/* ============================================================
   blog/style.css — Immersio Learning · Le Blog
   Hérite des variables Immersio via ../css/mydesign_optimized.css
   Police : Montserrat (titres) · Open Sans (corps)
   Version : Juin 2026 — post-audit
   ============================================================ */

/* ── Variables locales (fallback si CSS parent absent) ───── */
:root {
  --il-navy:      #1A2B5F;
  --il-blue:      #2D6BE4;
  --il-gold:      #F0A500;
  --il-dark:      #1a1a2e;
  --il-light:     #F4F6FB;
  --il-text:      #1E1E2E;
  --il-muted:     #5A6478;
  --card-radius:  12px;
  --transition:   .28s cubic-bezier(.2,.9,.3,1);
}

/* ── Base ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Open Sans', system-ui, -apple-system, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--il-text);
  background: var(--il-light);
  -webkit-font-smoothing: antialiased;
}

/* ── Typographie ─────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', 'Open Sans', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--il-navy);
}
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.35rem); font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; color: var(--il-navy); }
h5 { font-size: .95rem; font-weight: 600; }

/* Article body typography */
.article-body p   { margin-bottom: 1.1rem; color: var(--il-text); }
.article-body h4  { margin-top: 1.75rem; margin-bottom: .6rem; }
.article-body ul,
.article-body ol  { padding-left: 1.4rem; margin-bottom: 1rem; }
.article-body li  { margin-bottom: .4rem; }
.article-body .lead {
  font-size: 1.08rem;
  color: var(--il-navy);
  font-weight: 600;
  line-height: 1.6;
  border-left: 4px solid var(--il-gold);
  padding-left: 1rem;
  margin-bottom: 1.5rem;
}
.article-body blockquote {
  border-left: 4px solid var(--il-blue);
  padding: .75rem 1.25rem;
  background: rgba(45,107,228,.06);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  margin: 1.5rem 0;
}

/* ── Navbar Blog ─────────────────────────────────────────── */
#mainNav {
  background: var(--il-navy) !important;
  padding-top: .65rem;
  padding-bottom: .65rem;
  transition: padding var(--transition), box-shadow var(--transition);
}
#mainNav.shrink {
  padding-top: .2rem;
  padding-bottom: .2rem;
  box-shadow: 0 6px 20px rgba(0,0,0,.22);
}
#mainNav .navbar-brand {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .01em;
}
#mainNav .nav-link {
  font-family: 'Montserrat', sans-serif;
  font-size: .85rem;
  font-weight: 600;
  color: rgba(255,255,255,.82) !important;
  padding: .35rem .7rem;
  transition: color .2s;
}
#mainNav .nav-link:hover { color: var(--il-gold) !important; }

/* ── Section "En Bref" ───────────────────────────────────── */
#en-bref {
  background: #fff;
  border-radius: var(--card-radius);
  padding: 3rem 0;
}
#en-bref .section-label {
  font-family: 'Montserrat', sans-serif;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--il-gold);
  margin-bottom: .25rem;
}

/* ── Cards "En Bref" ─────────────────────────────────────── */
.card {
  border: 1px solid rgba(0,0,0,.07);
  border-radius: var(--card-radius);
  overflow: hidden;
  background: #fff;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(26,43,95,.10);
}
.card-img-top {
  height: 180px;
  object-fit: cover;
}
.card-title {
  font-family: 'Montserrat', sans-serif;
  font-size: .92rem;
  font-weight: 700;
  color: var(--il-navy);
  line-height: 1.35;
}
.card-text {
  font-size: .88rem;
  color: var(--il-muted);
  line-height: 1.55;
}

/* Badge catégorie */
.badge-categorie {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  background: var(--il-light);
  color: var(--il-blue);
  border: 1px solid rgba(45,107,228,.2);
  border-radius: 100px;
  padding: .18rem .7rem;
  margin-bottom: .5rem;
}

/* Lien de carte entier cliquable */
.card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}
.card-link:hover { color: inherit; }

/* ── Section "En savoir plus" (articles longs) ───────────── */
#en-savoir-plus {
  padding: 3rem 0 4rem;
}
#en-savoir-plus > .container > h2 {
  margin-bottom: 3rem;
}

/* Carte article long */
.article-card {
  border-radius: var(--card-radius);
  border: none;
  box-shadow: 0 4px 24px rgba(26,43,95,.08);
}
.article-card .card-img-top {
  height: 280px;
  object-fit: cover;
}
.article-card .card-body {
  padding: 2rem;
}

/* Séparateur articles */
.article-separator {
  border: none;
  border-top: 2px solid var(--il-light);
  margin: 3rem 0;
}

/* Scroll-reveal */
.slide-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .5s ease, transform .5s ease;
}
.slide-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Carte auteur ────────────────────────────────────────── */
.author-card {
  background: #fff;
  border-radius: var(--card-radius);
  border: none;
  box-shadow: 0 4px 24px rgba(26,43,95,.08);
  padding: 1.75rem;
  position: sticky;
  top: 88px; /* colle sous la navbar fixe */
}
.author-card h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--il-navy);
  margin-bottom: .75rem;
}
.author-card p {
  font-size: .88rem;
  color: var(--il-muted);
  line-height: 1.6;
}
.author-card .btn {
  font-family: 'Montserrat', sans-serif;
  font-size: .82rem;
  font-weight: 700;
  border-radius: 8px;
  padding: .55rem 1rem;
  transition: all .2s;
}
.author-card .btn-primary {
  background: var(--il-blue);
  border-color: var(--il-blue);
  color: #fff;
}
.author-card .btn-primary:hover {
  background: #1d58cc;
  border-color: #1d58cc;
  transform: translateY(-1px);
}
.author-card .btn-outline-primary {
  color: var(--il-blue);
  border-color: var(--il-blue);
}
.author-card .btn-outline-primary:hover {
  background: var(--il-blue);
  color: #fff;
}

/* Devise dorée dans la carte auteur */
.author-devise {
  font-style: italic;
  font-size: .8rem;
  color: var(--il-gold);
  border-top: 1px solid var(--il-light);
  padding-top: .75rem;
  margin-top: .75rem;
}

/* ── Section titres (catégories) ─────────────────────────── */
.section-cat-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--il-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.5rem;
}
.section-cat-title::after {
  content: '';
  flex: 1;
  height: 2px;
  background: var(--il-light);
  border-radius: 1px;
}

/* ── Gold divider ────────────────────────────────────────── */
.gold-divider {
  width: 48px;
  height: 4px;
  background: var(--il-gold);
  border-radius: 2px;
  margin: .5rem auto 2rem;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  background: var(--il-dark);
  font-size: .88rem;
  color: rgba(255,255,255,.72);
}
footer a {
  color: rgba(255,255,255,.6);
  text-decoration: none;
  transition: color .2s;
}
footer a:hover { color: var(--il-gold); }
footer .footer-devise {
  font-size: .78rem;
  color: var(--il-gold);
  font-style: italic;
}
footer .bi { font-size: 1.25rem; transition: color .2s; }
footer a:hover .bi { color: var(--il-gold); }

/* ── Accessibilité ───────────────────────────────────────── */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--il-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 991px) {
  .author-card { position: static; margin-top: 2rem; }
  .article-card .card-img-top { height: 220px; }
}
@media (max-width: 767px) {
  .card-img-top { height: 150px; }
  .article-card .card-img-top { height: 180px; }
  .article-card .card-body { padding: 1.25rem; }
  #en-bref, #en-savoir-plus { padding: 2rem 0; }
}

/* ── Scroll smooth ───────────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}