/* ====== Style général ====== */
body {
  font-family: 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  font-size: 17px;
  color: #333;
  background-color: #ffffff;
  padding-bottom: 30px;
}

/* ====== Titres ====== */
h1, h2, h3, h4, h5 {
  color: #1a73e8; /* bleu moderne */
  font-weight: 600;
}

/* ====== Liens ====== */
a {
  color: #1a73e8;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ====== Table des matières (sidebar) ====== */
.book .book-summary {
  background: #f5f9ff;
  border-right: 1px solid #dbe8fd;
}
.book .book-summary ul.summary li a {
  color: #1a73e8;
}
.book .book-summary ul.summary li.active > a {
  background-color: #dbe8fd;
  font-weight: bold;
  color: #1a73e8;
}

/* ====== Barre supérieure ====== */
.book .book-header {
  background-color: #1a73e8;
  color: white;
  border-bottom: none;
}
.book .book-header .btn {
  color: white;
}
.book .book-header .btn:hover {
  background-color: #145ab4;
}

/* ====== Encadrés (informations, astuces) ====== */
.book .book-body .page-wrapper .page-inner blockquote {
  background: #eaf3ff;
  border-left: 4px solid #1a73e8;
  padding: 10px 15px;
  font-style: italic;
}

/* ====== Code ====== */
pre {
  background: #f3f3f3;
  padding: 12px;
  border-radius: 4px;
  overflow-x: auto;
}
code {
  background: #f0f0f0;
  padding: 2px 4px;
  border-radius: 3px;
}

/* ====== Tableaux ====== */
table {
  border-collapse: collapse;
  width: 100%;
}
table th, table td {
  border: 1px solid #ccc;
  padding: 8px;
}
table th {
  background-color: #f5f9ff;
  color: #1a73e8;
}
/* ===== Police et lisibilité ===== */
body {
  font-family: "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  font-size: 17px;
  color: #2c2c2c;
  background: #ffffff;
}

/* ===== Titres ===== */
h1, h2, h3 {
  color: #2166d1;
  font-weight: 600;
}

/* ===== Table des matières (sidebar) ===== */
.book .book-summary {
  background-color: #f0f4ff;
  border-right: 1px solid #d0def7;
}
.book .book-summary a {
  color: #2166d1;
}
.book .book-summary a:hover {
  text-decoration: underline;
}
.book .book-summary .active > a {
  background-color: #d0def7;
  color: #2166d1;
  font-weight: bold;
}

/* ===== En-tête (header bar) ===== */
.book .book-header {
  background-color: #2166d1;
  color: white;
}
.book .book-header .btn {
  color: white;
}
.book .book-header .btn:hover {
  background-color: #1b4ea0;
}

/* ===== Encadrés de citation ===== */
blockquote {
  background: #e8f0fe;
  border-left: 5px solid #2166d1;
  padding: 10px 15px;
  font-style: italic;
}

/* ===== Code et blocs R ===== */
pre {
  background-color: #f6f6f6;
  padding: 10px;
  border-radius: 5px;
  overflow-x: auto;
}
code {
  background-color: #f0f0f0;
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 90%;
}

/* ===== Tableaux ===== */
table {
  border-collapse: collapse;
  width: 100%;
}
th {
  background-color: #d0def7;
  color: #1b4ea0;
  padding: 8px;
}
td {
  border: 1px solid #ccc;
  padding: 8px;
}

/* ===== Liens ===== */
a {
  color: #2166d1;
}
a:hover {
  color: #1742a6;
  text-decoration: underline;
}
.book .book-header .btn {
  color: white !important;
  opacity: 1 !important;
}

.book .book-header .btn:hover {
  background-color: #1742a6;
  opacity: 1;
}
.book .book-header h1 {
  color: white;
}

/* ===== En-tête (Header bar) ===== */
.book .book-header {
  background-color: #2166d1 !important; /* bleu moderne */
  color: white !important;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.book .book-header .btn,
.book .book-header .toggle-nav,
.book .book-header h1,
.book .book-header .dropdown-toggle {
  color: white !important;
  opacity: 1 !important;
  visibility: visible !important;
  text-shadow: none !important;
}

/* Empêche la disparition au survol */
.book .book-header .btn:hover {
  background-color: #1742a6 !important;
  color: white !important;
  opacity: 1 !important;
}

/* === Hover sur les liens du sommaire (table des matières) === */
.book .book-summary ul.summary li a:hover {
  background-color: #d0def7; /* Couleur bleu clair au survol */
  color: #1742a6;             /* Texte bleu foncé */
  text-decoration: none;
  border-radius: 4px;
  padding-left: 10px;
  transition: background-color 0.3s, color 0.3s;
}

.book .book-summary ul.summary li.active > a {
  background-color: #2166d1;
  color: white;
  font-weight: bold;
  border-radius: 4px;
}

/* === Style personnalisé pour les titres de paragraphe (##) === */
.book .book-body h2 {
  border-left: 4px solid #a0d6b4; /* couleur verte pâle */
  padding-left: 10px;
  margin-top: 2em;
  margin-bottom: 1em;
  color: #0077cc;
  font-weight: 600;
  background-color: #ffffff;
  box-shadow: 0px 2px 2px rgba(0,0,0,0.03);
  transition: all 0.3s ease;
}