body { 
    background-color: #f8f9fa; 
}

.container-fluid, .container { 
    margin-top: 30px; 
    margin-bottom: 30px; 
}

.card { 
    margin-bottom: 20px; 
}

.table-responsive { 
    max-height: 450px; 
}

.accordion-button:not(.collapsed) { 
    background-color: #e7f1ff; 
    color: #0c63e4; 
}

#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8); 
    z-index: 9999; 
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    backdrop-filter: blur(5px); 
    display: none; 
}

#loading-overlay .spinner-border {
    width: 4rem;
    height: 4rem;
}

#loading-overlay h4 {
    margin-top: 20px;
    color: #333;
}