body {
    font  : 1.3rem sans-serif;
    padding : 0.5em;
    margin  : 0;
    background : #222;
}

#main-container {
    /* Just to center the form on the page */
    margin: 0 auto;
    max-width: 600px;
    width: 80%;
    /* To see the outline of the form */
    padding: 1em;
    border: 2px solid #ccc;
    border-radius: 1em;
    background-color: lightslategray;
}

img {
    margin: 0 auto;
    width: 300px;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

li {
    margin-top: 0.5em;
}

label {
    /* To make sure that all labels have the same size and are properly aligned */
    display: block;
    text-align: left;
}

input,
textarea {
    /* To make sure that all text fields have the same font settings By default, textareas have a monospace font */
    font: 1em sans-serif;
    /* To give the same size to all text fields */
    width: 90%;
    box-sizing: border-box; /* To harmonize the look & feel of text field border */
    border: 1px solid #999;
}

textarea:read-only {
    color: dimgray;
    background-color: lightgray;
}

input:focus,
textarea:focus {
    /* To give a little highlight on active elements */
    border-color: #000;
}

#results {
    vertical-align: top;
    height: 6em;
}