:root {
  --color-primary: #22c0e8;
  --color-primary-dark: #1a9bb8;
  --color-primary-light: rgba(34, 192, 232, 0.12);
  --sidebar-bg: #1e2a38;
  --sidebar-hover: rgba(255, 255, 255, 0.08);
  --sidebar-active: rgba(34, 192, 232, 0.18);
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --topbar-height: 64px;
  --content-bg: #f4f6f9;
  --card-bg: #ffffff;
  --text-muted: #6c757d;
  --border-color: #e9ecef;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--content-bg);
  color: #212529;
}

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

.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  color: #fff;
  display: flex;
  flex-direction: column;
  z-index: 1040;
  transition: width 0.25s ease, transform 0.25s ease;
  overflow: hidden;
}

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

.app-sidebar.collapsed .sidebar-brand-text,
.app-sidebar.collapsed .sidebar-link-text,
.app-sidebar.collapsed .sidebar-section-title,
.app-sidebar.collapsed .sidebar-submenu,
.app-sidebar.collapsed .sidebar-collapse-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
  white-space: nowrap;
}

.app-sidebar.collapsed .sidebar-link {
  justify-content: center;
  padding: 0.65rem;
}

.app-sidebar.collapsed .sidebar-link i {
  margin-right: 0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  padding: 1.25rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 64px;
}

.sidebar-brand img {
  max-width: 140px;
  height: auto;
  transition: max-width 0.25s ease;
}

.app-sidebar.collapsed .sidebar-brand img {
  max-width: 36px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.75rem 0;
}

.sidebar-section {
  margin-bottom: 0.5rem;
}

.sidebar-section-title {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  padding: 0.85rem 1.25rem 0.4rem;
  transition: opacity 0.25s ease;
}

.sidebar-group {
  margin-bottom: 0.15rem;
}

.sidebar-group-label {
  display: flex;
  align-items: center;
  padding: 0.45rem 1.25rem 0.25rem;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sidebar-group-label i {
  width: 20px;
  margin-right: 0.75rem;
  text-align: center;
  flex-shrink: 0;
  font-size: 0.7rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  padding: 0.6rem 1.25rem;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.875rem;
  border-left: 3px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.sidebar-link:hover {
  background: var(--sidebar-hover);
  color: #fff;
  text-decoration: none;
}

.sidebar-link.active {
  background: var(--sidebar-active);
  color: #fff;
  border-left-color: var(--color-primary);
}

.sidebar-link i {
  width: 20px;
  margin-right: 0.75rem;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-submenu {
  padding-left: 0;
}

.sidebar-submenu.always-open {
  display: block;
  height: auto;
}

.sidebar-submenu .sidebar-link {
  padding-left: 2.75rem;
  font-size: 0.8125rem;
}

.sidebar-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.75rem;
}

.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8125rem;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

.sidebar-collapse-btn:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.sidebar-collapse-btn i {
  margin-right: 0.5rem;
  transition: transform 0.25s ease;
}

.app-sidebar.collapsed .sidebar-collapse-btn i {
  transform: rotate(180deg);
  margin-right: 0;
}

.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left 0.25s ease;
}

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

.app-topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-height);
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 1030;
}

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

.topbar-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.25rem;
  color: #495057;
  cursor: pointer;
  padding: 0.25rem;
}

.breadcrumb-nav {
  margin: 0;
  padding: 0;
  background: transparent;
  font-size: 0.8125rem;
}

.breadcrumb-nav .breadcrumb-item a {
  color: var(--text-muted);
}

.breadcrumb-nav .breadcrumb-item.active {
  color: #212529;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.topbar-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 600;
}

.topbar-user-info {
  line-height: 1.2;
}

.topbar-user-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: #212529;
}

.topbar-user-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.app-content {
  flex: 1;
  padding: 1.5rem;
}

/* Page header */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: #212529;
}

.page-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

.page-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* Metric cards */
.metric-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  height: 100%;
}

.metric-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.metric-card-value {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.metric-card-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

/* Filter toolbar */
.filter-toolbar {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.filter-toolbar .form-control,
.filter-toolbar .btn {
  font-size: 0.875rem;
}

/* Cards */
.app-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.app-card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 0.9375rem;
}

.app-card-body {
  padding: 1.25rem;
}

.app-card-body.p-0 {
  padding: 0;
}

/* Tables */
.app-table {
  margin: 0;
  font-size: 0.875rem;
}

.app-table thead th {
  background: #f8f9fa;
  border-bottom: 1px solid var(--border-color);
  border-top: none;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  padding: 0.75rem 1rem;
  white-space: nowrap;
}

.app-table tbody td {
  padding: 0.75rem 1rem;
  vertical-align: middle;
  border-top: 1px solid var(--border-color);
}

.app-table tbody tr:hover {
  background: #f8f9fa;
}

/* Buttons */
.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: var(--color-primary-dark) !important;
  border-color: var(--color-primary-dark) !important;
}

.btn-outline-primary {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

/* Form sections */
.form-section {
  margin-bottom: 1.5rem;
}

.form-section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* Period filter buttons */
.period-buttons .btn {
  font-size: 0.8125rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

.period-buttons .btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* Chart cards */
.chart-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.chart-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.chart-card-canvas {
  position: relative;
  height: 220px;
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1035;
}

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

/* Login page */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--content-bg);
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-md);
}

.login-card .btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Legacy overrides */
.container-fluid {
  padding-top: 0;
  padding-bottom: 0;
}

.container {
  padding-top: 0;
}

.modal {
  z-index: 1055;
}

.modal-backdrop {
  z-index: 1050;
}

/* Mobile */
@media (max-width: 991.98px) {
  .app-sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width) !important;
  }

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

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

  .app-main {
    margin-left: 0 !important;
  }

  .topbar-toggle {
    display: block;
  }

  .topbar-user-info {
    display: none;
  }
}

@media (max-width: 575.98px) {
  .app-content {
    padding: 1rem;
  }

  .page-header-top {
    flex-direction: column;
  }
}