:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5}body{margin:0;background:#f4f1ec;color:#2b2b2b}.page{max-width:640px;margin:0 auto;padding:2.5rem 1.25rem 4rem}h1{font-size:1.6rem}.message{background:#fff;border:1px solid #ddd;border-radius:12px;padding:1.25rem 1.5rem;margin-bottom:1.25rem}.message h2{margin-top:0;font-size:1.1rem}.letter{font-size:1.05rem}.actions{display:flex;flex-direction:column;gap:.6rem;margin-top:1.5rem}button{padding:.8rem 1rem;font-size:1rem;border-radius:10px;border:1px solid #c9c2b6;background:#fff;cursor:pointer}button:first-child{background:#2f6b4f;border-color:#2f6b4f;color:#fff}.footer{margin-top:3rem;text-align:center;color:#777;font-size:.9rem}