/* =========================================================
   Bibliothèque logicielle — styles spécifiques
   ========================================================= */

/* Navigation catégories sticky */
.biblio-nav {
  position: sticky;
  top: 64px;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding: .9rem 0;
}
.biblio-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  list-style: none;
  justify-content: center;
}
.biblio-nav a {
  display: inline-flex;
  align-items: center;
  padding: .5rem 1rem;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: .85rem;
  color: var(--ink);
  transition: var(--transition);
  white-space: nowrap;
}
.biblio-nav a:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
  transform: translateY(-2px);
}

/* Section principale */
.biblio-section { padding: 5rem 0; scroll-margin-top: 130px; }

.biblio-head {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  max-width: 880px;
}
.cat-emoji {
  font-size: 2.2rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: .2rem;
}
.biblio-head h2 {
  margin-bottom: .35rem;
  font-size: clamp(1.45rem, 2.6vw, 1.9rem);
}
.biblio-head p {
  font-size: 1rem;
  color: var(--ink-soft);
}

/* Grille de logiciels */
.biblio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.biblio-card {
  display: block;
  padding: 1.1rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--ink);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.section-alt .biblio-card { background: var(--bg); }

.biblio-card::after {
  content: '↗';
  position: absolute;
  top: 1.1rem; right: 1.1rem;
  font-size: 1rem;
  color: var(--ink-mute);
  transition: transform .25s, color .25s;
  opacity: .6;
}
.biblio-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.biblio-card:hover::after {
  transform: translate(2px, -2px);
  color: var(--primary);
  opacity: 1;
}
.biblio-card strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: .35rem;
  padding-right: 1.5rem;
}
.biblio-card small {
  font-size: .82rem;
  color: var(--ink-soft);
  line-height: 1.45;
}

@media (max-width: 540px) {
  .biblio-nav { top: 56px; padding: .65rem 0; }
  .biblio-nav a { font-size: .78rem; padding: .4rem .8rem; }
  .biblio-head { flex-direction: column; gap: .5rem; }
  .biblio-grid { grid-template-columns: 1fr; }
}