.relative { width:100%; position:relative; }
.error { color:red; }
.price-add { color:red; padding-left:3px; line-height:0; }
.shk-but { margin: 0 4px; }

/* materials */
.materials { padding:5px 0; }
.materials img { width:70px; }
.materials input { cursor: pointer; }

.shk_loading {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    position: absolute;
    z-index: 100;
    background: url(ajax-loader.svg) center center no-repeat;
    background-size: cover;
    display: none;
}