body {
    font-family: 'Tahoma', 'Segoe UI', sans-serif;
    background-color: #f8f9fa;
}

.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar .nav-link {
    font-weight: 500;
    color: #adb5bd;
    padding: 0.75rem 1rem;
    border-radius: 0.25rem;
    margin: 0.25rem 0;
}

.sidebar .nav-link:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar .nav-link.active {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.2);
}

.sidebar .nav-link i {
    margin-left: 4px;
}

main {
    padding-top: 1rem;
}

/* Responsive adjustments */
@media (max-width: 767.98px) {
    .sidebar {
        position: static;
        height: auto;
        padding-top: 0;
    }
    
    main {
        padding-top: 0;
    }
}

/* Persian font numbers */
.persian-numbers {
    font-family: 'Tahoma', 'Segoe UI', sans-serif;
    direction: ltr;
    display: inline-block;
}

/* Table styling */
.table-responsive {
    overflow-x: auto;
}

.table th {
    white-space: nowrap;
    background-color: #f8f9fa;
}

/* Form styling */
.form-control, .form-select {
    padding: 0.375rem 0.75rem;
}

/* Custom card styling */
.card {
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    font-weight: 600;
}

/* Custom button styling */
.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-outline-secondary {
    color: #6c757d;
    border-color: #6c757d;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #212529;
        color: #f8f9fa;
    }
    
    .sidebar {
        background-color: #343a40 !important;
    }
    
    .card {
        background-color: #2c3034;
        border-color: #495057;
    }
    
    .card-header {
        background-color: #343a40;
        border-bottom-color: #495057;
    }
    
    .table {
        color: #f8f9fa;
    }
    
    .table th {
        background-color: #343a40;
    }
    
    .table-striped tbody tr:nth-of-type(odd) {
        background-color: rgba(255, 255, 255, 0.05);
    }
}