body {
    font-size: 16px;
    font-family: sans-serif;
    width: 56em;
    margin-top: 0;
    margin-bottom: 0;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    background-color: #999;
}

div.main {
    margin-top: 0;
    margin-bottom: 0;
    background-color: #CCC;
    border-radius: .5em;

    padding: 1em;
}

.recentprints ul {
    list-style-type: none;
}

h3 {
    margin: 0;
}

p.error {
    color: red;
    font-size: 2em;
}

form.fileupload {
    border: 1px solid black;
}

.flash-error {
    padding: 1em;
    font-size: 1.5em;
    background-color: #ff7287;
    border-radius: .5em;
    border: 1px solid black;
}

.flash-success {
    padding: 1em;
    font-size: 1.5em;
    background-color: #72ff93;
    border-radius: .5em;
    border: 1px solid black;
}

body {
    font-size: 16px;
    font-family: sans-serif;
    width: 56em;
    margin-top: 0;
    margin-bottom: 0;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    background-color: #999;
}

div.main {
    margin-top: 0;
    margin-bottom: 0;
    background-color: #CCC;
    border-radius: .5em;

    padding: 1em;
}

.recentprints ul {
    list-style-type: none;
}

h3 {
    margin: 0;
}

p.error {
    color: red;
    font-size: 2em;
}

form.fileupload {
    border: 1px solid black;
}

.flash-error {
    padding: 1em;
    font-size: 1.5em;
    background-color: #ff7287;
    border-radius: .5em;
}

.flash-success {
    padding: 1em;
    font-size: 1.5em;
    background-color: #72ff93;
    border-radius: .5em;
}

Remove flash message black borders
Remove flash message black borders
