.container {
    margin: 8px auto;
    max-width: 720px;
    width: 100%;
}

.top,
img {
    display: block;
    text-align: center;
    margin: 16px auto;
}

.title-text {
    margin: 16px auto;
    text-align: left;
    justify-content: center;
    align-items: center;
}

.main-text > h2,
.main-text > h4,
.main-text > p {
    text-align: justify;
    margin: 32px auto;
}

.top,
img,
.title-text {
    animation: fadeIn 0.75s;
    transition: 0.5s;
}

img {
    animation: fadeIn 0.75s;
}

#btnTopo {
    display: none; 
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 99;
    font-size: 24px; 
    border: 1px solid #141414;
    outline: none;
    background-color: rgb(0, 123, 255);
    cursor: pointer;
    padding: 0; 
    width: 50px; 
    height: 50px; 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    transition: background-color 0.3s ease;
}

#btnTopo:hover {
    background-color: rgba(0, 123, 255, 0.5);
}

@media screen and (max-width: 768px) {
    .container {
        padding: 0px 8px;
    }

    img {
        max-width: 100%;
    }
}