*, *::before, *::after {
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0; /* Fundo claro */
}

.container {
    width: 800px;
    max-width: 90%;
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px 2px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

#question {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #007bff; /* Azul para a pergunta */
    font-weight: bold;
}

.btn-grid {
    display: grid;
    grid-template-columns: repeat(2, auto); /* Duas colunas de botões */
    gap: 10px;
    margin: 20px 0;
}

.btn {
    background-color: #e0e0e0;
    border: 1px solid #c0c0c0;
    border-radius: 5px;
    padding: 10px;
    color: #333;
    outline: none;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn:hover:not(:disabled) {
    border-color: #007bff;
    background-color: #f5f5f5;
}

.btn.correct {
    background-color: #a8e6cf; /* Verde claro para correto */
    color: black;
    border-color: #04AA6D;
}

.btn.wrong {
    background-color: #ff9999; /* Vermelho claro para errado */
    color: black;
    border-color: #dc3545;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.start-btn, .next-btn {
    font-size: 1.2rem;
    font-weight: bold;
    padding: 10px 20px;
    background-color: #007bff; /* Azul principal */
    color: white;
    border: none;
}

.start-btn:hover, .next-btn:hover {
    background-color: #0056b3;
}

#result {
    font-size: 1.8rem;
    font-weight: bold;
    color: #04AA6D;
    margin-top: 20px;
}

.hide {
    display: none;
}