body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;background:#fafafa;color:#111}
.container{max-width:980px;margin:24px auto;padding:0 16px}
.sub{color:#444;margin-top:-8px}
label{display:block;margin-top:14px;font-weight:600}
textarea,input,select,button{width:100%;padding:10px;margin-top:6px;font-size:14px;border:1px solid #ddd;border-radius:8px;background:#fff}
button{cursor:pointer;font-weight:700;margin-top:14px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
pre{background:#fff;border:1px solid #eee;border-radius:10px;padding:12px;overflow:auto;min-height:40px}
.ok{padding:10px;background:#eaffea;border:1px solid #b6f2b6;border-radius:10px;margin-top:12px}
.warn{padding:10px;background:#fff4db;border:1px solid #ffd27a;border-radius:10px;margin-top:12px}