h1 {
    text-align: center;
    background-color: gray;
    border-style: double;
    font-family: 'Courier New', Courier, monospace;
    font-weight: heavy;
    width: 720px;
}

h2 {
    text-align: left;
    background-color: gainsboro;
    border-style: double;
    font-family: 'Courier New', Courier, monospace;
    font-weight: heavy;
    width: 720px;
}

h3 {
    text-align: left;
    background-color: antiquewhite;
    border-style: solid;
    font-family: 'Courier New', Courier, monospace;
    width: 720px;
    margin: auto;
}

p {
    text-align: left;
    background-color: burlywood;
    border-style: dashed;
    font-family: 'Courier New', Courier, monospace;
    font-weight: light;
    font-size: 16px;
    width: 720px;
    margin: auto;
}

body {
    background-color: whitesmoke;
    margin: auto;
    padding: 20px;
    border-style: groove;
    border-width: 10px;
    width: 720px;
}

button {
    margin: auto;
    padding: 20px;
    background-color: green;
    align-self: center;
    width: 720px;
    font-weight: heavy;
    font-size: 24px;
    font-family: 'Courier New', Courier, monospace
}