body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #1e1e2f;
  color: #ddd;
}

header {
  background-color: #2c2c44;
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid #444;
}

header h1 {
  margin: 0;
}

.subtitle {
  color: #bbb;
  font-style: italic;
  margin-top: 4px;
}

nav {
  margin-top: 15px;
}

nav a {
  color: #eee;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
  font-size: 1.1em;
}

nav a:hover {
  color: #e74c3c;
}

main {
  padding: 20px;
  max-width: 900px;
  margin: auto;
}

h2 {
  margin-top: 0;
}

.rates-list {
  list-style: none;
  padding-left: 0;
}

.rates-list li {
  background-color: #29294a;
  margin: 5px 0;
  padding: 8px 12px;
  border-radius: 4px;
}

.highlight {
  color: #e74c3c;
}

.btn {
  display: inline-block;
  padding: 10px 15px;
  background-color: #e74c3c;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  margin-top: 10px;
}

.btn:hover {
  background-color: #c0392b;
  cursor: pointer;
}

footer {
  text-align: center;
  padding: 15px 0;
  background-color: #2c2c44;
  border-top: 1px solid #444;
  margin-top: 40px;
  font-size: 14px;
  color: #aaa;
}