h1 {
    color: red;
}

.highlight {
    color: green;
}

div.box p {
    background-color: yellow;
}

#special {
    text-decoration:underline;
}

ul li {
    border-style: solid;
    color: black;

}

a:hover {
    color: orange;
}

button:active {
    background-color: green;
}

ul > li:first-child {
    color: blue;
}

ol > li:last-child {
    color: red;
}

li:nth-child(odd) {
    background-color: gray;
}

h2::before {
    content: "👉";
}

li::after {
    content: "✔";
}

p::first-letter {
    font-size: 25px;
    color: red;
}

p::first-line {
    background-color: yellow;
}

p::selection {
    background: green;
}