body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, 'Liberation Sans', sans-serif;
  background: #f7fafd;
  color: #223;
  margin: 0;
  padding: 0;
}

header {
  background: #fff;
  padding: 24px 0 8px 0;
  text-align: center;
  box-shadow: 0 2px 6px rgba(38,99,235,0.08);
}

.logo {
  width: 80px;
  margin-bottom: 8px;
}

h1 {
  margin: 0;
  font-size: 2.3rem;
  color: #2563eb;
  letter-spacing: -2px;
}

.tagline {
  margin-top: 2px;
  color: #e63946;
  font-weight: 500;
  font-size: 1.12rem;
  margin-bottom: 6px;
}

nav {
  margin: 12px 0 4px 0;
}
nav a {
  margin: 0 12px;
  color: #2563eb;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.04rem;
}
nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 600px;
  margin: 2.2rem auto 2.5rem auto;
  padding: 0 18px;
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 1px 7px 1px #dae2ff55;
}

h2 {
  color: #2563eb;
  font-size: 1.45rem;
  margin-top: 0.4em;
}

.features ul {
  padding-left: 1.4em;
  margin-top: 0.6em;
  margin-bottom: 0.9em;
}
.features li {
  margin-bottom: 0.55em;
}

.callout {
  background: #e7f5ff;
  border-left: 5px solid #2563eb;
  color: #133a4e;
  padding: 12px 18px;
  border-radius: 10px;
  margin: 1.1em 0 1.6em 0;
  font-size: 1.06rem;
}

.contact {
  margin-top: 1.6em;
  font-size: 1.05rem;
}

footer {
  margin-top: 2em;
  text-align: center;
  color: #aaa;
  font-size: 0.97rem;
  padding-bottom: 24px;
}

@media (max-width: 700px) {
  main { margin: 1.1rem 4px 1.6rem 4px; }
  .logo { width: 58px; }
}