ul {
  list-style-type: none;
}

li {
  line-height: 1.5;
}
a {
  color: black;
}

body {
    margin : 0;
}

.outer-container {
    position : absolute;
    display: table;
    width: 100%;
    height: 100%;
    background: #ccc;
}

.inner-container {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

.centered-content {
    display: inline-block;
    text-align: left;
    background: #fff;
    padding : 20px;
    border : 1px solid #000;
    cursor:pointer;
}
.centered-content:hover{
  background: darkred; /* make this whatever you want */
}