/* Premium Vanilla CSS for Simple Chatbot */
:root {
  --primary-color: #1a73e8;
  --primary-hover: #174ea6;
  --sidebar-bg: #f8f9fa;
  --main-bg: #ffffff;
  --border-color: #dadce0;
  --text-primary: #3c4043;
  --text-secondary: #5f6368;
  --success-color: #0f9d58;
  --danger-color: #d93025;
  --font-family: "Google Sans", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--main-bg);
  color: var(--text-primary);
  display: flex;
  height: 100vh;
  overflow: hidden;
  font-size: 14px;
}

/* Sidebar Styling */
.nexus-sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-header .logo {
  width: 32px;
  height: 32px;
  background-color: #f29900;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  font-weight: bold;
}

.sidebar-header h1 {
  font-size: 14px;
  font-weight: 600;
}

.tenant-selector-wrapper {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

.tenant-selector {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: var(--font-family);
  font-size: 13px;
  color: var(--text-primary);
  background-color: var(--card-bg);
  outline: none;
}

.tenant-selector:focus {
  border-color: var(--primary-color);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding-top: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.nav-item:hover {
  background-color: rgba(26, 115, 232, 0.08);
  color: var(--text-primary);
}

.nav-item.active {
  background-color: #e8f0fe;
  color: var(--primary-color);
  border-right: 3px solid var(--primary-color);
}

.nav-item i {
  margin-right: 12px;
  font-size: 18px;
  width: 20px;
  text-align: center;
  border-radius: var(--border-radius);
}

.nav-divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 8px 0;
}

/* Main Content Area */
.nexus-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--main-bg);
  position: relative;
}

.main-header {
  height: 56px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.content-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.content-section {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

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

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.btn-secondary {
  background-color: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-danger {
  color: var(--danger-color);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
}

.btn-danger:hover {
  background-color: rgba(217, 48, 37, 0.1);
}

/* Forms */
.nexus-form {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--text-primary);
  background-color: var(--card-bg);
  transition: border-color 0.2s;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-color);
}

/* Data Tables */
.data-table-container {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

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

.data-table th {
  background-color: var(--sidebar-bg);
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-primary);
}

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

.data-table tr:hover td {
  background-color: var(--sidebar-bg);
}

.td-actions {
  text-align: right;
}

.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 48px;
  color: #dadce0;
  margin-bottom: 16px;
}

/* Right Sidebar Console */
.nexus-console {
  width: 320px;
  background-color: var(--sidebar-bg);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.console-header {
  height: 56px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 500;
}

.chat-history {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--border-radius-large);
  font-size: 13px;
  line-height: 1.5;
}

.chat-user {
  align-self: flex-end;
  background-color: #e8f0fe;
  color: var(--primary-color);
  border-bottom-right-radius: 2px;
}

.chat-bot {
  align-self: flex-start;
  background-color: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 2px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.console-input {
  padding: 16px;
  background-color: var(--sidebar-bg);
  border-top: 1px solid var(--border-color);
}

.console-input input {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  outline: none;
  font-family: var(--font-family);
  font-size: 13px;
  background-color: var(--main-bg);
  color: var(--text-primary);
}

.console-input input:focus {
  border-color: var(--primary-color);
}

/* Notifications */
.notification {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: var(--border-radius);
  color: white;
  font-size: 14px;
  font-weight: 500;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  display: none;
}

.notification.success {
  background-color: var(--success-color);
}

.notification.error {
  background-color: var(--danger-color);
}

/* Analytics Dashboard */
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.metric-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}

.metric-card h3 {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.metric-card .value {
  font-size: 28px;
  font-weight: 500;
  color: var(--primary-color);
}

.chart-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  margin-bottom: 24px;
}

.chart-card h3 {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 16px;
}

/* ==============================================
   THEME SYSTEM — base tokens always available
   ============================================== */
:root {
  --card-bg: #ffffff;
  --border-radius: 2px;
  --border-radius-large: 4px;
}

/* Dynamic typography & shape (set via JS injected <style>) */
body { font-family: var(--font-family); }

.logo, .tenant-selector, .btn-primary, .btn-secondary, .form-control {
  border-radius: var(--border-radius);
}
.nexus-form, .data-table-container, .chat-bubble, .chat-bot, .metric-card, .chart-card {
  border-radius: var(--border-radius-large);
}

/* ==============================================
   DARK MODE — body.dark class
   All values are explicit colors, not variables,
   so they can never be blocked by var() fallbacks.
   ============================================== */
body.dark {
  background-color: #121214 !important;
  color: #e2e2ec !important;
}
body.dark .nexus-sidebar,
body.dark .nexus-console {
  background-color: #1e1e24 !important;
  border-color: #2e2e3e !important;
}
body.dark .nexus-main {
  background-color: #121214 !important;
}
body.dark .sidebar-header,
body.dark .tenant-selector-wrapper,
body.dark .console-header,
body.dark .main-header,
body.dark .nav-divider {
  border-color: #2e2e3e !important;
}
body.dark .sidebar-header h1,
body.dark .console-header,
body.dark .main-header {
  color: #e2e2ec !important;
}
body.dark .nav-item {
  color: #9a9ab0 !important;
}
body.dark .nav-item:hover {
  background-color: rgba(100,120,255,0.10) !important;
  color: #e2e2ec !important;
}
body.dark .nav-item.active {
  background-color: rgba(100,120,255,0.18) !important;
  border-right-color: var(--primary-color) !important;
}
body.dark .nexus-form,
body.dark .metric-card,
body.dark .chart-card,
body.dark .data-table-container {
  background: #1e1e2a !important;
  border-color: #2e2e3e !important;
  color: #e2e2ec !important;
}
body.dark .form-control,
body.dark .tenant-selector,
body.dark input:not([type="color"]),
body.dark select,
body.dark textarea {
  background-color: #121214 !important;
  color: #e2e2ec !important;
  border-color: #2e2e3e !important;
}
body.dark label,
body.dark .form-group label,
body.dark .metric-card h3,
body.dark .chart-card h3 {
  color: #9a9ab0 !important;
}
body.dark h1, body.dark h2, body.dark h3, body.dark h4 {
  color: #e2e2ec !important;
}
body.dark p {
  color: #9a9ab0;
}
body.dark .data-table th {
  background-color: #1e1e24 !important;
  color: #9a9ab0 !important;
  border-color: #2e2e3e !important;
}
body.dark .data-table td {
  color: #e2e2ec !important;
  border-color: #2e2e3e !important;
}
body.dark .data-table tr:hover td {
  background-color: rgba(255,255,255,0.04) !important;
}
body.dark .btn-secondary {
  background-color: #1e1e2a !important;
  color: #e2e2ec !important;
  border-color: #2e2e3e !important;
}
body.dark .btn-secondary:hover {
  background-color: #2e2e3e !important;
}
body.dark .chat-bot {
  background-color: #1e1e2a !important;
  color: #e2e2ec !important;
  border-color: #2e2e3e !important;
}
body.dark .console-input {
  background-color: #1e1e24 !important;
  border-color: #2e2e3e !important;
}
body.dark .console-input input {
  background-color: #121214 !important;
  color: #e2e2ec !important;
  border-color: #2e2e3e !important;
}
body.dark .chat-user {
  background-color: rgba(100,120,255,0.15) !important;
}
body.dark hr {
  border-color: #2e2e3e !important;
}
body.dark .logo-upload-area {
  background: #1e1e24 !important;
  border-color: #2e2e3e !important;
}
body.dark .empty-state,
body.dark .empty-state i {
  color: #9a9ab0 !important;
}

/* (Removed aggressive global radius overrides - use theme tokens defined above) */

/* ---- Logo Upload Drop Zone ---- */
.logo-upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius-large);
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--main-bg);
  position: relative;
}
.logo-upload-area:hover,
.logo-upload-area.drag-over {
  border-color: var(--primary-color);
  background: rgba(26,115,232,0.04);
}
.logo-upload-area input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.logo-upload-area .upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  pointer-events: none;
}
.logo-upload-area .upload-label i {
  font-size: 32px;
  color: var(--text-secondary);
}
.logo-upload-area .upload-label span {
  font-size: 13px;
  color: var(--text-secondary);
}
.logo-upload-area .upload-label strong {
  font-size: 13px;
  color: var(--primary-color);
}

/* Settings Tabs System */
.settings-tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  overflow-x: auto;
}
.settings-tab-btn {
  padding: 12px 20px;
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.settings-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(100, 120, 255, 0.05);
}
.settings-tab-btn.active {
  color: var(--primary-color) !important;
  border-bottom-color: var(--primary-color) !important;
  font-weight: 600;
}
body.dark .settings-tab-btn:hover {
  background: rgba(255, 255, 255, 0.04);
}
.settings-tab-content {
  display: none;
}
.settings-tab-content.active {
  display: block;
}