/* loader */
.loader-overlay {
    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=20)";
    background-color: rgba(0, 0, 0, 0.2);
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
}

.loader-bg {
    background-color: rgba(255, 255, 255, 0.0);
    width: 86px;
    height: 86px;
    border-radius: 10px;
    display: block;
    position: absolute;
    margin-left: -42px;
    margin-top: -42px;
    top: 50%;
    left: 50%;
    padding: 23px;
    box-sizing: border-box;
}

.sk-folding-cube {
    margin: auto auto;
    width: 40px;
    height: 40px;
    position: relative;
    -webkit-transform: rotateZ(45deg);
    transform: rotateZ(45deg);
}

.sk-folding-cube .sk-cube {
    float: left;
    width: 50%;
    height: 50%;
    position: relative;
    -webkit-transform: scale(1.1);
    -ms-transform: scale(1.1);
    transform: scale(1.1);
}

.sk-folding-cube .sk-cube:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #333;
    -webkit-animation: sk-foldCubeAngle 2.4s infinite linear both;
    animation: sk-foldCubeAngle 2.4s infinite linear both;
    -webkit-transform-origin: 100% 100%;
    -ms-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
}

.sk-folding-cube .sk-cube2 {
    -webkit-transform: scale(1.1) rotateZ(90deg);
    transform: scale(1.1) rotateZ(90deg);
}

.sk-folding-cube .sk-cube3 {
    -webkit-transform: scale(1.1) rotateZ(180deg);
    transform: scale(1.1) rotateZ(180deg);
}

.sk-folding-cube .sk-cube4 {
    -webkit-transform: scale(1.1) rotateZ(270deg);
    transform: scale(1.1) rotateZ(270deg);
}

.sk-folding-cube .sk-cube2:before {
    -webkit-animation-delay: 0.3s;
    animation-delay: 0.3s;
}

.sk-folding-cube .sk-cube3:before {
    -webkit-animation-delay: 0.6s;
    animation-delay: 0.6s;
}

.sk-folding-cube .sk-cube4:before {
    -webkit-animation-delay: 0.9s;
    animation-delay: 0.9s;
}

@-webkit-keyframes sk-foldCubeAngle {
    0%, 10% {
        -webkit-transform: perspective(140px) rotateX(-180deg);
        transform: perspective(140px) rotateX(-180deg);
        opacity: 0;
    }

    25%, 75% {
        -webkit-transform: perspective(140px) rotateX(0deg);
        transform: perspective(140px) rotateX(0deg);
        opacity: 1;
    }

    90%, 100% {
        -webkit-transform: perspective(140px) rotateY(180deg);
        transform: perspective(140px) rotateY(180deg);
        opacity: 0;
    }
}

@keyframes sk-foldCubeAngle {
    0%, 10% {
        -webkit-transform: perspective(140px) rotateX(-180deg);
        transform: perspective(140px) rotateX(-180deg);
        opacity: 0;
    }

    25%, 75% {
        -webkit-transform: perspective(140px) rotateX(0deg);
        transform: perspective(140px) rotateX(0deg);
        opacity: 1;
    }

    90%, 100% {
        -webkit-transform: perspective(140px) rotateY(180deg);
        transform: perspective(140px) rotateY(180deg);
        opacity: 0;
    }
}