:root {
  --paper: #f6f8fc; --sheet: #ffffff; --ink: #15203a; --muted: #5b6579; --line: #d7deeb;
  --grid: rgba(35, 70, 216, 0.07); --accent: #2346d8;
  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #0d1322; --sheet: #131b2e; --ink: #e5e9f3; --muted: #9aa4b9; --line: #26314a;
    --grid: rgba(124, 152, 255, 0.07); --accent: #7f9bff; color-scheme: dark; }
}
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--ink); font: 400 17px/1.6 var(--font-body);
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
article { background: var(--sheet); border: 1px solid var(--line); border-radius: 8px; padding: 24px clamp(16px, 4vw, 36px); }
a { color: var(--accent); }
.back { display: inline-block; margin-bottom: 16px; font-weight: 600; text-decoration: none; }
h1, h2 { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.01em; line-height: 1.1; text-wrap: balance; }
h1 { font-size: 40px; margin: 0 0 4px; }
h2 { font-size: 24px; margin: 28px 0 8px; }
.meta { color: var(--muted); margin: 0 0 8px; }
ul { padding-left: 1.2em; }
li + li { margin-top: 4px; }