*{
    margin-left: 1em; /* relative value based on the font size of the parent */
    margin-left: 10px; /*absolute value based on pixels */
    margin-left: 1rem; /* relative value based on the font size of the root document */
}

#square{
    list-style-type: square;
}
.roman{
    list-style-type: lower-roman;
}

body{
    background-color: tan;
    font-family: Arial, Helvetica, sans-serif;
}
article{
    font-family: "Times New Roman", Times, serif;
}
#lorem{
    font-size: 150%;
    color: #0000ff;
}
/*h2+h3{*/
/*    border: 1px solid red;*/
/*}*/
/*h3+ol{*/
/*    border: 1px solid red;*/
/*}*/
h2+h3, h3+ol{
    border: 1px solid red;
}
article p{
    background-color: yellow;
}
article h2+p{
    background-color: pink;
}
a[href="https://my.gblearn.com/"]{
    border: 2px dotted red;
}
a[href="https://www.w3schools.com/"]:hover,a[href="https://www.w3schools.com/"]:focus{
    border: 2px dotted red;
}
#lorem h2::first-letter{
    font-size: 180%;
    color: green;
}
article p:first-child{
    color: red;
}
article p:last-child{
    color: blue;
}
ul li:nth-child(2){
    color: green;
}
header>h1{
    font-size: 250%;
    text-shadow: 4px 3px 4px blue;
}
#wrapper{
    background-color: tan;
    margin: 5em;
    border: 3px solid purple;
}