*{
    margin:0;
    padding:0;
}
.headfoot{

    border:1px solid rgb(24, 24, 179);
    background-color:rgb(24, 24, 179);
}
header{
    height:50px;
}
footer{
    height:100px;
}
#sec1{
    background-color:black;
    height:180px;
}
#sec2{
    height:350px;
    background:yellow;
    margin:0 70px;
}
.sec2div{
    margin-top:40px;
    height:150px;
    display:inline-block;
    width:33%;
    background:red;
}
.div{
    background: grey;
    height:50px;
    margin:50px 0;
}
#sec3{
    height:350px;
    background:yellow;
    margin:0 70px;
}
.sec3div{
    margin-top:0;
    height:290px;
    display:inline-block;
    width:45%;
    background-color:aquamarine;
}

#sd2{
    margin-left:107px;
    margin-right:0;
}