.loading-mask {
    position: fixed;
    z-index: 99999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.7);
    display: none;
}

.loading-box {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #ddd;
    border-top: 5px solid #2196F3;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: auto;
}

.loading-text {
    margin-top: 10px;
    font-size: 14px;
    color: #333;
}

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