:root {
  --paper: #f3f4f7;
  --ink: #16181d;
  --muted: #6d7280;
  --line: #e7e9ef;
  --card: #ffffff;
  --serif: Fraunces, Georgia, "Times New Roman", serif;
  --sans: Outfit, "Segoe UI", sans-serif;
}
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  background:
    radial-gradient(880px 420px at -8% -20%, rgba(47, 111, 237, 0.10), transparent 58%),
    var(--paper);
}
.brand { color: inherit; font-family: var(--serif); font-weight: 560; text-decoration: none; font-size: 26px; letter-spacing: -0.03em; }
.doc-top, footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 22px 8vw;
}
nav { display: flex; gap: 18px; font-size: 14px; }
nav a, footer a { color: var(--muted); text-decoration: none; }
nav a:hover, footer a:hover, article a, aside a { color: var(--ink); }
article, aside {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 24px 28px;
}
article, .guide-wrap {
  background: var(--card);
  border: 1px solid rgba(22, 24, 29, 0.06);
  border-radius: 24px;
  box-shadow: 0 1px 2px rgba(22, 24, 29, 0.04), 0 18px 44px rgba(22, 24, 29, 0.06);
}
h1 { font-family: var(--serif); font-size: 44px; letter-spacing: -0.03em; line-height: 1.08; margin: 0 0 10px; font-weight: 560; }
h2 { font-size: 22px; margin-top: 1.5em; letter-spacing: -0.02em; }
p, li { font-size: 17px; line-height: 1.6; }
.eyebrow { letter-spacing: 0.14em; text-transform: uppercase; font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.dek { color: #3c4150; }
a { color: #1d4e89; }
.guide-list, aside ul { list-style: none; padding: 0; }
.guide-list a, aside a { display: block; text-decoration: none; padding: 14px 0; border-top: 1px solid var(--line); }
.guide-list strong { display: block; color: var(--ink); font-size: 18px; }
.guide-list span { display: block; color: var(--muted); font-size: 14px; margin-top: 4px; }
footer { font-size: 14px; }
@media (max-width: 720px) {
  h1 { font-size: 34px; }
  .doc-top, footer { padding-inline: 20px; }
}