:root {
  color-scheme: light;
  --article-bg: #f4f6fb;
  --article-ink: #121722;
  --article-muted: #626d7d;
  --article-line: rgba(18, 23, 34, 0.13);
  --article-accent: #8fff00;
  --article-dark: #121722;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--article-ink);
  background:
    radial-gradient(circle at 84% 0%, rgba(143, 255, 0, 0.22), transparent 26rem),
    var(--article-bg);
  font-size: 17px;
  line-height: 1.68;
}
a { color: inherit; }
button, input, textarea { font: inherit; }
.article-shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.article-nav {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.article-logo { font-size: 23px; font-weight: 750; letter-spacing: -0.05em; text-decoration: none; }
.article-nav__links { display: flex; align-items: center; gap: 20px; color: var(--article-muted); font-size: 14px; }
.article-nav__links a { text-decoration: none; }
.article-button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 19px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--article-dark);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.article-button:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(18, 23, 34, 0.16); }
.article-button--accent { background: var(--article-accent); color: var(--article-ink); }
.article-button--ghost { background: transparent; color: var(--article-ink); border-color: var(--article-line); }
.article-hero { padding: 72px 0 64px; max-width: 900px; }
.article-kicker { margin: 0 0 18px; color: #536073; font-size: 13px; font-weight: 750; letter-spacing: 0.13em; text-transform: uppercase; }
.article-hero h1 { max-width: 930px; margin: 0; font-size: clamp(42px, 6.8vw, 82px); line-height: 0.98; letter-spacing: -0.07em; }
.article-lead { max-width: 800px; margin: 25px 0 0; color: var(--article-muted); font-size: clamp(19px, 2.1vw, 25px); line-height: 1.42; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 24px; color: var(--article-muted); font-size: 14px; }
.article-layout { display: grid; grid-template-columns: minmax(180px, 0.35fr) minmax(0, 1fr); gap: 58px; align-items: start; padding: 52px 0 92px; border-top: 1px solid var(--article-line); }
.article-layout--single { grid-template-columns: minmax(0, 1fr); }
.article-toc { position: sticky; top: 24px; padding: 20px; border: 1px solid var(--article-line); border-radius: 20px; background: rgba(255,255,255,0.68); }
.article-toc strong { display: block; margin-bottom: 12px; font-size: 14px; }
.article-toc ol { margin: 0; padding-left: 20px; color: var(--article-muted); font-size: 14px; }
.article-toc li { margin: 8px 0; }
.article-toc a { text-decoration: none; }
.article-content { max-width: 770px; }
.article-content h2 { margin: 40px 0 12px; font-size: clamp(29px, 4vw, 46px); line-height: 1.05; letter-spacing: -0.05em; scroll-margin-top: 22px; }
.article-content h3 { margin: 28px 0 9px; font-size: 23px; line-height: 1.2; letter-spacing: -0.03em; }
.article-content p { margin: 0 0 17px; }
.article-content ul, .article-content ol { margin: 0 0 22px; padding-left: 25px; }
.article-content li { margin: 8px 0; }
.article-content a { text-decoration-thickness: 1px; text-underline-offset: 3px; }
.article-callout { margin: 0 0 28px; padding: 22px 24px; border-left: 4px solid var(--article-accent); border-radius: 0 16px 16px 0; background: #fff; }
.article-callout strong { display: block; margin-bottom: 5px; }
.article-table { width: 100%; margin: 22px 0 28px; border-collapse: collapse; font-size: 15px; background: #fff; }
.article-table th, .article-table td { padding: 13px 14px; border: 1px solid var(--article-line); text-align: left; vertical-align: top; }
.article-table th { background: #eef2f7; font-weight: 750; }
.article-cta { margin: 40px 0 0; padding: 25px; border-radius: 22px; background: var(--article-dark); color: #fff; }
.article-cta p { margin: 0 0 8px; color: rgba(255,255,255,0.68); font-size: 14px; }
.article-cta strong { display: block; margin-bottom: 17px; font-size: 25px; line-height: 1.15; letter-spacing: -0.03em; }
.article-faq { padding: 72px 0; border-top: 1px solid var(--article-line); }
.article-faq h2, .article-request h2 { margin: 0 0 26px; font-size: clamp(34px, 5vw, 58px); line-height: 1.02; letter-spacing: -0.06em; }
.article-faq details { padding: 17px 0; border-top: 1px solid var(--article-line); }
.article-faq details:last-child { border-bottom: 1px solid var(--article-line); }
.article-faq summary { cursor: pointer; font-weight: 750; }
.article-faq details p { max-width: 800px; margin: 12px 0 0; color: var(--article-muted); }
.article-request { padding: 82px 0; color: #fff; background: var(--article-dark); }
.article-request__grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 52px; align-items: start; }
.article-request__copy p { max-width: 560px; margin: 20px 0 0; color: rgba(255,255,255,0.68); }
.article-form { padding: 27px; border-radius: 23px; background: #fff; color: var(--article-ink); }
.article-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.article-form label { display: block; margin-bottom: 12px; }
.article-form label > span { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 700; }
.article-form input, .article-form textarea { width: 100%; min-height: 52px; padding: 13px 14px; border: 1px solid var(--article-line); border-radius: 12px; background: #f8f9fc; color: var(--article-ink); }
.article-form textarea { min-height: 120px; resize: vertical; }
.article-form__privacy { display: flex !important; gap: 9px; align-items: flex-start; color: var(--article-muted); font-size: 12px; }
.article-form__privacy input { width: 18px; min-height: 18px; margin-top: 2px; }
.article-form .form-status { margin-top: 14px; font-size: 14px; }
.article-form .form-status.is-success { color: #247400; }
.article-form .form-status.is-error { color: #b42318; }
.article-footer { padding: 31px 0; color: var(--article-muted); font-size: 14px; }
.article-footer__inner { display: flex; justify-content: space-between; gap: 20px; }
@media (max-width: 820px) {
  .article-layout, .article-request__grid { grid-template-columns: 1fr; }
  .article-toc { position: static; max-width: 560px; }
}
@media (max-width: 560px) {
  .article-shell { width: min(100% - 24px, 1120px); }
  .article-nav { min-height: 72px; }
  .article-nav__links a:not(.article-button) { display: none; }
  .article-nav .article-button { min-height: 42px; padding: 9px 14px; font-size: 13px; }
  .article-hero { padding: 54px 0 58px; }
  .article-hero h1 { font-size: clamp(42px, 13.5vw, 65px); }
  .article-layout, .article-faq, .article-request { padding: 62px 0; }
  .article-form__row { grid-template-columns: 1fr; }
  .article-footer__inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .article-button { transition: none; }
}