:root {
  --encre: #1c2530; --doux: #5a6673; --trait: #e3e7ec;
  --fond: #fbfcfd; --accent: #1d6fa5;
}
@media (prefers-color-scheme: dark) {
  :root { --encre: #e8ecf1; --doux: #9aa6b4; --trait: #2a3440; --fond: #131922; --accent: #6db3e2; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--fond); color: var(--encre);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.page { max-width: 44rem; margin: 0 auto; padding: 3.5rem 1.5rem 5rem; }
header { border-bottom: 1px solid var(--trait); padding-bottom: 1.5rem; margin-bottom: 2.5rem; }
.marque { font-weight: 600; letter-spacing: -0.01em; }
.marque span { color: var(--doux); font-weight: 400; }
h1 { font-size: 1.75rem; line-height: 1.25; letter-spacing: -0.02em; margin: 0 0 0.5rem; }
h2 { font-size: 1.1rem; margin: 2.5rem 0 0.75rem; letter-spacing: -0.01em; }
p, li { color: var(--encre); }
.chapo { color: var(--doux); font-size: 1.05rem; margin-top: 0; }
ul { padding-left: 1.2rem; }
li { margin: 0.35rem 0; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
nav { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 0.9rem; }
footer {
  margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--trait);
  color: var(--doux); font-size: 0.875rem;
}
.encadre {
  border-left: 3px solid var(--accent); padding: 0.1rem 0 0.1rem 1rem;
  margin: 1.5rem 0; color: var(--doux);
}