* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    'Source Sans 3',
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
  background: #f8fafc;
  color: #334155;
  line-height: 1.7;
  min-height: 100vh;
}

.header {
  background: linear-gradient(135deg, #6b9ed8 0%, #4a7eb8 100%);
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.header-content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.logo {
  width: 72px;
  height: 72px;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.15));
}

.header h1 {
  color: #fff;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.badge {
  display: inline-block;
  background: #e0ecf7;
  color: #3b6a9e;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  margin-bottom: 2rem;
}

h2 {
  color: #1e3a5f;
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #e2e8f0;
}

h2:first-of-type {
  margin-top: 0;
}

p {
  margin-bottom: 1rem;
  color: #475569;
}

a {
  color: #4a7eb8;
  text-decoration: none;
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

.callout {
  background: #f1f5f9;
  border-left: 4px solid #6b9ed8;
  padding: 1rem 1.25rem;
  margin-top: 2rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.95rem;
}

.footer {
  text-align: center;
  padding: 1.5rem;
  color: #94a3b8;
  font-size: 0.875rem;
  border-top: 1px solid #e2e8f0;
  margin-top: 2rem;
}

@media (max-width: 640px) {
  .header {
    padding: 2rem 1rem;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .logo {
    width: 60px;
    height: 60px;
  }

  .container {
    padding: 1.5rem 1rem 3rem;
  }

  h2 {
    font-size: 1.125rem;
  }
}