#banner {
    background-image: url("../img/portada-4.png");
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* Relación de aspecto 16:9 */
    height: 0;
    overflow: hidden;
}
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.video-thumbnail {
    position: relative;
    cursor: pointer;
}
.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.play-button:hover {
    background-color: rgba(255, 0, 0, 0.8);
}
.play-icon {
    width: 0;
    height: 0;
    border-top: 15px solid transparent;
    border-left: 25px solid #fff;
    border-bottom: 15px solid transparent;
    margin-left: 5px;
}

.texto-video-educativo {
    font-size: 14pt;
    color: #fff;
}

.fondo-seccion-recurso {
    background-color: #F3F3F3;
}

.fondo-item-lista {
    background-color: #F3F3F3;
}

.fondo-lista-recurso {
    background-color: #E1E1E1;
}