h1{
    color: #4949f4;
}
h2{
    background-color: #e2ff00;
    color: #a12dde;
    margin: 0px;
}
h3{
    color: #ff003b;
    border-bottom: solid 1px #ff00ff;
    border-left: solid 10px #ff00ff;
}
 h4{
                color: red;
                text-align: center;
                border: solid 1px black;
                background-color: white;
                font-size: 24px;
            }
section{
    border: 1px solid black;
    margin: 10px;
    padding: 20px
}
article{
    border: 4px dotted red;
}
.main{
     width: 750px;
    margin: auto;
    border: 1px solid black;
    background-color: aliceblue;
}