header {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

main {
  padding: 50px;
}

.descricao-pagina {
  margin-top: 60px;
}

.descricao-pagina div h1 {
  color: #2687ab;
  font-weight: 700;
}

.descricao-pagina div {
  display: flex;
  gap: 25px;
}

.descricao-pagina p {
  margin-top: 20px;
  margin-left: 80px;
  margin-right: 45%;
}

.btn-voltar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: #53a2bf;
  color: white;
  font-size: 28px;
  border-radius: 50%;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  text-decoration: none;
  transition: all 0.2s ease-in-out;
}

/* Responsividade — Tablets */
@media (max-width: 1024px) {
  .descricao-pagina p {
    margin-left: 60px;
    margin-right: 25%;
    font-size: 0.95rem;
  }
}

/* Responsividade — Celulares */
@media (max-width: 768px) {
  .descricao-pagina {
    margin-top: 40px;
    padding: 0 20px;
  }

  .descricao-pagina div {
    flex-direction: row;
    align-items: center;
    gap: 15px;
  }

  .descricao-pagina div h1 {
    font-size: 1.6rem;
  }

  .descricao-pagina p {
    margin: 15px 0 0 0;
    font-size: 0.95rem;
    text-align: justify;
  }
}

/* Telas muito pequenas */
@media (max-width: 480px) {
  .descricao-pagina {
    margin-top: 30px;
    padding: 0 15px;
  }

  .descricao-pagina div {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .descricao-pagina div h1 {
    font-size: 1.4rem;
  }

  .descricao-pagina p {
    margin: 10px 0 0 0;
    font-size: 0.9rem;
    text-align: justify;
  }
}

/* === TABELA DE EBOOKS === */

.tabela-ebooks {
  display: flex;
  justify-content: center;
  margin: 40px 0 80px 0;
}

.tabela {
  width: 90%;
  max-width: 1100px;
  background-color: #fff;
  border-radius: 8px;
}

/* Cabeçalho */
.cabecalho {
  display: grid;
  grid-template-columns: 150px 1fr 250px;
  font-weight: bolder;
  font-size: large;
  border-bottom: 2px solid #bbb;
  padding-bottom: 10px;
  margin-bottom: 10px;
  text-align: left;
  justify-items: center;
}

/* Linhas da tabela */
.linha {
  display: grid;
  grid-template-columns: 150px 1fr 250px;
  align-items: center;
  justify-items: center;
  padding: 16px 0;
  border-bottom: 1px solid #ddd;
}

.linha img {
  width: 80px;
  height: auto;
  border-radius: 4px;
  display: block;
  margin: 0 auto;
}

.linha div {
  color: #333;
  font-size: 15px;
}

.linha a {
  color: #007bff;
  text-decoration: none;
  font-weight: 500;
}

.linha a:hover {
  text-decoration: underline;
}

.resumo-ebook {
  padding: 40px;
}

/* Responsividade */
@media (max-width: 768px) {
  .cabecalho {
    display: none;
  }

  .linha {
    grid-template-columns: 80px 1fr;
    grid-template-areas:
      "img desc"
      "img link";
    gap: 8px 12px;
    border-bottom: 1px solid #ddd;
  }

  .linha img {
    grid-area: img;
  }

  .linha div {
    grid-area: desc;
  }

  .linha a {
    grid-area: link;
  }
}