/* Global Styles */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --transition: all 0.15s ease-in-out;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

/* RTL Support for Arabic */
[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .navbar-nav {
    padding-right: 0;
}

[dir="rtl"] .me-1 {
    margin-right: 0 !important;
    margin-left: 0.25rem !important;
}

[dir="rtl"] .me-2 {
    margin-right: 0 !important;
    margin-left: 0.5rem !important;
}

[dir="rtl"] .ms-auto {
    margin-left: 0 !important;
    margin-right: auto !important;
}

[dir="rtl"] .text-end {
    text-align: left !important;
}

[dir="rtl"] .input-group .form-control {
    border-left: none;
    border-right: 1px solid #ced4da;
}

[dir="rtl"] .input-group .btn {
    border-right: none;
    border-left: 1px solid #ced4da;
}

[dir="rtl"] .table th,
[dir="rtl"] .table td {
    text-align: right;
}

[dir="rtl"] .modal-header .btn-close {
    margin: 0;
    padding: 0;
}

[dir="rtl"] .dropdown-menu {
    text-align: right;
}

/* Navigation */
.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

.nav-link.active {
    color: #fff !important;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
}

/* Content Sections */
.content-section {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid #e9ecef;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Statistics Cards */
.card.bg-primary,
.card.bg-success,
.card.bg-warning,
.card.bg-info {
    border: none;
}

.card.bg-primary .card-title,
.card.bg-success .card-title,
.card.bg-warning .card-title,
.card.bg-info .card-title {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.card.bg-primary h2,
.card.bg-success h2,
.card.bg-warning h2,
.card.bg-info h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0;
}

.opacity-75 {
    opacity: 0.75;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table th {
    border-top: none;
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    color: #495057;
    background-color: #f8f9fa;
}

.table td {
    vertical-align: middle;
    border-top: 1px solid #dee2e6;
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 123, 255, 0.05);
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0b5ed7;
}

.btn-outline-secondary {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.btn-outline-secondary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Form Controls */
.form-control,
.form-select {
    border-radius: var(--border-radius);
    border: 1px solid #ced4da;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* Search and Filters */
.input-group {
    box-shadow: var(--box-shadow);
}

.input-group .form-control {
    border-right: none;
}

.input-group .btn {
    border-left: none;
    background-color: #fff;
}

/* Pagination */
.pagination {
    margin-bottom: 0;
}

.page-link {
    color: var(--primary-color);
    border: 1px solid #dee2e6;
    transition: var(--transition);
}

.page-link:hover {
    color: #0a58ca;
    background-color: #e9ecef;
    border-color: #dee2e6;
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Modals */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    background-color: #f8f9fa;
}

.modal-title {
    font-weight: 600;
    color: #495057;
}

.modal-footer {
    border-top: 1px solid #e9ecef;
    background-color: #f8f9fa;
}

/* Status Badges */
.badge {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    border-radius: 50rem;
}

.badge.bg-success {
    background-color: var(--success-color) !important;
}

.badge.bg-warning {
    background-color: var(--warning-color) !important;
    color: #000 !important;
}

.badge.bg-danger {
    background-color: var(--danger-color) !important;
}

.badge.bg-info {
    background-color: var(--info-color) !important;
    color: #000 !important;
}

.badge.bg-secondary {
    background-color: var(--secondary-color) !important;
}

/* Action Buttons */
.btn-action {
    padding: 0.25rem 0.5rem;
    margin: 0 0.125rem;
    font-size: 0.875rem;
}

.btn-edit {
    background-color: var(--warning-color);
    color: #000;
}

.btn-edit:hover {
    background-color: #e0a800;
    color: #000;
}

.btn-delete {
    background-color: var(--danger-color);
}

.btn-delete:hover {
    background-color: #bb2d3b;
}

.btn-view {
    background-color: var(--info-color);
    color: #000;
}

.btn-view:hover {
    background-color: #0dcaf0;
    color: #000;
}

/* Invoice Items */
.invoice-item {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid #e9ecef;
}

.invoice-item .form-control {
    background-color: #fff;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
    }
    
    .modal-dialog {
        margin: 1rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1rem;
    }
    
    .card.bg-primary h2,
    .card.bg-success h2,
    .card.bg-warning h2,
    .card.bg-info h2 {
        font-size: 1.5rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem 0.25rem;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .modal,
    .pagination {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
    
    .table th,
    .table td {
        border: 1px solid #000 !important;
    }
}

/* Utility Classes */
.text-muted {
    color: #6c757d !important;
}

.opacity-75 {
    opacity: 0.75;
}

.shadow-sm {
    box-shadow: var(--box-shadow) !important;
}

.shadow {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

.rounded {
    border-radius: var(--border-radius) !important;
}

.transition {
    transition: var(--transition);
}

/* Hover Effects */
.hover-shadow:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

.hover-lift:hover {
    transform: translateY(-2px);
}

/* Focus States */
.focus-ring:focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

.slide-up {
    animation: slideUp 0.3s ease-in-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Custom Checkbox and Radio */
.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Alert Styles */
.alert {
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.alert-success {
    background-color: #d1e7dd;
    color: #0f5132;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
}