body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: url('background.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #1f3a93;
  text-align: center;
}
header {
  background-color: rgba(255, 255, 255, 0.85);
  padding: 20px;
}
.logo {
  width: 130px;
  margin-bottom: 10px;
}
main section {
  margin: 40px auto;
  max-width: 800px;
  background-color: rgba(255, 255, 255, 0.85);
  padding: 20px;
  border-radius: 12px;
}
ul {
  list-style: none;
  padding: 0;
}
.slide {
  width: 100%;
  max-width: 600px;
  display: none;
}
footer {
  padding: 20px;
  background-color: rgba(0, 0, 50, 0.9);
  color: #ffffff;
}
a {
  color: #1f3a93;
  text-decoration: underline;
}