* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

header.topo {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  flex-wrap: wrap;
  border-bottom: 1px solid #ddd;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  width: 130px;
}

.menu {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.menu a {
  text-decoration: none;
  color: black;
  font-weight: bold;
}

.intro {
  text-align: center;
  margin: 40px 20px;
}

.intro h1 {
  font-size: 2.5em;
  margin-bottom: 10px;
}

.logo-central {
  margin-top: 30px;
}

.logo-central img {
  width: 140px;
  height: auto;
}

.logo-central span {
  display: block;
  margin-top: 10px;
  font-weight: bold;
}

.livros {
  display: grid;
  grid-template-columns: 1fr 1fr;
  justify-items: center;
  align-items: center;
  gap: 20px;
  padding: 40px 20px;
}

.livro {
  position: relative;
}

#txtpromocao{
    position: absolute;
    left: 100%;
    bottom: 40%;
}

.livro img {
  max-width: 200px;
  height: auto;
}

.desconto {
  position: absolute;
  right: -150px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: bold;
  font-size: 1.2em;
}

footer {
  background-color: #05A16A;
  color: white;
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  margin-top: 50px;
}

/* ========================== RESPONSIVIDADE ========================== */

@media (max-width: 549px) {
  .livros {
    grid-template-columns: 1fr;
  }

  .desconto {
    position: static;
    transform: none;
    margin-top: 10px;
    text-align: center;
  }

  .menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (min-width: 550px) and (max-width: 1100px) {
  .livros {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

  .desconto {
    position: static;
    transform: none;
    margin-top: 10px;
    text-align: center;
  }

  .menu {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (min-width: 1101px) {
  .livros {
    grid-template-columns: 1fr 1fr;
  }

  .desconto {
    position: absolute;
    right: -130px;
    top: 50%;
    transform: translateY(-50%);
  }
}