.center {
    text-align: center;
    margin-top: 50px;
}

.center img {
    display: block;
    margin: 0 auto;
    margin-bottom: 20px;
}

.custom-heading {
    font-size: 50px;
    margin-bottom: 50px;
}

.parrafo {
    text-align: center;
    font-size: 1.25rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 50px;
}

.container {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 1.5rem;
    margin: 50px;
}

a {
    text-decoration: none;
}

.card {
    background-color: #ffffff;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    position: relative;
    border: 1px solid #ccc;
    width: 350px;
    height: 350px;
    margin: 25px auto;
    opacity: 0.8;
    transition: opacity 0.3s ease;
    overflow: hidden;
}

.card:hover {
    opacity: 1;
    background-color: #f9fafb;
    color: #fff;
}

.card img {
    margin-right: 0.5rem;
}

.card-title {
    font-weight: 600;
    color: #111;
    font-size: 1.125rem;
}

.card-text {
    margin-bottom: 1.5rem;
    color: #515151;
}

.p-4 {
    padding: 1rem;
}

.p-2 {
    padding: 0.5rem;
}

.button-container {
    padding: 0.5rem;
    text-align: center;
    border-radius: 0.25rem;
    /*opacity: 0;*/
    position: absolute;
    bottom: 0;
    left: 0;
    width: 96%;
    height: 20px;
    background-color: #7AC143;
    color: #7AC143;
    font-size: 1.5em;
    transition: height 0.3s ease, opacity 0.3s ease;
}

.card:hover .button-container {
    opacity: 1;
    height: 60px;
    color: #ffffff;
    line-height: 50px;
}

.card:hover .card-text,
.card:hover .card-title {
    opacity: 1;
    color: #ffffff;
}

.e-learning:hover {
    background-image: url('http://myhub.zkteco.eu/wp-content/uploads/2024/03/e-learning-academy.jpg');
    background-size: cover;
    color: #ffffff;
}

.webinars:hover {
    background-image: url('http://myhub.zkteco.eu/wp-content/uploads/2024/03/webinar-academy-boton.jpg');
    background-size: cover;
    color: #ffffff;
}

.f2f:hover {
    background-image: url('http://myhub.zkteco.eu/wp-content/uploads/2024/03/f2f-academy-boton.jpg');
    background-size: cover;
    color: #ffffff;
}

.card.clicked p {
    color: #111111;
}

.card.clicked h3 {
    color: black;
}

@media (max-width: 560px) {
    .button-container {
        height: 60px;
        color: #ffffff;
    }

    .card:hover .button-container {
        opacity: 1;
        height: 60px;
        color: #ffffff;
    }

    .card {
        margin: 20px auto;
    }
}

@media (max-width: 767px) {
    .button-container {
        height: 60px;
        color: #ffffff;
    }

    .card:hover .button-container {
        opacity: 1;
        height: 60px;
        color: #ffffff;
    }

    .card {
        margin: 20px auto;
    }
}

@media (max-width: 1536px) {
    .card {
        margin: 20px auto;
    }
}