body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #f7f9fc;
  color: #333;
}

header {
  background-color: #0a4d8c;
  color: white;
  padding: 20px 40px;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 999;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  text-align: center;
}

.nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.menu-toggle {
  display: none;
  background: transparent;
  color: white;
  font-size: 24px;
  border: none;
  cursor: pointer;
}

.menu {
  background-color: #0a4d8c;
  padding: 0 30px;
}

.menu ul {
  list-style: none;
  margin: 0;
  padding: 10px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
}

.menu li {
  display: inline;
}

.menu a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 4px;
}

.menu a:hover {
  background-color: #1d5ea8;
}

main {
  padding: 30px 20px;
  max-width: 960px;
  margin: auto;
  background-color: #ffffff;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

section {
  margin-bottom: 50px;
}

h2 {
  border-left: 6px solid #0a4d8c;
  padding-left: 15px;
  margin-bottom: 10px;
  color: #0a4d8c;
}

h3 {
  margin-top: 30px;
  color: #0056b3;
}

ul {
  padding-left: 20px;
}

ul li::marker {
  content: '✔ ';
  color: #0a4d8c;
  font-size: 1.1em;
}

.modulo {
  background: #f1f3f5;
  border-left: 4px solid #0a4d8c;
  padding: 20px;
  margin: 20px 0;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  transition: transform 0.2s ease;
}

.modulo:hover {
  transform: translateY(-3px);
}

.modulo img,
img {
  display: block;
  margin: 15px auto;
  max-width: 100%;
  height: auto;
  border: 1px solid #ccc;
  border-radius: 5px;
}

pre, code {
  background-color: #212529;
  color: #f8f9fa;
  padding: 7px;
  border-radius: 5px;
  font-family: monospace;
  font-size: 0.95em;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
  margin: 10px 0 20px;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  color: #666;
  background-color: #f1f1f1;
  border-top: 1px solid #ddd;
}

/* Responsividade */
@media (max-width: 768px) {
  header {
    padding: 15px 20px;
  }

  .menu {
    padding: 10px 20px;
  }

  main {
    padding: 20px;
  }

  h2 {
    font-size: 1.2rem;
  }

  h3 {
    font-size: 1rem;
  }

  .menu-toggle {
    display: block;
  }

  .menu ul {
    display: none;
    flex-direction: column;
    gap: 10px;
  }

  .menu ul.show {
    display: flex;
  }
}