body {
  font-family: 'Tahoma', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5f5f5;
  color: #333;
}
header {
  background-color: #006e63;
  color: white;
  text-align: center;
  padding: 20px;
}
.logo {
  max-width: 120px;
  margin-bottom: 10px;
}
main {
  padding: 20px;
}
section {
  margin-bottom: 20px;
}
ul {
  list-style: square;
  padding-right: 20px;
}
.btn {
  background-color: #00796b;
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
}
footer {
  text-align: center;
  padding: 15px;
  background-color: #ddd;
}