body {
    background-color: ivory;
    font-family: Arial, Helvetica, sans-serif;
    color: black;
    margin: 20px;
}

/* HEADINGS */
h1 {
    text-align: center;
    color: darkred;
    border: 3px solid black;
    background-color: white;
    padding: 10px;
}

h2 {
    text-align: center;
    color: navy;
    text-decoration: underline;
}

h3 {
    text-align: center;
    color: darkgreen;
}

/* TABLE */
table {
    width: 90%;
    margin: 20px auto;
    border-collapse: collapse;
    background-color: white;
}

th {
    border: 2px solid black;
    padding: 10px;
    background-color: lightgray;
    font-size: 18px;
}

td {
    border: 2px solid black;
    padding: 10px;
    text-align: center;
    background-color: #f2f2f2;
}

/* UNORDERED LIST */
ul {
    list-style-type: square;
    border: 2px solid black;
    background-color: white;
    padding: 20px;
    width: 70%;
    margin: 20px auto;
}

/* ORDERED LIST */
ol {
    list-style-type: upper-roman;
    border: 2px solid black;
    background-color: white;
    padding: 20px;
    width: 70%;
    margin: 20px auto;
}

/* DEFINITION LIST */
dl {
    border: 2px solid black;
    background-color: white;
    padding: 20px;
    width: 70%;
    margin: 20px auto;
}

dt {
    font-weight: bold;
    color: darkred;
    font-size: 18px;
}

dd {
    color: gray;
    margin-bottom: 15px;
}