:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5b6475;
  --paper: #f7f8fb;
  --panel: #ffffff;
  --line: #e2e6ee;
  --accent: #3157c8;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main { width: min(860px, calc(100% - 36px)); margin: 56px auto; }
header { margin-bottom: 28px; }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.12; margin: 10px 0 14px; letter-spacing: -.04em; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 700px; }
article { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: clamp(22px, 5vw, 38px); box-shadow: 0 12px 36px rgba(20, 32, 55, .05); }
h2 { font-size: 1.25rem; margin: 28px 0 8px; }
h2:first-child { margin-top: 0; }
p, li { color: #30394b; }
a { color: var(--accent); }
nav { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 26px; }
nav a { font-weight: 650; text-decoration: none; }
footer { color: var(--muted); font-size: .9rem; margin: 24px 4px; }
.notice { border-left: 3px solid var(--accent); padding: 10px 16px; background: #eef2ff; border-radius: 0 10px 10px 0; }