:root{color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f3f4f6;color:#1f2937}body{margin:0;min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding:2rem 1rem;box-sizing:border-box}main{width:100%;max-width:480px}paydone-checkout{margin:0 auto;box-shadow:0 1px 3px #00000014}h1{font-size:1.4rem}h1:focus{outline:none}.note{text-align:center;color:#4b5563}