:root {
  --fond: #f4f8f7;
  --encre: #1f2d33;
  --encre-douce: #4a5b62;
  --accent: #2b6a70;
  --accent-fonce: #1d4d52;
  --filet: #d3e0de;
  --carte: #ffffff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--fond);
  color: var(--encre);
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.7;
}

a { color: var(--accent); }
a:hover { color: var(--accent-fonce); }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.entete {
  border-bottom: 1px solid var(--filet);
  background: var(--carte);
}
.entete-contenu {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.marque {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--encre);
  text-decoration: none;
}
.entete nav a {
  font-size: 0.95rem;
  margin-left: 1rem;
  text-decoration: none;
}
.entete nav a:hover { text-decoration: underline; }

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}

h1, h2, h3 {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  line-height: 1.25;
  color: var(--encre);
}
h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); margin: 0 0 0.5rem; }
h2 { font-size: 1.55rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 1.5rem 0 0.25rem; }

.sous-titre {
  font-size: 1.1rem;
  color: var(--encre-douce);
  margin: 0 0 0.5rem;
}
.meta {
  font-size: 0.9rem;
  color: var(--encre-douce);
  margin: 0 0 2rem;
}

p { margin: 0 0 1rem; }

.auteur {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0.5rem 0 1.25rem;
}
.auteur img {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  object-position: 60% 35%;
  flex-shrink: 0;
  border: 3px solid var(--carte);
  box-shadow: 0 0 0 1px var(--filet);
}
.auteur .meta { margin: 0; font-size: 1rem; }

.bouton {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.8rem 1.4rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
}
.bouton:hover { background: var(--accent-fonce); color: #fff; }

.encadre {
  background: var(--carte);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.etapes h3 { margin-top: 1.25rem; }

ul.liste { padding-left: 1.25rem; }
ul.liste li { margin-bottom: 0.4rem; }

.final {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--filet);
}
.final h2 { margin-top: 0; }

/* Page d'accueil du blog */
.liste-articles { list-style: none; padding: 0; margin: 2rem 0 0; }
.liste-articles li {
  background: var(--carte);
  border: 1px solid var(--filet);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}
.liste-articles h2 { margin: 0 0 0.25rem; font-size: 1.3rem; }
.liste-articles h2 a { text-decoration: none; }
.liste-articles h2 a:hover { text-decoration: underline; }
.liste-articles p { margin: 0; color: var(--encre-douce); }
.liste-articles .meta { margin: 0 0 0.5rem; }

.pied {
  border-top: 1px solid var(--filet);
  padding: 1.5rem 1.25rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--encre-douce);
}
.pied p { margin: 0.25rem 0; }