$text: #222;
$bg: #fff;
$border: #c0c0c0;
$wait: "Loading...";
$radius: .4em;

.box1 {
    font-size:1em;
    color:$text;
    display:block;
    max-width:100%;
    border:1px solid $border;
    border-radius:$radius;
    margin:1em auto;
    padding:.5em;
    background-color:rgba( $bg, .8 );
}
.box1.loading {
    position:relative;
    overflow:hidden;
}
.box1.loading::after {
    content: $wait;
    position:absolute !important;
    width:100%;
    height:100%;
    left:0;
    right:0;
    top:0;
    bottom:0;
    background-color:rgba( $bg, .6 );
    text-align:center;
    color:rgba( $text, .7 );
    line-height:7em;
    font-size:2.05em;
}