/* ============================================================
   Evotion RAG — ChatGPT-inspired Dark Theme
   ============================================================ */

/* --- Variables --- */
:root {
  --sidebar-bg: #171717;
  --sidebar-hover: #212121;
  --sidebar-active: #2a2a2a;
  --main-bg: #212121;
  --surface: #2f2f2f;
  --surface-hover: #353535;
  --border: #2e2e2e;
  --border-light: #424242;
  --text-primary: #ececec;
  --text-secondary: #b4b4b4;
  --text-muted: #8e8e8e;
  --text-faint: #666;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --code-bg: #1a1a1a;
  --input-bg: #2f2f2f;
  --input-border: #424242;
  --send-bg: #ffffff;
  --send-color: #000000;
  --send-disabled: #676767;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --sidebar-width: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --transition: 0.15s ease;
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--main-bg);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

a { color: #6ea8fe; text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Layout --- */
.app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  transition: margin-left var(--transition), opacity var(--transition);
  z-index: 100;
}

.sidebar.collapsed {
  margin-left: calc(-1 * var(--sidebar-width));
  opacity: 0;
  pointer-events: none;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 12px 8px;
  flex-shrink: 0;
}

.sidebar-sessions {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
}

.sidebar-sessions::-webkit-scrollbar {
  width: 4px;
}
.sidebar-sessions::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 4px;
}

/* Session items */
.session-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
  margin-bottom: 1px;
}
.session-item:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}
.session-item.active {
  background: var(--sidebar-active);
  color: var(--text-primary);
}
.session-item .session-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
}
.session-item .session-delete {
  display: none;
  color: var(--text-muted);
  padding: 2px;
  border-radius: 4px;
  flex-shrink: 0;
  margin-left: 4px;
}
.session-item:hover .session-delete {
  display: flex;
}
.session-item .session-delete:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.sessions-empty {
  padding: 16px 12px;
  color: var(--text-faint);
  font-size: 13px;
}

.sessions-group-label {
  padding: 12px 12px 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Sidebar footer */
.sidebar-footer {
  padding: 8px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-nav-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  transition: background var(--transition), color var(--transition);
}
.sidebar-nav-btn:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}
.sidebar-nav-btn.active {
  background: var(--sidebar-active);
  color: var(--text-primary);
}

.sidebar-model {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px 6px;
  font-size: 12px;
  color: var(--text-faint);
}

/* --- Icon button --- */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.icon-btn:hover {
  background: var(--sidebar-hover);
  color: var(--text-primary);
}

/* ============================================================
   OVERLAY (mobile sidebar)
   ============================================================ */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
}
.overlay.active {
  display: block;
}

/* ============================================================
   MAIN
   ============================================================ */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--main-bg);
  position: relative;
}

/* Mobile header */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--main-bg);
  flex-shrink: 0;
}
.mobile-title {
  font-size: 16px;
  font-weight: 600;
}

/* ============================================================
   VIEWS
   ============================================================ */
.view {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}
.view.active {
  display: flex;
}

.view-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.view-header h2 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 8px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 13px;
  padding: 4px 0;
  transition: color var(--transition);
}
.back-btn:hover {
  color: var(--text-primary);
}

/* ============================================================
   CHAT VIEW
   ============================================================ */
.chat-scroll {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
}

.chat-scroll::-webkit-scrollbar {
  width: 6px;
}
.chat-scroll::-webkit-scrollbar-thumb {
  background: #3a3a3a;
  border-radius: 3px;
}

/* --- Empty state --- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  min-height: 70vh;
}

.empty-logo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.empty-state h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}

.empty-sub {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 32px;
}

.suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  max-width: 600px;
  width: 100%;
}

.suggestion {
  display: flex;
  flex-direction: column;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: left;
  transition: background var(--transition), border-color var(--transition);
}
.suggestion:hover {
  background: var(--surface);
  border-color: var(--border-light);
}
.suggestion-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.suggestion-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* --- Messages --- */
.messages {
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

.message {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}

.message.user .message-avatar {
  background: #7c3aed;
  color: #fff;
}

.message.assistant .message-avatar {
  background: var(--surface);
  color: var(--text-primary);
}

.message-content {
  flex: 1;
  min-width: 0;
  padding-top: 4px;
}

.message.user .message-content {
  color: var(--text-primary);
}

.message.assistant .message-content {
  color: var(--text-secondary);
}

/* Markdown in assistant messages */
.message-content h1, .message-content h2, .message-content h3 {
  color: var(--text-primary);
  margin: 16px 0 8px;
  font-weight: 600;
}
.message-content h1 { font-size: 20px; }
.message-content h2 { font-size: 17px; }
.message-content h3 { font-size: 15px; }

.message-content p {
  margin-bottom: 12px;
}
.message-content p:last-child {
  margin-bottom: 0;
}

.message-content ul, .message-content ol {
  margin: 8px 0 12px 20px;
}
.message-content li {
  margin-bottom: 4px;
}

.message-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.message-content code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', monospace;
}

.message-content pre {
  background: var(--code-bg);
  border-radius: var(--radius-sm);
  margin: 12px 0;
  overflow-x: auto;
  position: relative;
}
.message-content pre code {
  display: block;
  padding: 16px;
  background: transparent;
  font-size: 13px;
  line-height: 1.5;
}

.message-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

.message-content blockquote {
  border-left: 3px solid var(--border-light);
  padding-left: 12px;
  color: var(--text-muted);
  margin: 12px 0;
}

.message-content a {
  color: #6ea8fe;
}

/* Sources */
.sources {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.source-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--surface);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-muted);
}
.source-chip .source-name {
  color: var(--text-secondary);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 8px 0;
}
.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typingBounce 1.4s ease-in-out infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* ============================================================
   INPUT AREA
   ============================================================ */
.input-area {
  flex-shrink: 0;
  padding: 0 24px 16px;
}

.input-container {
  max-width: 768px;
  margin: 0 auto;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 0;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-lg);
  padding: 8px 12px 8px 8px;
  transition: border-color var(--transition);
}
.input-wrapper:focus-within {
  border-color: #5a5a5a;
}

.input-collection {
  appearance: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  margin-right: 4px;
  transition: border-color var(--transition);
}
.input-collection:hover {
  border-color: var(--border-light);
}
.input-collection:focus {
  outline: none;
  border-color: #5a5a5a;
}

#chat-input {
  flex: 1;
  border: none;
  background: transparent;
  resize: none;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-primary);
  padding: 6px 8px;
  max-height: 200px;
  overflow-y: auto;
}
#chat-input:focus {
  outline: none;
}
#chat-input::placeholder {
  color: var(--text-faint);
}

#chat-input::-webkit-scrollbar {
  width: 4px;
}
#chat-input::-webkit-scrollbar-thumb {
  background: #444;
  border-radius: 2px;
}

.send-btn {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--send-bg);
  color: var(--send-color);
  transition: background var(--transition), opacity var(--transition);
  flex-shrink: 0;
}
.send-btn:disabled {
  background: var(--send-disabled);
  color: #999;
  cursor: default;
  opacity: 0.5;
}
.send-btn:not(:disabled):hover {
  background: #e0e0e0;
}

.disclaimer {
  text-align: center;
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 8px;
}

/* ============================================================
   DOCUMENTS VIEW
   ============================================================ */
.docs-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px;
  padding: 24px;
  flex: 1;
  overflow-y: auto;
  align-content: start;
}

.card {
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

/* Drop zone */
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  color: var(--text-muted);
  text-align: center;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--border-light);
  background: rgba(255,255,255,0.02);
}
.drop-zone svg {
  margin-bottom: 12px;
  color: var(--text-faint);
}
.drop-zone p {
  font-size: 14px;
  margin-bottom: 4px;
}
.drop-hint {
  font-size: 12px;
  color: var(--text-faint);
}

.upload-controls {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.select-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 13px;
}
.select-input:focus {
  outline: none;
  border-color: var(--border-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition), opacity var(--transition);
  white-space: nowrap;
}
.btn.primary {
  background: var(--send-bg);
  color: var(--send-color);
}
.btn.primary:hover {
  background: #e0e0e0;
}
.btn.danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.btn.danger:hover {
  background: var(--danger);
  color: #fff;
}

.upload-status {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
  white-space: pre-wrap;
}
.upload-status.success { color: #4ade80; }
.upload-status.error { color: var(--danger); }

/* Upload progress bar */
.upload-progress {
  margin-top: 16px;
  display: none;
}
.upload-progress.active {
  display: block;
}
.upload-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.upload-progress-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}
.upload-progress-pct {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.upload-progress-track {
  width: 100%;
  height: 6px;
  background: var(--surface);
  border-radius: 3px;
  overflow: hidden;
}
.upload-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #7c3aed, #a78bfa);
  border-radius: 3px;
  width: 0%;
  transition: width 0.3s ease;
}
.upload-progress-bar.processing {
  width: 100%;
  background: linear-gradient(90deg, #7c3aed 0%, #a78bfa 50%, #7c3aed 100%);
  background-size: 200% 100%;
  animation: progressPulse 1.5s ease-in-out infinite;
}
@keyframes progressPulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.upload-progress-files {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.upload-file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  background: var(--surface);
}
.upload-file-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.upload-file-icon.pending { color: var(--text-faint); }
.upload-file-icon.uploading { color: #a78bfa; }
.upload-file-icon.processing { color: #eab308; }
.upload-file-icon.done { color: #22c55e; }
.upload-file-icon.error { color: var(--danger); }
.upload-file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
}
.upload-file-status {
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
}
.upload-file-item.done .upload-file-status { color: #4ade80; }
.upload-file-item.error .upload-file-status { color: var(--danger); }

/* Document list */
.docs-browser-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.docs-browser-header h3 {
  flex: 1;
  margin-bottom: 0;
}
.docs-browser-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.docs-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.doc-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.doc-item:hover {
  background: var(--sidebar-hover);
}

.doc-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  flex-shrink: 0;
}

.doc-info {
  flex: 1;
  min-width: 0;
}
.doc-name {
  font-size: 14px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.doc-meta {
  font-size: 12px;
  color: var(--text-faint);
}

.doc-delete {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-faint);
  opacity: 0;
  transition: opacity var(--transition), color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.doc-item:hover .doc-delete {
  opacity: 1;
}
.doc-delete:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.empty-docs {
  padding: 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: 14px;
}

/* ============================================================
   COLLECTIONS VIEW
   ============================================================ */
.collections-content {
  padding: 24px;
  flex: 1;
  overflow-y: auto;
  max-width: 640px;
}

.collection-form-card {
  margin-bottom: 24px;
}

.collection-form {
  display: flex;
  gap: 8px;
}

.text-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  color: var(--text-primary);
  font-size: 14px;
}
.text-input:focus {
  outline: none;
  border-color: var(--border-light);
}
.text-input::placeholder {
  color: var(--text-faint);
}

.collection-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  transition: border-color var(--transition);
}
.collection-item:hover {
  border-color: var(--border-light);
}

.collection-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.collection-info {
  flex: 1;
  min-width: 0;
}
.collection-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}
.collection-stats {
  font-size: 12px;
  color: var(--text-muted);
}

.collection-delete {
  color: var(--text-faint);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.collection-delete:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

/* ============================================================
   AGENT SELECTOR (sidebar)
   ============================================================ */
.sidebar-agents {
  padding: 4px 8px 8px;
  flex-shrink: 0;
}

.agent-select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
}
.agent-select:focus {
  outline: none;
  border-color: var(--border-light);
}

/* ============================================================
   AGENTS VIEW
   ============================================================ */
.view-subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 6px;
  font-weight: 400;
}

.agents-content {
  padding: 24px;
  flex: 1;
  overflow-y: auto;
  max-width: 100%;
}

/* Intro steps */
.agents-intro {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.intro-step {
  flex: 1;
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.intro-step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #7c3aed;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.intro-step-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.intro-step-text strong {
  font-size: 13px;
  color: var(--text-primary);
}
.intro-step-text span {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Form card */
.agent-form-card {
  margin-bottom: 28px;
}

.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-header-row h3 {
  margin-bottom: 0;
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.btn-text:hover {
  color: var(--text-primary);
  background: var(--surface);
}

.agent-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.agent-form.collapsed {
  display: none;
}

/* Form sections */
.form-section {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.form-section:first-child {
  padding-top: 0;
}
.form-section:last-of-type {
  border-bottom: none;
  padding-bottom: 8px;
}

.form-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row-knowledge {
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  margin-bottom: 12px;
}
.form-group:last-child {
  margin-bottom: 0;
}
.form-group label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}
.label-optional {
  color: var(--text-faint);
  font-weight: 400;
  font-size: 12px;
}
.form-hint {
  font-size: 11px;
  color: var(--text-faint);
  line-height: 1.4;
}

.form-group-collections {
  flex: 2;
}

.form-group-settings {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.icon-input {
  max-width: 70px;
  text-align: center;
  font-size: 18px !important;
  flex: none !important;
}

.prompt-input {
  resize: vertical;
  min-height: 100px;
  line-height: 1.5;
}

.btn-create-agent {
  margin-top: 8px;
  padding: 10px 24px;
  font-size: 14px;
  align-self: flex-start;
}

/* Agent list section */
.agents-list-section {
  margin-top: 4px;
}

.agents-list-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
}

/* Agent cards */
.agent-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  transition: border-color var(--transition);
}
.agent-card:hover {
  border-color: var(--border-light);
}

.agent-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #7c3aed;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}

.agent-details {
  flex: 1;
  min-width: 0;
}
.agent-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}
.agent-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}
.agent-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.agent-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: var(--surface);
  border-radius: 12px;
  font-size: 11px;
  color: var(--text-muted);
}
.agent-tag svg {
  flex-shrink: 0;
}

.agent-actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
}

.agent-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.agent-action-btn:hover {
  background: var(--surface);
  color: var(--text-primary);
}
.agent-action-btn.chat-btn:hover {
  background: rgba(124, 58, 237, 0.15);
  color: #a78bfa;
}
.agent-action-btn.del-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* Empty agents state */
.agents-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
  text-align: center;
}
.agents-empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--text-faint);
}
.agents-empty-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.agents-empty-desc {
  font-size: 13px;
  color: var(--text-faint);
  max-width: 300px;
}

/* ============================================================
   TOAST / NOTIFICATION
   ============================================================ */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  font-size: 14px;
  color: var(--text-primary);
  z-index: 1000;
  animation: slideUp 0.2s ease, fadeOut 0.3s ease 2.5s forwards;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.toast.error {
  border-color: var(--danger);
  color: var(--danger);
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes fadeOut {
  to { opacity: 0; transform: translateY(10px); }
}

/* ============================================================
   CUSTOM CONFIRM DIALOG
   ============================================================ */
.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  animation: fadeIn 0.15s ease;
}
.confirm-dialog {
  background: var(--sidebar-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  animation: scaleIn 0.15s ease;
}
.confirm-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.confirm-message {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 24px;
}
.confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.confirm-cancel {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.confirm-cancel:hover {
  background: var(--border);
  color: var(--text-primary);
}
.confirm-ok.danger {
  background: var(--danger);
  color: #fff;
}
.confirm-ok.danger:hover {
  background: #dc2626;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* ============================================================
   LOADING SPINNER
   ============================================================ */
.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px 20px;
  color: var(--text-faint);
  font-size: 14px;
}
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
  display: inline-block;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   INPUT VALIDATION ERROR
   ============================================================ */
.input-error {
  border-color: var(--danger) !important;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15) !important;
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}

/* ============================================================
   SESSION AGENT BADGE
   ============================================================ */
.session-agent-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.2);
  font-size: 11px;
  color: #a78bfa;
  flex-shrink: 0;
  margin-right: 4px;
  vertical-align: middle;
}

/* ============================================================
   AGENT PROMPT PREVIEW
   ============================================================ */
.agent-prompt-preview {
  font-size: 12px;
  color: var(--text-faint);
  margin-top: 6px;
  line-height: 1.4;
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* ============================================================
   AGENT EDIT / CANCEL BUTTONS
   ============================================================ */
.agent-action-btn.edit-btn:hover {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
}

.cancel-edit-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 10px 20px;
  font-size: 14px;
  margin-top: 8px;
  margin-left: 10px;
}
.cancel-edit-btn:hover {
  background: var(--surface);
  color: var(--text-primary);
  border-color: var(--border-light);
}

/* Agent form actions row */
.agent-form-actions {
  display: flex;
  align-items: center;
  margin-top: 8px;
}

/* ============================================================
   SIDEBAR SEARCH
   ============================================================ */
.sidebar-search {
  padding: 4px 12px 8px;
}
.search-input-wrap {
  position: relative;
}
.search-input-wrap svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  pointer-events: none;
  flex-shrink: 0;
}
.session-search-input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  background: var(--sidebar-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px 8px 32px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s;
}
.session-search-input::placeholder {
  color: var(--text-faint);
}
.session-search-input:focus {
  border-color: var(--border-light);
  background: var(--sidebar-active);
}

/* ============================================================
   MESSAGE FEEDBACK (THUMBS UP/DOWN)
   ============================================================ */
.message-feedback {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  padding-top: 4px;
}
.feedback-btn {
  background: none;
  border: none;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1;
  transition: all 0.15s;
  opacity: 0.5;
}
.feedback-btn:hover {
  opacity: 1;
  background: var(--surface-hover);
}
.feedback-btn.active {
  opacity: 1;
}
.feedback-btn.thumbs-up.active {
  color: #22c55e;
}
.feedback-btn.thumbs-down.active {
  color: var(--danger);
}

/* ============================================================
   STREAMING TEXT
   ============================================================ */
.streaming-text .cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--text-primary);
  margin-left: 2px;
  animation: blink 0.8s step-end infinite;
  vertical-align: text-bottom;
}
@keyframes blink {
  50% { opacity: 0; }
}

.error-text {
  color: var(--danger);
  font-style: italic;
}

/* ============================================================
   ANALYTICS DASHBOARD
   ============================================================ */
.analytics-content {
  padding: 24px 32px;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-y: auto;
  flex: 1;
}

/* Stats cards row */
.analytics-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Two-column row */
.analytics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Analytics card */
.analytics-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.analytics-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 16px 0;
}

/* Feedback stats */
.feedback-stats {
  display: flex;
  gap: 16px;
}
.feedback-stat {
  flex: 1;
  text-align: center;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--sidebar-hover);
}
.feedback-stat.positive {
  border-left: 3px solid #22c55e;
}
.feedback-stat.negative {
  border-left: 3px solid var(--danger);
}
.feedback-count {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}
.feedback-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Activity chart */
.activity-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 120px;
  padding-top: 8px;
}
.activity-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}
.activity-bar {
  width: 100%;
  max-width: 32px;
  background: linear-gradient(to top, #7c3aed, #a78bfa);
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  transition: height 0.3s ease;
}
.activity-label {
  font-size: 10px;
  color: var(--text-faint);
  margin-top: 6px;
  white-space: nowrap;
}

/* Top questions */
.top-questions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.top-question-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--sidebar-hover);
}
.top-question-rank {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.2);
  color: #a78bfa;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}
.top-question-text {
  flex: 1;
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.top-question-count {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  flex-shrink: 0;
}

/* Agent usage */
.agent-usage-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.agent-usage-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--sidebar-hover);
}
.agent-usage-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.2);
  color: #a78bfa;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.agent-usage-name {
  flex: 1;
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 500;
}
.agent-usage-count {
  font-size: 12px;
  color: var(--text-muted);
}

/* Recent feedback */
.recent-feedback-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.recent-feedback-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: var(--sidebar-hover);
}
.recent-feedback-icon {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}
.recent-feedback-content {
  flex: 1;
  min-width: 0;
}
.recent-feedback-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.recent-feedback-meta {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 4px;
}

/* ============================================================
   INLINE CITATIONS [1] [2] TOOLTIPS
   ============================================================ */
.citation-ref {
  display: inline;
  position: relative;
  color: #a78bfa;
  font-weight: 600;
  font-size: 0.85em;
  cursor: pointer;
  padding: 0 1px;
  border-radius: 3px;
  transition: background 0.15s;
  vertical-align: super;
  line-height: 1;
}
.citation-ref:hover,
.citation-ref:focus {
  background: rgba(124, 58, 237, 0.15);
}
.citation-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  max-width: 80vw;
  background: var(--sidebar-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}
.citation-ref:hover .citation-tooltip,
.citation-ref:focus .citation-tooltip {
  display: block;
}
.citation-tooltip strong {
  color: var(--text-primary);
  display: inline;
}
.citation-score {
  color: #a78bfa;
  font-weight: 600;
  margin-left: 4px;
}

/* ============================================================
   RETRIEVAL STATUS (search progress)
   ============================================================ */
.retrieval-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  color: var(--text-muted);
  font-size: 13px;
}
.spinner-sm {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: #a78bfa;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

/* ============================================================
   FOLLOW-UP SUGGESTIONS
   ============================================================ */
.followup-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  align-items: center;
}
.followup-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  flex-shrink: 0;
}
.followup-btn {
  background: var(--sidebar-hover);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  line-height: 1.4;
}
.followup-btn:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  border-color: #a78bfa;
}

/* ============================================================
   MESSAGE ACTIONS (feedback + retry row)
   ============================================================ */
.message-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  padding-top: 4px;
}
.retry-btn {
  background: none;
  border: none;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1;
  transition: all 0.15s;
  opacity: 0.5;
}
.retry-btn:hover {
  opacity: 1;
  background: var(--surface-hover);
  color: var(--text-primary);
}

/* ============================================================
   CONNECTION STATUS INDICATOR
   ============================================================ */
.connection-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  background: var(--text-faint);
  margin-right: 6px;
  flex-shrink: 0;
  transition: background 0.3s;
}
.connection-dot.online {
  background: #22c55e;
  box-shadow: 0 0 6px rgba(34, 197, 94, 0.4);
}
.connection-dot.offline {
  background: var(--danger);
  box-shadow: 0 0 6px rgba(239, 68, 68, 0.4);
}

/* ============================================================
   CODE BLOCK COPY BUTTON
   ============================================================ */
pre {
  position: relative;
}
.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 6px;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
  z-index: 5;
  line-height: 1;
}
pre:hover .code-copy-btn {
  opacity: 1;
}
.code-copy-btn:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}
.code-copy-btn.copied {
  color: #22c55e;
  border-color: #22c55e;
}

/* ============================================================
   EDIT MESSAGE
   ============================================================ */
.msg-edit-btn {
  position: absolute;
  top: 8px;
  right: -32px;
  background: none;
  border: none;
  padding: 4px;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
}
.message.user { position: relative; }
.message.user:hover .msg-edit-btn { opacity: 0.6; }
.msg-edit-btn:hover { opacity: 1 !important; background: var(--surface-hover); color: var(--text-primary); }

.edit-message-input {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 10px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  resize: vertical;
  min-height: 60px;
  outline: none;
}
.edit-message-input:focus {
  border-color: #a78bfa;
}
.edit-message-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  justify-content: flex-end;
}
.btn-sm {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  transition: all 0.15s;
}
.btn-sm:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}
.btn-sm.btn-primary {
  background: #a78bfa;
  color: #fff;
  border-color: #a78bfa;
}
.btn-sm.btn-primary:hover {
  background: #8b5cf6;
}

/* ============================================================
   EXPORT BUTTON
   ============================================================ */
.input-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}
.export-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 11px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s;
  white-space: nowrap;
}
.export-btn:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

/* ============================================================
   IMPROVED TOASTS (slide-in animation)
   ============================================================ */
.toast {
  animation: toastSlideIn 0.3s ease-out;
}
.toast.fade-out {
  animation: toastFadeOut 0.3s ease-out forwards;
}
@keyframes toastSlideIn {
  from { transform: translateY(-12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes toastFadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ============================================================
   MARKDOWN TABLE STYLING
   ============================================================ */
.message-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13px;
  overflow-x: auto;
  display: block;
}
.message-content thead th {
  background: var(--sidebar-bg);
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-light);
  white-space: nowrap;
}
.message-content tbody td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}
.message-content tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}
.message-content tbody tr:hover {
  background: rgba(124, 58, 237, 0.05);
}

/* ============================================================
   SKELETON LOADING
   ============================================================ */
.skeleton-loading {
  display: flex;
  gap: 12px;
  padding: 16px 0;
}
.skeleton-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface);
}
.skeleton-lines {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.skeleton-line {
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-hover) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}
.skeleton-line:nth-child(1) { width: 80%; }
.skeleton-line:nth-child(2) { width: 60%; }
.skeleton-line:nth-child(3) { width: 40%; }

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .agents-intro {
    flex-direction: column;
  }
  .form-row-knowledge {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    margin-left: 0 !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

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

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

  .input-area {
    padding: 0 12px 12px;
  }

  .analytics-content {
    padding: 16px;
  }
  .analytics-row {
    grid-template-columns: 1fr;
  }
  .analytics-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .messages {
    padding: 16px 12px;
  }
  .message {
    gap: 10px;
  }
}

/* ============================================================
   Login Screen
   ============================================================ */

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--main-bg);
}

.login-card {
  width: 100%;
  max-width: 380px;
  padding: 48px 32px;
  text-align: center;
}

.login-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--surface);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}

.login-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition);
}

.login-input:focus {
  border-color: var(--text-muted);
}

.login-btn {
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.login-error {
  margin-top: 12px;
  font-size: 13px;
  color: var(--danger);
}

.logout-btn {
  color: var(--text-muted) !important;
  margin-top: 4px;
}
.logout-btn:hover {
  color: var(--danger) !important;
}