:root { color-scheme: light; }
body { font: 16px/1.5 system-ui, sans-serif; color: #1a2330; background: #f7f8fa; margin: 0; display: grid; place-items: center; min-height: 100vh; }
main { max-width: 28rem; padding: 2rem; background: #fff; border: 1px solid #e3e7ee; border-radius: 12px; }
h1 { font-size: 1.1rem; margin: 0 0 .75rem; }
p { margin: .4rem 0; }
.klein { color: #5b6677; font-size: .875rem; }