:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,sans-serif}body{margin:0;max-width:640px;margin-inline:auto;padding:1.5rem}nav{display:flex;gap:1rem;margin-bottom:1.5rem;border-bottom:1px solid #8884;padding-bottom:.75rem}nav a{text-decoration:none}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:.4rem .5rem;border-bottom:1px solid #8883}td:last-child,th:last-child{text-align:right}.total{font-size:1.75rem;font-weight:600;margin:.5rem 0 1.25rem}.error{color:#c0392b}.muted{opacity:.7;font-size:.9rem}form.row{display:flex;gap:.5rem;align-items:center}