/***********
 * spinner *
 ***********/
@keyframes spinner {
    0.00% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)); }

    12.5% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)); }

    25.0% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)); }

    37.5% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)); }

    50.0% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)); }

    62.5% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)); }

    75.0% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)); }

    87.5% { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)); }

    100%  { background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                              -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)); }
}

.spinner {
    background-color: transparent;
    background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent));

    background-position: 14% 14%, 0% 50%, 14% 86%, 50% 100%, 86% 86%, 100% 50%, 86% 14%, 50% 0%;
    background-size: 15% 15%;
    background-repeat: no-repeat;
}

.spinner:active {
    background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.875)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.750)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.625)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.500)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.375)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.250)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(alpha(currentColor, 0.125)), to(transparent)),
                      -gtk-gradient(radial, center center, 0, center center, 0.5, to(currentColor), to(transparent));

    animation: spinner 1s infinite linear;
}

.menu.spinner,
.primary-toolbar .spinner {
    color: @selected_bg_color;
}