.loader {
    border: 26px solid #f3f3f3;
    border-top: 26px solid #DC3532;
    border-radius: 50%;
    width: 370px;
    height: 370px;
    animation: spin 2s linear infinite;
    position: fixed;
    top: 300px;
    z-index: 100;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#loading-container {
    visibility: hidden;
}