* { box-sizing: border-box; }
body { margin: 0; padding: 16px; font-family: system-ui, sans-serif; color: #211939; background: #faf8ff; }
main { max-width: 480px; margin: 0 auto; }
h1 { margin: 0 0 8px; font-size: 22px; }
p { margin: 0 0 16px; line-height: 1.5; }
canvas { display: block; width: 100%; height: auto; background: #ffffff; outline: 1px solid #b9a8df; }