body {
  font-family: Arial, Helvetica, sans-serif;
  background: #101822;
  color: #f5f7fa;
  margin: 0;
  padding: 0;
}

header {
  background: #1b2a3a;
  padding: 2rem 1.5rem;
  text-align: center;
  border-bottom: 2px solid #2f4358;
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

header p {
  margin-top: 0.5rem;
  color: #a9b7c6;
}

main {
  max-width: 720px;
  margin: 2rem auto 4rem;
  padding: 0 1.5rem;
}

.version-card {
  background: #182636;
  border: 1px solid #2a3d53;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.version-card h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.4rem;
}

.version-card p {
  margin: 0.25rem 0 1rem 0;
  color: #c2cfde;
}

.version-card a {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  background: #3a85e1;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease;
}

.version-card a:hover,
.version-card a:focus {
  background: #2f6bb3;
}

footer {
  text-align: center;
  color: #7b8ba1;
  padding: 2rem 1.5rem;
}