style.css

* {
    padding: 0;
    margin: 0;
}

.header {
    width: 100%;
    position: fixed;
    background-color: #76cdd8;
    padding: 25px 0;
    z-index: 1;
}

.header > nav {
    text-align: center;
}

.header > nav > a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    padding: 0 15px;
    display: inline-block;
    font-size: 20px;
}

.header > nav > a:hover {
    color: #eee;
}

.news {
    padding-top: 90px;
    text-align: center;
}

.news > a {
    display: inline-block;
    width: 500px;
    height: 250px;
    border: none;
    color: white;
    font-weight: bold;
    font-size: 17px;
    text-align: center;
    overflow: auto;
    margin: 10px;
    cursor: pointer;
    text-decoration: none;
}

.news > a:hover {
  opacity: 0.5;
}

.news > a > div {
    height: 100%;
    width: 100%;
}

.showMoreBtn {
    width: 110px;
    height: 40px;
    background-color: #76cdd8;
    border: none;
    color: white;
    font-weight: bold;
    position:relative;
    top:50%;
    left:50%;
    cursor: pointer;
    margin-bottom: 20px;
}