:root {
  --ink: #1c2530;
  --muted: #566173;
  --paper: #f7f8fa;
  --surface: #ffffff;
  --line: #d7dde5;
  --accent: #2d5a87;
  --accent-dark: #1f4266;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-dark); }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }

header.site {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.brand { font-weight: 600; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
nav a { margin-left: 1.25rem; font-size: 0.975rem; }
nav a:first-child { margin-left: 0; }

main { padding: 3rem 0 4rem; }

h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}
h2 {
  font-size: 1.4rem;
  line-height: 1.3;
  font-weight: 600;
  margin: 3rem 0 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
h3 { font-size: 1.1rem; font-weight: 600; margin: 1.75rem 0 0.35rem; }
p { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; margin: 0 0 1rem; }
li { margin-bottom: 0.4rem; }

.lede { font-size: 1.2rem; color: var(--muted); max-width: 38rem; }
.meta { color: var(--muted); font-size: 0.95rem; }

.notice {
  background: var(--surface);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.notice p:last-child { margin-bottom: 0; }

footer.site {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}
footer.site p { margin: 0 0 0.35rem; }
footer.site a { margin-right: 1rem; }