*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f5f5f5;color:#333}.container{padding:3rem;margin:2rem auto;max-width:720px;background:#fff;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.1)}.field{margin:1.25rem 0}.field-label{font-size:.875rem;font-weight:600;color:#666;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.25rem}.field-value{font-size:1rem}.title{font-size:1.5rem;font-weight:600;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid #eee}.text-input{width:75%;padding:.5rem .75rem;font-size:1rem;border:1px solid #ccc;border-radius:4px}.text-input:focus{outline:none;border-color:#111}.btn-primary{padding:.75rem 1.5rem;font-size:1rem;background:#111;color:#fff;border:none;border-radius:4px;cursor:pointer}.btn-primary:hover{background:#333}.btn-primary:disabled{background:#999;cursor:not-allowed}.error-banner{padding:1rem;background:#fef2f2;border:1px solid #fecaca;border-radius:4px;color:#991b1b;margin-bottom:1.5rem}.message-center{text-align:center;padding:2rem 0;color:#666}