body {
  padding: 2rem;
  font-family: "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background-color: #0f172a;
  color: #f1f5f9;
  line-height: 2; /* generous spacing between lines */
}

.card {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px;
  background-color: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

h1 {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 24px;
  color: #f8fafc;
}

.tagline {
  font-size: 18px;
  font-weight: 500;
  color: #cbd5e1;
  margin-bottom: 32px;
}

h2 {
  font-size: 28px;
  font-weight: bold;
  margin-top: 48px;
  margin-bottom: 16px;
  color: #e2e8f0;
}

p {
  font-size: 17px;
  margin-bottom: 24px; /* one-line spacing */
}

ul {
  padding-left: 24px;
  margin-bottom: 24px;
}

li {
  font-size: 17px;
  margin-bottom: 16px; /* one-line spacing */
}

.footer {
  font-weight: bold;
  font-size: 17px;
  margin-top: 48px;
  text-align: center;
  color: #f8fafc;
}