:root {
  --bg: #f1f3f5;
  --surface: #ffffff;
  --surface-soft: #e9edf1;
  --text: #20262d;
  --muted: #65717d;
  --line: #d8dee4;
  --accent: #4d78a8;
  --accent-dark: #365d89;
  --dark: #252c33;
  --shell: min(1160px, calc(100% - 40px));
  --radius: 18px;
  --shadow: 0 18px 50px rgba(34, 44, 54, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; background: #fff; color: #000; padding: 10px 16px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 247, 248, .9);
  border-bottom: 1px solid rgba(120, 132, 143, .2);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 36px; }
.brand { display: flex; align-items: center; gap: 11px; min-width: max-content; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--dark);
  color: #fff;
  font-weight: 750;
  font-size: 20px;
}
.brand b, .brand small { display: block; line-height: 1.2; }
.brand b { font-size: 14px; font-weight: 750; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.main-nav { display: flex; gap: 25px; margin-left: auto; }
.main-nav a { color: #4f5963; font-size: 14px; transition: color .2s; }
.main-nav a:hover { color: var(--accent-dark); }
.search-mini { display: flex; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.search-mini input { width: 155px; padding: 10px 12px; border: 0; outline: 0; background: transparent; color: var(--text); }
.search-mini button { width: 38px; border: 0; border-left: 1px solid var(--line); background: #fff; color: var(--accent); font-size: 18px; cursor: pointer; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 11px; border: 1px solid var(--line); border-radius: 11px; background: #fff; cursor: pointer; }
.menu-toggle span { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--text); transition: transform .2s, opacity .2s; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.mobile-panel { border-top: 1px solid var(--line); background: rgba(246,247,248,.98); box-shadow: 0 20px 35px rgba(32,38,45,.12); }
.mobile-panel[hidden] { display: none; }
.mobile-panel-inner { padding-block: 20px 26px; }
.mobile-nav { display: grid; }
.mobile-nav a { padding: 13px 4px; border-bottom: 1px solid var(--line); color: #3e4953; font-weight: 650; }
.mobile-search { margin-top: 20px; }
.mobile-search label { display: block; margin-bottom: 7px; color: var(--muted); font-size: 12px; }
.mobile-search > div { display: flex; }
.mobile-search input { flex: 1; min-width: 0; padding: 12px 13px; border: 1px solid var(--line); border-radius: 10px 0 0 10px; background: #fff; font: inherit; }
.mobile-search button { padding: 0 17px; border: 0; border-radius: 0 10px 10px 0; background: var(--dark); color: #fff; font-weight: 650; }
.mobile-vk-link { display: inline-flex; margin-top: 20px; color: var(--accent-dark); font-size: 14px; font-weight: 700; }

.hero { padding: 72px 0 82px; background: #f7f8f9; border-bottom: 1px solid var(--line); }
.hero-inner { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 64px; }
.hero-copy { max-width: 540px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--accent); }
h1, h2, h3 { margin: 0; color: var(--text); line-height: 1.12; letter-spacing: -.035em; }
.hero h1 { margin: 20px 0 22px; font-size: clamp(48px, 5.4vw, 76px); font-weight: 680; }
.hero-copy > p { max-width: 520px; margin: 0 0 32px; color: var(--muted); font-size: 19px; }
.hero-actions { display: flex; align-items: center; gap: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 0;
  border-radius: 11px;
  background: var(--dark);
  color: #fff;
  font: 650 14px/1 inherit;
  cursor: pointer;
  transition: transform .2s, background .2s;
}
.button:hover { background: #11161a; transform: translateY(-2px); }
.text-link { color: #45515d; font-size: 14px; font-weight: 650; }
.text-link:hover { color: var(--accent-dark); }
.hero-visual { position: relative; overflow: hidden; border-radius: 24px; box-shadow: var(--shadow); background: #e5e8eb; }
.hero-visual picture { display: block; height: 100%; }
.hero-visual img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.hero-note {
  position: absolute;
  right: 18px;
  bottom: 18px;
  max-width: 245px;
  padding: 14px 16px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 13px;
  background: rgba(255,255,255,.86);
  box-shadow: 0 8px 30px rgba(44, 55, 65, .12);
  backdrop-filter: blur(12px);
}
.hero-note span { color: var(--accent-dark); font-size: 12px; font-weight: 700; }
.hero-note p { margin: 3px 0 0; color: var(--muted); font-size: 12px; line-height: 1.45; }

.topics, .materials { padding: 80px 0; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 32px; }
.section-heading h2 { margin-top: 10px; font-size: clamp(36px, 4vw, 52px); font-weight: 660; }
.section-heading > p { max-width: 450px; margin: 0; color: var(--muted); }
.topic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.topic-grid a {
  position: relative;
  min-height: 170px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.68);
  transition: transform .2s, border-color .2s, background .2s, box-shadow .2s;
}
.topic-grid a:hover { transform: translateY(-3px); border-color: #bac7d3; background: #fff; box-shadow: var(--shadow); }
.topic-grid span { color: #9aa4ae; font: 12px/1.2 ui-monospace, monospace; }
.topic-grid b { display: block; margin-top: 27px; font-size: 21px; line-height: 1.25; }
.topic-grid small { display: block; margin-top: 8px; color: var(--muted); font-size: 14px; }
.topic-grid a > i { position: absolute; right: 24px; top: 22px; color: var(--accent); font-style: normal; }

.materials { border-top: 1px solid var(--line); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); transition: transform .2s, box-shadow .2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-media { position: relative; display: block; overflow: hidden; aspect-ratio: 16/9; background: var(--surface-soft); }
.card-media picture { display: block; width: 100%; height: 100%; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.card:hover .card-media img { transform: scale(1.025); }
.type-chip { position: absolute; left: 14px; bottom: 14px; padding: 6px 10px; border-radius: 8px; background: rgba(37,44,51,.9); color: #fff; font-size: 10px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.card-body { padding: 21px; }
.category-link { color: var(--accent-dark); font-size: 11px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.card h3 { margin: 10px 0; font-size: 22px; line-height: 1.25; }
.card h3 a:hover { color: var(--accent-dark); }
.card p { margin: 0 0 20px; color: var(--muted); font-size: 14px; }
.card-meta { display: flex; justify-content: space-between; padding-top: 15px; border-top: 1px solid var(--line); color: #8b96a0; font-size: 12px; }
.card-meta a { color: var(--accent-dark); font-weight: 650; }
.empty { grid-column: 1/-1; padding: 55px; border: 1px dashed #bdc6ce; border-radius: var(--radius); text-align: center; color: var(--muted); }
.empty b { display: block; color: var(--text); font-size: 22px; }

.manifesto { padding: 68px 0; background: var(--dark); }
.manifesto-inner { display: flex; align-items: center; justify-content: space-between; gap: 55px; }
.manifesto .eyebrow { color: #aabfd5; }
.manifesto .eyebrow::before { background: #7895b3; }
.manifesto h2 { max-width: 720px; margin: 14px 0; color: #fff; font-size: clamp(32px, 4vw, 48px); }
.manifesto p { margin: 0; color: #b8c0c8; }
.button-light { min-width: max-content; background: #fff; color: var(--dark); }
.button-light:hover { background: #e8edf1; }

.site-footer { padding: 64px 0 24px; border-top: 1px solid var(--line); background: #e9ecef; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; }
.footer-grid b { font-size: 24px; }
.footer-grid p { max-width: 430px; color: var(--muted); }
.footer-grid > div:not(:first-child) { display: flex; flex-direction: column; gap: 9px; }
.footer-grid a { color: #596570; font-size: 14px; }
.footer-grid a:hover { color: var(--accent-dark); }
.footer-title { margin-bottom: 7px; color: #8b959e; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.footer-bottom { margin-top: 44px; padding-top: 18px; border-top: 1px solid #d1d6da; color: #818b94; font-size: 12px; }

.listing-head { padding: 90px 0 56px; border-bottom: 1px solid var(--line); background: #f7f8f9; }
.listing-head h1 { margin: 17px 0 12px; font-size: clamp(48px, 6vw, 74px); font-weight: 670; }
.listing-head p { max-width: 650px; color: var(--muted); font-size: 18px; }
.search-page { display: flex; max-width: 720px; margin-top: 30px; gap: 10px; }
.search-page input { flex: 1; min-width: 0; padding: 14px 16px; border: 1px solid var(--line); border-radius: 11px; outline: 0; background: #fff; color: var(--text); font-size: 16px; }
.search-page input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(77,120,168,.12); }

.article-page { padding: 48px 0 92px; }
.preview-banner { margin-bottom: 24px; padding: 14px 18px; border: 1px solid #d9b875; border-radius: 12px; background: #fff7e6; color: #6b5427; font-size: 14px; }
.breadcrumbs { display: flex; gap: 10px; margin-bottom: 40px; color: #87919a; font-size: 13px; }
.breadcrumbs a:hover { color: var(--accent-dark); }
.article-header { max-width: 900px; }
.article-tags { display: flex; align-items: center; gap: 14px; color: #8a959e; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.article-tags a { color: var(--accent-dark); }
.article-header h1 { margin: 22px 0 18px; font-size: clamp(42px, 6vw, 70px); font-weight: 670; }
.article-header > p { max-width: 780px; color: var(--muted); font-size: 20px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 9px 20px; margin-top: 22px; color: #7c8791; font-size: 13px; }
.article-meta span:not(:first-child)::before { content: "·"; margin-right: 20px; color: #bdc4ca; }
.article-cover { overflow: hidden; margin: 45px 0 52px; aspect-ratio: 16/9; border-radius: 22px; background: #e6e9ec; box-shadow: var(--shadow); }
.article-cover picture { display: block; width: 100%; height: 100%; }
.article-cover img { width: 100%; height: 100%; object-fit: cover; }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 230px; justify-content: space-between; gap: 60px; }
.article-content { color: #39434c; font-size: 18px; }
.article-content h2, .article-content h3 { margin: 44px 0 16px; color: var(--text); scroll-margin-top: 100px; }
.article-content h2 { font-size: 34px; }
.article-content h3 { font-size: 25px; }
.article-content p, .article-content li { max-width: 760px; }
.article-content a { color: var(--accent-dark); text-decoration: underline; }
.article-content pre { overflow: auto; padding: 18px; border-radius: 12px; background: #242b31; color: #e9eef2; }
.article-content blockquote { margin: 28px 0; padding: 13px 20px; border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; background: #e8edf2; color: var(--text); }
.article-content > ol { display: grid; gap: 14px; margin: 28px 0; padding: 0; counter-reset: article-step; list-style: none; }
.article-content > ol > li { position: relative; min-height: 58px; padding: 18px 20px 18px 68px; border: 1px solid var(--line); border-radius: 14px; background: #fff; counter-increment: article-step; }
.article-content > ol > li::before { content: counter(article-step); position: absolute; left: 18px; top: 16px; display: grid; width: 34px; height: 34px; place-items: center; border-radius: 10px; background: var(--dark); color: #fff; font-size: 14px; font-weight: 750; }
.admonition { margin: 30px 0; padding: 20px 22px; border: 1px solid #cad6e1; border-left: 4px solid var(--accent); border-radius: 12px; background: #eef3f7; }
.admonition.warning { border-color: #e2c9bb; border-left-color: #b96b42; background: #fbf2ed; }
.admonition-title { margin: 0 0 7px !important; color: var(--text); font-size: 14px; font-weight: 750; text-transform: uppercase; letter-spacing: .05em; }
.admonition > :last-child { margin-bottom: 0; }
.article-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 38px 0; padding-top: 24px; border-top: 1px solid var(--line); }
.article-actions button { font: inherit; }
.save-article.saved { background: #2f6547; }
.article-pro { margin-top: 45px; padding: 30px; border-radius: 18px; background: var(--dark); color: #fff; }
.article-pro span { color: #aabfd5; font-size: 11px; font-weight: 750; letter-spacing: .11em; text-transform: uppercase; }
.article-pro h2 { margin: 10px 0 12px; color: #fff; font-size: 30px; }
.article-pro p { margin: 0 0 22px; color: #bac3cb; }
.article-toc { display: grid; gap: 3px; margin: 12px 0 22px; }
.article-toc a { margin: 0; padding: 7px 9px; border-radius: 8px; color: #52606c; line-height: 1.35; }
.article-toc a:hover { background: var(--surface-soft); color: var(--accent-dark); }
.article-toc .toc-level-3 { padding-left: 20px; font-size: 12px; }
.aside-topic { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.video-wrap { overflow: hidden; margin-bottom: 42px; aspect-ratio: 16/9; border-radius: 18px; background: #171a1d; box-shadow: var(--shadow); }
.video-wrap iframe { width: 100%; height: 100%; border: 0; }
.article-aside { position: sticky; top: 100px; align-self: start; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; color: var(--muted); }
.article-aside span, .article-aside b, .article-aside p, .article-aside a { display: block; }
.article-aside span { color: #8a959e; font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.article-aside b { margin-top: 8px; color: var(--text); }
.article-aside p { font-size: 13px; }
.article-aside a { margin-top: 22px; color: var(--accent-dark); font-size: 13px; }
.related { padding-top: 0; }

.pro-section { padding: 80px 0 34px; }
.pro-card {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr);
  gap: 60px;
  padding: 54px;
  border-radius: 26px;
  background: var(--dark);
  color: #fff;
  box-shadow: 0 24px 65px rgba(32, 39, 46, .16);
}
.pro-label {
  display: inline-flex;
  padding: 7px 11px;
  border: 1px solid rgba(170, 195, 220, .28);
  border-radius: 999px;
  color: #b9cde1;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.pro-card h2 { max-width: 700px; margin: 18px 0 15px; color: #fff; font-size: clamp(36px, 4.5vw, 56px); }
.pro-copy > p { max-width: 650px; margin: 0; color: #bac3cb; font-size: 18px; }
.pro-copy ul { display: grid; gap: 10px; margin: 27px 0 0; padding: 0; list-style: none; color: #e4e8eb; }
.pro-copy li { position: relative; padding-left: 26px; }
.pro-copy li::before { content: "✓"; position: absolute; left: 0; color: #91afd0; font-weight: 800; }
.pro-action { display: flex; flex-direction: column; justify-content: center; padding-left: 40px; border-left: 1px solid rgba(255,255,255,.14); }
.pro-action > span { color: #98a5b0; font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.pro-action strong { display: block; margin: 8px 0 25px; font-size: 42px; line-height: 1.15; }
.pro-action strong small { color: #9da8b2; font-size: 14px; font-weight: 500; }
.pro-action > small { margin-top: 12px; color: #8f9aa4; font-size: 11px; text-align: center; }

.author-section { padding: 80px 0 96px; }
.author-grid { display: grid; grid-template-columns: minmax(300px, .72fr) minmax(0, 1.28fr); align-items: center; gap: 72px; }
.author-photo { overflow: hidden; margin: 0; border-radius: 24px; background: #dde1e4; box-shadow: var(--shadow); }
.author-photo img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.author-copy { max-width: 680px; }
.author-copy h2 { margin: 16px 0 24px; font-size: clamp(40px, 5vw, 62px); }
.author-copy p { color: var(--muted); font-size: 17px; }
.author-copy .author-lead { color: var(--text); font-size: 21px; font-weight: 620; }
.author-copy .text-link { display: inline-flex; margin-top: 16px; }

@media (max-width: 960px) {
  .main-nav { display: none; }
  .search-mini { margin-left: auto; }
  .menu-toggle { display: grid; align-content: center; justify-content: center; gap: 4px; }
  .hero-inner { grid-template-columns: 1fr; gap: 42px; }
  .hero-copy { max-width: 760px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-aside { position: static; }
  .pro-card { grid-template-columns: 1fr; gap: 40px; }
  .pro-action { padding: 30px 0 0; border-top: 1px solid rgba(255,255,255,.14); border-left: 0; }
  .author-grid { gap: 45px; }
}

@media (max-width: 680px) {
  :root { --shell: min(100% - 28px, 1160px); }
  .header-inner { min-height: 64px; }
  .search-mini { display: none; }
  .menu-toggle { margin-left: auto; }
  .hero { padding: 52px 0 60px; }
  .hero-inner { gap: 34px; }
  .hero h1 { font-size: 43px; }
  .hero-copy > p { font-size: 17px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 16px; }
  .hero-note { right: 10px; bottom: 10px; max-width: 215px; }
  .topics, .materials { padding: 60px 0; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 15px; }
  .section-heading h2 { font-size: 36px; }
  .topic-grid, .card-grid { grid-template-columns: 1fr; }
  .manifesto { padding: 54px 0; }
  .manifesto-inner { align-items: flex-start; flex-direction: column; gap: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .listing-head { padding: 68px 0 42px; }
  .listing-head h1 { font-size: 45px; }
  .search-page { flex-direction: column; }
  .article-page { padding-top: 34px; }
  .article-header h1 { font-size: 42px; }
  .article-header > p { font-size: 18px; }
  .article-cover { margin: 34px 0; border-radius: 16px; }
  .article-content { font-size: 17px; }
  .article-meta { gap: 7px 14px; }
  .article-meta span:not(:first-child)::before { margin-right: 14px; }
  .article-content > ol > li { padding: 16px 16px 16px 60px; }
  .article-content > ol > li::before { left: 14px; top: 14px; }
  .article-pro { padding: 24px 20px; }
  .pro-section { padding: 60px 0 26px; }
  .pro-card { padding: 30px 24px; border-radius: 20px; }
  .pro-card h2 { font-size: 36px; }
  .pro-copy > p { font-size: 16px; }
  .pro-action strong { font-size: 36px; }
  .author-section { padding: 60px 0 72px; }
  .author-grid { grid-template-columns: 1fr; gap: 35px; }
  .author-photo { max-width: 310px; margin-inline: auto; border-radius: 18px; }
  .author-copy h2 { font-size: 38px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}