:root {
    /* Color Palette - Light Theme */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Solid Colors */
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --primary-light: #8b9cff;
    --secondary-color: #764ba2;
    --success-color: #0ea5e9;
    --success-dark: #0284c7;
    --warning-color: #f59e0b;
    --warning-dark: #d97706;
    --danger-color: #f5576c;
    --danger-dark: #dc2626;

    /* Neutral Colors */
    --bg-primary: #f8f9fe;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f3f9;
    --bg-hover: #e8ebf5;
    --sidebar-bg: #ffffff;
    --sidebar-hover: #f1f3f9;

    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    /* Border & Shadow */
    --border-color: rgba(102, 126, 234, 0.12);
    --border-light: rgba(102, 126, 234, 0.08);
    --border-focus: rgba(102, 126, 234, 0.4);
    --shadow-sm: 0 2px 8px rgba(102, 126, 234, 0.06);
    --shadow-md: 0 4px 16px rgba(102, 126, 234, 0.08);
    --shadow-lg: 0 8px 32px rgba(102, 126, 234, 0.12);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.2);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Sizes */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 80px;
    --topbar-height: 70px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    overflow-x: hidden;
}

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

.sidebar-header {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-light);
    min-height: var(--topbar-height);
    overflow: hidden;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.sidebar.collapsed .logo {
    display: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.sidebar.collapsed .logo-text {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
}

.sidebar-toggle:hover {
    background: var(--bg-hover);
    color: var(--primary-color);
}

/* Ensure toggle button is visible when collapsed */
.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: var(--spacing-md) 0;
}

.sidebar.collapsed .sidebar-toggle {
    display: flex;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Hide scrollbar but keep functionality */
.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.2);
    border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.3);
}

/* Hide scrollbar completely when collapsed */
.sidebar.collapsed .sidebar-nav::-webkit-scrollbar {
    width: 0;
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin: 0.25rem var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

/* Center nav items when collapsed */
.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0;
    margin: 0.25rem auto;
    width: 48px;
    height: 48px;
}

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

.nav-item.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* Make active nav items more prominent when collapsed */
.sidebar.collapsed .nav-item.active {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
}

.nav-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.nav-text {
    font-weight: 500;
    white-space: nowrap;
    transition: opacity var(--transition-normal);
}

.sidebar.collapsed .nav-text {
    opacity: 0;
    width: 0;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.sidebar.collapsed .sidebar-footer {
    padding: var(--spacing-md) 0;
    display: flex;
    justify-content: center;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.user-info {
    flex: 1;
    min-width: 0;
    transition: opacity var(--transition-normal);
}

.sidebar.collapsed .user-info {
    opacity: 0;
    width: 0;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-normal);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

/* Top Bar */
.top-bar {
    height: var(--topbar-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.mobile-menu-btn:hover {
    background: var(--bg-hover);
    color: var(--primary-color);
}

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

.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.search-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    min-width: 300px;
    transition: all var(--transition-fast);
}

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

.search-bar svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-bar input {
    border: none;
    background: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    width: 100%;
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    position: relative;
}

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

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--danger-color);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.4rem;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.user-avatar-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--border-light);
    transition: all var(--transition-fast);
}

.user-avatar-img:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

/* Content Area */
.content-area {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 28px;
    height: 28px;
    stroke-width: 2;
}

.stat-icon-primary {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    color: var(--primary-color);
}

.stat-icon-success {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(0, 242, 254, 0.15) 100%);
    color: var(--success-color);
}

.stat-icon-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(254, 225, 64, 0.15) 100%);
    color: var(--warning-color);
}

.stat-icon-danger {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.15) 0%, rgba(240, 147, 251, 0.15) 100%);
    color: var(--danger-color);
}

.stat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

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

.stat-change {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    font-weight: 600;
}

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

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

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-md);
}

.chart-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.card-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.chart-filter {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chart-filter:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* Bottom Grid */
.bottom-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-md);
}

.table-card,
.activity-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

/* Data Table */
.table-container {
    overflow-x: auto;
}

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

.data-table thead {
    background: var(--bg-tertiary);
}

.data-table th {
    padding: var(--spacing-sm);
    text-align: left;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: var(--spacing-sm);
    border-top: 1px solid var(--border-light);
    font-size: 0.9rem;
    color: var(--text-primary);
}

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

.data-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-completed {
    background: rgba(14, 165, 233, 0.15);
    color: var(--success-dark);
}

.status-pending {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-dark);
}

.status-processing {
    background: rgba(102, 126, 234, 0.15);
    color: var(--primary-dark);
}

.status-cancelled {
    background: rgba(245, 87, 108, 0.15);
    color: var(--danger-dark);
}

/* Activity List */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.activity-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.2rem;
}

.activity-icon.icon-success {
    background: rgba(14, 165, 233, 0.15);
    color: var(--success-color);
}

.activity-icon.icon-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

.activity-icon.icon-danger {
    background: rgba(245, 87, 108, 0.15);
    color: var(--danger-color);
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.activity-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Buttons */
.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* Page Section */
.page-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.page-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.page-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 1200px) {

    .charts-grid,
    .bottom-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .search-bar {
        min-width: auto;
        flex: 1;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .top-bar {
        padding: 0 var(--spacing-sm);
    }

    .content-area {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.25rem;
    }

    .search-bar {
        display: none;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}