/* Modern CSS Reset and Base Styles */
* {
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    margin-bottom: 60px;
}

/* Focus States */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #0d6efd;
}

/* Layout */
html {
    position: relative;
    min-height: 100%;
}

.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    white-space: nowrap;
    line-height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

/* Navigation Enhancements */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    text-decoration: none;
}

.navbar-brand:hover {
    color: #f8f9fa !important;
    transform: translateY(-1px);
    transition: all 0.3s ease;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    color: white !important;
}

/* Card Enhancements */
.card {
    border: none;
    border-radius: 1rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background: white;
}

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

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom: none;
    border-radius: 1rem 1rem 0 0 !important;
    padding: 1.25rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.card-body {
    padding: 1.5rem;
}

/* Table Enhancements */
.table {
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.05);
    background: white;
}

.table th {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-top: none;
    font-weight: 600;
    color: #495057;
    padding: 1rem;
    border-bottom: 2px solid #dee2e6;
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid #f1f3f4;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

.table tbody tr:hover {
    background-color: rgba(102, 126, 234, 0.05);
    transition: background-color 0.3s ease;
}

/* Button Enhancements */
.btn {
    border-radius: 0.5rem;
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 0.25rem 0.5rem rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    transform: translateY(-1px);
    box-shadow: 0 0.5rem 1rem rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 0.25rem 0.5rem rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-1px);
    box-shadow: 0 0.5rem 1rem rgba(16, 185, 129, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    box-shadow: 0 0.25rem 0.5rem rgba(245, 158, 11, 0.3);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    transform: translateY(-1px);
    box-shadow: 0 0.5rem 1rem rgba(245, 158, 11, 0.4);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 0.25rem 0.5rem rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    transform: translateY(-1px);
    box-shadow: 0 0.5rem 1rem rgba(239, 68, 68, 0.4);
}

.btn-outline-primary {
    border: 2px solid #667eea;
    color: #667eea;
    background: transparent;
}

.btn-outline-primary:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: white;
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

.btn-group .btn {
    margin-right: 0;
}

/* Form Enhancements */
.form-control {
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background-color: #fafafa;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background-color: white;
}

.form-select {
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: #fafafa;
    transition: all 0.3s ease;
}

.form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background-color: white;
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #374151;
    font-size: 0.95rem;
}

.form-text {
    color: #6b7280;
    font-size: 0.875rem;
}

/* Alert Enhancements */
.alert {
    border: none;
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    font-weight: 500;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    border-left: 4px solid #10b981;
}

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border-left: 4px solid #f59e0b;
}

.alert-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
    border-left: 4px solid #3b82f6;
}

/* Badge Enhancements */
.badge {
    font-size: 0.75em;
    padding: 0.5em 0.75em;
    border-radius: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.invoice-item {
  border-bottom: 1px solid #dee2e6;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

.invoice-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

/* Dashboard Enhancements */
.dashboard-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: none;
    position: relative;
    overflow: hidden;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.15);
}

.dashboard-card .card-title {
    color: #374151;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.dashboard-card .display-4 {
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dashboard-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1rem;
}

.dashboard-icon.customers {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.dashboard-icon.products {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.dashboard-icon.invoices {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.dashboard-icon.payments {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* Fade In Animation */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

/* Search Box Enhancement */
.search-box {
    position: relative;
    max-width: 400px;
}

.search-box .form-control {
    padding-left: 3rem;
    background-color: white;
    border: 2px solid #e5e7eb;
}

.search-box .search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6b7280;
    z-index: 10;
}

/* Action Buttons Container */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.action-buttons .btn {
    min-width: auto;
    padding: 0.375rem 0.75rem;
}

/* Page Header */
.page-header {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.05);
    border-left: 4px solid #667eea;
}

.page-header h1 {
    color: #374151;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-header .breadcrumb {
    background: none;
    padding: 0;
    margin: 0;
}

.page-header .breadcrumb-item {
    color: #6b7280;
}

.page-header .breadcrumb-item.active {
    color: #667eea;
    font-weight: 600;
}

/* Status badges */
.badge.bg-success {
  background-color: #198754 !important;
}

.badge.bg-warning {
  background-color: #ffc107 !important;
  color: #000 !important;
}

.badge.bg-danger {
  background-color: #dc3545 !important;
}

.badge.bg-secondary {
  background-color: #6c757d !important;
}

/* Responsive table improvements */
@media (max-width: 768px) {
  .table-responsive {
    font-size: 0.875rem;
  }
  
  .btn-group .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
  }
}

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

/* Form improvements */
.form-control:focus {
  border-color: #86b7fe;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-select:focus {
  border-color: #86b7fe;
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* Button improvements */
.btn {
  border-radius: 0.375rem;
  font-weight: 500;
}

.btn-outline-primary:hover {
  background-color: #0d6efd;
  border-color: #0d6efd;
}

/* Navigation improvements */
.navbar-nav .nav-link {
  font-weight: 500;
  padding: 0.5rem 1rem;
}

.navbar-nav .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 0.375rem;
}

/* Card improvements */
.card-body {
  padding: 1.5rem;
}

.card-title {
  margin-bottom: 1rem;
  font-weight: 600;
}

/* Table improvements */
.table-hover tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.025);
}

.table-dark th {
  background-color: #495057;
  border-color: #495057;
}

/* Responsive Design Enhancements */
@media (max-width: 768px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .dashboard-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .page-header {
        padding: 1.5rem;
    }
    
    .table-responsive {
        border-radius: 0.5rem;
        box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.05);
    }
    
    .action-buttons {
        justify-content: center;
    }
    
    .action-buttons .btn {
        flex: 1;
        min-width: 120px;
    }
    
    .search-box {
        max-width: 100%;
        margin-bottom: 1rem;
    }
    
    .navbar-nav {
        text-align: center;
    }
    
    .nav-link {
        padding: 0.75rem 1rem !important;
    }
}

@media (max-width: 576px) {
    .dashboard-card .display-4 {
        font-size: 2rem;
    }
    
    .page-header h1 {
        font-size: 1.75rem;
    }
    
    .btn {
        font-size: 0.8rem;
        padding: 0.5rem 1rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
        font-size: 0.875rem;
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.bg-gradient-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.bg-gradient-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.bg-gradient-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.shadow-soft {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.shadow-hover {
    transition: box-shadow 0.3s ease;
}

.shadow-hover:hover {
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.15);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, #667eea 0%, #764ba2 100%) border-box;
}

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

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #000 !important;
    }
    
    .navbar,
    .footer {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .page-header {
        border: none !important;
        box-shadow: none !important;
    }
}