:root {
  --ink: #17221f;
  --muted: #5d6d68;
  --line: #dbe4df;
  --paper: #f6f8f5;
  --card: #ffffff;
  --accent: #1d7568;
  --accent-soft: #e4f1ec;
  --warm: #c86f42;
  --shadow: 0 18px 50px rgba(31, 57, 48, .08);
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: .08em; text-underline-offset: .18em; }
a:hover { color: #104e47; }

.site-header {
  background: rgba(246, 248, 245, .93);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
}

.nav-wrap, .container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { color: var(--ink); text-decoration: none; font-weight: 760; letter-spacing: -.03em; font-size: 1.05rem; }
.brand span { color: var(--accent); }

.site-nav { display: flex; align-items: center; gap: 22px; font-size: .95rem; }
.site-nav a { color: var(--ink); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }

main { min-height: calc(100vh - 160px); }

.hero { padding: 86px 0 64px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 52px; align-items: end; }
.eyebrow { margin: 0 0 14px; color: var(--accent); font-size: .78rem; font-weight: 780; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.035em; margin: 0 0 18px; }
h1 { font-size: clamp(2.55rem, 7vw, 5.4rem); max-width: 860px; }
h2 { font-size: clamp(1.8rem, 3.6vw, 3rem); }
h3 { font-size: 1.24rem; }
.lead { color: var(--muted); font-size: clamp(1.1rem, 2vw, 1.35rem); max-width: 720px; margin: 0; }
.hero-note { border-left: 3px solid var(--warm); padding: 16px 0 16px 22px; color: var(--muted); }
.hero-note strong { display: block; color: var(--ink); margin-bottom: 6px; }

.section { padding: 54px 0; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 24px; }
.section-head p { color: var(--muted); max-width: 650px; margin: 0; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 24px; box-shadow: var(--shadow); }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); margin: 0 0 16px; }
.card-link { font-weight: 700; }

.number { color: var(--warm); font-size: .78rem; font-weight: 780; letter-spacing: .1em; }
.tag { display: inline-flex; padding: 5px 10px; border-radius: 999px; color: var(--accent); background: var(--accent-soft); font-size: .8rem; font-weight: 700; margin: 0 6px 6px 0; }

.article-shell { padding: 48px 0 80px; }
.breadcrumbs { color: var(--muted); font-size: .9rem; margin-bottom: 38px; }
.breadcrumbs a { color: var(--muted); }
.article-head { max-width: 860px; margin-bottom: 34px; }
.article-head h1 { font-size: clamp(2.35rem, 5vw, 4.5rem); }
.article-meta { color: var(--muted); font-size: .92rem; }
.answer-box { background: var(--accent-soft); border: 1px solid #c9e5da; border-radius: 18px; padding: 24px 28px; margin: 30px 0 42px; }
.answer-box p { margin: 0; font-size: 1.08rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 62px; align-items: start; }
.article-body { min-width: 0; }
.article-body section { margin: 0 0 42px; }
.article-body p { font-size: 1.04rem; }
.article-body ul { padding-left: 1.2rem; }
.article-body li { margin: 8px 0; }
.side-box { position: sticky; top: 100px; border-top: 3px solid var(--accent); padding-top: 16px; }
.side-box h2 { font-size: 1.15rem; letter-spacing: -.02em; }
.side-box ul { list-style: none; padding: 0; margin: 0; }
.side-box li { margin: 10px 0; }
.warning { border: 1px solid #ecd5bd; background: #fff8ef; border-radius: 16px; padding: 20px 22px; }
.warning h2 { color: #9a522f; font-size: 1.2rem; }
.faq-item { border-top: 1px solid var(--line); padding: 20px 0; }
.faq-item h3 { margin-bottom: 8px; }
.faq-item p { margin: 0; }
.sources { font-size: .9rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 20px; }
.sources ul { padding-left: 1.1rem; }

.footer { border-top: 1px solid var(--line); padding: 30px 0 42px; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; }
.footer a { color: var(--muted); }

.search-line { display: flex; gap: 12px; margin: 24px 0 28px; }
.search-line input { flex: 1; border: 1px solid var(--line); border-radius: 12px; padding: 13px 15px; font: inherit; background: #fff; color: var(--ink); }
.empty { color: var(--muted); padding: 20px 0; }

@media (max-width: 820px) {
  .hero { padding: 60px 0 42px; }
  .hero-grid, .article-layout { grid-template-columns: 1fr; gap: 28px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .side-box { position: static; order: -1; }
  .site-nav { gap: 12px; font-size: .88rem; }
}

@media (max-width: 560px) {
  .nav-wrap, .container { width: min(calc(100% - 28px), var(--max)); }
  .nav-wrap { min-height: 64px; }
  .site-nav { gap: 10px; }
  .site-nav a:nth-child(3) { display: none; }
  .card-grid { grid-template-columns: 1fr; }
  .section { padding: 38px 0; }
  .article-shell { padding-top: 30px; }
  .footer-inner { flex-direction: column; }
}