body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  text-align: center;
  padding: 15vh 1rem 2rem;
}

h1 {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3em;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1;
  margin-bottom: 1rem;
  color: rgba(0, 0, 128, 1);
}

h1 .logo {
  width: 0.72em;
  height: 0.72em;
  border-radius: 0.2em;
}

p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  margin: 0 auto 2rem;
  opacity: 0.92;
}

.tagline span {
  display: block;
}

a.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  margin: 4rem 0;

  background: rgba(0, 0, 128, 1);
  color: #fff;

  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;

  text-decoration: none;
  font-weight: 600;

  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
}

a.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 128, 0.25);
}

a.button:focus-visible {
  outline: 3px solid rgba(0, 0, 128, 0.4);
  outline-offset: 4px;
}

footer {
  margin-top: 4rem;
  font-size: 0.75rem;
  opacity: 0.7;
}