body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: #f6f8fb;
  color: #1f2937;
  margin: 0;
  padding: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  background: #0f172a;
  color: #fff;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.nav a {
  color: #cbd5e1;
  text-decoration: none;
  margin-left: 18px;
}

.nav a:hover {
  color: #fff;
}

.container {
  max-width: 960px;
  margin: 48px auto;
  padding: 0 24px;
}

.container.narrow {
  max-width: 600px;
}

.hero {
  background: #ffffff;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: #64748b;
  margin-bottom: 10px;
}

h1 {
  margin-top: 0;
  color: #0f172a;
}

.lead {
  font-size: 1.05rem;
  line-height: 1.7;
  color: #475569;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.info-card,
.summary-card {
  background: #ffffff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

button,
.button-link {
  background-color: #2563eb;
  color: #ffffff;
  border: none;
  padding: 12px 16px;
  font-size: 1em;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button:hover,
.button-link:hover {
  background-color: #1d4ed8;
}

.button-link.secondary {
  background: #e2e8f0;
  color: #0f172a;
}

.button-link.secondary:hover {
  background: #cbd5e1;
}

form {
  margin-top: 24px;
}

label {
  display: block;
  margin-bottom: 16px;
}

input {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  font-size: 1em;
}

.code-block {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  white-space: pre-wrap;
}

.link-list {
  padding-left: 20px;
}

.footer-note {
  margin-top: 28px;
  font-size: 0.9em;
  color: #6b7280;
}