/* Variant 1a — "Docs Portal": top nav, blue accent */
body.variant-a {
  --bg: #0b0d10;
  --panel-bg: #0b0d10;
  --card-bg: #0e1115;
  --code-header-bg: #14171c;
  --text: #e7eaee;
  --text-muted: #98a1ac;
  --text-dim: #7c848f;
  --border: #1f242b;
  --border-2: #232830;
  --border-hover: #3c444e;
  --accent: #5b8cff;
  --accent-hover: #8fb0ff;
  --accent-bg: #5b8cff14;
  --accent-border: #5b8cff33;
  --font-body: 'IBM Plex Sans', Helvetica, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Header */
.variant-a .lab-header {
  position: sticky; top: 0; z-index: 5;
  background: rgba(11,13,16,0.9); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.variant-a .lab-header__inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 40px; height: 66px; display: flex; align-items: center; gap: 34px;
}
.variant-a .lab-logo { display: flex; align-items: center; gap: 11px; color: var(--text); }
.variant-a .lab-logo img { width: 28px; height: 28px; border-radius: 7px; object-fit: cover; }
.variant-a .lab-logo span { font-weight: 600; font-size: 16.5px; letter-spacing: -0.01em; }
.variant-a .lab-nav { margin-right: auto; }
.variant-a .lab-nav ul { display: flex; gap: 18px; font-size: 15px; flex-wrap: nowrap; white-space: nowrap; }
.variant-a .lab-nav a { color: var(--text-muted); padding: 22px 0; border-bottom: 2px solid transparent; }
.variant-a .lab-nav a:hover,
.variant-a .lab-nav a.is-current,
.variant-a .lab-nav li.current-menu-item > a { color: var(--text); }
.variant-a .lab-nav a.is-current,
.variant-a .lab-nav li.current-menu-item > a { border-bottom-color: var(--accent); }
.variant-a .lab-search {
  display: flex; align-items: center; gap: 9px; padding: 8px 12px; width: 196px;
  background: #14171c; border: 1px solid #262b32; border-radius: 9px; color: var(--text-dim); font-size: 14.5px;
}
.variant-a .lab-search:hover { border-color: var(--border-hover); }
.variant-a .lab-search span:nth-child(2) { margin-right: auto; white-space: nowrap; }
.variant-a .lab-search kbd {
  font-family: var(--font-mono); font-size: 11px; padding: 2px 5px; border: 1px solid #2d333a; border-radius: 4px;
}
.variant-a .lab-github-link { font-size: 14.5px; color: var(--text-muted); white-space: nowrap; }
.variant-a .lab-github-link:hover { color: var(--text); }

/* Hero */
.variant-a .lab-hero {
  padding: 76px 40px 64px; display: grid; grid-template-columns: minmax(0,1fr) 500px; gap: 56px; align-items: center;
}
.variant-a .lab-hero--solo { grid-template-columns: minmax(0,1fr); }
.variant-a .lab-hero--solo p { max-width: 68ch; }
.variant-a .lab-hero__badge {
  display: inline-block; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-bg); border: 1px solid var(--accent-border); padding: 5px 11px;
  border-radius: 100px; margin-bottom: 24px;
}
.variant-a .lab-hero h1 { font-size: 54px; line-height: 1.07; letter-spacing: -0.03em; font-weight: 700; margin: 0 0 20px; }
.variant-a .lab-hero p { font-size: 19px; line-height: 1.65; color: var(--text-muted); margin: 0 0 32px; max-width: 54ch; }
.variant-a .lab-hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.variant-a .lab-btn {
  display: inline-flex; align-items: center; gap: 9px; font-weight: 600; font-size: 15.5px;
  padding: 13px 22px; border-radius: 10px;
}
.variant-a .lab-btn--primary { background: var(--accent); color: var(--bg); }
.variant-a .lab-btn--primary:hover { background: var(--accent-hover); }
.variant-a .lab-btn--secondary { background: #14171c; border: 1px solid #2d333a; color: var(--text); font-weight: 500; }
.variant-a .lab-btn--secondary:hover { border-color: var(--border-hover); }

.variant-a .lab-code {
  background: #0e1115; border: 1px solid var(--border-2); border-radius: 14px; overflow: hidden;
  box-shadow: 0 30px 70px -24px #000000cc;
}
.variant-a .lab-code__bar {
  display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border);
  background: var(--code-header-bg);
}
.variant-a .lab-code__bar .filename { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim); }
.variant-a .lab-code__bar .tag {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--accent); background: var(--accent-bg); padding: 2px 7px; border-radius: 5px;
}
.variant-a .lab-code__bar button {
  margin-left: auto; font-family: var(--font-mono); font-size: 12px; color: var(--text-muted);
  background: #191d23; border: 1px solid #2d333a; padding: 5px 10px; border-radius: 6px; cursor: pointer;
}
.variant-a .lab-code__bar button:hover { color: var(--text); border-color: var(--border-hover); }
.variant-a .lab-code pre { margin: 0; padding: 24px 22px; font-family: var(--font-mono); font-size: 15px; line-height: 1.85; color: #c9d1dc; overflow-x: auto; }
.variant-a .lab-code__foot { padding: 14px 22px; border-top: 1px solid var(--border); font-size: 14px; color: var(--text-dim); }

/* Quick nav */
.variant-a .lab-quicknav { padding: 0 40px 76px; }
.variant-a .lab-quicknav h2 {
  font-family: var(--font-mono); font-size: 13.5px; font-weight: 500; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--text-dim); margin: 0 0 18px;
}
.variant-a .lab-quicknav__grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.variant-a .lab-quicknav__card {
  display: block; background: var(--card-bg); border: 1px solid var(--border-2); border-radius: 12px; padding: 20px; color: var(--text);
}
.variant-a .lab-quicknav__card:hover { border-color: var(--border-hover); }
.variant-a .lab-quicknav__card .name { font-family: var(--font-mono); font-size: 15.5px; color: var(--accent); margin-bottom: 8px; }
.variant-a .lab-quicknav__card .desc { font-size: 14.5px; color: var(--text-muted); line-height: 1.5; margin-bottom: 16px; }
.variant-a .lab-quicknav__card .count { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim); }

/* Posts */
.variant-a .lab-posts { padding: 0 40px 84px; }
.variant-a .lab-posts__header {
  display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.variant-a .lab-posts__header h2 { font-size: 28px; letter-spacing: -0.02em; font-weight: 600; margin: 0; }
.variant-a .lab-posts__header a { font-size: 15px; color: var(--text-muted); }
.variant-a .lab-posts__header a:hover { color: var(--text); }

.variant-a .lab-posts__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.variant-a .lab-post-card {
  display: flex; flex-direction: column; background: var(--card-bg); border: 1px solid var(--border-2);
  border-radius: 14px; overflow: hidden; color: var(--text);
}
.variant-a .lab-post-card:hover { border-color: var(--border-hover); }
.variant-a .lab-post-card__thumb { aspect-ratio: 1.9; background: var(--code-header-bg); overflow: hidden; }
.variant-a .lab-post-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.variant-a .lab-post-card__body { padding: 20px; display: flex; flex-direction: column; flex: 1; gap: 10px; }
.variant-a .lab-post-card__meta {
  display: flex; align-items: center; gap: 9px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.05em; text-transform: uppercase;
}
.variant-a .lab-post-card__meta .cat { color: var(--accent); }
.variant-a .lab-post-card__meta .dot { color: #3d444d; }
.variant-a .lab-post-card__meta .read { color: var(--text-dim); }
.variant-a .lab-post-card h3 { font-size: 19px; line-height: 1.35; letter-spacing: -0.015em; font-weight: 600; margin: 0; }
.variant-a .lab-post-card p { font-size: 15px; color: var(--text-muted); line-height: 1.6; margin: 0; }
.variant-a .lab-post-card__foot {
  margin-top: auto; padding-top: 14px; display: flex; gap: 14px; font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim);
}

.variant-a .lab-posts__list { display: flex; flex-direction: column; }
.variant-a .lab-post-row {
  display: grid; grid-template-columns: 150px minmax(0,1fr) 110px; gap: 24px; align-items: center;
  padding: 18px 12px; border-bottom: 1px solid #1a1e23; color: var(--text); border-radius: 8px;
}
.variant-a .lab-post-row:hover { background: var(--card-bg); }
.variant-a .lab-post-row .cat { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); }
.variant-a .lab-post-row .title-wrap { display: flex; flex-direction: column; gap: 4px; }
.variant-a .lab-post-row .title { font-size: 18px; font-weight: 600; letter-spacing: -0.015em; }
.variant-a .lab-post-row .sub { font-size: 14.5px; color: var(--text-dim); }
.variant-a .lab-post-row .date { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim); text-align: right; }

/* Footer */
.variant-a .lab-footer { border-top: 1px solid var(--border); font-size: 14.5px; color: var(--text-dim); }
.variant-a .lab-footer__inner {
  max-width: 1280px; margin: 0 auto;
  padding: 30px 40px; display: flex; align-items: center; gap: 20px;
}
.variant-a .lab-footer .copy { margin-right: auto; }
.variant-a .lab-footer a { color: var(--text-muted); }

/* Content column (everything inside <main>) stays centered even though the
   header/footer bars themselves span the full window width. */
.variant-a #main { max-width: 1280px; margin: 0 auto; }

/* About page */
.variant-a .lab-about { padding: 64px 40px 48px; display: grid; grid-template-columns: 320px minmax(0,1fr); gap: 52px; align-items: start; }
.variant-a .lab-about__side { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 18px; }
.variant-a .lab-about__side img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 14px; border: 1px solid var(--border-2); }
.variant-a .lab-about__links { display: flex; flex-direction: column; gap: 8px; }
.variant-a .lab-about__links a {
  display: flex; justify-content: space-between; padding: 11px 14px; background: var(--card-bg);
  border: 1px solid var(--border-2); border-radius: 9px; font-size: 14.5px; color: var(--text);
}
.variant-a .lab-about__links a:hover { border-color: var(--border-hover); }
.variant-a .lab-about__links a span { color: var(--accent); }
.variant-a .lab-about__content { max-width: 66ch; }
.variant-a .lab-about__eyebrow { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.variant-a .lab-about__content h1 { font-size: 46px; line-height: 1.1; letter-spacing: -0.03em; font-weight: 700; margin: 0 0 20px; }
.variant-a .lab-about__content .lede { font-size: 20px; line-height: 1.6; color: var(--text); margin: 0 0 22px; }
.variant-a .lab-about__content .body { font-size: 17.5px; line-height: 1.75; color: var(--text-muted); margin: 0 0 40px; }
.variant-a .lab-about__content h2 {
  font-family: var(--font-mono); font-size: 13.5px; font-weight: 500; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--text-dim); margin: 0 0 16px;
}
.variant-a .lab-tracks { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }
.variant-a .lab-track {
  display: grid; grid-template-columns: 44px minmax(0,1fr); gap: 16px; background: var(--card-bg);
  border: 1px solid var(--border-2); border-radius: 12px; padding: 20px;
}
.variant-a .lab-track .num { font-family: var(--font-mono); font-size: 14px; color: var(--accent); }
.variant-a .lab-track .name { display: block; font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.variant-a .lab-track .desc { display: block; font-size: 15.5px; color: var(--text-muted); line-height: 1.6; }
.variant-a .lab-about__cta {
  background: var(--card-bg); border: 1px solid var(--border-2); border-radius: 12px; padding: 22px 24px; font-size: 16px; color: var(--text-muted);
}

/* Справочник docs archive: sits inside a sticky 66px header */
.variant-a .lab-docs-tabs { position: sticky; top: 65px; }
.variant-a .lab-docs-sidebar { top: 114px; }
.variant-a .lab-doc-block { scroll-margin-top: 124px; }

@media (max-width: 960px) {
  .variant-a .lab-hero { grid-template-columns: 1fr; }
  .variant-a .lab-posts__grid, .variant-a .lab-quicknav__grid { grid-template-columns: repeat(2,1fr); }
  .variant-a .lab-nav { display: none; }
  .variant-a .lab-about { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .variant-a .lab-posts__grid, .variant-a .lab-quicknav__grid { grid-template-columns: 1fr; }
  .variant-a .lab-post-row { grid-template-columns: 1fr; gap: 6px; }
}