body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: white;
    margin: 1em auto;
    width: 700px;
    padding: 0 2em 1em;
    border: 1px solid black;
    border-radius: 1em;
}
h1 {
    color: cornflowerblue;
    font-size: 150%;
    margin-bottom: .5em;
}
div {
    margin-bottom: 1em;
}
input {
    width: 20em;
    margin-bottom: .5em;
}
#tasks {
    margin-top: 0;
    float: right; 
    width: 24em;
    min-height: 5em;
}
#message {
    color: red;
    font-weight: bold;
}