.catalogo {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 20px;
    text-align: center;
}

    .catalogo h1 {
        color: #1e73be;
        font-size: 38px;
        margin-bottom: 15px;
    }

.subtitulo {
    max-width: 750px;
    margin: 0 auto 35px;
    color: #666;
    font-size: 17px;
    line-height: 1.7;
}

.tapa {
    display: inline-block;
    transition: .25s;
}

    .tapa img {
        width: 100%;
        max-width: 420px;
        border-radius: 12px;
        box-shadow: 0 6px 20px rgba(0,0,0,.15);
    }

    .tapa:hover {
        transform: translateY(-4px);
    }

.botones {
    margin: 40px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

.catalogo-online {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 340px;
    height: 52px;
    background: #1565c0;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: .2s;
}

    .catalogo-online:hover {
        background: #0d5aa7;
    }

.botones-secundarios {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.catalogo-whatsapp,
.catalogo-pdf {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 250px;
    height: 50px;
    padding: 0 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: .2s;
    box-sizing: border-box;
}

.catalogo-whatsapp {
    background: #25D366;
    color: white;
}

.catalogo-pdf {
    border: 2px solid #1565c0;
    color: #1565c0;
    background: white;
}

@media(max-width:768px) {

    .catalogo h1 {
        font-size: 30px;
    }

    .catalogo-online {
        width: 100%;
        max-width: 340px;
    }

    .botones-secundarios {
        flex-direction: column;
        width: 100%;
        align-items: center;
    }

    .catalogo-whatsapp,
    .catalogo-pdf {
        width: 100%;
        max-width: 340px;
    }

    .ventajas {
        grid-template-columns: 1fr;
    }
}