:root {
  color-scheme: dark;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #2e3a8c;
  color: #fff;
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
}

main {
  min-height: 100vh;
  min-height: 100svh;
  box-sizing: border-box;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  text-align: center;
}

img {
  width: min(240px, 60vw);
  height: auto;
}

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 6vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1::after {
  content: '';
  display: block;
  width: 64px;
  height: 4px;
  margin: 16px auto 0;
  border-radius: 2px;
  background: #ffdc11;
}