* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #263746;
  line-height: 1.6;
}

.conteneur {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  background: #173b55;
  color: white;
}

header .conteneur {
  padding-top: 18px;
  padding-bottom: 18px;
}

.nom-site {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: bold;
  color: white;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

nav a {
  color: white;
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"] {
  text-decoration: underline;
}

main {
  padding-top: 48px !important;
  padding-bottom: 60px !important;
}

h1 {
  margin-bottom: 8px;
  color: #173b55;
}

.sous-titre {
  max-width: 700px;
  font-size: 19px;
  font-weight: bold;
}

section {
  margin-top: 42px;
}

h2 {
  color: #287782;
  border-bottom: 1px solid #d8e3e6;
  padding-bottom: 8px;
}

a {
  color: #176f7b;
}
.photo-profil {
  display: block;
  width: 170px;
  height: 170px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 0 24px;
}
.liens-profils {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 12px;
}

.liens-profils a {
  font-weight: bold;
}
.intro-centree {
  text-align: center;
}

.intro-centree .photo-profil {
  margin-left: auto;
  margin-right: auto;
}

.intro-centree .sous-titre {
  margin-left: auto;
  margin-right: auto;
}

.intro-centree .liens-profils {
  justify-content: center;
}
.titre-page {
  margin-top: 0;
  padding-bottom: 16px;
  font-size: 32px;
  color: #173b55;
  border-bottom: 2px solid #287782;
}

.reference {
  margin: 22px 0;
  padding: 22px 26px;
  background: #f5f8f9;
  border-left: 4px solid #287782;
  border-radius: 4px;
}

.reference h3 {
  margin: 4px 0 12px;
  color: #173b55;
  font-size: 20px;
}

.reference p {
  margin: 8px 0;
}

.type-reference {
  color: #287782;
  font-size: 14px;
  font-weight: bold;
}

.lien-reference {
  display: inline-block;
  margin-top: 10px;
  font-weight: bold;
}

.note-page {
  margin-top: 42px;
}
.reference li {
  margin-bottom: 7px;
}