/* ===== База знаний: дизайн-система статей (.kb) =====
   Шрифт: один — Roboto (400/500/700).
   Шкала: 14 / 16 / 18 / 22 / 28. Отступы кратны 8.
   Цвета: ink #161616, text #2B2B2B, muted #6B6B6B, line #E6E6E0,
   surface #F4F4EF, accent #5F6F26 (ссылки, кнопки), lime #E0FB52 (только маркеры). */
.kb, .kb * { box-sizing: border-box; }
.kb { --ink:#161616; --text:#2B2B2B; --muted:#6B6B6B; --line:#E6E6E0; --surface:#F4F4EF; --accent:#5F6F26; --accent-h:#4A571D; --lime:#E0FB52;
  font-family: 'Roboto', Arial, sans-serif; color: var(--text); font-size: 18px; line-height: 1.65; font-weight: 400; max-width: 720px; margin: 0 auto; -webkit-font-smoothing: antialiased; }
.kb p { margin: 0 0 16px; font-size: 18px; line-height: 1.65; color: var(--text); }
.kb strong { font-weight: 700; color: var(--ink); }
.kb a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color .2s; }
.kb a:hover { color: var(--accent-h); }
.kb h2 { font-family: inherit; font-size: 28px; line-height: 1.2; font-weight: 700; color: var(--ink); margin: 64px 0 16px; letter-spacing: -0.01em; scroll-margin-top: 24px; }
.kb h3 { font-family: inherit; font-size: 22px; line-height: 1.3; font-weight: 700; color: var(--ink); margin: 40px 0 12px; scroll-margin-top: 24px; }
.kb ul, .kb ol { margin: 0 0 24px; padding: 0; list-style: none; }
.kb li { position: relative; padding-left: 32px; margin: 0 0 12px; font-size: 18px; line-height: 1.6; color: var(--text); }
.kb ul > li::before { content: ''; position: absolute; left: 8px; top: 11px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.kb ol { counter-reset: kb; }
.kb ol > li { counter-increment: kb; }
.kb ol > li::before { content: counter(kb); position: absolute; left: 0; top: 2px; width: 24px; height: 24px; border-radius: 50%; background: var(--lime); color: var(--ink); font-size: 14px; line-height: 24px; font-weight: 700; text-align: center; }
.kb hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }
.kb code { font-family: 'Roboto Mono', Menlo, Consolas, monospace; font-size: 16px; background: var(--surface); padding: 2px 6px; border-radius: 6px; color: var(--ink); }
/* Лид и автор */
.kb-lead { font-size: 22px !important; line-height: 1.5 !important; color: var(--ink) !important; margin: 0 0 32px !important; }
.kb-author { display: flex; align-items: center; gap: 16px; padding: 24px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 0 0 32px; }
.kb-author__ava { flex: none; width: 48px; height: 48px; border-radius: 50%; background: var(--ink); color: var(--lime); font-weight: 700; font-size: 18px; display: flex; align-items: center; justify-content: center; }
.kb-author__name { font-size: 16px; font-weight: 500; color: var(--ink); line-height: 1.3; margin: 0 !important; }
.kb-author__role { font-size: 14px; color: var(--muted); line-height: 1.4; margin: 0 !important; }
/* Содержание */
.kb-toc { margin: 0 0 48px; }
.kb-toc__title { font-size: 16px !important; font-weight: 500; color: var(--muted) !important; margin: 0 0 12px !important; }
.kb-toc ul { margin: 0; }
.kb-toc li { margin: 0 0 8px; font-size: 18px; }
.kb-toc a { text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--line); transition: border-color .2s, color .2s; }
.kb-toc a:hover { color: var(--accent); border-color: var(--accent); }
/* Определение */
.kb-def { border-left: 3px solid var(--accent); padding: 4px 0 4px 24px; margin: 32px 0; }
.kb-def p { font-size: 20px; line-height: 1.55; color: var(--ink); margin: 0; }
/* Читайте также */
.kb-also { margin: 32px 0; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 18px; line-height: 1.5; }
.kb-also span { display: block; font-size: 14px; color: var(--muted); margin-bottom: 4px; }
.kb-also a { font-weight: 500; text-decoration: none; color: var(--ink); }
.kb-also a:hover { color: var(--accent); }
/* Таблица */
.kb-table { width: 100%; overflow-x: auto; margin: 24px 0 32px; }
.kb-table table { width: 100%; border-collapse: collapse; font-size: 16px; line-height: 1.5; }
.kb-table th { text-align: left; font-weight: 500; color: var(--muted); padding: 12px 16px 12px 0; border-bottom: 1px solid var(--ink); }
.kb-table td { padding: 16px 16px 16px 0; border-bottom: 1px solid var(--line); color: var(--text); vertical-align: top; }
.kb-table td:first-child { font-weight: 500; color: var(--ink); }
/* Код */
.kb-code { background: var(--ink); color: #EDEDE8; border-radius: 16px; padding: 24px; margin: 24px 0 32px; overflow-x: auto; font-family: 'Roboto Mono', Menlo, Consolas, monospace; font-size: 15px; line-height: 1.7; white-space: pre; }
.kb-code b { color: var(--lime); font-weight: 400; }
.kb-code i { color: #B9C98A; font-style: normal; }
/* Цифра-факт */
.kb-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 24px 0 32px; }
.kb-stat { background: var(--surface); border-radius: 16px; padding: 24px; }
.kb-stat__num { font-size: 28px; line-height: 1.15; font-weight: 700; color: var(--ink); margin: 0 0 8px !important; }
.kb-stat__txt { font-size: 14px !important; line-height: 1.45 !important; color: var(--muted) !important; margin: 0 !important; }
.kb-source { font-size: 14px !important; color: var(--muted) !important; margin: -16px 0 32px !important; }
/* Главное */
.kb-sum { background: var(--surface); border-radius: 24px; padding: 32px; margin: 48px 0; }
.kb-sum h2 { margin-top: 0 !important; font-size: 22px; }
.kb-sum ul { margin: 0; }
/* Мини-промо курса */
.kb-promo { display: flex; align-items: center; justify-content: space-between; gap: 24px; border: 1px solid var(--line); border-radius: 24px; padding: 24px; margin: 40px 0; }
.kb-promo__label { font-size: 14px !important; color: var(--muted) !important; margin: 0 0 4px !important; }
.kb-promo__title { font-size: 18px !important; font-weight: 700; color: var(--ink) !important; margin: 0 !important; line-height: 1.35 !important; }
.kb-btn { display: inline-flex; align-items: center; justify-content: center; flex: none; height: 48px; padding: 0 24px; border-radius: 24px; background: var(--accent); color: #fff !important; font-size: 16px; font-weight: 500; text-decoration: none !important; white-space: nowrap; transition: background-color .2s; }
.kb-btn:hover { background: var(--accent-h); }
.kb-btn--ghost { background: transparent; border: 1px solid rgba(255,255,255,.4); }
.kb-btn--ghost:hover { background: rgba(255,255,255,.08); }
/* Финальный курс */
.kb-course { background: var(--ink); border-radius: 24px; padding: 40px; margin: 64px 0 48px; color: #fff; }
.kb-course__tag { display: inline-block; font-size: 14px !important; line-height: 1 !important; font-weight: 500; color: var(--ink) !important; background: var(--lime); border-radius: 16px; padding: 8px 12px; margin: 0 0 24px !important; }
.kb-course__title { font-size: 28px !important; line-height: 1.2 !important; font-weight: 700; color: #fff !important; margin: 0 0 16px !important; }
.kb-course__text { font-size: 18px !important; color: rgba(255,255,255,.75) !important; margin: 0 0 24px !important; }
.kb-course ul { margin: 0 0 32px; }
.kb-course li { color: #fff; font-size: 16px; padding-left: 32px; }
.kb-course ul > li::before { background: none; width: 16px; height: 8px; top: 7px; left: 2px; border-left: 2px solid var(--lime); border-bottom: 2px solid var(--lime); border-radius: 0; transform: rotate(-45deg); }
.kb-course__btns { display: flex; flex-wrap: wrap; gap: 8px; }
/* Адаптив */
@media (max-width: 640px) {
  .kb, .kb p, .kb li { font-size: 17px; }
  .kb-lead { font-size: 19px !important; }
  .kb h2 { font-size: 24px; margin-top: 48px; }
  .kb h3 { font-size: 20px; }
  .kb-promo { flex-direction: column; align-items: flex-start; }
  .kb-course { padding: 32px 24px; }
  .kb-course__title { font-size: 24px !important; }
  .kb-btn { width: 100%; }
  .kb-sum { padding: 24px; }
}