.hcenter, body
{
    text-align: center;
}

.col-item
{
    display: flex;
}


body
{
    margin: 0;
    box-sizing: border-box;
}

.bg
{
    z-index: -1;
    position: fixed;
    width: 100%;
    height: 100%;
}

.header
{
    padding: 1rem;
}

.container
{
    margin: auto;
    max-width: 50%;
}

.card
{
    margin: 1.1rem;
    border-radius: 1rem;
    padding: 0.5rem;
    text-align: left;
}

.card-mask
{
    background-color: rgba(0, 0, 0, 0.5);
    box-shadow: 0px 0px 0.5rem #a0a0a0;
}

.card-header
{
    margin-bottom: 0.5rem;
    border-bottom: 1px solid #7f7f7f;
    padding: 0.25rem;
    font-size: 2rem;
}

.list>div
{
    padding: 0.25rem;
}

.list>div>*
{
    max-width: max-content;
}

.list>div>.lv2
{
    margin-left: 2rem;
}

.list>div>.lv3
{
    margin-left: 4rem;
}