/* --- VARIABLES --- */
:root {
    --morado-cir: #35256A;
    --amarillo-cir: #F2E628;
    --amarillo-hover: #e5d91f;
    --blanco: #ffffff;
    --gris-fondo: #f8f9fa;
}

/* --- BASE --- */
body {
    background-color: var(--gris-fondo);
    padding-top: 80px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    overflow-x: hidden;
}

/* --- ENCABEZADO --- */
.texto-catalogo {
    text-align: center;
    padding: 40px 10% 10px;
}

.texto-catalogo h1 {
    color: var(--morado-cir);
    font-size: 2.6rem;
    margin-bottom: 10px;
}

.divisor-amarillo {
    width: 80px;
    height: 5px;
    background-color: var(--amarillo-cir);
    border: none;
    margin: 20px auto;
    border-radius: 50px;
}

/* --- VISOR DEL CATÁLOGO (MARCO TIPO LAPTOP) --- */
.seccion-libro-fija {
    max-width: 900px;
    margin: 0 auto 60px;
    padding: 0 20px;
    text-align: center;
}

.marco-laptop {
    background-color: var(--morado-cir);
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

.pantalla-visor {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; 
    height: 0;
    background: #fff;
    border-radius: 5px;
    overflow: hidden;
}

.pantalla-visor iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* --- BOTÓN DE DESCARGA --- */
.pdf-footer {
    margin-top: 30px;
}

.btn-descarga {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--amarillo-cir);
    color: var(--morado-cir);
    padding: 14px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 15px rgba(53, 37, 106, 0.1);
}

.btn-descarga:hover {
    background-color: var(--amarillo-hover);
    transform: translateY(-3px);
    box-shadow: 0 12px 20px rgba(53, 37, 106, 0.2);
}

/* --- ANIMACIONES REVEAL --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .texto-catalogo h1 {
        font-size: 2rem;
    }

    .seccion-libro-fija {
        max-width: 100%;
    }

    .pantalla-visor {
        padding-bottom: 130%; 
    }

    .btn-descarga {
        width: 100%;
        justify-content: center;
    }
}