body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  background: #f5f7fa;
  color: #333;
}
header, footer {
  background-color: #004aad;
  color: white;
  padding: 1em 2em;
  text-align: center;
}
header h1 {
  margin: 0;
  font-weight: 700;
}
nav a {
  color: white;
  text-decoration: none;
  margin: 0 1em;
  font-weight: 600;
}
nav a:hover {
  text-decoration: underline;
}
main {
  max-width: 900px;
  margin: 2em auto;
  background: white;
  padding: 2em;
  box-shadow: 0 2px 8px rgb(0 0 0 / 0.1);
  border-radius: 8px;
}
h2 {
  color: #004aad;
}
ul.features {
  list-style-type: square;
  padding-left: 1.5em;
}
section {
  margin-bottom: 2em;
}
footer p {
  margin: 0.5em 0 0 0;
  font-size: 0.9em;
  color: #d3d3d3;
}
a.button {
  display: inline-block;
  background-color: #007bfc;
  color: white;
  padding: 0.6em 1.2em;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  margin-top: 1em;
}
a.button:hover {
  background-color: #005bb5;
}