*{
    /*margin: 1.5em;*/
    /*margin: 10px;*/
    /*margin: 2%;*/
    /*margin: 1rem;*/
    margin: 0;
    padding: 0;
}

#square{
    list-style-type: square;
}
.roman{
    list-style-type: upper-roman;
}
body{
    font-family: Arial, Helvetica, sans-serif ;
    background-color: tan;
}
article{
    font-family: "Times New Roman", Times, serif;
}
#lorem>h2{
    font-size: 200%;
    color: #0000ff;
}
/*h2+h3{*/
/*    border: solid red 2px;*/
/*}*/
/*h3+ol{*/
/*    border: solid red 2px;*/

/*}*/
h2+h3, h3+ol{
    border: solid red 2px;
}
#lorem p{
    background-color: yellow;

}
#lorem h2+p{
    background-color: pink;
}
[href="https://my.gblearn.com/"]{
    border: dotted red 3px;
}
[href="https://www.w3schools.com/"]:hover{
    border: dotted red 3px;
}
[href="https://www.w3schools.com/"]:focus{
    border: dotted red 3px;
}
#lorem h2::first-letter{
    font-size: 250%;
    color: green;
}
#lorem p:last-child{
    background-color: deeppink;
}
ul li:first-child{
    color: red;
}
h3+ol:not(.roman) li:nth-child(2){
    background-color: lightcyan;
}
h3+ol.roman li:nth-child(2n-1){
    border: solid black 3px;
}
header>h1{
    font-size: 550%;
    text-shadow: 4px 3px 4px black;
    color: purple;
}
#wrapper{
    background-color: tan;
    border: purple solid 4px;
    width: 1024px;
    margin: 1em auto;

}
h2, h3, h4, h5, h6{
    color: purple;
}
header, main, footer{
    border: blue 5px dashed;
    padding: 4em;
    margin: 1.5em;

}
.button{
    text-decoration: none;
    border: solid purple 4px;
    padding: 8px;
    border-radius: 20px;
    background-image: linear-gradient(rebeccapurple, violet);
    color: bisque;
    box-shadow: 4px 4px 6px blue;

}
nav{
    margin: 2em;
    position: sticky;
    top: 18px;

}
header{
    background-image: url("../img/ahmed-abbas-rL-UGnNVy-Q-unsplash.jpg");
    background-size: cover;
    background-position: center;
    text-align: center;
}
figure{
    overflow: hidden;
}
figure>img{
    width: 838px;
    border: 4px black solid;
    padding: 10px;
    margin: 5px;
    box-sizing: border-box;

}