* {
  margin: 5px;
  padding: 0;
}
body {
  color: teal;
  background-color: #CE5252;
  background-image: url(https://spring0nion.neocities.org/springonion2.png);
  font-family: 'Comic Sans MS', sans-serif;
}
header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 0px;
  position: relative;
}
 h2 {
  color: goldenrod;
  text-align: center;
 }
 a {
   color: palevioletred;
   text-decoration: none;
 }
 footer {
   text-align: center;
 }
p {
   margin: 32px;
  }
  
/* flexbox */
.page-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 10px;
  gap: 10px;
  flex-wrap: wrap;
}
/* sidebar */
.navegacao {
  width: max-content;
  padding: 15px;
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
  font-size: 18px;
}
/* conteudo principal */
.main-content {
  width: 700px;
  padding: 20px;
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  font-size: 18px;
}
/* sidebar */
.contatos {
  width: max-content;
  padding: 15px;
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
  font-size: 18px;
  }
/* menu */
nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
nav li {
  margin: 10px 0;
}
/* Links */
a {
  text-decoration: none;
  color: palevioletred;
}
/* Responsividade */
@media (max-width: 768px) {
  .page-container {
    flex-direction: column;
    align-items: center;
  }
  .sidebar, .main-content {
    width: 90%;
  }
}
nav ul {
  list-style: none;
  padding: 0;
}
nav li {
  margin: 10px 0;
}