#sign {
    font-size: large;
}
#sign input{
    margin: 5px;
    width: 300px;
    height:30px;
}
#sign button{
    margin: 5px;
    width: 50px;
    height: 35px;
}
.click{
    padding: 1px 2px solid pink;
    border: 2px solid #fff;
    outline: 1px solid pink;
}
.over{
    padding: 1px 2px #fff;
    border: 2px solid lightblue;
    outline: 1px solid #fff;
}
#nav{
    position: relative;
    width:100%;
    height:100px;
    background-color: cornsilk;
}
#nav i{
    position: absolute;
    width: 24px;
    height: 24px;
    color:red;
    font-size: 20px;
    font-style: normal;
    outline: 1px solid #ccc;
    text-align: center;
    top:2px;
    right:2px;
}
#nav2{
    position: relative;
    width:100%;
    height:40px;
    text-align: center;
    background-color: pink;
}
#nav2 #xlcd{
    position: absolute;
    width: 15%;
    height:36px;
    background-color: lightblue;
    top:2px;
    margin-left: 2px;
}