/*-----------------------------------------------
	css loader (slack style)
-----------------------------------------------*/

.loader {
    position: relative;
    width: 5em;
    height: 5em;
    transform: rotate(165deg);
}

    .loader:before,
    .loader:after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        display: block;
        width: 1em;
        height: 1em;
        border-radius: 0.5em;
        transform: translate(-50%, -50%);
    }

    .loader:before {
        animation: slackbefore 2s infinite;
    }

    .loader:after {
        animation: slackafter 2s infinite;
    }

@keyframes slackbefore {
    0% {
        width: 1em;
        box-shadow: 2em -1em rgba(225, 20, 98, 0.75), -2em 1em rgba(111, 202, 220, 0.75);
    }

    35% {
        width: 5em;
        box-shadow: 0 -1em rgba(225, 20, 98, 0.75), 0 1em rgba(111, 202, 220, 0.75);
    }

    70% {
        width: 1em;
        box-shadow: -2em -1em rgba(225, 20, 98, 0.75), 2em 1em rgba(111, 202, 220, 0.75);
    }

    100% {
        box-shadow: 2em -1em rgba(225, 20, 98, 0.75), -2em 1em rgba(111, 202, 220, 0.75);
    }
}

@keyframes slackafter {
    0% {
        height: 1em;
        box-shadow: 1em 2em rgba(61, 184, 143, 0.75), -1em -2em rgba(233, 169, 32, 0.75);
    }

    35% {
        height: 5em;
        box-shadow: 1em 0 rgba(61, 184, 143, 0.75), -1em 0 rgba(233, 169, 32, 0.75);
    }

    70% {
        height: 1em;
        box-shadow: 1em -2em rgba(61, 184, 143, 0.75), -1em 2em rgba(233, 169, 32, 0.75);
    }

    100% {
        box-shadow: 1em 2em rgba(61, 184, 143, 0.75), -1em -2em rgba(233, 169, 32, 0.75);
    }
}


/* position to center */

.loader {
    position: absolute;
    top: calc(50% - 2.5em);
    left: calc(50% - 2.5em);
}


/**
 * disable background
 */

.loader-mask {
    position: fixed;
    z-index: 9998;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .5);
    display: table;
    transition: opacity .3s ease;
}


.lds-spinner {
    color: official;
    display: inline-block;
    position: relative;
    width: 64px;
    height: 64px;
}

    .lds-spinner div {
        transform-origin: 32px 32px;
        animation: lds-spinner 1.2s linear infinite;
    }

        .lds-spinner div:after {
            content: " ";
            display: block;
            position: absolute;
            top: 3px;
            left: 29px;
            width: 5px;
            height: 14px;
            border-radius: 20%;
            background: rgb(80, 80, 80);
        }

        .lds-spinner div:nth-child(1) {
            transform: rotate(0deg);
            animation-delay: -1.1s;
        }

        .lds-spinner div:nth-child(2) {
            transform: rotate(30deg);
            animation-delay: -1s;
        }

        .lds-spinner div:nth-child(3) {
            transform: rotate(60deg);
            animation-delay: -0.9s;
        }

        .lds-spinner div:nth-child(4) {
            transform: rotate(90deg);
            animation-delay: -0.8s;
        }

        .lds-spinner div:nth-child(5) {
            transform: rotate(120deg);
            animation-delay: -0.7s;
        }

        .lds-spinner div:nth-child(6) {
            transform: rotate(150deg);
            animation-delay: -0.6s;
        }

        .lds-spinner div:nth-child(7) {
            transform: rotate(180deg);
            animation-delay: -0.5s;
        }

        .lds-spinner div:nth-child(8) {
            transform: rotate(210deg);
            animation-delay: -0.4s;
        }

        .lds-spinner div:nth-child(9) {
            transform: rotate(240deg);
            animation-delay: -0.3s;
        }

        .lds-spinner div:nth-child(10) {
            transform: rotate(270deg);
            animation-delay: -0.2s;
        }

        .lds-spinner div:nth-child(11) {
            transform: rotate(300deg);
            animation-delay: -0.1s;
        }

        .lds-spinner div:nth-child(12) {
            transform: rotate(330deg);
            animation-delay: 0s;
        }

@keyframes lds-spinner {
    0% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}