:root {
    --primary: #16a34a;
    --primary-light: #22c55e;
    --primary-lighter: #4ade80;
    --primary-dark: #15803d;
    --primary-darker: #166534;
    --on-primary: #ffffff;
    --primary-container: #dcfce7;
    --on-primary-container: #052e16;
    --secondary: #64748b;
    --secondary-container: #f1f5f9;
    --on-secondary-container: #1e293b;
    --surface: #ffffff;
    --surface-variant: #f8fafc;
    --background: #f0fdf4;
    --on-surface: #1e293b;
    --on-surface-variant: #475569;
    --outline: #cbd5e1;
    --outline-variant: #e2e8f0;
    --error: #ef4444;
    --error-container: #fef2f2;
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.06);
    --shadow-xl: 0 16px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 72px;
    --navbar-height: 64px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--background);
    min-height: 100vh;
    color: var(--on-surface);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* -- Top Navbar -- */
.navbar {
    height: var(--navbar-height);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
    box-shadow: 0 2px 8px rgba(22, 163, 74, 0.2);
    z-index: 1050;
    position: fixed;
    top: 0; left: 0; right: 0;
    padding: 0 1.25rem;
}

.navbar-brand {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.navbar-brand img { height: 34px; width: auto; border-radius: 6px; }

.nav-search {
    position: relative;
    max-width: 480px;
    width: 100%;
}

.nav-search .form-control {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 10px;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    color: #fff;
    font-size: 0.875rem;
    transition: var(--transition);
    height: 40px;
}

.nav-search .form-control::placeholder { color: rgba(255,255,255,0.7); }
.nav-search .form-control:focus { background: rgba(255,255,255,0.25); border-color: rgba(255,255,255,0.4); box-shadow: none; }
.nav-search .bi-search { position: absolute; left: 0.875rem; top: 50%; transform: translateY(-50%); color: rgba(255,255,255,0.7); font-size: 0.9rem; }

.navbar .nav-link { 
    color: rgba(255,255,255,0.85) !important;
    padding: 0.5rem 0.75rem !important;
    border-radius: 10px;
    transition: var(--transition);
    font-size: 0.9rem;
    position: relative;
}

.navbar .nav-link:hover { background: rgba(255,255,255,0.12); color: #fff !important; }

.notif-badge {
    position: absolute;
    top: 4px; right: 4px;
    width: 18px; height: 18px;
    background: var(--error);
    border: 2px solid var(--primary);
    border-radius: 50%;
    font-size: 0.6rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    line-height: 1;
}

#sidebarToggle {
    border: none; background: transparent; color: #fff;
    padding: 0.5rem; border-radius: 10px; transition: var(--transition);
    font-size: 1.25rem;
}

#sidebarToggle:hover { background: rgba(255,255,255,0.12); }

/* -- Wrapper -- */
.wrapper { display: flex; margin-top: var(--navbar-height); min-height: calc(100vh - var(--navbar-height)); }

/* -- Sidebar -- */
.sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--outline-variant);
    position: fixed;
    left: 0;
    top: var(--navbar-height);
    height: calc(100vh - var(--navbar-height));
    overflow-y: auto;
    overflow-x: hidden;
    transition: width var(--transition);
    z-index: 1040;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--outline); border-radius: 4px; }

.sidebar-header {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--outline-variant);
    background: var(--surface-variant);
}

.user-avatar {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-avatar i { font-size: 1.35rem; color: var(--primary); }

.user-details h6 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--on-surface);
    margin-bottom: 0;
    line-height: 1.3;
}

.user-details small { font-size: 0.75rem; color: var(--on-surface-variant); }
.user-details .badge { font-size: 0.65rem; margin-top: 2px; }

.sidebar-nav { padding: 0.75rem 0; }

.sidebar-nav .nav-item { margin: 0.125rem 0.5rem; }
.sidebar-nav .nav-link {
    color: var(--on-surface-variant);
    padding: 0.625rem 0.875rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.875rem;
    gap: 0.75rem;
    cursor: pointer;
}

.sidebar-nav .nav-link i:first-child {
    width: 20px;
    text-align: center;
    font-size: 1rem;
    flex-shrink: 0;
}

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

.sidebar-nav .nav-link.active {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 4px 12px rgba(22, 163, 74, 0.3);
}

.sidebar-nav .nav-link .bi-chevron-down {
    margin-left: auto;
    transition: transform var(--transition);
    font-size: 0.75rem;
}

.sidebar-nav .nav-link[aria-expanded="true"] .bi-chevron-down {
    transform: rotate(180deg);
}

.sidebar-nav .collapse .nav-link {
    padding-left: 1rem;
    font-size: 0.825rem;
}

.nav-divider {
    height: 1px;
    background: var(--outline-variant);
    margin: 0.5rem 0.75rem;
}

.sidebar-nav .badge {
    font-size: 0.6rem;
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    font-weight: 600;
}

/* Collapsed Sidebar */
body.sidebar-collapsed .sidebar { width: var(--sidebar-collapsed-width); }
body.sidebar-collapsed .sidebar .user-details,
body.sidebar-collapsed .sidebar .nav-link span:not(.bi),
body.sidebar-collapsed .sidebar .nav-link .badge,
body.sidebar-collapsed .sidebar .nav-divider { display: none; }
body.sidebar-collapsed .sidebar .nav-link { justify-content: center; padding: 0.625rem; }
body.sidebar-collapsed .sidebar .nav-link i:first-child { margin: 0; font-size: 1.15rem; }
body.sidebar-collapsed .main-content { margin-left: var(--sidebar-collapsed-width); }
body.sidebar-collapsed .sidebar-nav .collapse { display: none !important; }

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

.content-wrapper {
    padding: 1.5rem 2rem;
    max-width: 1400px;
}

/* -- Cards (MD3) -- */
.card {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition), transform var(--transition);
    background: var(--surface);
    margin-bottom: 1.5rem;
}

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

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--outline-variant);
    padding: 1.125rem 1.25rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--on-surface);
    border-radius: var(--radius-md) var(--radius-md) 0 0 !important;
}

.card-header.bg-primary,
.card-header.bg-info {
    background: transparent !important;
    color: var(--on-surface) !important;
    border-bottom: 1px solid var(--outline-variant);
}

.card-body { padding: 1.25rem; }

/* -- Stat Cards -- */
.stat-card {
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border: none;
}

.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-card .stat-icon { font-size: 2.5rem; opacity: 0.15; position: absolute; right: 1rem; bottom: 1rem; transition: var(--transition); }
.stat-card:hover .stat-icon { opacity: 0.25; transform: scale(1.1); }
.stat-card .stat-label { font-size: 0.8rem; font-weight: 500; opacity: 0.85; letter-spacing: 0.3px; text-transform: uppercase; }
.stat-card .stat-value { font-size: 2rem; font-weight: 700; line-height: 1.2; }
.stat-card .stat-trend { font-size: 0.75rem; display: inline-flex; align-items: center; gap: 0.25rem; }

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

/* -- Charts -- */
.chart-container {
    position: relative;
    height: 280px;
    width: 100%;
}

.chart-container-sm {
    height: 220px;
}

/* -- Welcome Banner -- */
.welcome-banner {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 50%, #bbf7d0 100%);
    border-radius: var(--radius-lg);
    padding: 1.75rem 2rem;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(22, 163, 74, 0.1);
}

.welcome-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(34, 197, 94, 0.06);
}

.welcome-banner h4 { font-weight: 700; color: var(--primary-dark); margin-bottom: 0.25rem; }
.welcome-banner p { color: var(--on-surface-variant); margin-bottom: 0; font-size: 0.9rem; }

/* -- Tables (MD3 + DataTables) -- */
.table {
    margin-bottom: 0;
    font-size: 0.875rem;
}

.table thead th {
    border: none;
    font-weight: 600;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    padding: 0.875rem 0.75rem;
    background: var(--surface-variant);
}

.table tbody td {
    padding: 0.75rem;
    border-color: var(--outline-variant);
    vertical-align: middle;
}

.table tbody tr { transition: background var(--transition); }
.table tbody tr:hover { background: var(--primary-container); }

/* DataTables overrides */
.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter {
    margin-bottom: 0.75rem;
}

.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--outline);
    border-radius: 8px;
    padding: 0.375rem 0.75rem;
    font-size: 0.85rem;
    outline: none;
}

.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    border-radius: 6px !important;
    padding: 0.25rem 0.625rem !important;
    font-size: 0.8rem;
    margin: 0 2px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary) !important;
    color: #fff !important;
    border-color: var(--primary) !important;
}

.dataTables_wrapper .dataTables_info {
    font-size: 0.8rem;
    color: var(--on-surface-variant);
}

/* -- Activity Timeline -- */
.activity-timeline {
    position: relative;
}

.activity-timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--outline-variant);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    padding-bottom: 1.25rem;
}

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

.timeline-icon {
    position: absolute;
    left: 8px;
    top: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--surface);
    border: 2px solid var(--outline-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-icon i { font-size: 0.5rem; }

.timeline-content .timeline-action {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--on-surface);
}

.timeline-content .timeline-user {
    font-size: 0.8rem;
    color: var(--on-surface-variant);
}

.timeline-content .timeline-time {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
}

.timeline-icon.bg-primary { border-color: var(--primary); }
.timeline-icon.bg-warning { border-color: var(--warning-color, #f59e0b); }
.timeline-icon.bg-danger { border-color: var(--error); }
.timeline-icon.bg-success { border-color: var(--primary-light); }
.timeline-icon.bg-info { border-color: var(--info-color, #3b82f6); }

/* -- Quick Actions -- */
.quick-action-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    background: var(--surface);
    border: 1px solid var(--outline-variant);
    text-decoration: none;
    transition: var(--transition);
    color: var(--on-surface);
    height: 100%;
}

.quick-action-card:hover {
    border-color: var(--primary);
    background: var(--primary-container);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--on-surface);
}

.quick-action-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.25rem;
    color: #fff;
}

.quick-action-text { font-weight: 600; font-size: 0.85rem; }
.quick-action-sub { font-size: 0.75rem; color: var(--on-surface-variant); }

/* -- Buttons (MD3) -- */
.btn {
    border-radius: 10px;
    padding: 0.5rem 1.125rem;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    border: none;
}

.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

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

.btn-primary:hover { background: var(--primary-dark); }

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

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

.btn-ghost {
    background: transparent;
    color: var(--on-surface-variant);
}

.btn-ghost:hover { background: var(--surface-variant); color: var(--on-surface); box-shadow: none; }

.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8rem; border-radius: 8px; }

/* -- Badges -- */
.badge {
    padding: 0.3rem 0.625rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.7rem;
}

/* -- Forms -- */
.form-control, .form-select {
    border-radius: 10px;
    border: 1px solid var(--outline);
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.12);
}

/* -- Alerts -- */
.alert {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 1rem 1.25rem;
}

/* -- Footer -- */
.footer {
    background: var(--surface) !important;
    border-top: 1px solid var(--outline-variant);
    padding: 1rem 0;
}

.footer small { font-size: 0.8rem; }

/* -- Avatars -- */
.avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8rem;
    color: #fff;
    flex-shrink: 0;
}

.avatar-sm { width: 28px; height: 28px; font-size: 0.65rem; }
.avatar-lg { width: 44px; height: 44px; font-size: 0.95rem; }

/* -- Sidebar Overlay (Mobile) -- */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1039;
    backdrop-filter: blur(4px);
}

.sidebar-overlay.show { display: block; }

/* -- Page Headers -- */
.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--on-surface);
    margin-bottom: 0.25rem;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    margin-bottom: 1.5rem;
}

/* -- Spacing utilities -- */
.section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--on-surface);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* -- Notifications Dropdown -- */
.notif-dropdown .dropdown-menu {
    width: 340px;
    padding: 0;
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-lg);
}

.notif-dropdown .dropdown-header {
    padding: 0.875rem 1rem;
    font-weight: 600;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--outline-variant);
}

.notif-dropdown .dropdown-item {
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    border-bottom: 1px solid var(--outline-variant);
    white-space: normal;
}

.notif-dropdown .dropdown-item:last-child { border-bottom: none; }
.notif-dropdown .dropdown-item:hover { background: var(--primary-container); }

/* -- Profile Dropdown -- */
.profile-dropdown .dropdown-menu {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    min-width: 200px;
}

.profile-dropdown .dropdown-item {
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

.profile-dropdown .dropdown-item:hover { background: var(--primary-container); }

/* -- Responsive -- */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
        border-right: none;
    }
    .sidebar.show { transform: translateX(0); }
    .main-content { margin-left: 0 !important; }
    .content-wrapper { padding: 1rem; }
    .dashboard-stats { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
    .nav-search { max-width: 280px; }
    .navbar-brand span { display: none; }
}

@media (max-width: 768px) {
    .content-wrapper { padding: 0.75rem; }
    .card-body { padding: 1rem; }
    .welcome-banner { padding: 1.25rem; }
    .welcome-banner h4 { font-size: 1.1rem; }
    .stat-card .stat-value { font-size: 1.5rem; }
    .dashboard-stats { grid-template-columns: 1fr; gap: 0.875rem; }
    .nav-search { max-width: 200px; }
    .navbar .nav-link span.nav-text { display: none; }
}

@media (max-width: 576px) {
    .content-wrapper { padding: 0.5rem; }
    .card-header, .card-body { padding: 0.75rem; }
    .nav-search { max-width: 160px; }
    .dataTables_wrapper .dataTables_length,
    .dataTables_wrapper .dataTables_filter {
        text-align: left;
    }
    .dataTables_wrapper .dataTables_filter input { width: 160px; }
}

/* -- Page loading fade -- */
@keyframes pageFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-fade-in {
    animation: pageFadeIn 0.3s ease-out;
}

/* -- Bootstrap utility overrides -- */
.text-primary { color: var(--primary) !important; }
.bg-primary { background-color: var(--primary) !important; }
.border-primary { border-color: var(--primary) !important; }
.link-primary { color: var(--primary) !important; }
.link-primary:hover { color: var(--primary-dark) !important; }

/* Custom utility classes */
.fs-7 {
    font-size: 0.75rem;
}

.text-orange {
    color: #fd7e14;
}

.text-purple {
    color: #6f42c1;
}

.btn-outline-purple {
    color: #6f42c1;
    border-color: #6f42c1;
}

.btn-outline-purple:hover {
    background-color: #6f42c1;
    border-color: #6f42c1;
    color: white;
}