body { background: #101923; color: #eef4fa; font: 18px system-ui, sans-serif; margin: 0; padding: 24px; }
main { max-width: 640px; margin: 6vh auto; padding: 28px; background: #1b2b3b; border-radius: 12px; }
h1 { font-size: 1.7rem; }
p { line-height: 1.6; }
button { background: #88d9f5; color: #101923; border: 0; border-radius: 6px; padding: 14px; font: inherit; cursor: pointer; }
a { color: #88d9f5; }