/* Reset básico e tipografia */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fafafa;
}

/* Cabeçalho */
header {
  background-color: #005a9c;
  color: #fff;
  padding: 20px;
  text-align: center;
}

/* Menu de navegação */
nav {
  background-color: #333;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 10px;
}

nav ul li {
  margin: 0 10px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-size: 14px;
}

nav ul li a:hover {
  text-decoration: underline;
}

/* Conteúdo principal */
main {
  max-width: 900px;
  margin: 20px auto;
  padding: 0 20px;
  background-color: #fff;
}

/* Seções e entradas */
section {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid #ddd;
}

section h2 {
  border-bottom: 2px solid #005a9c;
  padding-bottom: 5px;
  margin-bottom: 20px;
  color: #005a9c;
}

.entry {
  margin-bottom: 20px;
}

.entry h3 {
  margin-bottom: 5px;
  font-size: 18px;
  color: #222;
}

/* Listas */
ul, ol {
  margin-left: 20px;
  margin-top: 10px;
}

/* Rodapé */
footer {
  background-color: #005a9c;
  color: #fff;
  text-align: center;
  padding: 10px;
}

/* Responsividade */
@media (max-width: 600px) {
  nav ul {
    flex-direction: column;
    align-items: center;
  }
  
  nav ul li {
    margin: 5px 0;
  }
}