body {
    background-image: url(historia.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    margin: 0;
    padding: 0;
}

#encabezado {
    background-color: orange;
    color: white;
    text-align: center;
    padding: 10px;
}

#contenido {
    text-align: center;
    padding: 10px;
}

#subtitulo {
    color: brown;
    font-size: larger;
    font-weight: bold;
    font-style: italic;
    padding-bottom: 25px;
}

#contenedorStart {
    display: flex;
    justify-content: center;
}

#start {
    width: 250px;
    padding: 25px;
    font-size: large;
    border: 1px solid black;
    border-radius: 10px;
    background-color: gold;
}

#start:hover {
    background-color: goldenrod;
}

#pregunta {
    margin: auto;
    margin-top: 25px;
    width: 50%;
    border: 1px solid black;
    background-color: lightblue;
    display: none;
}

#opciones {
    margin: auto;
    margin-top: 25px;
    width: 50%;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.opcion {
    padding: 20px;
    font-size: large;
    border: 1px solid black;
    border-radius: 10px;
    background-color: lightgreen;
}

.opcion:hover {
    background-color: lightyellow;
}

.opcion.selected {
    background-color: lightblue;
}

#navegacion {
    margin: auto;
    margin-top: 25px;
    display: none;
}

#siguiente {
    width: 250px;
    padding: 10px;
    font-size: medium;
    border: 1px solid black;
    border-radius: 10px;
    background-color: lightblue;
}

#anterior {
    width: 250px;
    padding: 10px;
    font-size: medium;
    border: 1px solid black;
    border-radius: 10px;
    background-color: lightblue;
}

#progreso {
    display: none;
}

#resultado {
    margin-top: 25px;
    color: darkcyan;
}

table {
    margin: auto;
    padding-top: 20px;
    color: black;
}

th, td {
    padding: 10px;
}

th {
    background-color: lightskyblue;
}

td {
    background-color: lightyellow;
}