/* Fonte e base */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #eef2f3, #8e9eab);
    margin: 0;
    padding: 40px 20px;
}

/* Caixa principal */
.container {
    max-width: 600px;
    margin: auto;
    background: #ffffff;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* Título da pergunta */
h1, h2 {
    font-size: 24px;
    margin-bottom: 25px;
    color: #333;
    text-align: center;
}

/* Alternativas */
.alternativas {
    margin-bottom: 20px;
}

.alternativa {
    display: block;
    margin-bottom: 12px;
    font-size: 18px;
    background: #f1f1f1;
    padding: 10px 15px;
    border-radius: 6px;
    transition: background 0.3s ease;
    cursor: pointer;
}

.alternativa:hover {
    background: #e0e0e0;
}

input[type="radio"] {
    margin-right: 10px;
}

/* Botão */
.botao-responder {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: block;
    margin: 20px auto 0;
}

.botao-responder:hover {
    background-color: #0056b3;
}

/* Mensagens de acerto/erro */
.mensagem {
    font-size: 18px;
    margin-top: 20px;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
}

.sucesso {
    background-color: #d4edda;
    color: #155724;
}

.erro {
    background-color: #f8d7da;
    color: #721c24;
}

/* Pontuação */
.pontuacao {
    margin-top: 30px;
    font-size: 16px;
    text-align: center;
    color: #444;
    font-weight: bold;
}