body {
    margin: 0;
    padding: 0;
    background: lightblue;
    font-family: Arial, sans-serif;
}

#contenedor {
    min-height: 100vh;
    padding: 10px 30px;
}

.contenedorActivo {
    opacity: 1;
    pointer-events: auto;
}

.contenedorPasivo {
    opacity: 0.3;
    pointer-events: none;
}

#abrirModal {
    margin-bottom: 10px;
    padding: 10px 20px;
    font-size: 1rem;
    background: gainsboro;
    border: 1px solid silver;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

.ventanaModalApagado {
    visibility: hidden;
}

.ventanaModalPrendido {
    visibility: visible;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modalContenido {
    background: lightgray;
    border-radius: 6px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.2);
    min-width: 900px;
    min-height: 500px;
    max-width: 95vw;
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modalHeader {
    background: gray;
    color: black;
    font-weight: bold;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
}

.cerrarModal {
    background: transparent;
    border: none;
    color: red;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    margin-left: 20px;
}

iframe {
    flex: 1 1 auto;
    border: none;
    width: 100%;
    min-height: 500px;
    background: whitesmoke;
}