@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.1);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);

  --bg-color: #f8fafc;
  --surface-color: #ffffff;
  --surface-hover: #f1f5f9;
  --border-color: #e2e8f0;
  --text-color: #0f172a;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-hover: #1e293b;
  --sidebar-active: #6366f1;
  --sidebar-active-text: #ffffff;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.2s ease-in-out;
}

[data-theme="dark"] {
  --bg-color: #0f172a;
  --surface-color: #1e293b;
  --surface-hover: #334155;
  --border-color: #334155;
  --text-color: #f8fafc;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --sidebar-bg: #020617;
  --sidebar-text: #94a3b8;
  --sidebar-hover: #1e293b;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

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

/* Sidebar */
.sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: var(--transition);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--text-color);
}

.brand-logo .logo-bry {
  color: var(--primary);
}

.brand-logo .logo-download {
  color: #ffffff;
}

.sidebar-nav {
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  color: var(--sidebar-text);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.925rem;
  transition: var(--transition);
}

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

.nav-item.active {
  background-color: var(--sidebar-active);
  color: var(--sidebar-active-text);
  font-weight: 600;
}

.nav-item i {
  font-size: 1.1rem;
  width: 1.25rem;
  text-align: center;
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.user-profile-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
}

.user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

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

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

/* Main Content Layout */
.main-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Top Navbar */
.navbar {
  height: 64px;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 90;
  transition: var(--transition);
}

.navbar-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
}

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

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background-color: var(--surface-hover);
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

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

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Page Body */
.page-body {
  padding: 2rem;
  flex: 1;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Grid & Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-icon.indigo { background: var(--primary-light); color: var(--primary); }
.stat-icon.emerald { background: var(--success-bg); color: var(--success); }
.stat-icon.amber { background: var(--warning-bg); color: var(--warning); }
.stat-icon.rose { background: var(--danger-bg); color: var(--danger); }
.stat-icon.blue { background: var(--info-bg); color: var(--info); }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  margin-top: 0.15rem;
}

/* Sections Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.5rem;
}

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

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

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-body {
  padding: 1.25rem 1.5rem;
  flex: 1;
}

/* Tables & Controls */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.table th {
  background-color: var(--surface-hover);
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
  color: var(--text-color);
}

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

.table tbody tr:hover {
  background-color: var(--surface-hover);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-secondary { background: var(--surface-hover); color: var(--text-muted); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

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

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

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

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

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

.btn-danger:hover {
  background-color: #dc2626;
}

.btn-icon {
  padding: 0.4rem;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

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

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

/* Forms & Search Bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 240px;
}

.search-box i {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.85rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.875rem;
  outline: none;
  transition: var(--transition);
}

.search-box .form-control {
  padding-left: 2.5rem;
}

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

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 0.4rem;
}

.form-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

/* Toggle Switches */
.toggle-switch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
}

.toggle-switch span {
  font-size: 0.875rem;
  font-weight: 500;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--border-color);
  transition: .3s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 550px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: var(--transition);
}

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

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

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

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
}

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

.modal-body {
  padding: 1.5rem;
}

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

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.page-btn {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  color: var(--text-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition);
}

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

.page-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Activity / Lists */
.activity-list, .recent-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

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

.activity-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.activity-details {
  flex: 1;
}

.activity-text {
  font-size: 0.875rem;
  color: var(--text-color);
}

.activity-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* Toast Container */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
  color: var(--text-color);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  animation: slideIn 0.3s ease-out forwards;
}

.toast-success { border-left-color: var(--success); }
.toast-error { border-left-color: var(--danger); }
.toast-info { border-left-color: var(--info); }
.toast-warning { border-left-color: var(--warning); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-color);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.tab-content {
  display: none;
}

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

/* Empty State & Loading State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-bottom: 0.35rem;
}

.spinner {
  border: 3px solid rgba(0,0,0,0.1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border-left-color: var(--primary);
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  gap: 0.75rem;
  color: var(--text-muted);
}

/* Responsive UI */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

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

  .mobile-menu-toggle {
    display: block;
  }
}

@media (max-width: 640px) {
  .page-body {
    padding: 1rem;
  }

  .navbar {
    padding: 0 1rem;
  }

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

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