/**
 * Fredrikov ERP - Enterprise Design System
 * Based on Fredrikov Enterprise Inventory System
 * 
 * @version 2.1.0
 * @package FredrikovERP
 */

/* ============================================================
   CSS VARIABLES - Fredrikov Enterprise Color Palette
   ============================================================ */
:root {
    /* Primary Colors - Deep Blue Corporate */
    --primary: #1e3a8a;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #155e75;
    --accent: #0c4a6e;
    
    /* Status Colors */
    --success: #047857;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #0ea5e9;
    
    /* Neutral Grays */
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --navbar-height: 70px;
    --container-max-width: 1920px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 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);
}

/* ============================================================
   BASE STYLES
   ============================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--gray-700);
    background-color: var(--gray-100);
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.wrapper {
    display: flex;
    min-height: 100vh;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-brand i {
    font-size: 1.75rem;
}

.sidebar-brand span {
    white-space: nowrap;
}

.sidebar.collapsed .sidebar-brand span {
    display: none;
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar.collapsed .sidebar-toggle {
    margin: 0 auto;
}

.sidebar-menu {
    padding: 1rem 0;
}

.sidebar-menu-item {
    margin: 0.25rem 0.5rem;
}

.sidebar-menu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    color: rgba(255, 255, 255, 0.85);
    border-radius: 8px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.sidebar-menu-link:hover,
.sidebar-menu-link.active {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.sidebar-menu-link i {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
}

.sidebar-menu-link span {
    flex: 1;
}

.sidebar-menu-link .badge {
    margin-left: auto;
}

.sidebar.collapsed .sidebar-menu-link span,
.sidebar.collapsed .sidebar-menu-link .badge {
    display: none;
}

.sidebar.collapsed .sidebar-menu-link {
    justify-content: center;
    padding: 0.875rem;
}

.sidebar-menu-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.5);
    padding: 1rem 1rem 0.5rem;
    font-weight: 600;
}

.sidebar.collapsed .sidebar-menu-title {
    display: none;
}

.sidebar-user {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.2);
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.sidebar-user-details {
    flex: 1;
    overflow: hidden;
}

.sidebar-user-name {
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar.collapsed .sidebar-user-details {
    display: none;
}

.sidebar.collapsed .sidebar-user {
    padding: 0.75rem;
}

.sidebar.collapsed .sidebar-user-avatar {
    width: 36px;
    height: 36px;
    margin: 0 auto;
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* ============================================================
   TOP NAVBAR
   ============================================================ */
.top-navbar {
    background: white;
    height: var(--navbar-height);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-600);
    cursor: pointer;
    display: none;
}

.navbar-brand-mobile {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    display: none;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    color: var(--gray-600);
    transition: all 0.2s ease;
    cursor: pointer;
}

.navbar-item:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.navbar-item i {
    font-size: 1.125rem;
}

.navbar-item .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 0.625rem;
    padding: 2px 5px;
}

.navbar-divider {
    width: 1px;
    height: 24px;
    background: var(--gray-200);
    margin: 0 0.5rem;
}

/* ============================================================
   PAGE CONTENT
   ============================================================ */
.page-content {
    flex: 1;
    padding: 2rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

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

.page-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--gray-50);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

/* Stat Cards */
.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-icon.primary { background: rgba(30, 58, 138, 0.1); color: var(--primary); }
.stat-icon.success { background: rgba(4, 120, 87, 0.1); color: var(--success); }
.stat-icon.warning { background: rgba(217, 119, 6, 0.1); color: var(--warning); }
.stat-icon.danger { background: rgba(220, 38, 38, 0.1); color: var(--danger); }
.stat-icon.info { background: rgba(14, 165, 233, 0.1); color: var(--info); }

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
}

.stat-change {
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.25rem;
}

.stat-change.positive { color: var(--success); }
.stat-change.negative { color: var(--danger); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    color: white;
}

.btn-secondary {
    background: var(--gray-600);
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-700);
    color: white;
}

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

.btn-success:hover:not(:disabled) {
    background: #059669;
    color: white;
}

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

.btn-warning:hover:not(:disabled) {
    background: #b45309;
    color: white;
}

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

.btn-danger:hover:not(:disabled) {
    background: #b91c1c;
    color: white;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover:not(:disabled) {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 6px;
}

.badge-success {
    background: rgba(4, 120, 87, 0.1);
    color: var(--success);
}

.badge-warning {
    background: rgba(217, 119, 6, 0.1);
    color: var(--warning);
}

.badge-danger {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger);
}

.badge-info {
    background: rgba(14, 165, 233, 0.1);
    color: var(--info);
}

.badge-secondary {
    background: rgba(100, 116, 139, 0.1);
    color: var(--gray-600);
}

.badge-primary {
    background: rgba(30, 58, 138, 0.1);
    color: var(--primary);
}

/* ============================================================
   TABLES
   ============================================================ */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead th {
    background: var(--gray-50);
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-200);
}

.table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

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

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

.table-actions {
    display: flex;
    gap: 0.5rem;
}

/* ============================================================
   FORMS
   ============================================================ */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-label.required::after {
    content: ' *';
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    transition: all 0.2s ease;
    background: white;
    color: var(--gray-700);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-control:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.invalid-feedback {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--danger);
}

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

/* ============================================================
   ALERTS
   ============================================================ */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: rgba(4, 120, 87, 0.1);
    border: 1px solid rgba(4, 120, 87, 0.2);
    color: var(--success);
}

.alert-danger {
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.2);
    color: var(--danger);
}

.alert-warning {
    background: rgba(217, 119, 6, 0.1);
    border: 1px solid rgba(217, 119, 6, 0.2);
    color: var(--warning);
}

.alert-info {
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.2);
    color: var(--info);
}

/* ============================================================
   MODALS
   ============================================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-dialog {
    background: white;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-lg {
    max-width: 800px;
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar.collapsed ~ .main-content {
        margin-left: 0;
    }
    
    .navbar-toggle {
        display: block;
    }
    
    .navbar-brand-mobile {
        display: block;
    }
    
    .page-content {
        padding: 1rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 767px) {
    .top-navbar {
        padding: 0 1rem;
    }
    
    .navbar-right .navbar-item span {
        display: none;
    }
    
    .page-actions {
        flex-wrap: wrap;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .table-responsive {
        border-radius: 8px;
    }
}

/* ============================================================
   UTILITIES
   ============================================================ */
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }
.text-muted { color: var(--gray-500); }

.bg-primary { background-color: var(--primary); }
.bg-success { background-color: var(--success); }
.bg-warning { background-color: var(--warning); }
.bg-danger { background-color: var(--danger); }
.bg-info { background-color: var(--info); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.flex-wrap { flex-wrap: wrap; }
.flex-shrink-0 { flex-shrink: 0; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }

.rounded { border-radius: 8px; }
.rounded-full { border-radius: 50%; }

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

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
    .sidebar,
    .top-navbar,
    .page-actions,
    .btn,
    .no-print {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* ============================================================
   SCROLLBAR STYLES
   ============================================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

.slide-in {
    animation: slideIn 0.3s ease;
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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