/* Single column, mobile-first. System fonts only, no external assets.
   Brand: forest green #1f5c52, cream #f6f1e4, gold #e8b24a (matches the Facebook logo/cover). */
:root {
  --ink: #17332e;
  --muted: #55665f;
  --paper: #f6f1e4;
  --card: #fffdf7;
  --line: #e2d9c3;
  --accent: #1f5c52;
  --accent-ink: #f6f1e4;
  --gold: #c8901f;
  --serif: Georgia, "Times New Roman", serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f6f1e4;
    --muted: #b9c2b8;
    --paper: #13302b;
    --card: #1a3c36;
    --line: #2b524a;
    --accent: #e8b24a;
    --accent-ink: #13302b;
    --gold: #e8b24a;
  }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0 16px;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

a { color: var(--accent); }

.top { padding: 20px 0 4px; }
.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
}
.logo { flex: none; border-radius: 9px; }

h1 { font-family: var(--serif); font-size: 1.85rem; line-height: 1.2; margin: 28px 0 8px; }
h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 14px;
  border-radius: 2px;
  background: var(--gold);
}
h2 { font-family: var(--serif); font-size: 1.25rem; margin: 32px 0 8px; }

ol.steps {
  padding: 18px 20px 8px 2.6em;
  margin: 24px 0 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
ol.steps li::marker { color: var(--gold); font-weight: 700; }
ol.steps li, ul li { margin: 0 0 10px; }
ul.points { padding-left: 1.2em; font-weight: 600; }

.cta-wrap { margin: 28px 0; }
.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  max-width: 100%;
  padding: 12px 24px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  text-decoration: none;
}
.cta:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

.note { color: var(--muted); font-size: 0.95rem; }

footer {
  margin: 48px 0 0;
  padding: 16px 0 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
footer nav { display: flex; flex-wrap: wrap; gap: 4px 16px; }
footer nav a { display: inline-block; padding: 10px 0; }

@media (min-width: 40rem) {
  h1 { font-size: 2.3rem; }
}