body {
    background-color: darkslategray;
    font-family: sans-serif;
    color: aliceblue;
}
h2 {
    color:aliceblue;
    margin-left: 40px;
    font-weight: bold;
}

blockquote {
    font-style: italic;
}

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
  }

aside.right {
    float: right;
    right: 10px;
    width: 100px;
    padding: 10px;
    margin: 10px;
    box-shadow: inset 5px 0 5px -5px #29627e;
    font-style: italic;
    color: #29627e;
    display: table-cell;
  }

  aside.left {
    float: left;
    width: 100px;
    left: 10px;
    padding: 10px;
    margin: 10px;
    box-shadow: inset 5px 0 5px -5px #29627e;
    font-style: italic;
    color: #29627e;
    display: table-cell;
}

aside > span {
    font-size: larger;
    font-style: italic;
    color:slateblue;
}