*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f9fafb;color:#111827}.app-main{max-width:900px;margin:0 auto;padding:1.5rem}.page h1{margin-top:0}.error{color:#dc2626}button{font-family:inherit}button.danger{background:#fee2e2;color:#b91c1c;border:1px solid #fca5a5;border-radius:4px;padding:.3rem .6rem;cursor:pointer}button.primary{background:#2563eb;color:#fff;border:none;border-radius:4px;padding:.5rem 1rem;cursor:pointer}input,textarea,select{font-family:inherit;border:1px solid #d1d5db;border-radius:4px;padding:.4rem .6rem}