:root {
  --bg: #f6f8f9;
  --card: #ffffff;
  --ink: #1f2a30;
  --muted: #5d6b73;
  --line: #e1e8ec;
  --accent: #2c6e8a;
  --accent-soft: #e5eff3;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.7;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding-top: 18px; padding-bottom: 18px; flex-wrap: wrap;
}
.brand {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-weight: 700; font-size: 20px; letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none;
}
.brand span { color: var(--accent); }
nav.main { display: flex; gap: 18px; flex-wrap: wrap; }
nav.main a {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px; color: var(--muted); text-decoration: none;
}
nav.main a:hover { color: var(--accent); }

.intro { padding: 48px 0 16px; }
.intro h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.01em; margin-bottom: 12px; }
.intro p { color: var(--muted); max-width: 600px; }

.list { display: grid; gap: 20px; padding: 24px 0 56px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 24px; text-decoration: none; color: inherit; display: block;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.tag {
  display: inline-block; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em;
  color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 3px 10px; margin-bottom: 10px;
}
.card h2 { font-size: 23px; line-height: 1.3; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 16px; }

article.post { padding: 40px 0 56px; }
article.post h1 { font-size: 32px; line-height: 1.25; letter-spacing: -0.01em; margin: 6px 0 10px; }
.meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px; color: var(--muted); padding-bottom: 20px; margin-bottom: 28px; border-bottom: 1px solid var(--line);
}
article.post h2 { font-size: 23px; margin: 32px 0 10px; }
article.post p, article.post li { margin-bottom: 14px; }
article.post ul { padding-left: 22px; margin-bottom: 14px; }
.box {
  background: var(--accent-soft); border-radius: 12px; padding: 18px 20px; margin: 28px 0;
  font-size: 16px;
}
.sources { font-size: 15px; color: var(--muted); }
.sources li { margin-bottom: 6px; }
.back { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 14px; text-decoration: none; }

footer.site {
  border-top: 1px solid var(--line); padding: 28px 0 40px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 13px; color: var(--muted);
}
footer.site .wrap { display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; }
footer.site a { color: var(--muted); }

@media (max-width: 520px) {
  body { font-size: 17px; }
  .intro h1 { font-size: 28px; }
  article.post h1 { font-size: 27px; }
}