a:link {
    text-decoration: none;
    color: blue;
}
a:hover {
    text-decoration: underline;
    color: red;
}
a:active {
    text-decoration: underline;
    color: green;
}
a:visited {
    text-decoration: none;
    color: purple;
}
input[type="checkbox"]:checked {
    outline: 2px solid orange;
}
input[type="text"]:disabled {
    background-color: lightgray;
}
#id2:focus {
    border: 2px solid blue;
    background-color: lightyellow;
}
p:nth-child(2) {
    font-weight: bold;
    color: darkgreen;
}