/* ============================================
   RT-Consulting Modern Design System
   ============================================ */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #0ea5e9;
    
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-light: #f3f4f6;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.4;
    padding-top: 56px;
    font-size: 0.9375rem;
}

/* ============================================
   Navigation Bar
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1030;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--accent-color);
    border-radius: 50%;
    display: inline-block;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    color: white !important;
}

.nav-link.active {
    color: white !important;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

/* ============================================
   Containers & Layout
   ============================================ */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 2px solid var(--border-light);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    font-weight: 600;
    border-radius: var(--radius-md);
    padding: 0.375rem 0.875rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    font-size: 0.8125rem;
    text-transform: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
    border: none;
}

.btn-success:hover {
    background-color: #059669;
    color: white;
}

.btn-secondary {
    background-color: var(--text-secondary);
    color: white;
    border: none;
}

.btn-secondary:hover {
    background-color: #4b5563;
    color: white;
}

.btn-info {
    background-color: var(--info-color);
    color: white;
    border: none;
}

.btn-info:hover {
    background-color: #0284c7;
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: none;
}

.btn-danger:hover {
    background-color: #dc2626;
    color: white;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* ============================================
   Forms
   ============================================ */

.form-group {
    margin-bottom: 0.625rem;
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control,
.form-select {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.375rem 0.625rem;
    font-size: 0.8125rem;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
    background-color: var(--bg-primary);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.form-select {
    cursor: pointer;
}

.form-check-input {
    cursor: pointer;
    border-color: var(--border-color);
    width: 1.25rem;
    height: 1.25rem;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ============================================
   Cards & Panels
   ============================================ */

.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: white;
    padding: 1.5rem;
    font-weight: 700;
    font-size: 1.125rem;
}

.card-body {
    padding: 0.75rem;
}

.card-footer {
    background-color: var(--bg-secondary);
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.panel {
    background-color: var(--bg-primary);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.panel.panel-info {
    border-left-color: var(--info-color);
}

.panel.panel-success {
    border-left-color: var(--success-color);
}

.panel.panel-warning {
    border-left-color: var(--warning-color);
}

.panel.panel-danger {
    border-left-color: var(--danger-color);
}

/* ============================================
   Tables
   ============================================ */

.table {
    background-color: var(--bg-primary);
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.table thead {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: white;
}

.table thead th {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    padding: 0.4rem 0.5rem;
    text-align: left;
    border: none;
}

.table tbody td {
    padding: 0.35rem 0.5rem;
    border-bottom: 1px solid var(--border-light);
    vertical-align: middle;
    color: var(--text-primary);
    font-size: 0.8125rem;
}

.table tbody tr {
    transition: background-color 0.2s ease;
}

.table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.table-sm thead th {
    padding: 0.75rem;
}

.table-sm tbody td {
    padding: 0.625rem;
}

.table-bordered {
    border: 1px solid var(--border-color);
}

.table-bordered tbody td {
    border: 1px solid var(--border-light);
}

/* ============================================
   Badges & Pills
   ============================================ */

.badge {
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background-color: var(--primary-light);
    color: white;
}

.badge-success {
    background-color: var(--success-color);
    color: white;
}

.badge-warning {
    background-color: var(--warning-color);
    color: white;
}

.badge-danger {
    background-color: var(--danger-color);
    color: white;
}

.badge-info {
    background-color: var(--info-color);
    color: white;
}

/* ============================================
   Alerts & Toasts
   ============================================ */

.alert {
    border-radius: var(--radius-lg);
    border: none;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.alert-primary {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-dark);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #065f46;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: #92400e;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #7f1d1d;
}

.toast {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.toast-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    font-weight: 600;
    color: var(--text-primary);
}

.toast-body {
    color: var(--text-secondary);
}

/* ============================================
   Modals
   ============================================ */

.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-title {
    font-weight: 700;
    font-size: 1.25rem;
}

.modal-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
}

/* ============================================
   Action Buttons Container
   ============================================ */

.action-buttons {
    display5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
    padding: 0.5tom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.action-buttons .btn {
    flex: 0 1 auto;
}

/* ============================================
   Filters Section
   ============================================ */

.filters-section {
    background-color: var(--bg-primary);
    border-ra0.75rem;
    margin-bottom: 0.75
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.filters-header {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.5rem;
}

.sticky-filters {
    position: sticky;
    top: 56px;
    z-index: 1020;
    background-color: var(--bg-primary);
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

/* ============================================
   Content Sections
   ============================================ */

.section {
    background-color: var(--bg-primary);
    border-ra0.75rem;
    margin-bottom: 0.75
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.section-title {125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    padding-bottom: 0.55rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-light);
}

.section-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

/* ============================================
   Empty States
   ============================================ */

.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* ============================================
   Utilities
   ============================================ */

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.25rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-column { flex-direction: column; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }

.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }

.fw-bold { font-weight: 700; }
.fw-600 { font-weight: 600; }
.fw-500 { font-weight: 500; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .filter-group {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 0.8125rem;
    }
    
    .table thead th,
    .table tbody td {
        padding: 0.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 1rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .section {
        padding: 1rem;
    }
}

/* ============================================
   Loading & Spinner
   ============================================ */

.spinner-border {
    border-color: var(--primary-light);
    border-right-color: transparent;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.2em;
}

/* ============================================
   Transitions & Animations
   ============================================ */

.transition-all {
    transition: all 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   Contenteditable Styling
   ============================================ */

[contenteditable="true"] {
    background-color: #fff9e6;
    border-radius: 0.25rem;
    padding: 0.25rem;
    cursor: text;
    transition: background-color 0.2s ease;
}

[contenteditable="true"]:focus {
    outline: 2px solid var(--primary-color);
    background-color: #fffaed;
}

[contenteditable="false"] {
    cursor: default;
}