* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: monospace;
}

header {
    background-color: #333;
    color: lightgray;
    padding: 10px 0;
    text-align: center;
    font-size: 50px;
    font-family: 'Courier New', Courier, monospace;
}

html {
    background-color: lightgray;
}

footer {
    background-color: #333;
    color: lightgray;
    padding: 20px 0;
    text-align: center;
    margin: 20px 0 0 0;
}

#mainbox {
    padding: 40px;
    margin: 30px auto;
    min-width: 100px;
    max-width: 450px;
    overflow: scroll;
    /*width: 450px;
    height: 400px;*/
    border: 4px dashed rgb(120, 120, 120);
    color: #333;
    border-radius: 25px;  
    opacity: 80%;
    text-align: center;
    font-size: 20px;

}