:root{--background:#fff;--foreground:#171717;--muted:#6b7280;--border:#e5e7eb;--danger:#b91c1c}*{box-sizing:border-box}body{background:var(--background);color:var(--foreground);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}main{max-width:640px;margin:0 auto;padding:3rem 1.5rem}.muted{color:var(--muted)}.error-text{color:var(--danger)}.card{border:1px solid var(--border);border-radius:.5rem;margin-bottom:1rem;padding:1.25rem}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--border);padding:.5rem 0}button{font:inherit;cursor:pointer}