.pwac-install-btn{
  position:fixed; z-index:99999; padding:12px 16px; border-radius:10px; border:none; font-weight:700;
  box-shadow:0 6px 24px rgba(0,0,0,.18); cursor:pointer;
}
.pwac-top{ top:16px; } .pwac-bottom{ bottom:16px; }
.pwac-left{ left:16px; } .pwac-right{ right:16px; }
.pwac-center{ left:50%; transform:translateX(-50%); }

/* Admin tabs */
.pwac-tab{ display:none; }
.pwac-tab.active{ display:block; }
.pwac-help{ margin-top:24px; }