html{
    height: 100%;
    margin: 0;
    padding: 0;
}
body {
    font-size: 20px;
    font-family: Arial, sans-serif;
    color: white;
    margin-top: auto;
    margin-bottom: auto;
    background-image: url("background.jpg");
}
header {
    background-color: darkorange;
    padding: 5px;
    text-align: center;
    font-size: 35px;
    color: white;
}
nav {
    height: 40px;
}
#menu{
  margin:0 auto;
    background-color: lightgray;
    text-align: center;
    width: 450px;
    height: 40px;
    border-radius: 5px 5px 0px 0px;

} 
#nav{
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-size: 13px;
}
#nav li {
    float: left;
    font-weight: bold;

}
#nav li a {
    display: block;
    color: black;
    text-align: center;
    padding: 10px 5px;
    text-decoration: none;
}
#nav li a:hover {
    background-color: darkorange;
    color: white;
}
footer{
    background-color: darkslategray;
    color: #000;
    text-align: center;
    padding: 10px;
    margin-bottom: auto;
}
#hello h3{
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-weight: bold;
}
.sidebar{
    background-color: lightgray;
    padding: 10px;
    margin-top: 10px;
    border-radius: 5px;
    text-align: center;
    float: right;
}
fieldset {
    text-align: left;
    padding: 5px;
    background-color: #000;
}
legend {
    background-color: #f93;
    border: 1px solid #f00;
    padding: 5px;
    margin-bottom: 5px;
}
section {
    max-width: 600px;
    margin: auto;
}
#content{
    background-color: rgba(0, 0, 0, 0.6);
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    margin-bottom: 20px;
}
chatbox{
    background-color: lightgray;
    padding: 10px;
    margin-top: 10px;
    border-radius: 5px;
    text-align: center;
    float: left;
    width: 200px;
    height: 300px;
    overflow-y: scroll;
}