body {
  background-image: url("images/background.jpg");
  height: 2%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  background-attachment: fixed;
  background-color: #000000;
  margin-top: 40;
  margin-bottom: 60;
  margin-right: 200;
  margin-left: 200;
}

.serif {
  font-family: "Times New Roman", Times, serif;
}

.sansserif {
  font-family: Arial, Verdana, sans-serif;
}

.monospace {
  font-family: "Lucida Console", Courier, monospace;
}

* {
  box-sizing: border-box;
}

div.a {
  text-indent: 50px;
}

.header {
  background-color: #f1f1f1;
  padding: 20px;
  text-align: left;
  opacity: 0.7;
}

.navbar {
  overflow: hidden;
  background-color: #333;
  opacity: 1.0;
}

.navbar a {
  float: right;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.dropdown {
  float: right;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;  
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.navbar a:hover, .dropdown:hover .dropbtn {
  background-color: #ddd;
  color: black;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.dropdown-content a:hover {
  background-color: #ddd;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.column {
  float: left;
  padding: 10px;
}

.column.side {
  width: 25%;
}

.middle {
  background-color: rgba(241, 241, 241, 0.8);  
  width: 100%;
  float: left;
  padding: 40px;
  text-justify: auto;
}

p {
   text-indent: 2em;
   text-align: justify;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

@media screen and (max-width: 600px) {
  .column.side, .column.middle {
    width: 100%;
  }
}

.img-responsive  {
  max-width: 100%;
  height: auto;
  display: block;
  opacity: 1;
}

.footer {
  background-color: #f1f1f1;
  padding: 10px;
  text-align: center; 
  opacity: 0.8;
}