body {
    color: #000;
    margin: 15px 25px 15px 25px;
}
a {
    text-decoration: none;
    color: #00a;
}
a:visited {
    color: #007;
}
#head {
    border: 2px solid #000;
    text-align: center;
}
#head #navigation td a {
    color: #fff;
    font-size: 12pt;
    font-weight: bold;
    font-family: Verdana, Arial, helvetica, sans-serif;
    text-decoration: none;
}
#head #navigation a:visited {
    color: #fff;
    text-decoration: none;
}
#head #navigation a:hover {
    color: #0987f6;
    text-decoration: none;
}
#head #navigation td {
    background-color: #5b5c5c;
    text-decoration: none;
}
.contents {
    margin: 50px 50px 50px 50px;
}
.contents a, a:visited {
    text-decoration: none;
}
.title {
    font-size: 36px;
    color: #007;
    display: block;
    padding: 5px 1px;
    text-decoration: none;
}
p {
    text-align: justify;
    font-size: large;
}
h1, h2 {
    text-align: center;
    color: #007;

}
img {
    border: 0;
}
.capt {
    position: relative;
    text-align: center;
    font-size: 85%;
    float: left;
    display: table-cell

}
img.center {
	float: none; 
	margin-left: auto; 
	margin-right: auto; 
	display: block;
}
.capt2 {
    text-align:center;
    font-size: 85%;
}
dd {
    margin-top: 3px;
    margin-bottom: 10px;
}
.table {
    color: #007;
    font-weight: bold;
    font-size: large;
    margin-left: auto;
    margin-right: auto;
    padding: 10px;
}

.source {
    color: #fff;
    background-color: #36c;
    font-weight: bold;
    font-size: large;
    margin-left: auto;
    margin-right: auto;
    padding: 10px;

}
.source a {
    color: #ccf;
    text-decoration: none;
}
.source a:visited {
    color: #ccf;
    text-decoration: none;
}
.source a:hover {
    color: #ff0;
    text-decoration: none;
}

.exercise a, a:visited {

    text-decoration: none;
}
.exercise a:hover {
    color: #fff;
    background-color: #33a;
    text-decoration: none;
}
.bottombar {
    color: #fff;
    background-color: #5b5c5c;
    text-align: center;
    font-size: large;
    font-weight: bold;
    border: 3px solid #000;
    padding: 3px;
}
.bottombar a {
    color: #fff;
    background-color: #5b5c5c;
    text-decoration: none;
}
.bottombar a:visited {
    color: #fff;
    background-color: #5b5c5c;
    text-decoration: none;
}
.bottombar a:hover {
    color: #0987f6;
    background-color: #5b5c5c;
}
ol.toc a:visited {
    background: yellow;
}
ol.toc a:hover {
    background: yellow;
}
ul#lessons a {
    text-decoration: none;
}
#lessons {
    margin-left: 25%;
    margin-right: 25%;
}

.cssbtn {
    display: inline;
    width: 50px;
    padding: 1px;
    font-size: 9px;
    font-family: Verdana, Geneva, sans-serif;
    text-decoration: none;
    text-align: center;
    color: #333;
    background-color: #ccc;
    border: 1px solid black;
    vertical-align: middle;
    white-space: nowrap;
    cursor: pointer;

}
.cssbtn strong {
    font-weight: bold;
    color: #fff;
    background-color: #226;
    padding-left: 2px;
    margin-right: 5px;
}
.cssbtn:hover {
    color: #fff;
    background-color: #226;
}
.cssbtn:hover strong {
    color: #333;
    background-color: #ccc;
}
p.c3 {
    text-align: center;
}
tr.c1 {
    background: #5b5c5c;
    color: #abacac;
}
table.c2 {
    background: #000033;
}
span.c5 {
    color: #DD0000;
}
span.c4 {
    font-size: 120%;
}
div.c3 {
    background: #000066;
    color: #CCCCFF;
    text-align: center;
}
td.c2 {
    text-align: center;
    background: #000033;
}
td.c1 {
    background: #000033;
    text-align: center;
}
.exercise li {
    bottom-margin: 20px;
}