body {
  font-family: Arial, sans-serif;
  background: #f2f6ff;
  margin: 0;
  padding: 20px;
}

.quiz-container {
  max-width: 700px;
  margin: auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #1a73e8;
}

button {
  padding: 10px 20px;
  margin-top: 20px;
  font-size: 16px;
  cursor: pointer;
}

.option {
  display: block;
  margin: 10px 0;
  padding: 12px;
  border-radius: 5px;
  border: 1px solid #ccc;
  background: #f9f9f9;
  cursor: pointer;
}

.option.correct {
  background-color: #d0e7ff;
  border: 2px solid #1a73e8;
  color: #1a73e8;
}

.option.incorrect {
  background-color: #ffd6d6;
  border: 2px solid #d32f2f;
  color: #d32f2f;
}

#feedback {
  margin-top: 15px;
  font-style: italic;
  color: #333;
}

.score {
  margin-top: 30px;
  font-size: 18px;
  text-align: center;
}

.comentario {
  font-size: 0.9em;
  color: #444;
  margin-top: 6px;
  margin-bottom: 10px;
  padding: 5px 10px;
  background-color: #f9f9f9;
  border-left: 3px solid #ddd;
  border-radius: 4px;
}

.correct {
  background-color: #d4edda; /* verde claro */
}

.incorrect {
  background-color: #f8d7da; /* vermelho claro */
}

.option {
  display: block;
  width: 100%;
  margin: 8px 0;
  padding: 10px;
  font-size: 1em;
  cursor: pointer;
}