:root {
  color-scheme: light dark;
  --fond: #fafaf9;
  --texte: #1c1917;
  --discret: #57534e;
  --bordure: #e7e5e4;
  --carte: #ffffff;
  --lien: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fond: #0c0a09;
    --texte: #f5f5f4;
    --discret: #a8a29e;
    --bordure: #292524;
    --carte: #1c1917;
    --lien: #93c5fd;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0 auto;
  max-width: 44rem;
  padding: 0 1.25rem;
  background: var(--fond);
  color: var(--texte);
  font: 1rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.2rem;
  margin: 2.5rem 0 0.75rem;
}

h3 {
  font-size: 1.1rem;
  margin: 0 0 0.25rem;
}

p {
  margin: 0 0 0.75rem;
}

.discret {
  color: var(--discret);
  font-size: 0.9rem;
}

.entete {
  padding: 1.5rem 0 2.5rem;
}

.marque {
  color: var(--texte);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}

.intro p {
  color: var(--discret);
  font-size: 1.1rem;
}

.app {
  display: flex;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--carte);
  border: 1px solid var(--bordure);
  border-radius: 1rem;
}

.app-icone {
  flex: none;
  border-radius: 0.9rem;
}

.app-texte p:last-child {
  margin-bottom: 0;
}

.liens {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.pied {
  display: flex;
  gap: 1.25rem;
  margin-top: 3rem;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--bordure);
  color: var(--discret);
  font-size: 0.9rem;
}

@media (max-width: 30rem) {
  h1 {
    font-size: 1.5rem;
  }

  .app {
    flex-direction: column;
  }
}