#revista .numero {
    margin-bottom: 1em;
    border: 1px solid #444;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 0 4px rgba(255,204,0,0.2);
    transition: box-shadow 0.3s ease;
}

.toggle-numero,
.toggle-articulo {
    width: 100%;
    text-align: left;
    padding: 1em;
    font-weight: bold;
    border: none;
    background: #333;
    color: #ffcc00;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease, padding 0.4s cubic-bezier(0.4, 0, 0.2, 1), gap 0.4s cubic-bezier(0.4, 0, 0.2, 1), margin 0.4s cubic-bezier(0.4, 0, 0.2, 1), justify-content 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.toggle-articulo {
    background: #2a2a2a;
    font-weight: normal;
    padding-left: 2em;
}

.toggle-numero:hover,
.toggle-articulo:hover {
    background: #444;
}

.toggle-articulo::after {
    content: "▸";
    transition: transform 0.3s ease;
}

.toggle-numero::after {
    content: "▸";
    transition: transform 0.3s ease;
    font-size: 1.5em;
    margin-right: 0.4em;
    flex-shrink: 0;
}

.toggle-numero.active::after,
.toggle-articulo.active::after {
    transform: rotate(90deg);
}

.contenido-numero,
.contenido-articulo {
    max-height: 0;
    overflow: hidden;
    background: #1f1f1f;
    transition: max-height 0.6s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0 1em;
    color: #fff;
}

.contenido-numero.open,
.contenido-articulo.open {
    max-height: 1500px; 
    padding-top: 1em;
    padding-bottom: 1em;
}

.contenido-articulo .scrollable {
    max-height: 300px;
    overflow-y: auto;
    padding-left: 1em;
    padding-right: 1em;
}

.contenido-articulo .scrollable::-webkit-scrollbar {
    width: 8px;
}

.contenido-articulo .scrollable::-webkit-scrollbar-thumb {
    background-color: rgba(255, 204, 0, 0.6);
    border-radius: 4px;
}

.contenido-articulo .scrollable::-webkit-scrollbar-track {
    background-color: transparent;
}

.miniatura-colapsada {
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1), height 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), margin 0.4s ease, padding 0.4s ease !important;
}

.titulo-edicion {
    transition: font-size 0.4s cubic-bezier(0.4, 0, 0.2, 1), font-weight 0.3s ease, text-align 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.toggle-numero {
    transition: padding 0.4s cubic-bezier(0.4, 0, 0.2, 1), gap 0.4s cubic-bezier(0.4, 0, 0.2, 1), margin 0.4s cubic-bezier(0.4, 0, 0.2, 1), min-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), justify-content 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.miniatura-colapsada {
    display: block;
    flex-shrink: 0;
}

.contenido-numero {
    will-change: max-height;
    transition: max-height 0.6s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.contenido-numero.open .descripcion-edicion,
.contenido-numero.open .pdf-actions,
.contenido-numero.open .portada-miniatura {
    animation: fadeIn 0.5s ease 0.1s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}