.sobre {
    width: 40%;
    margin: 50px 0 50px 50px;
    padding: 30px; 
    background-color: rgba(0, 0, 0, 0.7);
    color: #ffffff; 
    border-radius: 10px; 
    text-align: justify;
}

.sobre h1, .sobre h2 {
    color: #ffd700;
    text-align: center;
}

.back-button {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #ffd700;
    color: #000000;
    padding: 10px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    z-index: 1000;
    transition: background-color 0.3s;
}

.back-button:hover {
    background-color: #ffc107;
}

@media (max-width: 768px) {
    .sobre {
        width: 90%; 
        margin: 20px auto; 
        padding: 20px; 
    }
    
    .back-button {
        top: 10px;
        left: 10px;
        right: auto;
    }
}