form.powermail_form {
                position:relative;
            }
            form.powermail_form.sending::before {
                content:'';
                position:absolute;
                top:0;
                right:0;
                bottom:0;
                left:0;
                background:rgba(255,255,255,0.6);
                z-index:2;
            }
            form.powermail_form.sending::after {
                content: '';
                position: absolute;
                top: 50%;
                left: 50%;
                margin-top: -30px;  
                margin-left: -30px;
                width: 50px;
                height: 50px;
                border-radius: 50px;
                border: 5px solid grey;
                border-top-color: black;
                animation: loading 2s linear infinite;
                z-index:3;
              }
            form.powermail_form.sending.powermail_form_error::before, form.powermail_form.sending.powermail_form_error::after {
                display:none;
            }
            @keyframes loading {
              0% {
                transform: rotate(0deg);
              }
              100% {
                transform: rotate(360deg);
              }
            }