Centering A Button

I am trying to make the Continue button wider and also to center it.  Need help!

.btnC {
          border: 1px solid #2864a0;
         border-radius:4px;
         padding: 6px 12px;
         max-width:200px;
         color: #fff;
           background-color:#2864a0;
         font-size: 18px;
           cursor: pointer;
      }
      .btnC:hover {
          border: 1px solid #33af56;
         background: #33af56;
         color: white;
      }

Select allOpen in new window

https://arise.plus/Join-Us.php