body{font:16px system-ui;max-width:900px;margin:2rem auto;padding:0 1rem;background:#0b1020;color:#eef2ff}button{margin:.3rem;padding:.7rem 1rem}textarea,pre{box-sizing:border-box;width:100%;padding:1rem}textarea{min-height:7rem}pre{white-space:pre-wrap;background:#151d35;border:1px solid #445;padding:1rem;min-height:14rem}.ok{color:#86efac}.bad{color:#fca5a5}