body{margin:0;background:#f5f1e8;color:#233029}.practice-app{width:min(680px,calc(100% - 40px));margin:auto;padding:64px 0}.mode-badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#f5c851;font-weight:900}label{display:grid;gap:6px;margin:14px 0}input,textarea{padding:12px;border:1px solid #aebdb5;border-radius:9px;font:inherit}textarea{min-height:120px}button{padding:12px 18px;border:0;border-radius:10px;background:#0c7656;color:white;font-weight:800}pre{padding:16px;border-radius:12px;background:#1d2924;color:#eff8f3;white-space:pre-wrap}.error{color:#a72b2b}