body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.principal {
    text-align: center;
    margin: 10% auto;
    max-width: 320px;
}

.botoes {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

.botao {
    display: inline-block;
    padding: 10px 30px;
    background-color: #2e7d32;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}

.botao-sair {
    background-color: #757575;
}