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HTML 

              
                <section class="Content">
  <div class="Search">
      <h1 class="mb3 align-center">Wikipedia Viewer</h1>
      <h2 class="align-center">What would you like to read?</h2>
      <form action="">
        <div class="Input-group is-flex">
          <div class="Input-holder">
            <input type="search" class="Input-Search" id="search-input">
              <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="28" height="28" viewBox="0 0 28 28" class="Icon Icon-lens">
                <path d="M31.01 27.23l-7.58-6.45c-0.78-0.7-1.62-1.03-2.3-1 1.79-2.1 2.87-4.82 2.87-7.79 0-6.63-5.37-12-12-12s-12 5.37-12 12 5.37 12 12 12c2.97 0 5.69-1.08 7.79-2.87-0.03 0.68 0.29 1.52 1 2.3l6.45 7.58c1.1 1.23 2.91 1.33 4.01 0.23s1-2.9-0.23-4.01zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8z"/>
              </svg>
          </div>
          <div class="Button-holder">
            <button class="Btn Btn-action Button--search" id="button-search">Search</button>
          </div>
        </div>
      </form>
      <div class="align-center">
        <a target="_blank" href="http://en.wikipedia.org/wiki/Special:Random" class="Btn Btn-action Btn--random" id="btn-random">Random article</a>
      </div>

    </div>

    <div class="Topic">
      <ul class="Topic-items" id="Topic-list">         </ul>
    </div>
  </section>
<footer class="Footer">
  <p class="mb0">Coded and design by <a target="_blank" href="http://gemaderus.com/">Gema de Rus</a></p>
  <span>Photo by </span><a target="_blank" href="http://www.freepik.com">Designed by balasoiu / Freepik</a>
</footer>
!

CSS 

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

*,
*:before,
*:after {
  box-sizing: inherit;
}

ul {
  padding: 0;
  margin: 0;
}

html {
  box-sizing: border-box;
  font-family: 'Montserrat', sans-serif;
  font-size: 62.5%;
  line-height: 1.5;
  position: relative;
  height: 100%;
}

body {
  overflow-x: hidden;
  min-height: 100%;
  background-image: url(https://www.dropbox.com/s/w1jjj5agy6151bm/powerfull.jpg?raw=1);
  background-repeat: no-repeat;
  background-size: cover;
  color: darken(#C3E1E9, 20);
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  line-height: 1;
}

a {
  cursor: pointer;
  text-decoration: none;
}

p {
  margin: 0;
}

.Btn {
  -webkit-appearance: none;
  -moz-appearance:    none;
  appearance:         none;
  background-color: transparent;
  border-radius: 6px;
  border: 0;
  display: inline-block;
  font-family: inherit;
  font-size: 16px;
  line-height: 1;
  margin: 0;
  outline: none;
  padding: 25px 15px;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: 0.25s;
}

.Btn-action {
  background-color: #FF5FAB;
  color: white;

    &:hover {
    background-color: darken(#FF5FAB, 10);
  }
}

.Button-holder {
  flex-basis: 20%;
}

.Button--search {
  border-radius: 0 6px 6px 0;
  width: 100%;
  height: 100%;
}

.Content {
  align-self: center;
  flex: 1;
  max-width: 100%;
  padding: 20px;
}

.Footer {
  font-size: 16px;
  padding: 20px;
  text-align: center;

  a {
    color: #FF5FAB;

    &:hover {
      text-decoration: underline;
    }
  }
}

.Icon {
  display: inline-block;
}

.Icon-lens {
  fill: #929487;
  left: 20px;
  pointer-events: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.Input-group {
  position: relative;

  .Input-holder {
    flex: 1;
  }
}

input[type="search"] {
  box-sizing: border-box;
}

.Input-Search {
  border-radius: 6px 0  0 6px;
  border: 0;
  color: #929487;
  font-size: 20px;
  outline: none;
  padding: 20px 20px 20px 65px;
  width: 100%;
}

body.is-clicked {
  background-image: none;
  background-color: darken(#C3E1E9, 20);
  color: white;
  transition: background-color 0.3s;
}

.is-flex {
  display: flex;
}

.Search {
  max-width: 100%;
  padding: 5rem 0px;

  h1 {
    font-size: 30px;
  }

  h2 {
    font-size: 20px;
  }

  @media screen and (min-width: 600px) {

    h1 {
      font-size: 40px;
    }

    h2 {
      font-size: 30px;
    }
  }

  @media screen and (min-width: 810px) {
    width: 800px;
  }
}

form, h2 {
  margin-bottom: 5rem;
}

.Topic-items {
  color: #929487;
  max-width: 100%;

  @media screen and (min-width: 810px) {
    width: 800px;
  }
}

.Topic-item {
  background-color: white;
  border-radius: 10px;
  margin-bottom: 5rem;
  max-width: 100%;
  padding: 30px;

  h3 {
    border-bottom: 1px solid #ddd;
    font-size: 20px;
    margin-bottom: 30px;
    padding-bottom: 30px;
  }

  p {
    font-size: 16px;
    margin-bottom: 30px;
  }
}

.align-center {
  text-align: center;
}

.align-right {
  text-align: right;
}

.align-right {
  text-align: left;
}

.mb0 {
  margin-bottom: 5px;
}

.mb1 {
  margin-bottom: 1rem;
}

.mb2 {
  margin-bottom: 2rem;
}

.mb3 {
  margin-bottom: 3rem;
}

.mb6 {
  margin-bottom: 6rem;
}
!

JS 

              
                var TEMPLATE = "<li class='Topic-item'><h3 class='Topic-item-title'></h3><p class='Topic-item-text'></p><a href='#' class='Btn Btn-action Btn-link'>Read more</a></li>";

//To search the contents.

$(function() {
  $("#button-search").on("click", function(e) {
    e.preventDefault();
    var searchValue = $("#search-input").val();
    var url = "https://en.wikipedia.org/w/api.php?action=opensearch&search="+ searchValue +"&pwpcontinue&format=json&callback=?"

    if ($.trim(searchValue) === "") {
      e.preventDefault();
    } else {
      search(url);
    }
  });
});

//To get the data

function search(url) {
  $.getJSON(url, handleResponse);
}

//Handler api

function handleResponse(response) {
  var topicsList = response[1];
  var descList = response[2];
  var urlList = response[3];
  background();

  $('#Topic-list').empty();

  topicsList.forEach(function (topicItem, index) {
    var nodo = $(TEMPLATE);
    updateTitle(nodo, topicItem);
    updateText(nodo, descList[index]);
    readMore(nodo, urlList[index]);

    $('#Topic-list').append(nodo);
  });
}

//To get the title

function updateTitle(nodo, data) {
  nodo.find(".Topic-item-title").html(data);
}

//To get the text

function updateText(nodo, text) {
  nodo.find(".Topic-item-text").html(text);
}

function readMore(nodo, url) {
  nodo.find(".Btn-link").attr("href", url);
}

function background() {
  $("body").addClass("is-clicked");
}
!
999px

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