu__list { display: flex; align-items: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.main-menu__item { position: relative; display: flex; align-items: center; }
.main-menu__link {
  color: var(--color-muted);
  font-size: 15px;
  padding: 10px 12px;
  border-radius: 999px;
}
.main-menu__link.is-active, .main-menu__link:hover {
  color: var(--color-text);
  background: rgba(255,255,255,.04);
  text-decoration: none;
}
.dropdown-toggle {
  width: 28px;
  height: 28px;
  margin-left: -8px;
  border: 0;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
}
.dropdown-toggle::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}
.main-menu__item.has-dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 14px;
}
.main-menu__dropdown {
  position: absolute;
  left: 0;
  top: calc(100% + 10px);
  width: min(320px, 80vw);
  margin: 0;
  padding: 10px;
  list-style: none;
  background: rgba(13, 19, 26, .98);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: .16s ease;
  z-index: 90;
}
.has-dropdown:hover .main-menu__dropdown,
.has-dropdown:focus-within .main-menu__dropdown,
.has-dropdown.is-open .main-menu__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.main-menu__dropdown a {
  display: block;
  color: var(--color-muted);
  padding: 9px 10px;
  border-radius: 10px;
  font-size: 14px;
}
.main-menu__dropdown a:hover,
.main-menu__dropdown a.is-active {
  color: var(--color-text);
  background: var(--color-accent-soft);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 8px 14px;
  cursor: pointer;
}
.site-main { padding: 34px 0 70px; }
.breadcrumbs { margin-bottom: 28px; color: var(--color-muted); font-size: 14px; }
.breadcrumbs__list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.breadcrumbs__item:not(:last-child)::after { content: "/"; margin-left: 8px; color: var(--color-border-strong); }

.page-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 42%);
  gap: 42px;
  align-items: center;
  margin-bottom: 38px;
  padding: 34px;
  background: linear-gradient(135deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.page-intro__content { max-width: 760px; }
.page-intro h1 { margin: 0 0 18px; font-size: clamp(34px, 4.6vw, 56px); line-height: 1.08; letter-spacing: -.03em; }
.page-intro p { margin: 0; color: var(--color-muted); font-size: 18px; }
.page-intro__media { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); background: var(--color-surface); }
.page-image { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }

.page-body {
  max-width: 980px;
  margin: 44px auto 0;
  padding: 34px;
  background: rgba(8, 12, 17, .7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.page-body h2 { margin: 0 0 16px; font-size: clamp(24px, 3vw, 34px); line-height: 1.18; }
.page-body h2:not(:first-child) { margin-top: 34px; }
.page-body p { margin: 0 0 18px; color: #d8dee5; }
.page-body p:last-child { margin-bottom: 0; }
.page-body strong { color: var(--color-text); }

.section-heading { margin: 0 0 22px; text-align: center; }
.section-heading--left { text-align: left; }
.section-heading h2 {
  display: inline-block;
  margin: 0;
  font-size: clamp(24px, 3.3vw, 36px);
  line-height: 1.15;
}
.section-heading h2::after {
  content: "";
  display: block;
  width: 52px;
  height: 3px;
  margin: 12px auto 0;
  border-radius: 99px;
  background: var(--color-accent);
}
.section-heading--left h2::after { margin-left: 0; }

.child-cards { margin: 34px 0 48px; }
.child-cards__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.child-card,
.home-card {
  overflow: hidden;
  background: linear-gradient(180deg, rgba(17,24,32,.96), rgba(10,15,20,.96));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 34px rgba(0,0,0,.18);
}
.child-card__media,
.home-card__media { display: block; overflow: hidden; background: #101820; }
.child-card__media img,
.home-card__media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .25s ease; }
.child-card:hover img,
.home-card:hover img { transform: scale(1.035); }
.child-card__content,
.home-card__content { padding: 18px; }
.child-card__title,
.home-card h3 { margin: 0 0 10px; font-size: 19px; line-height: 1.22; }
.child-card__title a,
.home-card h3 a { color: var(--color-text); }
.child-card__text,
.home-card p { margin: 0 0 14px; color: var(--color-muted); font-size: 14px; }
.card-link { font-weight: 650; font-size: 14px; }

.home-hero {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: stretch;
  min-height: 520px;
  margin-bottom: 26px;
  border: 0;
  border-radius: var(--radius-lg);
  background: #0b1117;
}
.home-hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(6, 9, 13, .84) 0%, rgba(6, 9, 13, .64) 34%, rgba(6, 9, 13, .30) 58%, rgba(6, 9, 13, .06) 100%),
    linear-gradient(180deg, rgba(6, 9, 13, .08) 0%, rgba(6, 9, 13, .26) 100%),
    var(--hero-bg-image);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  transform: scale(1.02);
}
.home-hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: min(100%, 720px);
  min-height: 520px;
  padding: clamp(34px, 6vw, 72px);
  background: linear-gradient(135deg, rgba(14, 20, 27, .70), rgba(14,20,27,.20));
  backdrop-filter: blur(1px);
}
.home-hero h1 { margin: 0 0 20px; font-size: clamp(40px, 6vw, 68px); line-height: 1.03; letter-spacing: -.04em; }
.home-hero p { max-width: 640px; margin: 0; color: #d5dbe2; font-size: 18px; }
.home-hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-accent); color: #121212; }
.btn-outline { border: 1px solid var(--color-border-strong); color: var(--color-text); background: rgba(255,255,255,.04); }
.home-hero__media {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.home-hero__media img { width: 100%; height: 100%; object-fit: cover; min-height: 430px; }

.home-section { margin-top: 42px; }
.home-directions__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.home-card--wide {
  display: grid;
  grid-template-columns: 48% 1fr;
  min-height: 240px;
}
.home-card--wide .home-card__media img { height: 100%; aspect-ratio: auto; }
.home-popular__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.home-card--feature { grid-column: span 2; grid-row: span 2; }
.home-card--feature .home-card__media img { aspect-ratio: 16 / 10; }
.home-usage__grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 18px;
}
.home-usage__grid .home-card { grid-column: span 2; }
.home-usage__grid .home-card:nth-child(4),
.home-usage__grid .home-card:nth-child(5) { grid-column: span 3; }
.home-extra__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.home-card--horizontal {
  display: grid;
  grid-template-columns: 40% 1fr;
}
.home-card--horizontal .home-card__media img { height: 100%; aspect-ratio: auto; }

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: rgba(255,255,255,.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.benefits-grid div {
  padding: 22px;
  border-right: 1px solid var(--color-border);
}
.benefits-grid div:last-child { border-right: 0; }
.benefits-grid strong { display: block; margin-bottom: 7px; color: var(--color-text); }
.benefits-grid span { color: var(--color-muted); font-size: 14px; }

/* Accent markers for the trust block */
.benefits-grid div {
  position: relative;
  padding-left: 58px;
}

.benefits-grid div::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 24px;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-accent);
  border-radius: 8px;
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}

.benefits-grid div::after {
  content: "";
  position: absolute;
  left: 29px;
  top: 30px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(45deg);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: rgba(4,7,10,.96);
  padding: 42px 0 24px;
}
.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(240px, 300px) 1fr;
  gap: 38px;
}
.site-footer__brand p { max-width: 420px; color: var(--color-muted); font-size: 14px; }
.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
}
.site-footer__nav strong { display: block; margin-bottom: 12px; }
.site-footer__nav a { display: block; color: var(--color-muted); margin-bottom: 9px; font-size: 14px; line-height: 1.35; }
.site-footer__bottom {
  grid-column: 1 / -1;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 14px;
}


@media (max-width: 1120px) {
  .main-menu__item.has-dropdown::after, .language-menu::after { display: none; }
  .site-header__inner { flex-wrap: wrap; padding: 12px 0; }
  .menu-toggle { display: inline-flex; margin-left: auto; }
  .main-menu { display: none; order: 10; width: 100%; margin-left: 0; }
  .main-menu.is-open { display: block; }
  .main-menu__list { display: block; }
  .main-menu__item { display: block; }
  .main-menu__link { display: inline-block; width: calc(100% - 40px); }
  .dropdown-toggle { float: right; margin-top: 4px; }
  .main-menu__dropdown {
    position: static;
    display: none;
    width: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin: 4px 0 10px;
    box-shadow: none;
  }
  .has-dropdown.is-open .main-menu__dropdown { display: block; }
}

@media (max-width: 1040px) {
  .main-menu__item.has-dropdown::after, .language-menu::after { display: none; }
  .site-header__inner { flex-wrap: wrap; padding: 12px 0; }
  .menu-toggle { display: inline-flex; margin-left: auto; }
  .main-menu { display: none; order: 10; width: 100%; margin-left: 0; }
  .main-menu.is-open { display: block; }
  .main-menu__list { display: block; }
  .main-menu__item { display: block; }
  .main-menu__link { display: inline-block; width: calc(100% - 40px); }
  .dropdown-toggle { float: right; margin-top: 4px; }
  .main-menu__dropdown {
    position: static;
    display: none;
    width: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin: 4px 0 10px;
    box-shadow: none;
  }
  .has-dropdown.is-open .main-menu__dropdown { display: block; }
   .page-intro { grid-template-columns: 1fr; }
  .home-hero { min-height: 460px; }
  .home-hero__content { width: min(100%, 640px); min-height: 460px; }
  .home-hero__bg { background-position: 64% center; }
  .child-cards__grid, .home-popular__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .home-directions__grid, .home-extra__grid { grid-template-columns: 1fr; }
  .home-usage__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .home-usage__grid .home-card,
  .home-usage__grid .home-card:nth-child(4),
  .home-usage__grid .home-card:nth-child(5) { grid-column: span 1; }
  .benefits-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .benefits-grid div:nth-child(2) { border-right: 0; }
  .site-footer__inner, .site-footer__nav { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 24px, var(--container)); }
  .site-logo__image { width: 148px; }
  .language-menu { margin-left: 0; }
  .page-intro, .page-body { padding: 24px; }
  .home-hero { min-height: 420px; }
  .home-hero__content { width: 100%; min-height: 420px; padding: 24px; background: linear-gradient(180deg, rgba(14, 20, 27, .82), rgba(14,20,27,.52)); }
  .home-hero__bg { background-position: 70% center; }
  .home-card--wide, .home-card--horizontal { grid-template-columns: 1fr; }
  .child-cards__grid, .home-popular__grid, .home-usage__grid, .benefits-grid { grid-template-columns: 1fr; }
  .home-card--feature { grid-column: auto; grid-row: auto; }
  .benefits-grid div { border-right: 0; border-bottom: 1px solid var(--color-border); padding-left: 58px; }
  .benefits-grid div:last-child { border-bottom: 0; }
}


/* Calm links inside main text */
.page-body a {
  color: inherit;
  font-weight: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-body a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* Language dropdown, same interaction idea as second-level menu */
.language-menu {
  position: relative;
  flex: 0 0 auto;
}

.language-menu__current {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  color: var(--color-text);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.language-menu__current::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: .8;
}

.language-menu::after {
  content: "";
  position: absolute;
  right: 0;
  top: 100%;
  width: 100%;
  min-width: 92px;
  height: 14px;
}
.language-menu__dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 76px;
  margin: 0;
  padding: 8px;
  list-style: none;
  background: rgba(13, 19, 26, .98);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: .16s ease;
  z-index: 80;
}

.language-menu:hover .language-menu__dropdown,
.language-menu:focus-within .language-menu__dropdown,
.language-menu.is-open .language-menu__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-menu__dropdown a {
  display: block;
  color: var(--color-muted);
  padding: 8px 10px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.language-menu__dropdown a:hover {
  color: var(--color-text);
  background: var(--color-accent-soft);
  text-decoration: none;
}

/* Satellite 2: expert monochrome style */
.theme-silver .home-card,
.theme-silver .child-card,
.theme-silver .page-intro,
.theme-silver .page-body {
  background: linear-gradient(180deg, rgba(15, 20, 26, .96), rgba(7, 10, 14, .96));
}
.theme-silver .home-hero__bg { filter: grayscale(1) contrast(1.14) brightness(.92); }
.theme-silver .section-heading h2::after {
  width: 78px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}
.theme-silver .home-card__content,
.theme-silver .child-card__content { border-top: 1px solid rgba(255,255,255,.07); }
.theme-silver .btn-primary { color: #081016; box-shadow: 0 0 0 1px rgba(255,255,255,.16) inset; }
.theme-silver .page-body h2 { color: #eef3f7; }
.theme-silver .home-card__media img,
.theme-silver .child-card__media img,
.theme-silver .page-intro__media img { filter: grayscale(1) contrast(1.08); }

/* v2 rebuild: information-site composition, not a commercial landing clone */
.theme-silver {
  --color-bg: #071016;
  --color-bg-2: #0c151d;
  --color-surface: rgba(12, 18, 25, .94);
  --color-surface-2: rgba(18, 28, 37, .90);
  --color-text: #dfe7ed;
  --color-muted: #9aa8b2;
  --color-border: rgba(177, 194, 207, .18);
  --color-border-strong: rgba(205, 218, 228, .34);
  --color-accent: #b7c4ce;
  --color-accent-rgb: 183, 196, 206;
  --color-accent-soft: rgba(183, 196, 206, .14);
  --color-accent-strong: #edf3f7;
}

.theme-silver body,
body.theme-silver {
  background:
    radial-gradient(circle at 82% 0%, rgba(139, 163, 181, .16), transparent 30rem),
    radial-gradient(circle at 12% 18%, rgba(55, 76, 92, .26), transparent 22rem),
    linear-gradient(180deg, #04080c 0%, #081016 44%, #05090d 100%);
}

.site-header__inner { gap: 16px; }
.site-logo__image { width: 156px; }
.main-menu__list { gap: 2px; }
.main-menu__link {
  font-size: 14px;
  padding: 8px 9px;
  white-space: nowrap;
}
.dropdown-toggle { width: 24px; height: 24px; margin-left: -7px; }
.language-menu__current { min-height: 32px; padding: 7px 10px; }

.theme-silver .site-header {
  background: rgba(5, 10, 15, .92);
  border-bottom-color: rgba(202, 216, 227, .16);
}
.theme-silver .main-menu__link.is-active,
.theme-silver .main-menu__link:hover {
  background: linear-gradient(180deg, rgba(183,196,206,.16), rgba(183,196,206,.06));
  box-shadow: inset 0 0 0 1px rgba(207, 219, 228, .12);
}
.theme-silver .main-menu__dropdown,
.theme-silver .language-menu__dropdown {
  background: rgba(8, 14, 20, .98);
  border-color: rgba(202, 216, 227, .22);
}

.info-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 28px;
  min-height: 430px;
  margin: 8px 0 54px;
  padding: clamp(28px, 4vw, 52px);
  border: 1px solid var(--color-border-strong);
  border-radius: 30px;
  background:
    linear-gradient(115deg, rgba(8, 14, 20, .95) 0%, rgba(10, 17, 23, .86) 48%, rgba(8,14,20,.62) 100%),
    var(--hero-bg-image) center / cover no-repeat;
  box-shadow: 0 24px 80px rgba(0,0,0,.36);
}
.info-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: .34;
  pointer-events: none;
}
.info-hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 82% 28%, rgba(220,229,236,.20), transparent 18rem);
  pointer-events: none;
}
.info-hero__content,
.info-hero__route { position: relative; z-index: 1; }
.info-hero__content { align-self: center; max-width: 760px; }
.info-hero__kicker,
.section-kicker,
.page-intro__type {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--color-accent-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.info-hero__kicker::before,
.section-kicker::before,
.page-intro__type::before {
  content: "";
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent-strong), transparent);
}
.info-hero h1 {
  margin: 0 0 18px;
  max-width: 740px;
  font-size: clamp(36px, 5.2vw, 66px);
  line-height: 1.02;
  letter-spacing: -.045em;
}
.info-hero p {
  max-width: 680px;
  margin: 0;
  color: #b9c4cc;
  font-size: 18px;
}
.info-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.btn-primary {
  color: #071016;
  background: linear-gradient(135deg, #f2f6f8, #aab7c1 52%, #e7edf1);
  border-color: rgba(255,255,255,.26);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.42), 0 16px 34px rgba(0,0,0,.28);
}
.btn-primary:hover { filter: brightness(1.08); text-decoration: none; }
.btn-outline {
  color: var(--color-text);
  border-color: rgba(213, 225, 234, .32);
  background: rgba(9,15,21,.36);
}
.info-hero__route {
  align-self: end;
  padding: 20px;
  border: 1px solid rgba(220,230,238,.22);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(10, 16, 22, .78), rgba(10,16,22,.52));
  backdrop-filter: blur(8px);
}
.info-hero__route strong {
  display: block;
  margin-bottom: 12px;
  color: var(--color-accent-strong);
}
.info-hero__route a {
  display: block;
  padding: 10px 0;
  color: #c5d0d8;
  border-top: 1px solid rgba(255,255,255,.10);
  text-decoration: none;
}
.info-hero__route a:hover { color: #fff; }

.home-definition,
.home-guide,
.home-structure,
.home-types-map,
.home-compare-use,
.home-questions {
  margin-bottom: 46px;
}
.home-definition {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  gap: 28px;
  align-items: stretch;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(182,198,210,.09), rgba(12,18,24,.88));
}
.home-definition__main h2,
.compare-panel h2,
.use-panel h2,
.home-questions h2 {
  margin: 0 0 14px;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.12;
  letter-spacing: -.025em;
}
.home-definition__main p,
.compare-panel p {
  margin: 0;
  color: var(--color-muted);
  font-size: 17px;
}
.definition-facts {
  margin: 0;
  display: grid;
  gap: 1px;
  border: 1px solid rgba(211,224,234,.18);
  border-radius: 20px;
  overflow: hidden;
  background: rgba(255,255,255,.08);
}
.definition-facts div {
  padding: 16px 18px;
  background: rgba(8,13,18,.72);
}
.definition-facts dt {
  margin-bottom: 4px;
  color: var(--color-accent-strong);
  font-weight: 800;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.definition-facts dd { margin: 0; color: var(--color-muted); }

.section-heading--left { text-align: left; max-width: 820px; margin-left: 0; }
.section-heading--left h2 { margin-top: 0; }
.section-heading h2::after { margin-left: 0; }

.guide-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  overflow: hidden;
  background: rgba(211,224,234,.13);
}
.guide-step {
  min-height: 260px;
  padding: 24px;
  background: linear-gradient(180deg, rgba(13,20,27,.96), rgba(8,13,18,.96));
}
.guide-step__number {
  display: block;
  margin-bottom: 44px;
  color: rgba(233,239,244,.74);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .18em;
}
.guide-step h3 { margin: 0 0 10px; font-size: 21px; line-height: 1.2; }
.guide-step h3 a { color: var(--color-text); text-decoration: none; }
.guide-step h3 a:hover { color: #fff; }
.guide-step p { margin: 0; color: var(--color-muted); font-size: 15px; }

.structure-list,
.types-map,
.use-list,
.question-links {
  display: grid;
  gap: 12px;
}
.structure-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.types-map { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.use-list { grid-template-columns: 1fr; }
.ref-link a {
  display: grid;
  gap: 10px;
  height: 100%;
  min-height: 150px;
  padding: 20px;
  color: var(--color-text);
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background:
    linear-gradient(90deg, rgba(230,237,242,.11) 0 4px, transparent 4px),
    linear-gradient(180deg, rgba(17,25,33,.92), rgba(8,13,18,.92));
}
.ref-link a:hover {
  border-color: rgba(235,242,247,.42);
  background:
    linear-gradient(90deg, rgba(240,245,249,.34) 0 4px, transparent 4px),
    linear-gradient(180deg, rgba(20,29,38,.96), rgba(9,14,20,.96));
  text-decoration: none;
}
.ref-link__label { color: var(--color-accent-strong); font-size: 20px; font-weight: 800; line-height: 1.15; }
.ref-link__text { color: var(--color-muted); font-size: 14px; }
.ref-link--thin a { min-height: 190px; }
.ref-link--compact a { min-height: 0; padding: 16px 18px; }
.ref-link--compact .ref-link__label { font-size: 17px; }

.home-compare-use {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr);
  gap: 22px;
}
.compare-panel,
.use-panel,
.home-questions {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(14,22,30,.96), rgba(7,12,18,.92));
}
.text-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--color-accent-strong);
  font-weight: 800;
  text-decoration: none;
}
.home-questions {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: 24px;
  align-items: start;
}
.question-links a {
  display: block;
  padding: 16px 18px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: rgba(255,255,255,.035);
  text-decoration: none;
}
.question-links a:hover {
  border-color: var(--color-border-strong);
  background: var(--color-accent-soft);
}

.page-intro--reference {
  grid-template-columns: minmax(0, 1fr) minmax(260px, 34%);
  gap: 28px;
  padding: 30px;
  background:
    linear-gradient(90deg, rgba(219,231,240,.11) 0 6px, transparent 6px),
    linear-gradient(135deg, rgba(15, 24, 32, .96), rgba(7, 12, 17, .94));
  border-color: rgba(205, 219, 229, .20);
  box-shadow: none;
}
.page-intro--reference h1 {
  font-size: clamp(34px, 4.2vw, 54px);
}
.page-intro--reference .page-intro__media {
  max-height: 250px;
  border-radius: 18px;
  opacity: .82;
}
.page-intro--reference .page-intro__media img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.child-cards--reference .child-cards__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.child-cards--reference .child-card {
  position: relative;
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  min-height: 190px;
  padding: 18px;
  background: linear-gradient(135deg, rgba(14,22,30,.94), rgba(8,13,18,.94));
  border: 1px solid var(--color-border);
  border-radius: 22px;
}
.child-card__index {
  position: absolute;
  right: 18px;
  top: 14px;
  color: rgba(232,239,244,.34);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .14em;
}
.child-cards--reference .child-card__media {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.10);
}
.child-cards--reference .child-card__media img {
  width: 112px;
  height: 100%;
  min-height: 150px;
  object-fit: cover;
}
.child-cards--reference .child-card__content {
  border-top: 0;
  padding: 0 30px 0 0;
}
.child-cards--reference .child-card__title { margin: 8px 0 10px; font-size: 22px; }
.child-cards--reference .child-card__title a { color: var(--color-text); text-decoration: none; }
.child-cards--reference .child-card__text { color: var(--color-muted); }
.child-cards--reference .card-link { color: var(--color-accent-strong); }

.page-body {
  max-width: 920px;
  margin-left: 0;
  background:
    linear-gradient(90deg, rgba(219,231,240,.09) 0 4px, transparent 4px),
    linear-gradient(180deg, rgba(12,19,26,.88), rgba(8,13,18,.88));
  border-color: rgba(205, 219, 229, .16);
}
.page-body h2 {
  margin-top: 1.35em;
  padding-top: .35em;
  border-top: 1px solid rgba(214,226,235,.12);
}
.page-body h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }

@media (min-width: 1041px) and (max-width: 1180px) {
  .site-logo__image { width: 138px; }
  .main-menu__link { font-size: 13px; padding-inline: 7px; }
}

@media (max-width: 1040px) {
  .info-hero,
  .home-definition,
  .home-compare-use,
  .home-questions,
  .page-intro--reference {
    grid-template-columns: 1fr;
  }
  .info-hero { min-height: 0; }
  .info-hero__route { align-self: stretch; }
  .guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .structure-list { grid-template-columns: 1fr; }
  .types-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-intro--reference .page-intro__media,
  .page-intro--reference .page-intro__media img { max-height: 320px; height: auto; }
  .child-cards--reference .child-cards__grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .info-hero,
  .home-definition,
  .compare-panel,
  .use-panel,
  .home-questions,
  .page-intro--reference,
  .page-body {
    padding: 22px;
    border-radius: 22px;
  }
  .info-hero__actions { display: grid; }
  .guide-grid,
  .types-map { grid-template-columns: 1fr; }
  .guide-step { min-height: 0; }
  .guide-step__number { margin-bottom: 26px; }
  .child-cards--reference .child-card {
    grid-template-columns: 1fr;
  }
  .child-cards--reference .child-card__media img {
    width: 100%;
    height: 180px;
    min-height: 0;
  }
  .child-cards--reference .child-card__content { padding-right: 0; }
}

/* v4: readability and stronger silver-reference style */
body.theme-silver {
  --container: 1220px;
  --color-text: #e6edf2;
  --color-muted: #aebac4;
  --color-accent: #ccd7df;
  --color-accent-rgb: 204, 215, 223;
  --color-accent-soft: rgba(204, 215, 223, .18);
  --color-accent-strong: #f6fafc;
  font-size: 17px;
  line-height: 1.68;
}

.theme-silver .site-header__inner {
  min-height: 70px;
  gap: 18px;
}

.theme-silver .site-logo__image {
  width: 168px;
}

.theme-silver .main-menu__list {
  gap: 4px;
}

.theme-silver .main-menu__link {
  font-size: 14.5px;
  padding: 9px 10px;
  letter-spacing: .01em;
}

.theme-silver .main-menu__dropdown {
  width: min(360px, 82vw);
  padding: 12px;
  top: calc(100% + 8px);
}

.theme-silver .main-menu__item.has-dropdown::after,
.theme-silver .language-menu::after {
  height: 18px;
}

.theme-silver .main-menu__dropdown a {
  font-size: 14.5px;
  padding: 10px 12px;
  line-height: 1.35;
}

.theme-silver .language-menu__current {
  font-size: 13.5px;
  min-height: 34px;
  padding: 8px 12px;
}

.theme-silver .site-main {
  padding-top: 40px;
}

.theme-silver .info-hero {
  min-height: 500px;
  margin-top: 18px;
  margin-bottom: 66px;
  padding: clamp(40px, 5vw, 70px);
  grid-template-columns: minmax(0, 1fr) minmax(320px, 390px);
  border-color: rgba(229, 238, 245, .32);
  box-shadow:
    0 28px 90px rgba(0,0,0,.44),
    inset 0 0 0 1px rgba(255,255,255,.055);
}

.theme-silver .info-hero::after {
  content: "";
  position: absolute;
  left: 38px;
  right: 38px;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245,250,252,.72), transparent);
  opacity: .72;
  pointer-events: none;
}

.theme-silver .info-hero__content {
  max-width: 820px;
}

.theme-silver .info-hero h1 {
  font-size: clamp(42px, 5.6vw, 72px);
}

.theme-silver .info-hero p {
  max-width: 720px;
  color: #cad4dc;
  font-size: 19px;
  line-height: 1.65;
}

.theme-silver .info-hero__route {
  padding: 24px;
  border-color: rgba(235,244,250,.30);
  background: linear-gradient(180deg, rgba(13, 21, 29, .84), rgba(7,12,18,.66));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.045);
}

.theme-silver .info-hero__route strong {
  font-size: 15px;
  letter-spacing: .02em;
}

.theme-silver .info-hero__route a {
  padding: 12px 0;
  color: #d3dce3;
  font-size: 15.5px;
}

.theme-silver .btn {
  min-height: 48px;
  padding-inline: 20px;
}

.theme-silver .home-definition,
.theme-silver .home-guide,
.theme-silver .home-structure,
.theme-silver .home-types-map,
.theme-silver .home-compare-use,
.theme-silver .home-questions {
  margin-bottom: 58px;
}

.theme-silver .home-definition {
  padding: 38px;
  gap: 34px;
  border-color: rgba(216, 229, 238, .24);
}

.theme-silver .home-definition__main h2,
.theme-silver .compare-panel h2,
.theme-silver .use-panel h2,
.theme-silver .home-questions h2 {
  font-size: clamp(32px, 3.7vw, 46px);
}

.theme-silver .home-definition__main p,
.theme-silver .compare-panel p,
.theme-silver .guide-step p,
.theme-silver .ref-link__text,
.theme-silver .definition-facts dd {
  color: #b8c4cd;
}

.theme-silver .home-definition__main p,
.theme-silver .compare-panel p {
  font-size: 18px;
  line-height: 1.72;
}

.theme-silver .definition-facts div {
  padding: 18px 20px;
}

.theme-silver .section-heading {
  margin-bottom: 26px;
}

.theme-silver .section-kicker,
.theme-silver .info-hero__kicker,
.theme-silver .page-intro__type {
  color: #eef4f8;
  opacity: .95;
}

.theme-silver .section-heading h2 {
  font-size: clamp(28px, 3.4vw, 42px);
}

.theme-silver .section-heading h2::after {
  width: 96px;
  height: 2px;
  background: linear-gradient(90deg, rgba(246,250,252,.1), rgba(246,250,252,.95), rgba(246,250,252,.1));
  box-shadow: 0 0 18px rgba(230,238,244,.28);
}

.theme-silver .guide-grid {
  gap: 16px;
  border: 0;
  background: transparent;
  border-radius: 0;
  overflow: visible;
}

.theme-silver .guide-step {
  min-height: 245px;
  border: 1px solid rgba(209, 224, 235, .18);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(18,27,36,.95), rgba(8,13,18,.95)),
    linear-gradient(90deg, rgba(240,245,249,.26), transparent);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.035);
}

.theme-silver .guide-step__number {
  margin-bottom: 34px;
  color: rgba(243,248,251,.82);
}

.theme-silver .guide-step h3 {
  font-size: 22px;
}

.theme-silver .guide-step p {
  font-size: 15.8px;
  line-height: 1.62;
}

.theme-silver .structure-list,
.theme-silver .types-map,
.theme-silver .use-list,
.theme-silver .question-links {
  gap: 16px;
}

.theme-silver .ref-link a {
  padding: 22px;
  border-color: rgba(209, 224, 235, .20);
  background:
    linear-gradient(90deg, rgba(238,245,250,.22) 0 4px, transparent 4px),
    linear-gradient(180deg, rgba(18,27,36,.94), rgba(8,13,18,.94));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.025);
}

.theme-silver .ref-link__label {
  color: #eef4f8;
  font-size: 21px;
}

.theme-silver .ref-link__text {
  font-size: 15.2px;
  line-height: 1.58;
}

.theme-silver .ref-link--thin a {
  min-height: 175px;
}

.theme-silver .compare-panel,
.theme-silver .use-panel,
.theme-silver .home-questions {
  padding: 36px;
  border-color: rgba(215, 228, 238, .22);
}

.theme-silver .text-link {
  color: #f4f8fb;
  border-bottom: 1px solid rgba(244,248,251,.45);
}

.theme-silver .question-links a {
  padding: 18px 20px;
  font-size: 16px;
  border-color: rgba(215, 228, 238, .20);
}

.page-home.theme-silver .page-body {
  max-width: 1040px;
  margin: 28px auto 0;
  padding: 42px 48px;
  background:
    linear-gradient(90deg, rgba(219,231,240,.12) 0 5px, transparent 5px),
    linear-gradient(180deg, rgba(14,22,30,.92), rgba(8,13,18,.92));
}

.page-home.theme-silver .page-body p {
  font-size: 17.5px;
  line-height: 1.75;
  color: #c5ced6;
}

.theme-silver .site-footer {
  padding-top: 52px;
}

.theme-silver .site-footer__nav {
  gap: 34px;
}

.theme-silver .site-footer__brand p,
.theme-silver .site-footer__nav a,
.theme-silver .site-footer__bottom {
  font-size: 15px;
  color: #aebac4;
}

.theme-silver .site-footer__nav strong {
  color: #edf3f7;
  font-size: 15.5px;
}

@media (min-width: 1041px) and (max-width: 1240px) {
  .theme-silver .site-logo__image { width: 150px; }
  .theme-silver .main-menu__link { font-size: 13.5px; padding-inline: 7px; }
  .theme-silver .dropdown-toggle { width: 22px; margin-left: -8px; }
}

@media (max-width: 1120px) {
  .theme-silver .site-logo__image { width: 150px; }
}

@media (max-width: 1040px) {
  body.theme-silver { font-size: 16px; }
  .theme-silver .info-hero { min-height: 0; padding: 32px; }
  .theme-silver .guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .theme-silver .site-footer__nav { gap: 24px; }
}

@media (max-width: 640px) {
  .theme-silver .info-hero,
  .theme-silver .home-definition,
  .theme-silver .compare-panel,
  .theme-silver .use-panel,
  .theme-silver .home-questions,
  .page-home.theme-silver .page-body {
    padding: 24px;
  }
  .theme-silver .info-hero h1 { font-size: clamp(34px, 11vw, 46px); }
  .theme-silver .info-hero p { font-size: 17px; }
}

/* v5: refined information-home interactions and open definition block */
.theme-silver .home-definition {
  padding: 20px 0 24px 26px;
  border: 0;
  border-radius: 0;
  background: linear-gradient(90deg, rgba(238,245,250,.14) 0 4px, transparent 4px);
  box-shadow: none;
}

.guide-step {
  padding: 0;
}

.guide-step__link {
  display: block;
  height: 100%;
  padding: 24px;
  color: var(--color-text);
  text-decoration: none;
  border-radius: inherit;
  transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}

.guide-step__link:hover,
.guide-step__link:focus-visible {
  color: var(--color-text);
  text-decoration: none;
  transform: translateY(-4px);
  background: linear-gradient(180deg, rgba(24,35,45,.98), rgba(10,16,22,.98));
  box-shadow: 0 18px 34px rgba(0,0,0,.28), inset 0 0 0 1px rgba(245,249,252,.08);
}

.guide-step__link:hover h3,
.guide-step__link:focus-visible h3 {
  color: #fff;
}

.ref-link a,
.question-links a {
  transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
}

.ref-link a:hover,
.ref-link a:focus-visible,
.question-links a:hover,
.question-links a:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(0,0,0,.24), inset 0 0 0 1px rgba(245,249,252,.07);
  text-decoration: none;
}

.theme-silver .ref-link a:hover,
.theme-silver .ref-link a:focus-visible,
.theme-silver .question-links a:hover,
.theme-silver .question-links a:focus-visible {
  border-color: rgba(238,245,250,.46);
  background:
    linear-gradient(90deg, rgba(238,245,250,.42) 0 4px, transparent 4px),
    linear-gradient(180deg, rgba(22,32,42,.98), rgba(9,14,20,.98));
}

.theme-silver .guide-step:hover {
  border-color: rgba(238,245,250,.42);
}

.theme-silver .text-link {
  border-bottom: 0;
  text-decoration: none;
  transition: color .18s ease, transform .18s ease;
}

.theme-silver .text-link:hover,
.theme-silver .text-link:focus-visible {
  color: #fff;
  text-decoration: none;
  transform: translateX(3px);
}

@media (max-width: 700px) {
  .theme-silver .home-definition {
    padding: 14px 0 18px 18px;
  }
  .guide-step__link {
    padding: 22px;
  }
}