.app-container {
    display: grid;
    /* Gauche (Stats 320px) | Centre | Droite (Shop 380px) */
    grid-template-columns: 320px 1fr 380px;
    height: 100vh;
    width: 100vw;
    gap: 0;
}

.panel {
    padding: 30px;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* --- Colonnes Latérales --- */

/* Colonne STATS (Fragments) -> GAUCHE */
.panel-stats {
    background-color: var(--bg-panel);
    z-index: 10;
    box-shadow: 5px 0 20px rgba(0,0,0,0.2);
    border-right: 1px solid rgba(255,255,255,0.05);
    border-left: none;
}

/* Colonne SHOP (Marché) -> DROITE */
.panel-shop {
    background-color: var(--bg-panel);
    overflow-y: hidden; 
    border-left: 1px solid rgba(255,255,255,0.05);
    border-right: none;
}

/* Colonne CENTRE (Action) */
.panel-action {
    align-items: center;
    justify-content: center;
    /* CORRECTION : On met 'none' pour laisser voir le fond du body (lave ou gris) */
    background: none; 
}

/* Mobile */
@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto 1fr;
        overflow-y: auto;
    }
    .panel { padding: 20px; }
    .panel-shop { height: 500px; border: none; }
    .panel-stats { border: none; }
}