body{
    margin: 0px;
    padding: 0px;
    width: 100%;
    background-color: rgb(235, 235, 235);
}
.nav{
    margin-top: 0;
    width:1100px;
    height: 50px;
    margin-left: 300px;
}
.logo{
    float: left;
}
h2{
    line-height: 50px;
}
.nav a:link,a:visited{
    position:absolute;
    top: 40px;
    right: 410px;
    text-decoration: none;
    color: black;
}
.a1{
    width: 120px;
    height: 30px;
    display: inline-block;
    font-size: 20px;
    font-weight: bold;
    margin-top:50px;
    margin-left: 60px;
}
.a2{
    width: 120px;
    height: 30px;
    display: inline-block;
    font-size: 20px;
    font-weight: bold;
    margin-top:50px;
    margin-left: 410px;
}
.a3{
    font-size: 20px;
    font-weight: bold;
    margin-top:50px;
    margin-left: 410px;
    display: inline-block;
}
.a4{
    font-size: 20px;
    font-weight: bold;
}
.a5{
    font-size: 20px;
    font-weight: bold;
    color: red;
}
.a6{
    width: 500px;
    height: 30px;
    display: inline-block;
    font-size: 20px;
    font-weight: bold;
    margin-top: 20px;
    margin-left: 410px;
}
hr{
    width: 1100px;
    text-align: center;
}
.input1{
    width: 300px;
    height: 30px;
}
table{
    width: 800px;
    height:20px;
    border: 1px solid #000;
    border-collapse: collapse;
    margin-left: 500px;
}
th,td{
    border: 1px solid #000;
}
caption{
    font-size: 24px;
}
table input{
    height: 80px;
    background-color: rgb(235, 235, 235);
}
.btn1{
    width: 200px;
    height: 50px;
    background-color: rgb(168, 219, 190);
    font-size: 20px;
    margin-left: 800px;
    margin-top: 20px;
}