:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(#4062b0, #2c4690) fixed;
  color: #fff;
  line-height: 1.6;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 18px 48px;
}

article {
  background: #1d2858;
  border: 2px solid #2b386f;
  border-radius: 16px;
  padding: 8px 22px 18px;
  margin: 18px 0;
}

h1 {
  font-weight: 900;
  color: #ffd23a;
}

h2 {
  font-size: 1.1rem;
  margin-top: 1.6em;
}

a {
  color: #8fd8ff;
}

nav {
  font-weight: 700;
}

hr {
  border: 0;
}

.tgl {
  opacity: 0.75;
}