body{font-family:system-ui;background:#f4f6f8;margin:0;color:#16202a}
main{max-width:980px;margin:auto;padding:28px}
.card{background:white;border-radius:12px;padding:20px;margin:16px 0;box-shadow:0 2px 12px #0001}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
input,textarea,select,button{width:100%;box-sizing:border-box;padding:10px;margin-top:5px}
button{background:#0067b8;color:white;border:0;border-radius:6px;font-weight:700;cursor:pointer}
.muted{color:#65717d}
.result{white-space:pre-wrap;background:#0d1117;color:#9ef01a;padding:14px;border-radius:8px;min-height:40px}