/* -----------------------------------------------------------------
   GRILLE CONTENEUR : alter-home-nav
----------------------------------------------------------------- */
.alter-home-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--grid-gap, 30px);
    width: 100%;
    box-sizing: border-box;
}

/* -----------------------------------------------------------------
   ÉLÉMENT DE GRILLE : alter-home-item
----------------------------------------------------------------- */
.alter-home-item,
.alter-home-item-editor {
    position: relative;
    padding: 35px;
    box-sizing: border-box;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), 
                box-shadow 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
                background-color 0.3s ease;
}

.alter-item-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    filter: var(--alter-bg-filter, none);
    pointer-events: none;
    transition: transform 0.4s ease, opacity 0.4s ease, filter 0.4s ease;
}

.alter-item-inner {
    position: relative;
    z-index: 2;
}

.alter-item-link {
    position: absolute;
    inset: 0;
    z-index: 3;
    border-radius: inherit;
}

.alter-item-link:focus-visible {
    outline: 3px solid currentColor;
    outline-offset: 4px;
}

/* Conserve les effets des cellules existantes jusqu'à leur migration. */
.alter-home-item.entry-fade,
.alter-home-item.entry-fade-up,
.alter-home-item.entry-zoom {
    animation-duration: 0.7s;
    animation-fill-mode: backwards;
    animation-timing-function: cubic-bezier(0.2, 0.7, 0.25, 1);
    animation-delay: var(--alter-entry-delay, 0s);
}

.alter-home-item.entry-fade {
    animation-name: alter-home-fade-in;
}

.alter-home-item.entry-fade-up {
    animation-name: alter-home-fade-up;
}

.alter-home-item.entry-zoom {
    animation-name: alter-home-zoom-in;
}

.alter-home-nav > .alter-home-item:nth-child(1) { --alter-entry-delay: 0s; }
.alter-home-nav > .alter-home-item:nth-child(2) { --alter-entry-delay: 0.12s; }
.alter-home-nav > .alter-home-item:nth-child(3) { --alter-entry-delay: 0.24s; }
.alter-home-nav > .alter-home-item:nth-child(4) { --alter-entry-delay: 0.36s; }
.alter-home-nav > .alter-home-item:nth-child(5) { --alter-entry-delay: 0.48s; }
.alter-home-nav > .alter-home-item:nth-child(6) { --alter-entry-delay: 0.6s; }
.alter-home-nav > .alter-home-item:nth-child(7) { --alter-entry-delay: 0.72s; }
.alter-home-nav > .alter-home-item:nth-child(8) { --alter-entry-delay: 0.84s; }

@keyframes alter-home-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes alter-home-fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes alter-home-zoom-in {
    from { opacity: 0; transform: scale(0.94); }
    to { opacity: 1; transform: scale(1); }
}

/* -----------------------------------------------------------------
   EFFETS DE SURVOL (HOVER)
----------------------------------------------------------------- */

.alter-home-item.hover-lift:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.alter-home-item.hover-zoom:hover {
    transform: scale(1.03);
}

.alter-home-item.hover-fade:hover {
    opacity: 0.8;
}

.alter-home-item.hover-bg-zoom:hover .alter-item-background,
.alter-home-item-editor.hover-bg-zoom:hover .alter-item-background {
    transform: scale(1.08);
}

.alter-home-item.hover-bg-fade:hover .alter-item-background,
.alter-home-item-editor.hover-bg-fade:hover .alter-item-background {
    opacity: 0.65;
}

.alter-home-item.hover-bg-grayscale:hover .alter-item-background,
.alter-home-item-editor.hover-bg-grayscale:hover .alter-item-background {
    filter: var(--alter-bg-filter, none) grayscale(1);
}

/* -----------------------------------------------------------------
   RESPONSIVE (Tablette & Mobile)
----------------------------------------------------------------- */
@media (max-width: 880px) {
    .alter-home-nav {
        grid-template-columns: 1fr;
    }
    
    .alter-home-item,
    .alter-home-item-editor {
        padding: 25px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .alter-home-item.entry-fade,
    .alter-home-item.entry-fade-up,
    .alter-home-item.entry-zoom {
        animation: none;
    }
}