/* ==========================================================================
   B2B CRM - Professional Corporate Design System
   Beyaz tonları, kurumsal, modern UX
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Primary Palette - Corporate Blue */
    --color-primary: #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1e3a8a;
    --color-primary-subtle: #eff6ff;
    
    /* Accent Colors */
    --color-success: #059669;
    --color-success-light: #d1fae5;
    --color-warning: #d97706;
    --color-warning-light: #fef3c7;
    --color-danger: #dc2626;
    --color-danger-light: #fee2e2;
    --color-info: #0891b2;
    --color-info-light: #cffafe;
    
    /* Neutral Palette - White Tones */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Surface Colors */
    --surface-primary: #ffffff;
    --surface-secondary: #f9fafb;
    --surface-tertiary: #f3f4f6;
    --surface-elevated: #ffffff;
    
    /* Typography */
    --font-sans: 'DM Sans', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', monospace;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   Base & Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--surface-secondary);
    margin: 0;
    min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-gray-900);
    margin: 0;
}

h1 { font-size: 2rem; letter-spacing: -0.025em; }
h2 { font-size: 1.625rem; letter-spacing: -0.02em; }
h3 { font-size: 1.375rem; letter-spacing: -0.015em; }
h4 { font-size: 1.125rem; letter-spacing: -0.01em; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

.text-muted { color: var(--color-gray-500) !important; }
.text-primary { color: var(--color-primary) !important; }
.text-success { color: var(--color-success) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-danger { color: var(--color-danger) !important; }

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

/* --------------------------------------------------------------------------
   Layout Components
   -------------------------------------------------------------------------- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: 260px;
    background: var(--surface-primary);
    border-right: 1px solid var(--color-gray-200);
    padding: var(--space-6) 0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.app-main {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

.app-content {
    padding: var(--space-8);
    max-width: 1400px;
}

/* --------------------------------------------------------------------------
   Navbar - Top Navigation
   -------------------------------------------------------------------------- */
.navbar {
    background: var(--surface-primary) !important;
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-3) var(--space-6);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-gray-900) !important;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    letter-spacing: -0.02em;
}

.logo-mark {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.25);
}

.navbar .nav-link {
    color: var(--color-gray-600);
    font-weight: 500;
    font-size: 0.875rem;
    padding: var(--space-2) var(--space-4) !important;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    position: relative;
}

.navbar .nav-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-subtle);
}

.navbar .nav-link.active {
    color: var(--color-primary);
    background: var(--color-primary-subtle);
    font-weight: 600;
}

.navbar .nav-link i {
    margin-right: var(--space-2);
    font-size: 1rem;
}

.navbar-nav {
    gap: var(--space-1);
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.user-avatar {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
}

.user-info {
    line-height: 1.3;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-900);
}

.user-role {
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

/* --------------------------------------------------------------------------
   Cards - Primary UI Component
   -------------------------------------------------------------------------- */
.card {
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.card:hover {
    border-color: var(--color-gray-300);
}

.card-elevated {
    border: none;
    box-shadow: var(--shadow-md);
}

.card-elevated:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--color-gray-100);
    padding: var(--space-4) var(--space-5);
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--color-gray-900);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body {
    padding: var(--space-5);
}

.card-footer {
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-100);
    padding: var(--space-4) var(--space-5);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* --------------------------------------------------------------------------
   Stat Cards - Dashboard KPIs
   -------------------------------------------------------------------------- */
.stat-card {
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md), 0 0 0 1px var(--color-primary-light);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    opacity: 0;
    transition: var(--transition-base);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: var(--space-4);
}

.stat-icon.primary {
    background: var(--color-primary-subtle);
    color: var(--color-primary);
}

.stat-icon.success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.stat-icon.warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.stat-icon.info {
    background: var(--color-info-light);
    color: var(--color-info);
}

.stat-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-1);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.8125rem;
    font-weight: 500;
    margin-top: var(--space-2);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
}

.stat-change.positive {
    background: var(--color-success-light);
    color: var(--color-success);
}

.stat-change.negative {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.875rem;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    border: none;
    cursor: pointer;
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
    box-shadow: 0 4px 14px rgba(30, 64, 175, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: white;
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.btn-secondary:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-900);
}

.btn-success {
    background: linear-gradient(135deg, var(--color-success), #10b981);
    color: white;
    box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
}

.btn-success:hover {
    box-shadow: 0 6px 20px rgba(5, 150, 105, 0.4);
    transform: translateY(-1px);
    color: white;
}

.btn-outline-primary {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

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

.btn-outline-secondary {
    background: transparent;
    color: var(--color-gray-600);
    border: 1.5px solid var(--color-gray-300);
}

.btn-outline-secondary:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
    border-color: var(--color-gray-400);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-600);
}

.btn-ghost:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
    display: block;
}

.form-control,
.form-select {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    padding: var(--space-3) var(--space-4);
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: var(--surface-primary);
    color: var(--color-gray-900);
    transition: var(--transition-fast);
    width: 100%;
}

.form-control:hover,
.form-select:hover {
    border-color: var(--color-gray-300);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-glow);
    outline: none;
}

.form-control::placeholder {
    color: var(--color-gray-400);
}

.form-control-lg {
    padding: var(--space-4) var(--space-5);
    font-size: 1rem;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.form-text {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

.form-group {
    margin-bottom: var(--space-5);
}

/* Input Groups */
.input-group {
    display: flex;
}

.input-group .form-control {
    border-radius: 0;
}

.input-group .form-control:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group .form-control:last-child,
.input-group .btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group-text {
    background: var(--color-gray-100);
    border: 1.5px solid var(--color-gray-200);
    padding: var(--space-3) var(--space-4);
    color: var(--color-gray-600);
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.table-container {
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table {
    margin: 0;
    font-size: 0.875rem;
}

.table thead th {
    background: var(--color-gray-50);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-600);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-gray-200);
    white-space: nowrap;
}

.table tbody td {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
    vertical-align: middle;
    color: var(--color-gray-700);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table tbody tr {
    transition: var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--color-gray-50);
}

.table-clickable tbody tr {
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */
.badge {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

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

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

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

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

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

.badge-neutral {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}
.badge-secondary {
    background: #e0e7ff; /* soft indigo */
    color: #1e3a8a;
}

/* Status Badges */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    display: inline-block;
    margin-right: var(--space-2);
}

.status-dot.active { background: var(--color-success); }
.status-dot.pending { background: var(--color-warning); }
.status-dot.inactive { background: var(--color-gray-400); }

/* --------------------------------------------------------------------------
   Pipeline / Kanban Board
   -------------------------------------------------------------------------- */
.kanban-board {
    display: flex;
    gap: var(--space-5);
    overflow-x: auto;
    padding-bottom: var(--space-4);
}

.kanban-column {
    flex: 0 0 300px;
    min-width: 300px;
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
}

.kanban-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid transparent;
}

.kanban-header.potansiyel { border-color: var(--color-info); }
.kanban-header.takipte { border-color: var(--color-warning); }
.kanban-header.teklif { border-color: var(--color-primary); }
.kanban-header.kazanildi { border-color: var(--color-success); }
.kanban-header.kaybedildi { border-color: var(--color-danger); }

.kanban-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-900);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.kanban-count {
    background: var(--color-gray-200);
    color: var(--color-gray-600);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.kanban-cards {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    min-height: 200px;
}

.kanban-card {
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    cursor: pointer;
    transition: var(--transition-base);
}

.kanban-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.kanban-cards.drag-over {
    border: 2px dashed var(--color-primary);
    border-radius: var(--radius-md);
    background: var(--color-primary-subtle);
}

.kanban-card.dragging {
    opacity: 0.7;
    box-shadow: var(--shadow-lg);
}

.kanban-card-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
}

.kanban-card-meta {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.kanban-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-gray-100);
}

.kanban-empty {
    text-align: center;
    padding: var(--space-8);
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Timeline
   -------------------------------------------------------------------------- */
.timeline {
    position: relative;
    padding-left: var(--space-8);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-gray-200);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-6);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -28px;
    width: 24px;
    height: 24px;
    background: var(--surface-primary);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

.timeline-marker.success {
    border-color: var(--color-success);
    color: var(--color-success);
}

.timeline-marker.warning {
    border-color: var(--color-warning);
    color: var(--color-warning);
}

.timeline-marker.primary {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.timeline-content {
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-4);
}

.timeline-date {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.timeline-title {
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.timeline-text {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* --------------------------------------------------------------------------
   Lists
   -------------------------------------------------------------------------- */
.list-group {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.list-group-item {
    border: none;
    border-bottom: 1px solid var(--color-gray-100);
    padding: var(--space-4) var(--space-5);
    background: transparent;
    transition: var(--transition-fast);
}

.list-group-item:last-child {
    border-bottom: none;
}

.list-group-item:hover {
    background: var(--color-gray-50);
}

.list-group-item-action {
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Alerts & Toasts
   -------------------------------------------------------------------------- */
.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.alert-success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.alert-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.alert-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.alert-info {
    background: var(--color-info-light);
    color: var(--color-info);
}

/* Toast */
.toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
}

.toast {
    background: var(--surface-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* --------------------------------------------------------------------------
   Login Page
   -------------------------------------------------------------------------- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-gray-50) 0%, #eef2ff 50%, var(--color-gray-100) 100%);
    padding: var(--space-6);
}

.login-card {
    background: var(--surface-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-10);
    width: 100%;
    max-width: 440px;
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
}

.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.login-logo-mark {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: 0 8px 24px rgba(30, 64, 175, 0.3);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.02em;
}

.login-subtitle {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
    text-align: center;
    margin-bottom: var(--space-8);
}

.login-form .form-control {
    height: 52px;
    font-size: 1rem;
}

.login-form .btn {
    height: 52px;
    font-size: 1rem;
    font-weight: 600;
}

/* --------------------------------------------------------------------------
   Page Header
   -------------------------------------------------------------------------- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

.page-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Breadcrumb */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: var(--space-2);
    font-size: 0.8125rem;
}

.breadcrumb-item {
    color: var(--color-gray-500);
}

.breadcrumb-item a {
    color: var(--color-primary);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: var(--color-gray-700);
}

/* --------------------------------------------------------------------------
   Quick Actions
   -------------------------------------------------------------------------- */
.quick-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--color-gray-700);
    font-size: 0.8125rem;
    font-weight: 500;
    min-width: 100px;
    transition: var(--transition-base);
}

.quick-action-btn:hover {
    border-color: var(--color-primary-light);
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.quick-action-btn i {
    font-size: 1.25rem;
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Empty States
   -------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-6);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    font-size: 2rem;
    color: var(--color-gray-400);
}

.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
}

.empty-state-text {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-5);
}

/* --------------------------------------------------------------------------
   Charts
   -------------------------------------------------------------------------- */
.chart-container {
    position: relative;
    height: 300px;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
    margin-top: var(--space-4);
}

.chart-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

.chart-legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

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

.modal-header {
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-5) var(--space-6);
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    border-top: 1px solid var(--color-gray-200);
    padding: var(--space-4) var(--space-6);
    background: var(--color-gray-50);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* --------------------------------------------------------------------------
   Tabs
   -------------------------------------------------------------------------- */
.nav-tabs {
    border-bottom: 1px solid var(--color-gray-200);
    gap: var(--space-1);
}

.nav-tabs .nav-link {
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    color: var(--color-gray-500);
    font-weight: 500;
    padding: var(--space-3) var(--space-4);
    transition: var(--transition-fast);
}

.nav-tabs .nav-link:hover {
    border-color: var(--color-gray-300);
    color: var(--color-gray-700);
}

.nav-tabs .nav-link.active {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: transparent;
}

/* --------------------------------------------------------------------------
   Reports
   -------------------------------------------------------------------------- */
.report-filter-bar {
    background: var(--surface-primary);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.report-filter-bar label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-600);
    margin-bottom: 0;
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

/* --------------------------------------------------------------------------
   Audit Log
   -------------------------------------------------------------------------- */
.audit-log-scroll {
    max-height: 340px;
    overflow-y: auto;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 991px) {
    .app-sidebar {
        transform: translateX(-100%);
        transition: var(--transition-base);
    }
    
    .app-sidebar.show {
        transform: translateX(0);
    }
    
    .app-main {
        margin-left: 0;
    }
    
    .kanban-board {
        flex-direction: column;
    }
    
    .kanban-column {
        flex: none;
        min-width: auto;
    }
}

@media (max-width: 767px) {
    .app-content {
        padding: var(--space-4);
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .stat-card {
        padding: var(--space-4);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .navbar-nav {
        margin-top: var(--space-4);
    }
    
    .navbar .nav-link {
        padding: var(--space-3) !important;
    }
    
    .table-container {
        border-radius: var(--radius-md);
    }
    
    .login-card {
        padding: var(--space-6);
    }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }

.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.border-0 { border: none !important; }
.border-top { border-top: 1px solid var(--color-gray-200) !important; }
.border-bottom { border-bottom: 1px solid var(--color-gray-200) !important; }

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

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

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

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* Selection */
::selection {
    background: var(--color-primary-subtle);
    color: var(--color-primary);
}