.checkbox
{
    display: inline-block;
    vertical-align: top;
    position: relative;
    padding-bottom: 0.5em;
    padding-top: 0.5em;
}

.checkbox input
{
    position: absolute;
    left: 0;
    top: 0.75em;
}

.checkbox-label-body {
    font-weight: normal;
    margin-left: 2rem;
}

.center-button 
{
    text-align: center;
} 

.right-link 
{
    float: right;
    padding-top: 8px;
}

.error-message
{
    font-size: 12px;
}

.error-message b
{
    color: red;
}

#small-message
{
    color: #000;
    position: relative;
}

.invalid
{
    color: #000;
    text-decoration: none;
}

.valid
{
    color: rgb(13, 184, 13);
    text-decoration: line-through;
}

#model-preview {
    width: 186px;
}

@media (min-width: 0)
{
    .header
    {
        margin-top: 2em;
        margin-bottom: 2em;
        text-align: center;
    }

    #content
    {
        margin: 0px 5% 0px 5%;
    }

    footer
    {
        padding-top: 1em;
        padding-bottom: 2em;
    }

    footer img
    {
        display: block;
        margin-left: auto;
        margin-right: auto;
        width: 128px;
    }
}

@media (min-width: 600px)
{
    .header
    {
        margin-top: 4em;
        margin-bottom: 3em;
        text-align: center;
    }

    #content
    {
        margin: 0px 15% 0px 15%;
    }

    footer
    {
        padding-top: 1em;
        padding-bottom: 2em;
    }

    footer img
    {
        display: block;
        margin-left: auto;
        margin-right: auto;
        width: 128px;
    }
}

@media (min-width: 1200px)
{
    .header
    {
        margin-top: 4em;
        margin-bottom: 3em;
        text-align: center;
    }

    #content
    {
        margin: 0px 33% 0px 33%;
    }

    footer img
    {
        width: 128px;
    }

    footer
    {
        position: fixed;
        left: 0;
        bottom: 0;
        margin: 0;
        padding: 0;
        padding-left: 32px;
        padding-bottom: 24px;
    }
}