.topnav {
  overflow: hidden;
  border-bottom: 2px blue solid;
  margin-bottom: 20px;
}

.topnav a {
  float: left;
  display: block;
  text-align: center;
  padding: 14px 12px;
  color: #00f;
  font-weight: bold;
  text-decoration: none;
  font-size: 17px;
}

.topnav a.active {
  float: left;
  display: block;
  text-align: center;
  padding: 14px 12px 14px 0;
  color: #000;
  font-weight: bold;
  text-decoration: none;
  font-size: 17px;
}

.topnav .icon {
  display: none;
}

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

.dropdown .dropbtn {
  font-size: 17px;    
  border: none;
  outline: none;
  color: #00f;
  font-weight: bold;
  padding: 14px 14px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.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: #00f;
  font-size: 17px;
  font-weight: normal;
  padding: 6px 14px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

.dropdown-content a:hover {
  background-color: #ddd;
  color: #00f;
}

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

.topnav .search-container {
  float: right;
}

.topnav input[type=text] {
  padding: 6px;
  margin-top: 8px;
  font-size: 17px;
  border: 1pt solid gray;
  width: 125px;
}

.topnav .search-container button {
  float: right;
  padding: 6px 10px;
  margin-top: 8px;
  margin-right: 0;
  background: #ddd;
  font-size: 19px;
  border: none;
  cursor: pointer;
}

.topnav .search-container button:hover {
  background: #555;
  color: white;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child), .dropdown .dropbtn, .search-container button, .search-container input {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }

  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {float: none;}
  .topnav.responsive .dropdown-content {position: relative;}
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }

  .topnav.responsive input[type=text], .topnav.responsive .search-container, .topnav.responsive .search-container button {
    float: none;
    display: block;
    width: 100%;
    text-align: left;
    margin: 0;
    padding: 14px;
  }
  .topnav.responsive input[type=text] {
    border: 1px solid #ccc;  
  }
}


.flexwrap {
	display: flex;
	justify-content: space-between;
}

@media only screen and (max-width: 600px) {
  .flexwrap { flex-wrap: wrap; }
}

a.social {
  display: inline-block;
 }


/********** Body of web pages **********/
body {
  margin: 0 10px;
  font-family: Verdana, Geneva, Arial, sans-serif;
  max-width: 900px;
}



/********** Images **********/
.img {
  border-width: 2px;
  border-style: solid;
  margin: 0;
  padding: 0;
}



/********** Page title and section headings **********/
.OASI {
  font-size: 200%;
  font-weight: bold;
  text-align: center;
  color: #00f;
  padding: 0;
  margin: 20px 0 10px 0;
}

.pt {
  font-size: 300%;
  font-weight: bold;
  text-align: center;
  color: #00f;
  padding: 0;
  margin: 20px;
}

h1, h2 {
  font-weight: bold;
  color: #00F;
  margin-top: 20px;
  margin-bottom: 0;
}

h1 {
  font-size: 170%;
}

.h1c {
  font-size: 170%;
  text-align: center;
  font-weight: bold;
  color: #00F;
  margin-top: 20px;
  margin-bottom: 0;
}

h2 {
  font-size: 130%;
}

p {
  font-weight: normal;
  line-height: 115%;
  margin: 10px 0 0 0;
}

.pc {
  font-weight: normal;
  line-height: 115%;
  margin: 10px 0 0 0;
  text-align: center;
}

.p50 {
  margin: 10px 0 0 50px;
}

blockquote {
 font-style: italic;
}

.li6 {
  font-weight: normal;
  line-height: 115%;
  margin: 6px 0 0 0;
}

.li_la {
  font-weight: normal;
  line-height: 115%;
  margin: 6px 20px 0 0;
  list-style-type: lower-alpha;
}

.footer {
  padding: 5px 5px 5px 0;
  border-top: 1px black solid;
  margin: 15px 0 0 0;
  font-size: 8px;
  font-weight: normal;
  color: #000;
  text-align: left;
  clear: both;
}



/********** Tables and cells **********/
.table {
  width: 600px;
  margin: 0;
  padding: 0;
  border-collapse: collapse;
  table-layout: fixed;
}

/********** table header left **********/
.hl {
  padding: 5px 5px 5px 0;
  font-size: 100%;
  font-weight: bold;
  border: 0;
  border-bottom: gray 2px solid;
  text-align: left;
  width: 90px;
}

/********** Table header left centre **********/
.hlc {
  padding: 5px 5px 5px 0;
  font-size: 100%;
  font-weight: bold;
  border: 0;
  border-bottom: gray 2px solid;
  text-align: center;
  width: 90px;
}

/********** table header centre centre **********/
.hcc {
  padding: 5px 5px 5px 5px;
  font-size: 100%;
  font-weight: bold;
  border: 0;
  border-bottom: gray 2px solid;
  text-align: center;
  width: 90px;
}

/********** table header right **********/
.hr {
  padding: 5px 0 5px 5px;
  font-size: 100%;
  font-weight: bold;
  border: 0;
  border-bottom: gray 2px solid;
  text-align: left;
  width: 90px;
}

/********** Table header right centre **********/
.hrc {
  padding: 5px 0 5px 5px;
  font-size: 100%;
  font-weight: bold;
  border: 0;
  border-bottom: gray 2px solid;
  text-align: center;
  width: 90px;
}

/********** Data cell left **********/
.dl {
  padding: 6px 5px 6px 0px;
  font-size: 100%;
  line-height: 115%;
  border: 0;
  text-align: left;
  border-top: gray 1px solid;
}

/********** Data cell left centre **********/
.dlc {
  padding: 6px 5px 6px 0;
  font-size: 100%;
  line-height: 115%;
  border: 0;
  text-align: center;
  border-top: gray 1px solid;
}

/********** Data cell centre **********/
.dcc {
  padding: 6px 5px 6px 5px;
  font-size: 100%;
  line-height: 115%;
  border: 0;
  text-align: center;
  border-top: gray 1px solid;
}

/********** Data cell right **********/
.dr {
  padding: 6px 0 6px 5px;
  font-size: 100%;
  line-height: 115%;
  border: 0;
  text-align: left;
  border-top: gray 1px solid;
}

/********** Data cell right centre **********/
.drc {
  padding: 6px 0 6px 5px;
  font-size: 100%;
  line-height: 115%;
  border: 0;
  text-align: center;
  border-top: gray 1px solid;
}



/********** Reference tables  **********/
.reference {
  width: 100%;
  display: flex;
  padding: 0;
  border: 0;
}

/* For reference style [1] */
.refno1 {
  width: 30px;
  float: left;
  padding: 0 10px 0 0;
}

.refdet1 {
  width: 860px;
  float: left;
  padding: 0;
}

/* For reference style [1] extending beyond [99] */
.refno2 {
  width: 40px;
  float: left;
  padding: 0 10px 0 0;
}

.refdet2 {
  width: 850px;
  float: left;
  padding: 0;
}

/* For reference style [2016a] */
.refno3 {
  width: 70px;
  float: left;
  padding: 0 10px 0 0;
}

.refdet3 {
  width: 820px;
  float: left;
  padding: 0;
}



/********** Divs **********/
.left_div {
  margin: 0;
  padding: 10px 20px 10px 0;
  width: 250px;
  line-height: 1;
  float: left;
}

.centre_div {
  margin: 0;
  padding: 0;
  width: 850px;
  line-height: 1;
  margin-left: auto;
  margin-right: auto;
}

.right_div {
  margin: 0;
  padding: 10px 0 10px 20px;
  width: 250px;
  line-height: 1;
  float: right;
}



/********** Hover over link **********/
a:hover {
  background: #C0C0DF;
}