:root {
  color-scheme: dark;
  font-family: system-ui, sans-serif;
  background: #020a1a;
  color: #f3f7fb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 2rem;
}
main { text-align: center; max-width: 36rem; }
img { display: block; max-width: 100%; height: auto; margin: 0 auto 1.5rem; }
.brand { color: #b8c8dd; font-size: 1.1rem; letter-spacing: .04em; }
h1 { font-size: clamp(1.8rem, 7vw, 3rem); line-height: 1.2; }