/* SetGo — site vitrine. CSS unique, sans JavaScript. */
:root {
  --fond: #ffffff;
  --fond-doux: #f5f7fa;
  --texte: #14202b;
  --texte-doux: #4d5f70;
  --trait: #dfe5ec;
  --accent: #0f6ea8;
  --accent-clair: #e6f1f8;
  --largeur: 44rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fond: #0e161d;
    --fond-doux: #16212b;
    --texte: #e8eef4;
    --texte-doux: #a3b2c0;
    --trait: #26343f;
    --accent: #5cb3e0;
    --accent-clair: #16212b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--fond);
  color: var(--texte);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

.enveloppe {
  max-width: var(--largeur);
  margin: 0 auto;
  padding: 0 1.25rem;
}

header.bandeau {
  border-bottom: 1px solid var(--trait);
  padding: 1.25rem 0;
}
header.bandeau .enveloppe {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
}
.marque {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--texte);
  text-decoration: none;
}
.marque span { color: var(--accent); }
nav a {
  color: var(--texte-doux);
  text-decoration: none;
  font-size: 0.95rem;
}
nav a:hover, nav a:focus { color: var(--accent); text-decoration: underline; }

main { padding: 3rem 0 4rem; }

h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}
h2 {
  font-size: 1.15rem;
  margin: 2.25rem 0 0.5rem;
  letter-spacing: -0.01em;
}
.chapeau {
  font-size: 1.1rem;
  color: var(--texte-doux);
  margin: 0 0 2rem;
}
p { margin: 0 0 1rem; }
ul { margin: 0 0 1rem; padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }
a { color: var(--accent); }

.encadre {
  background: var(--fond-doux);
  border: 1px solid var(--trait);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.encadre p:last-child { margin-bottom: 0; }
.etiquette {
  display: inline-block;
  background: var(--accent-clair);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

dl { margin: 0; }
dt { font-weight: 600; margin-top: 1rem; }
dd { margin: 0.15rem 0 0; color: var(--texte-doux); }

footer {
  border-top: 1px solid var(--trait);
  padding: 1.75rem 0 2.5rem;
  color: var(--texte-doux);
  font-size: 0.9rem;
}
footer .enveloppe {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  justify-content: space-between;
}
footer a { color: var(--texte-doux); }

.maj { font-size: 0.9rem; color: var(--texte-doux); margin-bottom: 2rem; }

@media (max-width: 30rem) {
  body { font-size: 16px; }
  main { padding: 2rem 0 3rem; }
}