body{font-family:Arial,sans-serif;background:#0f172a;color:#fff;margin:0}.container{max-width:900px;margin:auto;padding:30px}h1{text-align:center}.subtitle{text-align:center;margin-bottom:30px;color:#94a3b8}.tool{background:#1e293b;padding:20px;margin-bottom:30px;border-radius:10px}textarea,input,select{width:100%;margin-top:10px;margin-bottom:10px;padding:10px;border-radius:6px;border:none}button{margin-right:10px;padding:10px 15px;background:#3b82f6;border:none;border-radius:6px;color:#fff;cursor:pointer}button:hover{background:#2563eb}.api-row{display:flex;gap:10px}