body {
    font-family:'Times New Roman', Times, serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: linear-gradient(to bottom, #EBF5F0, #EBF5);
    padding: 20px;
    margin: 0;
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: transparent;
    width: 100%;
    padding: 10px 0;
    margin-bottom: 20px;
}

nav {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

#inicio {
    color: #1a5c9a;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
    transition: color 0.3s;
}

#inicio:hover {
    color: #38a798;
}

h1 {
    color: #1a5c9a;
    margin-bottom: 30px;
    font-size: 40px;
}

p {
    max-width: 700px;
    margin: 10px auto 30px auto;
    line-height: 1.6;
    padding: 5px;
    font-size: 18px;
    text-align: center;
}

.Cuestionario_preguntas {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 650px;
    margin-bottom: 40px;
    text-align: left;
}

#pregunta {
    font-size: 1.4em;
    color: #1a5c9a;
    margin-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 10px;
    text-align: center;
}

.respuestas {
    margin-bottom: 20px;
}

.opcion {
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, box-shadow 0.2s;
    text-align: left;
}

.opcion:hover {
    background-color: #e9e9e9;
}

.opcion.seleccionada {
    background-color: #55b8aa;
    border-color: #38a798;
    font-weight: bold;
    color: white;
}

.opcion.correcta {
    background-color: #38a798;
    color: white;
    border-color: #2e8b7d;
}

.opcion.incorrecta {
    background-color: #e78686;
    color: white;
    border-color: #c62828;
    opacity: 0.9;
}

#enviar {
    display: block;
    width: 100%;
    padding: 15px 40px;
    background-color: #38a798;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 5px;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(56, 167, 152, 0.3);
    transition: background-color 0.3s, transform 0.1s;
}

#enviar:hover:not(:disabled) {
    background-color: #2e8b7d;
    transform: translateY(-2px);
}

#enviar:disabled {
    background-color: #a5d6a7;
    cursor: not-allowed;
    transform: none;
}

.oculto {
    display: none;
}

#resultado {
    text-align: center;
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    background-color: #f0f8ff;
    font-weight: bold;
    border: 1px dashed #38a798;
}

#resultado h2 {
    color: #1a5c9a;
    margin-top: 0;
}

.feedback-icon {
    font-size: 2.5em;
    display: block;
    margin-bottom: 10px;
}