style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: content-box;
}

body {
  width: 80vw;
  margin: auto;
  margin-top: 30px;
}

.inputKeywordsHandle {
  position: relative;
  display: flex;
}

.inputKeywordsHandle input[type='text'] {
  height: 30px;
  display: inline-block;
  width: 300px;
}

.inputKeywordsHandle ul {
  margin: 0;
  position: absolute;
  top: 30px;
  left: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  width: 300px;
  list-style: none;
}

.inputKeywordsHandle ul li {
  background: #e60228cb;
  opacity: .9;
  height: 30px;
  padding: 5px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: white;
  padding-left: 30px;
  border-bottom : solid 1px white;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.inputKeywordsHandle ul li:last-of-type {
  border-bottom-left-radius: 5px;
  border-bottom-right-radius: 5px;
}

.inputKeywordsHandle ul li:first-of-type {
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
}

.fake-form {
  display: flex;
  flex-direction: column;
}

.fake-form input[type='text'] {
  border-radius: 30px;
  border: solid 1px lightgrey;
  height: 30px;
  padding-left: 20px;
}

.fake-form input[type='submit'] {
  border-radius: 30px;
  border: solid 1px lightgrey;
  height: 30px;
  margin-left: 30px;
  width: 200px;
  background: #f50029cb;
  color: white;
  cursor: pointer;
}

article {
  margin: 20px 0;
  border: solid 1px lightgray;
  padding: 20px;
  width: 24%;
  border-radius: 10px;
}

article h2 {
  color: #f50029cb;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.articlesList {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.keywordsList {
  margin-top: 20px;
  font-size: 14px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}