.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    color: #fff;
    margin-top: 20px;
    font-size: 18px;
    text-align: center;
}

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

/* تنسيقات خاصة بلوحة التحكم */
.admin-container .loading-overlay {
    background: rgba(0, 0, 0, 0.9);
}

.admin-container .loading-spinner {
    border-color: #2c3e50;
    border-top-color: #3498db;
}

.admin-container .loading-text {
    color: #ecf0f1;
    font-family: 'Cairo', sans-serif;
}

/* تنسيقات خاصة بالوضع الداكن */
body.dark-mode .loading-overlay {
    background: rgba(0, 0, 0, 0.95);
}

body.dark-mode .loading-spinner {
    border-color: #34495e;
    border-top-color: #3498db;
}

body.dark-mode .loading-text {
    color: #bdc3c7;
}