:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;font-size:18px;color:#111;background:#f7f7f7}button,input,a{font-size:18px}.tool-grid{display:grid;gap:16px;margin-top:16px}.tool-card{display:block;padding:24px;font-size:22px;text-align:center;border:2px solid #2563eb;border-radius:12px;text-decoration:none;color:#2563eb;background:#fff}.tool-card--disabled{padding:24px;font-size:20px;text-align:center;color:#9ca3af;border:2px dashed #d1d5db;border-radius:12px}