index.css

html,body,.root {
    display: flex;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    background-color: gainsboro;
}

.content {
    box-sizing: border-box;
    background-color: white;
    height: 500px;
    display: flex;
    width: 100%;
    justify-content: end;
    flex-direction: column;
    padding: 30px;
}

.content .common-words {
    position: relative;
    flex-direction: row;
    display: flex;
    font-size: 12px;
}

.content .common-words-manager-btn {
    background-color: #ecf5ff;
    color: #409EFF;
    display: inline-block;
    border: 1px solid #d9ecff;
    border-radius: 2px;
    font-size: 12px;
    min-width: 80px;
    min-height: 30px;
}

.content .common-words-manager-btn:hover {
    cursor: pointer;
}

.content .chat-input {
    margin-top: 10px;
    width: 100%;
    height: 80px;
    border: 1px solid gainsboro;
    border-radius: 5px;
    outline: none;
}

.common-words-manager {
    display: flex;
}

.common-words-create {
    display: flex;
}

.common-words-create span {
    display: flex;
    align-items: center;
    color: #409EFF;
}

.common-words-create span:first-child {
    margin-left: 5px;
}

.common-words-create span:last-child {
    margin-right: 5px;
}

.common-words-create input {
    border: 1px solid gainsboro;
    border-radius: 5px;
    outline: none;
}

.common-words-list {
    font-size: 12px;
    max-width: 150px;
    background-color: rgb(249, 250, 250);
    border: rgb(249, 250, 250) solid 1px;
    box-shadow: 0px 2px 2px rgb(249, 250, 250);
    border-radius: 3px;
    padding: 5px;
    position: absolute;
    top: -85px;
}

.common-words-list .list-header {
    color: rgb(173, 172, 172);
}

.common-words-list .list-footer {
    color: rgb(173, 172, 172);
    font-size: 8px;
    -webkit-transform-origin-x: 0;
    -webkit-transform: scale(0.80);
}

.common-words-list > ol {
    padding-left: 5px;
}

.common-words-list > ol > li {
    list-style-type: none;
    padding-left: 3px;
    padding-top: 3px;
    min-height: 20px;
}

.list-item-selected {
  background-color: #70b2f5;
  border-radius: 3px;
  color: white;
}