/* ==========================================================================
   CSS DESIGN SYSTEM - STOCKFLOW
   ========================================================================== */

/* Design Tokens & Theme Variables */
:root {
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Dark Theme (Default) */
    --bg-app: #090a0f;
    --bg-sidebar: #11131c;
    --bg-card: #151824;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.15);
    
    --success-color: #10b981;
    --success-hover: #059669;
    --success-glow: rgba(16, 185, 129, 0.15);
    
    --danger-color: #f43f5e;
    --danger-hover: #e11d48;
    --danger-glow: rgba(244, 63, 94, 0.15);
    
    --warning-color: #f59e0b;
    --warning-hover: #d97706;
    --warning-glow: rgba(245, 158, 11, 0.15);
    
    --info-color: #06b6d4;
    --info-hover: #0891b2;
    --info-glow: rgba(6, 182, 212, 0.15);
    
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 1px 1px rgba(255, 255, 255, 0.05);
    --modal-shadow: 0 20px 50px -12px rgba(0, 0, 0, 0.7);
    --glass-bg: rgba(21, 24, 36, 0.75);
    --glass-blur: blur(16px);
}

.light-theme {
    /* Light Theme Settings */
    --bg-app: #f4f6f9;
    --bg-sidebar: #ffffff;
    --bg-card: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-glow: rgba(79, 70, 229, 0.1);
    
    --success-color: #10b981;
    --success-hover: #059669;
    --success-glow: rgba(16, 185, 129, 0.1);
    
    --danger-color: #e11d48;
    --danger-hover: #be123c;
    --danger-glow: rgba(225, 29, 72, 0.1);
    
    --warning-color: #d97706;
    --warning-hover: #b45309;
    --warning-glow: rgba(217, 119, 6, 0.1);
    
    --info-color: #0891b2;
    --info-hover: #0369a1;
    --info-glow: rgba(8, 145, 178, 0.1);
    
    --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.02);
    --modal-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-blur: blur(12px);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Utility Styles */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-primary { color: var(--primary-color) !important; }
.text-sm { font-size: 0.85rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.py-3 { padding-top: 1rem; padding-bottom: 1rem; }
.text-center { text-align: center; }
.text-end { text-align: right; }
.text-center { text-align: center; }
.required { color: var(--danger-color); }
.justify-center { justify-content: center; }

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

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

/* Sidebar Layout */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
    transition: background-color 0.3s ease, border-color 0.3s ease, width 0.3s ease;
}

.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

.logo-text h2 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.sidebar-menu {
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-grow: 1;
}

.nav-item {
    background: none;
    border: none;
    outline: none;
    padding: 12px 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
}

.nav-item i {
    width: 20px;
    height: 20px;
    transition: transform 0.2s ease;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: var(--border-color);
}

.nav-item:hover i {
    transform: translateX(2px);
}

.nav-item.active {
    color: white;
    background: linear-gradient(90deg, var(--primary-color), rgba(99, 102, 241, 0.8));
    box-shadow: 0 4px 12px var(--primary-glow);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.theme-btn {
    width: 100%;
    background: var(--border-color);
    border: 1px solid transparent;
    padding: 10px 16px;
    border-radius: 8px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.theme-btn:hover {
    background: var(--border-hover);
    color: var(--text-primary);
}

/* Theme Icons Toggle */
.sun-icon { display: none; }
.moon-icon { display: block; }
.light-theme .sun-icon { display: block; }
.light-theme .moon-icon { display: none; }

/* Main Content Area */
.main-content {
    margin-left: 260px;
    flex-grow: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 30px;
}

/* Top Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.header-title h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-title p {
    font-size: 0.9rem;
    margin-top: 4px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.quick-stats-mini .stat-mini {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--card-shadow);
}

.quick-stats-mini .stat-mini .label {
    color: var(--text-muted);
}

.quick-stats-mini .stat-mini .val.positive {
    color: var(--success-color);
}
.quick-stats-mini .stat-mini .val.negative {
    color: var(--danger-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-profile .avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ec4899, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 4px 8px rgba(139, 92, 246, 0.2);
}

.user-profile .username {
    font-weight: 600;
    font-size: 0.9rem;
}

/* Page Views Logic */
.tab-view {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.tab-view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   DASHBOARD / PANEL STYLES
   -------------------------------------------------------------------------- */

/* KPI Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
}

.card-icon {
    width: 54px;
    height: 54px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon i {
    width: 26px;
    height: 26px;
}

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

.card-data {
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 6px;
}

.card-data h3 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.card-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

/* Middle Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.2fr 1.8fr;
    gap: 20px;
    margin-bottom: 30px;
}

.dashboard-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.dashboard-card .card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-card .card-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

.dashboard-card .card-body {
    padding: 24px;
    flex-grow: 1;
}

/* Badges */
.badge {
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge.primary { background-color: var(--primary-glow); color: var(--primary-color); }
.badge.success { background-color: var(--success-glow); color: var(--success-color); }
.badge.danger { background-color: var(--danger-glow); color: var(--danger-color); }
.badge.warning { background-color: var(--warning-glow); color: var(--warning-color); }

/* Alerts / Critical Stocks */
.alert-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 250px;
    overflow-y: auto;
}

.alert-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-radius: 10px;
    background-color: rgba(245, 158, 11, 0.06);
    border: 1px solid rgba(245, 158, 11, 0.15);
}

.alert-item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.alert-item-info .title {
    font-size: 0.9rem;
    font-weight: 600;
}

.alert-item-info .subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.alert-item .action-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.empty-state-mini {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state-mini i {
    width: 36px;
    height: 36px;
    margin-bottom: 12px;
    color: var(--success-color);
}

.empty-state-mini p {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Charts Mini Placement */
.chart-container-mini {
    position: relative;
    height: 220px;
    width: 100%;
}

/* Bottom Transactions Table */
.recent-transactions-card {
    margin-bottom: 30px;
}

/* --------------------------------------------------------------------------
   TABLE COMPONENT
   -------------------------------------------------------------------------- */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.table th {
    padding: 16px 24px;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    vertical-align: middle;
}

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

.table tr {
    transition: background-color 0.15s ease;
}

.table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.light-theme .table tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.01);
}

/* Buttons */
.btn {
    border: none;
    outline: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    box-shadow: 0 4px 10px var(--danger-glow);
}

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

.btn-warning {
    background-color: var(--warning-color);
    color: white;
    box-shadow: 0 4px 10px var(--warning-glow);
}

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

.btn-text {
    background: none;
    padding: 6px 12px;
}
.btn-text:hover {
    background-color: var(--border-color);
}

.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-icon:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

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

.btn-icon i {
    width: 16px;
    height: 16px;
}

/* Quick Action / Mini Buttons */
.btn-sm {
    padding: 6px 10px;
    font-size: 0.8rem;
    border-radius: 6px;
}

/* Form Action Bars */
.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.search-box {
    position: relative;
    flex-grow: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 12px 16px 12px 42px;
    border-radius: 10px;
    color: var(--text-primary);
    outline: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.filters {
    display: flex;
    gap: 12px;
}

/* Form Controls */
.form-select, .form-control {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--text-primary);
    outline: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.form-select:focus, .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Custom styled inputs for filters layout */
.filters-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    flex-grow: 1;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-item label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   STOK GÜNCELLEME (QUICK QUANTITY ADJUST)
   -------------------------------------------------------------------------- */
.quick-adjust-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.quantity-badge {
    font-weight: 700;
    font-size: 0.95rem;
    min-width: 40px;
    text-align: center;
}

/* Pagination */
.pagination-container {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.pagination-buttons {
    display: flex;
    gap: 6px;
}

.pagination-btn {
    padding: 6px 12px;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
    background-color: var(--border-color);
    color: var(--text-primary);
}

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

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   REPORTS / CHARTS LAYOUT
   -------------------------------------------------------------------------- */
.report-filters {
    display: flex;
    gap: 16px;
}

.charts-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.charts-layout .large-chart {
    grid-column: span 2;
}

.chart-card {
    min-height: 380px;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.chart-container-donut {
    position: relative;
    height: 280px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* --------------------------------------------------------------------------
   SETTINGS PAGE
   -------------------------------------------------------------------------- */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.category-input-group {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    margin-bottom: 20px;
}

.category-input-group input {
    flex-grow: 1;
}

.category-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 4px;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
}

.light-theme .category-item {
    background-color: rgba(0, 0, 0, 0.01);
}

.category-item span {
    font-weight: 500;
    font-size: 0.9rem;
}

.settings-actions-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-action-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.01);
    gap: 20px;
}

.light-theme .settings-action-card {
    background-color: rgba(0, 0, 0, 0.005);
}

.settings-action-card.border-warning {
    border-color: rgba(245, 158, 11, 0.2);
    background-color: rgba(245, 158, 11, 0.02);
}

.settings-action-card.border-danger {
    border-color: rgba(244, 63, 94, 0.2);
    background-color: rgba(244, 63, 94, 0.02);
}

.action-desc h5 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.action-desc p {
    font-size: 0.8rem;
}

/* File Upload Button Styling */
.upload-btn-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.upload-btn-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   MODAL WINDOW DIALOGS
   -------------------------------------------------------------------------- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-dialog {
    width: 100%;
    max-width: 550px;
    padding: 16px;
    transform: scale(0.95);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal.active .modal-dialog {
    transform: scale(1);
}

.modal-sm {
    max-width: 400px;
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--modal-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.modal-header.header-danger {
    background-color: rgba(244, 63, 94, 0.05);
    border-bottom-color: rgba(244, 63, 94, 0.15);
}

.modal-header.header-danger h3 {
    color: var(--danger-color);
}

.btn-close-modal {
    background: none;
    border: none;
    outline: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.15s ease;
}

.btn-close-modal:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* Modal Form elements styling */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group-row .form-group {
    margin-bottom: 0;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
}

/* Radio toggle group button style */
.radio-toggle-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 4px;
}

.radio-toggle-group input[type="radio"] {
    display: none;
}

.toggle-btn-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.01);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.radio-toggle-group input[type="radio"]:checked + .toggle-btn-label.success {
    background-color: var(--success-glow);
    border-color: var(--success-color);
    color: var(--success-color);
}

.radio-toggle-group input[type="radio"]:checked + .toggle-btn-label.danger {
    background-color: var(--danger-glow);
    border-color: var(--danger-color);
    color: var(--danger-color);
}

/* --------------------------------------------------------------------------
   TOAST NOTIFICATION COMPONENT
   -------------------------------------------------------------------------- */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1100;
    pointer-events: none;
}

.toast {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    padding: 14px 20px;
    border-radius: 8px;
    box-shadow: var(--modal-shadow);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    width: 320px;
    pointer-events: auto;
    animation: slideIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), fadeOut 0.3s ease-out 2.7s forwards;
}

.toast i {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

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

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

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

@keyframes slideIn {
    from { transform: translateX(50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

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

/* --------------------------------------------------------------------------
   RESPONSIVE DESIGN (MEDIA QUERIES)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
    }
    
    .sidebar .logo-text,
    .sidebar .theme-text {
        display: none;
    }
    
    .sidebar-header {
        padding: 16px;
        justify-content: center;
    }
    
    .sidebar-menu {
        padding: 16px 8px;
    }
    
    .nav-item {
        justify-content: center;
        padding: 12px;
    }
    
    .nav-item span {
        display: none;
    }
    
    .main-content {
        margin-left: 80px;
        padding: 20px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .charts-layout {
        grid-template-columns: 1fr;
    }
    
    .charts-layout .large-chart {
        grid-column: span 1;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        width: 100vw;
        height: 60px;
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
    }
    
    .sidebar-header, .sidebar-footer {
        display: none;
    }
    
    .sidebar-menu {
        flex-direction: row;
        width: 100%;
        justify-content: space-around;
        padding: 6px;
        gap: 0;
    }
    
    .nav-item {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2px;
        padding: 4px;
        flex-grow: 1;
        font-size: 0.7rem;
    }
    
    .nav-item i {
        width: 18px;
        height: 18px;
    }
    
    .nav-item span {
        display: block;
        font-size: 0.65rem;
    }
    
    .nav-item:hover i {
        transform: none;
    }
    
    .main-content {
        margin-left: 0;
        margin-bottom: 60px;
        padding: 16px;
    }
    
    .main-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        margin-bottom: 20px;
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .action-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: 100%;
    }
    
    .filters {
        width: 100%;
        justify-content: space-between;
    }
    
    .filters select, .filters button {
        flex-grow: 1;
    }
    
    .filters-grid {
        flex-direction: column;
    }
    
    .form-group-row {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   LOGIN SCREEN STYLES
   ========================================================================== */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-app);
    background-image: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
                      radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.login-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--modal-shadow);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.login-header {
    text-align: center;
}

.login-logo {
    display: inline-flex;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    margin-bottom: 16px;
}

.login-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.login-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.login-form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.login-input {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.login-btn {
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    border: none;
    border-radius: 8px;
    padding: 14px;
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.login-btn:hover {
    opacity: 0.9;
}

.login-btn:active {
    transform: scale(0.98);
}

.login-error {
    background-color: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.2);
    color: var(--danger-color);
    border-radius: 8px;
    padding: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    display: none;
    align-items: center;
    gap: 8px;
}