JSFiddle - React, Tailwind, and code Playground

HTML

<form class="form-wrapper cf">
    <input type="text" placeholder="Eyescoin Address" required />
    <input type="submit" value="Buy" />
</form>

CSS

.cf:before, .cf:after{
        content:"";
        display:table;
      }
      
      .cf:after{
        clear:both;
      }
      
      .cf{
        zoom:1;
      }
      
      
      /* Form wrapper styling */
      .form-wrapper {
        width: 222px;
        padding: 5px;
        margin: 150px auto 50px auto;
        background: #444;
        background: rgba(0,0,0,.2);
        border-radius: 3px;
        box-shadow: 0 1px 1px rgba(0,0,0,.4) inset, 0 1px 0 rgba(255,255,255,.2);
      }
      
      /* Form text input */
      
      .form-wrapper input[type=text] {
        width: 150px;
        height: 0px;
        padding: 10px 5px;
        float: left;
        
        font: bold 12px 'lucida sans', 'trebuchet MS', 'Tahoma';
        border: 0;
        background: #eee;
        border-radius: 3px 0 0 3px;
        
      }
    
    .form-wrapper input[type=text]:focus {
      outline: 0;
      background: #fff;
      box-shadow: 0 0 2px rgba(0,0,0,.8) inset;
    }
    
    .form-wrapper input::-webkit-input-placeholder {
      color: #999;
      font-weight: normal;
      font-style: italic;
    }
    
    .form-wrapper input[type=text]:-moz-placeholder {
      color: #999;
      font-weight: normal;
      font-style: italic;
    }
    
    .form-wrapper input[type=text]:-ms-input-placeholder {
      color: #999;
      font-weight: normal;
      font-style: italic;
    }
    
    
    /* Form submit button */
    .form-wrapper input[type=submit] {
      overflow: visible;
      position: relative;
      float: left;
      border: 0;
      padding: 0;
      cursor: pointer;
      height: 20px;
      width: 62px;
      font: bold 12px/20px 'lucida sans', 'trebuchet MS', 'Tahoma';
      color: #fff;
      text-transform: uppercase;
      background: #1854C4;
      /* 1854C4 = Normal Theme Blue Color */
      border-radius: 0 3px 3px 0;
      
      text-shadow: 0 -1px 0 rgba(0, 0 ,0, .3);
    }
    
    
    .form-wrapper input[type=submit]:hover{
      
   ...