:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --text: #1b1d22;
  --muted: #5f636d;
  --line: #e3e1da;
  --accent: #0f9d8a;
  --accent-ink: #0b7a6b;
  --glow: rgba(15, 157, 138, 0.18);
  --k-lists: #c2410c;
  --k-guides: #1d4ed8;
  --k-news: #be123c;
  --radius: 14px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a20;
    --text: #e8e9ec;
    --muted: #9aa0ab;
    --line: #262a33;
    --accent: #2dd4bf;
    --accent-ink: #5eead4;
    --glow: rgba(45, 212, 191, 0.22);
    --k-lists: #fb923c;
    --k-guides: #60a5fa;
    --k-news: #fb7185;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--font);
  text-rendering: optimizeLegibility;
}
a { color: var(--accent-ink); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; border-radius: 10px; }

.wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .bar { min-height: 60px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none; font-weight: 750; letter-spacing: -0.01em; font-size: 18px;
}
.brand-mark {
  width: 14px; height: 14px; transform: rotate(45deg); border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), #a7f3d0);
  box-shadow: 0 0 0 4px var(--glow), 0 0 18px var(--accent);
}
.site-header nav, .site-footer nav { display: flex; gap: 18px; }
.site-header nav a, .site-footer nav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.site-header nav a:hover, .site-footer nav a:hover { color: var(--text); }

main { padding-block: 40px 72px; }

.hero { padding: 48px 0 24px; max-width: 760px; }
.hero h1 { font-size: clamp(36px, 6vw, 60px); line-height: 1.05; letter-spacing: -0.03em; margin: 0 0 14px; }
.hero p { font-size: clamp(18px, 2.2vw, 21px); color: var(--muted); margin: 0; }
.empty { color: var(--muted); }

.block { margin-top: 44px; }
.block-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.block-head h2 { margin: 0; font-size: 22px; letter-spacing: -0.01em; }
.block-head a { font-weight: 600; font-size: 15px; text-decoration: none; }

.page-head { max-width: 720px; margin-bottom: 28px; }
.page-head h1 { font-size: clamp(32px, 5vw, 44px); letter-spacing: -0.02em; line-height: 1.1; margin: 4px 0 10px; }
.page-head p { color: var(--muted); margin: 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 20px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--text); text-decoration: none;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.card:hover { color: var(--text); transform: translateY(-2px); border-color: var(--accent); box-shadow: 0 8px 28px var(--glow); }
.card h3 { margin: 0; font-size: 19px; line-height: 1.3; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.5; }
.card time { margin-top: auto; padding-top: 6px; color: var(--muted); font-size: 13px; }

.kicker {
  font-size: 12px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-ink); margin: 0;
}
.k-lists { color: var(--k-lists); }
.k-guides { color: var(--k-guides); }
.k-news { color: var(--k-news); }

.post { max-width: 720px; margin-inline: auto; }
.crumbs { display: flex; gap: 8px; font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.post h1 { font-size: clamp(32px, 5.2vw, 46px); line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 14px; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; color: var(--muted); font-size: 14px; margin: 0 0 20px; }
.lede { font-size: 20px; line-height: 1.5; color: var(--muted); margin: 0 0 28px; }

.toc { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 16px 20px; margin: 0 0 32px; }
.toc p { margin: 0 0 6px; font-weight: 700; font-size: 14px; }
.toc ol { margin: 0; padding-left: 20px; font-size: 15px; }

.prose h2 { font-size: 26px; line-height: 1.25; letter-spacing: -0.015em; margin: 44px 0 12px; scroll-margin-top: 80px; }
.prose h3 { font-size: 20px; line-height: 1.3; margin: 30px 0 8px; scroll-margin-top: 80px; }
.prose h4 { font-size: 17px; margin: 24px 0 6px; }
.prose p, .prose ul, .prose ol { margin: 0 0 18px; }
.prose li { margin-bottom: 6px; }
.prose blockquote { margin: 24px 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--accent); color: var(--muted); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.prose code { font-family: var(--mono); font-size: .88em; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 1px 5px; }
.prose pre { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.prose pre code { border: 0; padding: 0; }
.table-wrap { overflow-x: auto; margin: 0 0 22px; border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface); font-weight: 700; }
tr:last-child td { border-bottom: 0; }

.sources { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; }
.sources h2 { font-size: 15px; margin: 0 0 8px; }
.sources ul { margin: 0; padding-left: 18px; color: var(--muted); }
.sources a { color: var(--muted); word-break: break-all; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.tags a { font-size: 13px; font-weight: 600; text-decoration: none; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.tags a:hover { border-color: var(--accent); color: var(--text); }

.related { max-width: 1080px; margin: 56px auto 0; }
.related h2 { font-size: 22px; margin: 0 0 16px; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.site-footer .bar { min-height: 72px; }
.site-footer p { margin: 0; }

@media (max-width: 560px) {
  body { font-size: 16.5px; }
  .site-header nav { gap: 14px; }
  main { padding-top: 24px; }
  .hero { padding-top: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
  .card:hover { transform: none; }
}