*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #4a5568;
  background: #f4f6f8;
}

a {
  color: #1a9e96;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: #0c1b2e;
  color: #fff;
  padding: 1.25rem 1.5rem;
}

.site-header__inner {
  max-width: 42rem;
  margin: 0 auto;
}

.site-header__brand {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-header__tagline {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: #a8b8cc;
}

.site-nav {
  margin-top: 1rem;
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: #5ecfc8;
  font-size: 0.9375rem;
  font-weight: 500;
}

.site-nav a[aria-current="page"] {
  color: #fff;
  text-decoration: none;
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem;
}

.card {
  background: #fff;
  border-radius: 0.75rem;
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 3px rgba(12, 27, 46, 0.08);
}

.card h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 600;
  color: #0c1b2e;
  line-height: 1.25;
}

.card h2 {
  margin: 1.75rem 0 0.75rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: #0c1b2e;
}

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

.card p {
  margin: 0 0 1rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.card ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.card li {
  margin-bottom: 0.35rem;
}

.lead {
  font-size: 1.0625rem;
  color: #2d3748;
}

.email-link {
  font-weight: 500;
  word-break: break-all;
}

.btn {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: #1a9e96;
  color: #fff !important;
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: 0.5rem;
  text-decoration: none;
}

.btn:hover {
  background: #158a83;
  text-decoration: none;
}

.site-footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.5rem 2rem;
  text-align: center;
  font-size: 0.8125rem;
  color: #718096;
}

@media (min-width: 600px) {
  .site-header {
    padding: 1.5rem 2rem;
  }

  main {
    padding: 2rem 1.5rem;
  }

  .card {
    padding: 2rem 2.25rem;
  }
}