body {
  font-family: sans-serif;
  background: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.login-container {
  background: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}
input, button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
}
.erro {
  color: red;
}
.aviso {
  font-size: 12px;
  color: #888;
  text-align: center;
  margin-top: 15px;
}
.logout-link {
  display: inline-block;
  margin-top: 20px;
  background: #007bff;
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 5px;
}