.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loader_box {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;

    font-size: 18px;
    font-weight: bold;
    z-index: 1000;
}

.mini-loader {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid #ccc;
    border-top: 2px solid #2196f3;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    vertical-align: middle;
}