:root{color-scheme:light;--color-bg: #f4f5f7;--color-card: #ffffff;--color-text: #1a1d21;--color-muted: #5b6470;--color-border: #d7dbe0;--color-primary: #2a5bd7;--color-primary-contrast: #ffffff;--color-error: #b3261e;--color-error-bg: #fdecea;--focus-ring: #2a5bd7}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--color-bg);color:var(--color-text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}.page{display:flex;flex-direction:column;align-items:center;padding:1.5rem 1rem}.card{background:var(--color-card);border:1px solid var(--color-border);border-radius:12px;padding:1.5rem;max-width:32rem;width:100%}.card+.card{margin-top:1rem}h1{font-size:1.5rem;margin:0 0 .5rem}h2{font-size:1.125rem;margin:0 0 .5rem}.amount{font-size:2rem;font-weight:600;margin:.25rem 0 .75rem}.description{color:var(--color-muted)}.field{margin-bottom:1rem}label{display:block;font-weight:600;margin-bottom:.25rem}input[type=text],input[type=email]{width:100%;padding:.6rem .75rem;border:1px solid var(--color-border);border-radius:8px;font-size:1rem;background:var(--color-card);color:var(--color-text)}button{font-size:1rem;font-weight:600;padding:.65rem 1.25rem;border-radius:8px;border:none;background:var(--color-primary);color:var(--color-primary-contrast);cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.pay-button{margin-top:1rem}a{color:var(--color-primary)}:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px}[role=alert],.error-message{background:var(--color-error-bg);color:var(--color-error);border:1px solid var(--color-error);border-radius:8px;padding:.75rem 1rem;margin:0 0 1rem}[role=status]{color:var(--color-muted)}.support-contact{margin-top:.75rem;color:var(--color-muted);font-size:.9rem}@media(max-width:480px){.card{padding:1.1rem}.amount{font-size:1.6rem}}