/* ================================================
   PAGE D'ACCUEIL — GRILLE DE VIGNETTES
   ================================================ */

/* Grille principale — 4 colonnes égales */
.grille {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 6px;
  padding: 6px;
  width: 100%;
}

/* Colonnes GV — deux grandes vignettes empilées */
.colonne-gv {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Colonnes centrales — six petites vignettes empilées */
.colonne-centrale {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ---- GRANDES VIGNETTES ---- */

.grande-vignette {
  flex: 1;
  min-height: 200px;
  position: relative;
  overflow: hidden;
  border: 5px solid var(--blanc);
  display: block;
  text-decoration: none;
  cursor: pointer;
}

/* Image de fond — cachée par défaut */
.gv-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 0.5s ease-in;
}

/* Image révélée au survol */
.grande-vignette:hover .gv-image {
  opacity: 1;
}

/* Contenu texte — s'estompe au survol */
.gv-contenu {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  opacity: 1;
  transition: opacity 0.5s;
}

.grande-vignette:hover .gv-contenu {
  opacity: 0.15;
}

.gv-titre {
  font-size: 1.5em;
  font-weight: bold;
  color: var(--blanc);
  text-align: center;
  text-shadow: 1px 1px 1px var(--noir);
}

.gv-titre.lchan {
  font-family: var(--police-lchan);
}

.gv-titre.chomsky {
  font-family: var(--police-chomsky);
  font-size: 2em;
}

.gv-separateur {
  display: block;
  width: 60%;
  height: 2px;
  background: var(--blanc-doux);
}

/* Carousel vertical CSS pur */
.gv-carousel {
  position: relative;
  width: 100%;
  height: 60px;
  overflow: hidden;
  text-align: center;
}

.gv-slides {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

.gv-slides span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  font-weight: 700;
  color: var(--blanc);
  font-size: 0.9em;
  line-height: 1.3;
  text-align: center;
  text-shadow: 1px 1px 1px var(--noir);
}

/* Animations carousel */
.contenant  { animation: txtVslide  12s ease-in-out infinite; }
.contenant1 { animation: txtVslide1 12s ease-in-out infinite; }
.contenant2 { animation: txtVslide2 12s ease-in-out infinite; }
.contenant3 { animation: txtVslide3 12s ease-in-out infinite; }

@keyframes txtVslide {
  0%, 15%  { transform: translateY(0); }
  20%, 35% { transform: translateY(-60px); }
  40%, 55% { transform: translateY(-120px); }
  60%, 75% { transform: translateY(-180px); }
  80%, 95% { transform: translateY(-240px); }
  100%     { transform: translateY(-300px); }
}

@keyframes txtVslide1 {
  0%, 10%   { transform: translateY(0); }
  15%, 30%  { transform: translateY(-60px); }
  35%, 50%  { transform: translateY(-120px); }
  55%, 70%  { transform: translateY(-180px); }
  75%, 90%  { transform: translateY(-240px); }
  95%, 100% { transform: translateY(-300px); }
}

@keyframes txtVslide2 {
  0%, 5%   { transform: translateY(0); }
  10%, 25% { transform: translateY(-60px); }
  30%, 45% { transform: translateY(-120px); }
  50%, 65% { transform: translateY(-180px); }
  70%, 85% { transform: translateY(-240px); }
  90%, 100%{ transform: translateY(-300px); }
}

@keyframes txtVslide3 {
  0%       { transform: translateY(0); }
  5%, 20%  { transform: translateY(-60px); }
  25%, 40% { transform: translateY(-120px); }
  45%, 60% { transform: translateY(-180px); }
  65%, 80% { transform: translateY(-240px); }
  85%, 100%{ transform: translateY(-300px); }
}

/* ---- PETITES VIGNETTES ---- */

.vignette {
  flex: 1;
  min-height: 80px;
  position: relative;
  overflow: hidden;
  border: 5px solid var(--blanc);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
}

/* Image de survol */
.vignette-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s ease-in;
}

.vignette:hover .vignette-image {
  opacity: 1;
}

/* Logo — s'estompe au survol */
.vignette-logo {
  position: relative;
  z-index: 1;
  max-height: 40px;
  max-width: 75%;
  object-fit: contain;
  opacity: 1;
  transition: opacity 0.5s;
}

.vignette:hover .vignette-logo {
  opacity: 0.2;
}

/* Texte — s'estompe au survol */
.vignette-texte {
  position: relative;
  z-index: 1;
  color: var(--blanc);
  font-size: 1.2em;
  font-weight: bold;
  text-align: center;
  text-shadow: 1px 1px 1px var(--noir);
  opacity: 1;
  transition: opacity 0.5s;
}

.vignette:hover .vignette-texte {
  opacity: 0.2;
}

/* Écrans tactiles — images visibles par défaut */
@media (hover: none) {
  .gv-image     { opacity: 1; }
  .gv-contenu   { opacity: 1; }
  .vignette-image { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
  .grille { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .grille { grid-template-columns: 1fr; }
}