#loader .overlay {

        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(255, 255, 255, 0.6);
        z-index: 999;

}

#loader .spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 60px;
    height: 60px;
    margin: -30px 0 0 -30px;
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1000;
}