:root {
    --color-primario: #004AAD;
    --color-secundario: #E63946;
    --color-terciario: #F4A300;
    --color-complementario: #008B6F;
    --color-fondo-claro: #F7F9FB;
    --color-fondo-oscuro: #1E1E2F;
    --color-texto-principal: #212529;
    --color-texto-oscuro: #FFFFFF;
    --color-neutro: #E1E8ED;
}

/* ==================================================== */
/* ESTILOS PARA LA SECCIÓN DE TARJETAS PROMOCIONALES */
/* ==================================================== */

.promocion-title {
    color: var(--color-fondo-oscuro);
    margin-bottom: 40px;
    font-size: 35px;
    text-align: center;
}

.cards-wrapper {
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 20px;
    width: 100%;
    max-width: 900px; 
    margin: 0 auto;
    padding: 0 10px;
}

.center-card-element {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.card.card-promo {
    width: 100%; 
    height: auto; /* <--- CAMBIO: Altura flexible */
    min-height: 300px; /* <--- AÑADIDO: Altura mínima para evitar que se vea alargada */
    position: relative;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.4s ease-out;
    margin: 0; 
    overflow: hidden; 
    margin: 0 auto; 
    cursor: pointer;
}

/* Estilo específico para la tercera tarjeta, que ocupa el ancho completo en el grid */
.card.card-promo:nth-child(3) {
    grid-column: 1 / -1; 
    max-width: calc(50% - 10px); 
    justify-self: center; 
}

.card.card-promo:hover {
    transform: scale(1.03);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

/* --- ESTILO PARA ACTIVAR EL HOVER CON CLIC EN DISPOSITIVOS TÁCTILES --- */
/* Estas reglas se aplican cuando JS añade la clase .flipped */
.card.card-promo.flipped .general {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
}

.card.card-promo.flipped .additional {
    opacity: 1;
}

/* --- ESTILO DE LA VISTA GENERAL (FRONTAL) --- */
.card.card-promo .general {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: var(--color-fondo-claro);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
    box-sizing: border-box;
}

.card.card-promo:hover .general {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
}

.card.card-promo .general h1 {
    font-size: 1.5rem;
    color: var(--color-primario);
}

.card.card-promo .general p {
    font-size: 0.9rem;
    color: var(--color-texto-principal);
    line-height: 1.4;
    margin-bottom: 1rem;
}

.card.card-promo .general .more {
    color: #999;
    font-size: 0.75rem;
    position: absolute;
    bottom: 15px;
}

/* --- ESTILO DE LA VISTA AL HACER HOVER (REVERSO) --- */
.card.card-promo .additional {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.4s ease-out;
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: center; 
    text-align: center;
    padding: 1.5rem;
    color: var(--color-texto-oscuro); 
    box-sizing: border-box;
}

.card.card-promo:hover .additional {
    opacity: 1;
}

/* Temas de Fondo (Colores) */
.card.card-promo .additional {
    background: linear-gradient(135deg, var(--color-complementario) 0%, var(--color-complementario) 100%);
}

.card.card-promo.green .additional {
    background: linear-gradient(135deg, var(--color-secundario) 0%, var(--color-secundario) 100%);
}

.card.card-promo.blue .additional {
    background: linear-gradient(135deg, var(--color-terciario) 0%, var(--color-terciario) 100%);
}

/* ======================================= */
/* ESTILOS DE LOS ELEMENTOS EN HOVER */
/* ======================================= */

.card.card-promo .additional .logo-placeholder {
    width: 120px; 
    height: 120px;
    background-color: rgba(255, 255, 255, 0.5); 
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: bold;
    font-size: 1rem;
    margin-bottom: 15px; 
    border: 3px solid rgba(255, 255, 255, 0.7); 
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3); 
    position: relative; 
    top: unset;
    left: unset;
    transform: none;
}

.card.card-promo .additional .logo-placeholder img {
    max-width: 90%; 
    max-height: 90%;
    width: auto;
    height: auto;
    object-fit: contain; 
}


.card.card-promo .additional h1 {
    font-size: 1.8rem; 
    margin-bottom: 25px; 
    color: var(--color-texto-oscuro);
}

.card.card-promo .additional .user-card,
.card.card-promo .additional .more-info,
.card.card-promo .additional .stats {
    display: none;
}

.card.card-promo .additional .visit-button {
    display: inline-block;
    padding: 10px 25px;
    background-color: rgba(255, 255, 255, 0.3); 
    color: var(--color-texto-oscuro);
    text-decoration: none;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: 2px solid rgba(255, 255, 255, 0.5); 
    cursor: pointer;
}

.card.card-promo .additional .visit-button:hover {
    background-color: var(--color-texto-oscuro); 
    color: var(--color-complementario);
    transform: translateY(-2px);
    border-color: var(--color-texto-oscuro); 
}

.card.card-promo.green .additional .visit-button:hover {
    color: var(--color-secundario);
}

.card.card-promo.blue .additional .visit-button:hover {
    color: var(--color-terciario);
}


/* ==================================================== */
/* MEDIA QUERY para responsividad (max-width: 768px) */
/* (Mobile: 1 Columna y Click-to-Hover Habilitado) */
/* ==================================================== */

@media (max-width: 768px) {

    /* FUERZA 1 COLUMNA EN MÓVILES */
    .cards-wrapper {
        display: flex; /* Cambiamos de grid a flex para apilar */
        flex-direction: column; 
        align-items: center; 
        gap: 30px; 
        perspective: none; 
        max-width: 100%;
    }

    /* Anular el estilo de grid de la tercera tarjeta en móvil */
    .card.card-promo:nth-child(3) {
        grid-column: auto; 
        max-width: 90%; 
        justify-self: auto;
    }

    /* Contenedor principal de la tarjeta */
    .card.card-promo {
        width: 90% !important; 
        max-width: 450px; 
        height: auto !important; 
        min-height: 250px; /* Asegura una altura mínima legible */
        margin: 0; 
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        transform: none; 
        overflow: hidden; /* CRÍTICO: Necesario para el efecto overlay/flip */
    }

    /* Desactivar el efecto de hover de escritorio */
    .card.card-promo:hover {
        transform: none;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }
    
    /* 1. HABILITAR EL FLIP/OVERLAY EN .general */
    .card.card-promo .general {
        opacity: 1; 
        transform: none;
        /* CRÍTICO: Debe ser ABSOLUTE para que .additional pueda superponerse */
        position: absolute; 
        width: 100%;
        height: 100%;
        backface-visibility: hidden; 
        pointer-events: auto; 
        box-sizing: border-box;
    }
    
    /* 2. HABILITAR EL FLIP/OVERLAY EN .additional */
    .card.card-promo .additional {
        /* CRÍTICO: NO USAR display: none; y debe ser ABSOLUTE */
        display: flex; 
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        backface-visibility: hidden;
        opacity: 0; /* Oculto por defecto, se revela con la clase .flipped */
        box-sizing: border-box;
    }

    /* Ocultar la leyenda de hover */
    .card.card-promo .general .more {
        display: none; 
    }
}

/* @media (max-width: 480px) - Para pantallas muy pequeñas */
@media (max-width: 480px) {
    .card.card-promo {
        width: 100%; 
        max-width: none;
    }
    #facebook-iframe {
        height: 250px !important;
    }
}