body {
  margin: 0;
  font-family: Arial, sans-serif;
}
header {
  position: sticky;
  top: 0;
  background: #002663;
  color: #fff;
  display: flex;
  justify-content: space-between;
  padding: 1em;
}
header a {
  color: #fff;
  margin: 0 1em;
  text-decoration: none;
}
.hero {
  height: 80vh;
  background: #004481;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #fff;
  text-align: center;
}
.btn-primary {
  background: #e31837;
  color: #fff;
  padding: 0.8em 1.2em;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1em;
  padding: 2em;
}
.card {
  background: #f0f0f0;
  padding: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.3s;
}
.card:hover {
  transform: translateY(-5px);
}
section {
  padding: 2em 1em;
}
#tokenArea {
  margin-top: 1em;
  font-weight: bold;
  color: green;
}