.article {
    text-align: justified; font-size:14.0pt;line-height:130%;font-family:"Calibri",sans-serif;
mso-bidi-font-family:Calibri;mso-bidi-font-style:italic'>
}

div {
    max-width:900px;
    margin: auto;
    padding: 20px;
	background: AliceBlue;
    background-clip: padding-box;
}

h1, h2, h3, h4 {
  color: green;
}

/* Use a media query to add a break point at 800px: */
@media screen and (max-width:800px) {
  .left, .main, .right {
    width:100%; /* The width is 100%, when the viewport is 800px or smaller */
  }
}
.btn {

    border: 0;
    line-height: 2.5;
    padding: 0 20px;
    font-size: 1.3rem;
    text-align: center;
    color: #fff;
	text-decoration: none;
    text-shadow: 1px 1px 1px #000;
    border-radius: 10px;
    background-color: rgba(220, 0, 0, 1);
    background-image: linear-gradient(to top left,
                                      rgba(0, 0, 0, .2),
                                      rgba(0, 0, 0, .2) 30%,
                                      rgba(0, 0, 0, 0));
    box-shadow: inset 2px 2px 3px rgba(255, 255, 255, .6),
                inset -2px -2px 3px rgba(0, 0, 0, .6);
}

.btn:hover {
    background-color: rgba(255, 0, 0, 1);
}

.btn:active {
    box-shadow: inset -2px -2px 3px rgba(255, 255, 255, .6),
                inset 2px 2px 3px rgba(0, 0, 0, .6);
}
body {
  background: AliceBlue;
}
footer {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
}

footer {
  float: left;
}

footer a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

footer a:hover {
  background-color: #111;
}
ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
  width: 900px
  text-align:center;
}

li {
  float: left;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover {
  background-color: #111;
}
}