body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background-image: url('images/fdo.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    text-align: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 20px;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.logo {
    max-width: 200px;
    width: 50%;
}

.hero-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-block: 20px;
}

.title-image {
    max-width: 600px;
    width: 90%;
}

.ai-logo {
    max-width: 200px;
    width: 40%;
}

.survey-description {
    max-width: 700px;
    margin: 20px auto;
    font-size: 1.1em;
    line-height: 1.6;
    background-color: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 10px;
}

.buttons-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.button-link img {
    max-width: 250px;
    width: 100%;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.button-link:hover img {
    transform: scale(1.05);
}

.button-link-estudiantes:hover img {
    filter: drop-shadow(0 0 12px #79fff4);
}

.button-link-profesores:hover img {
    filter: drop-shadow(0 0 12px #ff00ffb3);
}


@media (max-width: 768px) {
    .buttons-container {
        flex-direction: column;
        gap: 15px;
        margin-top: 30px;
    }

    .button-link img {
        max-width: 200px;
    }

    .survey-description {
        font-size: 1em;
        padding: 10px;
    }
}