body {
    margin: 0;
    padding: 0;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url('fundo.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.livro_escatologia, .overlay { 
  display: flex;
  position: absolute;
  top: 1vw;
  color: azure;
  font-size: 1.1rem;
  text-align: justify;
  width: 94%;
  background-color: #07101acc;
  padding: 0 1.3vw;
  font-family: monospace;
  z-index: 1;
}

.tags_livro{
  position: fixed;
  right: 0;
  color: #525252;
  text-align: -webkit-right;
  font-size: 0.5vw !important;
}

ul {
    right: 0;
    color: #525252;
    text-align: -webkit-right;
    font-size: 0.8vw !important;
    text-decoration: none;
    list-style: none;
    position: fixed;
    top: 0;
}

.tags_livro h2, li a {
  line-height: 0;
}

.tags_livro p {
  visibility: hidden;
  font-size: 0;
}

.tags_livro a, li a {
  text-decoration: none;
  color: #ffff10;
}

.tags_livro a:hover, li a:hover {
  color: #fff;
  font-weight: bold;
}

footer {
    display: flex;
    justify-content: center;
    padding: 20px;
    align-self: flex-end;
    bottom: 0;
    position: fixed;
    z-index: 999;
}

.btn-livro {
    padding: 15px 30px;
    font-size: 3rem;
    font-weight: bold;
    color: #ffffff;
    background-color: #007bffc4;
    border: none;
    border-radius: 25px;
    text-decoration: none;
    text-align: center;
    transition: background-color 0.3s ease;
}

.btn-livro:hover {
    background-color: #0056b3;
}

@media (max-width: 768px) {
    body {
        background-image: url('fundo-mobile.png');
        background-attachment: fixed;
    }

    .btn-livro { font-size: 1.5rem; }
    .tags_livro, ul { font-size: 0.4vw !important; }
}