body {
  font-family: "Arial", sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #f9f9f9;
  color: #333;
}

header {
  background-color: #0077cc;
  color: white;
  padding: 20px 0;
  text-align: center;
}

header h1 {
  margin: 0;
}

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

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 20px;
}

h2 {
  color: #0077cc;
}

.app-list {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.app-item {
  background-color: white;
  border: 1px solid #ddd;
  padding: 15px;
  border-radius: 5px;
  width: 300px;
}

footer {
  text-align: center;
  padding: 10px;
  background-color: #eee;
  color: #555;
  margin-top: 40px;
}