JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css">
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">
<script src="https://fonts.googleapis.com/css?family=Allerta"></script>
    <div class="container-fluid">
        
        <div class="row" id="toppy">
            <h4 class="title">Wikipedia Viewer</h4>
            <h4 class="port">by l-emi</h4>
        </div>
        
        <div id="aligner">
                        
        <div class="row">
          
                <div id="centbox">
                    <div class="row">
                        <button type="button" class="butoni" id="randy">Random article</button>
                    <input type="text" name="search" placeholder="Or search!" class="butoni" id="searchy">
                    </div>
                </div>
            
           
        </div>
        
             <div id="resultati">
                <ul id="output">
                        
                </ul>
            </div>
        </div>

    </div>

CSS

@import url(https://fonts.googleapis.com/css?family=Allerta);

body {
    background-color: #F5F5F5;
    font-family: 'Allerta', sans-serif; 
}

a {
    text-decoration: none !important;
    color: inherit;
}

a:hover {
     color: inherit; 
     text-decoration:none; 
}

div.hidden {
    display: none;
}

#toppy {
    background-color: #F5F5F5;
    height: 2em;
    width: 100%;
    z-index: 1;
    position: fixed;
}

.title {
    position: fixed;
    left: 0;
    margin: 5px;
    color: #584559;
}

.port {
    position: fixed;
    right: 0;
    margin: 5px;
    color: #584559 !important;
    text-decoration: none !important;
}

.port:hover {
    cursor: pointer;
    cursor: hand;
}

#centbox {
    overflow: auto;
    position: absolute;
    display: inline-block;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: table;
    text-align: center;
}

.butoni {
    height: 3em;
    width: 12em;
}

#randy {
    background-color: #584559;
    color: #F5F5F5;
    border: none;
    padding: 0px 15px 0px 15px;
}

#randy:active {
    background-color: #473747;
    color: #F5F5F5 !important;
}


#searchy {
    text-align: center;
    border: solid;
    border-color: #584559 !important;
    border-width: 0.2em;
    padding: 10px;
}


#resultati {
    background-color: #e3e1df;
    padding: 5px;
    margin-top: 3.5em;
    width: 50%;
    position: absolute;
    display: inline-block;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#output {
    position:absolute;
    background-color: #e3e1df;
    width:100%;
    margin-left: -5px;   
}

#aligner {
  clear: both;
}

@media screen and (max-width: 680px) {
    #resultati {
        width: 75%;
    }
}

@media screen and (max-width: 500px) {
    #resultati {
        width: 90%;
    }
}

@media screen and (max-width: 310px) {
    #resultati {
        margin-top: 4.5em;
    }
}

JavaScript

$(document).ready(function () {
    
    
    $(document).keypress(function(e) {
        if(e.which == 13) { 
            
          //$("#resultati").removeClass("hidden");
           
           var searchTerm = $('#searchy').val();
           var url = "https://en.wikipedia.org/w/api.php?action=opensearch&search=" + searchTerm + "&format=json&callback=?";
            
            $.ajax({
                type: "GET",
                url: url,
                contentType: "application/json; charset=utf-8",
                async: false,
                dataType: "json",
                success: function(data){
                    //console.log(data[1][0]);
                    //console.log(data[2][0]);
                    //console.log(data[3][0]);
for (var i = 0; i < data[1].length; i++) {
    $('#output').prepend("<li><a href=" + data[3][i] + ">" +  data[1][i] + "</a><p>" + data[2][i] + "</p></li>");
                    $('#centbox').css("top", "14%");
                    $('#resultati').css("top", "16%");
                }
            },
                error: function(errorMessage){
                alert("Error!");
            }
                
                
                
            })
            
            
            
            
        };
    });
    
    
    
    

    
    $('.port').click(function() {
        window.open("http://codepen.io/l-emi/full/XKgYRr/");
    });
    
    $('#randy').click(function() {
        window.open("https://en.wikipedia.org/wiki/Special:Random");
    });
    
});