body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f5f5;
}
header {
  background: #333;
  color: white;
  padding: 10px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.icons span {
  margin-left: 10px;
}
nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 0;
  background: #444;
}
nav li {
  margin: 0 15px;
}
nav a {
  color: white;
  text-decoration: none;
}
main {
  padding: 20px;
}
.pagina {
  display: none;
}
.pagina.ativa {
  display: block;
}
.banner {
  display: flex;
  gap: 20px;
}
.imagem-placeholder {
  width: 50%;
  height: 200px;
  background: #ccc;
}
.texto-banner {
  flex: 1;
}
.grid {
  display: flex;
  gap: 10px;
}
.categoria {
  background: #ddd;
  padding: 20px;
  flex: 1;
  text-align: center;
}
footer {
  display: flex;
  justify-content: space-between;
  background: #eee;
  padding: 20px;
}
.newsletter input {
  padding: 5px;
}
.newsletter button {
  padding: 5px 10px;
}
.social span {
  margin-right: 10px;
}