:root {
  --ink: #0f1720;
  --muted: #5a6570;
  --paper: #f7f8fa;
  --panel: #ffffff;
  --accent: #0b6e4f;
  --accent-ink: #ffffff;
  --line: #d9dee5;
  --warn: #8a4b12;
  font-family: "Source Serif 4", "Libre Baskerville", "Georgia", serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #e8eef2 0%, var(--paper) 28%, #f3f5f7 100%);
}
.hero, main, footer {
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
}
.hero { padding: 3.75rem 0 1.75rem; }
.brand {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 1rem;
  font-weight: 700;
}
h1 {
  font-size: clamp(2.1rem, 5vw, 3.35rem);
  line-height: 1.05;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.lede {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 1.08rem;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
}
.hero-note {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 0.82rem;
  color: var(--muted);
  margin: 1.25rem 0 0;
}
.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}
.cta a, a.text-link {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  text-decoration: none;
  font-weight: 650;
}
.cta a {
  padding: 0.8rem 1.15rem;
  border-radius: 8px;
}
.primary { background: var(--accent); color: var(--accent-ink); }
.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.text-link { color: var(--accent); }
section { padding: 1.35rem 0 0.4rem; }
h2 {
  font-size: 1.35rem;
  margin: 0 0 0.65rem;
}
section p, .steps, .plain {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--muted);
  line-height: 1.55;
}
.steps, .plain {
  margin: 0;
  padding-left: 1.2rem;
}
.steps li, .plain li { margin: 0.45rem 0; }
.plain { list-style: disc; }
a { color: var(--accent); }
.sources {
  margin-top: 1.5rem;
  padding: 1.1rem 1.15rem 1.25rem;
  border-top: 1px solid var(--line);
  background: var(--panel);
}
.pill {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.12rem 0.5rem;
  border-radius: 4px;
  background: #e7f3ee;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 650;
  vertical-align: middle;
}
.obs {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 0.8rem;
  color: var(--muted);
}
footer {
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 0.9rem;
}
footer .obs { margin-top: 0.75rem; }
@media (max-width: 640px) {
  .hero { padding-top: 2.75rem; }
}