:root {
  --bg: #0a0a0b;
  --panel: #151517;
  --panel-soft: #111113;
  --text: #eeeee9;
  --muted: #aaa9a3;
  --faint: #77756f;
  --accent: #6dc400;
  --accent-soft: rgba(109, 196, 0, 0.12);
  --border: rgba(255, 255, 255, 0.1);
  --serif: "Playfair Display", Georgia, serif;
  --sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", monospace;
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 80% 0%, rgba(109, 196, 0, 0.08), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.shell {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 11, 0.9);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.topbar .shell {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.back-link {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-decoration: none;
}

.back-link:hover {
  color: var(--text);
}

.lang-btn {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font: 0.66rem var(--mono);
  cursor: pointer;
}

.lang-btn:hover {
  border-color: var(--faint);
  color: var(--text);
}

.hero {
  padding: 112px 0 72px;
}

.eyebrow {
  margin-bottom: 22px;
  color: var(--accent);
  font: 0.7rem var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.12;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.8rem, 8vw, 5.7rem);
  letter-spacing: -0.035em;
}

h1 em {
  color: var(--accent);
  font-weight: 400;
}

.lead {
  max-width: 720px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2.4vw, 1.28rem);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 30px;
  padding: 9px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font: 0.7rem var(--mono);
}

.status::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
  box-shadow: 0 0 16px var(--accent);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding-bottom: 88px;
}

.card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--panel), var(--panel-soft));
}

.card-label {
  color: var(--accent);
  font: 0.64rem var(--mono);
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.card h2 {
  margin-top: 14px;
  font-size: 1.55rem;
}

.card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.notice {
  margin-bottom: 88px;
  padding: 28px;
  border: 1px solid rgba(109, 196, 0, 0.28);
  border-radius: 16px;
  background: var(--accent-soft);
}

.notice strong {
  display: block;
  margin-bottom: 8px;
}

.notice p {
  margin: 0;
  color: var(--muted);
}

.document {
  max-width: 760px;
  padding: 94px 0 100px;
}

.document h1 {
  font-size: clamp(2.5rem, 7vw, 4.7rem);
}

.updated {
  margin: 18px 0 50px;
  color: var(--faint);
  font: 0.7rem var(--mono);
}

.document section {
  padding: 30px 0;
  border-top: 1px solid var(--border);
}

.document h2 {
  margin-bottom: 16px;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

.document p,
.document li {
  color: var(--muted);
}

.document p {
  margin: 0 0 14px;
}

.document ul {
  margin: 12px 0 0;
  padding-left: 22px;
}

.document li + li {
  margin-top: 9px;
}

.document a,
.notice a {
  color: var(--accent);
  text-underline-offset: 3px;
}

footer {
  border-top: 1px solid var(--border);
}

footer .shell {
  min-height: 104px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--faint);
  font-size: 0.8rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

[data-lang-en] {
  display: none;
}

.notice strong[data-lang-en] {
  display: none;
}

html[lang="en"] [data-lang-ru] {
  display: none;
}

html[lang="en"] [data-lang-en] {
  display: revert;
}

html[lang="en"] .notice strong[data-lang-en] {
  display: block;
}

@media (max-width: 680px) {
  .shell {
    width: min(100% - 28px, 920px);
  }

  .back-link {
    display: none;
  }

  .hero {
    padding: 82px 0 56px;
  }

  .grid {
    grid-template-columns: 1fr;
    padding-bottom: 64px;
  }

  .document {
    padding-top: 72px;
  }

  footer .shell {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 24px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}