/**
 * CHANDRA AI — ChatGPT-Style Conversational Interface Design System
 * Company: CHANDRA INNOVATE
 * Theme: Pure White (#ffffff), Deep Navy (#0a192f), Chandra Green (#218141), Chandra Orange (#f18a19)
 */

:root {
  --cai-font: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --cai-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;

  /* Light Theme Palette */
  --cai-bg: #ffffff;
  --cai-bg-secondary: #f8fafc;
  --cai-bg-tertiary: #f1f5f9;
  --cai-sidebar-bg: #f8fafc;
  --cai-sidebar-border: #e2e8f0;
  --cai-card-border: #e2e8f0;

  --cai-text-primary: #0f172a;
  --cai-text-secondary: #475569;
  --cai-text-muted: #64748b;

  --cai-navy: #0a192f;
  --cai-green: #218141;
  --cai-green-light: #ecfdf5;
  --cai-green-hover: #1b6a35;
  --cai-orange: #f18a19;
  --cai-orange-light: #fff7ed;
  --cai-orange-hover: #d97706;

  --cai-bubble-user: #f1f5f9;
  --cai-bubble-ai: #ffffff;
  --cai-code-bg: #0a192f;
  --cai-code-text: #f8fafc;

  --cai-shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --cai-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --cai-shadow-lg: 0 10px 25px rgba(0,0,0,0.12);

  --cai-radius-sm: 6px;
  --cai-radius-md: 10px;
  --cai-radius-lg: 16px;
  --cai-radius-full: 9999px;

  --cai-sidebar-width: 280px;
}

/* Dark Theme Palette */
[data-theme="dark"] {
  --cai-bg: #0b1120;
  --cai-bg-secondary: #0f172a;
  --cai-bg-tertiary: #1e293b;
  --cai-sidebar-bg: #0a101f;
  --cai-sidebar-border: #1e293b;
  --cai-card-border: #1e293b;

  --cai-text-primary: #f8fafc;
  --cai-text-secondary: #cbd5e1;
  --cai-text-muted: #94a3b8;

  --cai-bubble-user: #1e293b;
  --cai-bubble-ai: #0f172a;
  --cai-code-bg: #020617;
  --cai-code-text: #e2e8f0;

  --cai-shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --cai-shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --cai-shadow-lg: 0 10px 25px rgba(0,0,0,0.6);
}

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

html, body {
  height: 100%;
  font-family: var(--cai-font);
  background-color: var(--cai-bg);
  color: var(--cai-text-primary);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* Base App Layout */
.cai-layout {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  position: relative;
}

/* ========================================================
   1. CONVERSATION SIDEBAR
   ======================================================== */
.cai-sidebar {
  width: var(--cai-sidebar-width);
  min-width: var(--cai-sidebar-width);
  height: 100%;
  background: var(--cai-sidebar-bg);
  border-right: 1px solid var(--cai-sidebar-border);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), margin-left 0.25s ease;
  z-index: 50;
  user-select: none;
}

.cai-sidebar.collapsed {
  margin-left: calc(-1 * var(--cai-sidebar-width));
}

.cai-sb-header {
  padding: 16px 18px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cai-sb-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.cai-sb-brand img {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.cai-sb-brand-info b {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: var(--cai-text-primary);
  display: block;
}

.cai-sb-brand-info small {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--cai-green);
  display: block;
}

.cai-icon-btn {
  background: transparent;
  border: none;
  color: var(--cai-text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--cai-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-size: 16px;
}

.cai-icon-btn:hover {
  background: var(--cai-bg-tertiary);
  color: var(--cai-text-primary);
}

.cai-sb-close-btn {
  display: none;
}

/* New Chat Button */
.cai-sb-action-wrap {
  padding: 8px 16px 12px;
}

.cai-new-chat-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--cai-bg);
  border: 1px solid var(--cai-sidebar-border);
  border-radius: var(--cai-radius-md);
  color: var(--cai-text-primary);
  font-weight: 600;
  font-size: 13.5px;
  cursor: pointer;
  box-shadow: var(--cai-shadow-sm);
  transition: all 0.15s ease;
}

.cai-new-chat-btn:hover {
  background: var(--cai-bg-tertiary);
  border-color: #cbd5e1;
  color: var(--cai-navy);
}

.cai-new-chat-btn .icon {
  font-size: 16px;
  color: var(--cai-green);
}

/* Search Bar */
.cai-sb-search-wrap {
  padding: 0 16px 10px;
}

.cai-sb-search {
  width: 100%;
  padding: 7px 12px;
  background: var(--cai-bg);
  border: 1px solid var(--cai-sidebar-border);
  border-radius: var(--cai-radius-sm);
  font-size: 12.5px;
  color: var(--cai-text-primary);
  outline: none;
  transition: border-color 0.15s;
}

.cai-sb-search:focus {
  border-color: var(--cai-green);
}

/* Conversation List */
.cai-convo-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.cai-convo-group-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--cai-text-muted);
  padding: 12px 10px 4px;
}

.cai-convo-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-radius: var(--cai-radius-md);
  font-size: 13px;
  color: var(--cai-text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  position: relative;
  text-decoration: none;
}

.cai-convo-item:hover {
  background: var(--cai-bg-tertiary);
  color: var(--cai-text-primary);
}

.cai-convo-item.active {
  background: var(--cai-bg-tertiary);
  color: var(--cai-navy);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--cai-green);
}

.cai-convo-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.cai-convo-actions {
  display: none;
  align-items: center;
  gap: 4px;
}

.cai-convo-item:hover .cai-convo-actions,
.cai-convo-item.active .cai-convo-actions {
  display: flex;
}

.cai-convo-action-btn {
  background: transparent;
  border: none;
  color: var(--cai-text-muted);
  font-size: 11px;
  padding: 3px 5px;
  border-radius: 4px;
  cursor: pointer;
}

.cai-convo-action-btn:hover {
  background: var(--cai-bg);
  color: var(--cai-text-primary);
}

/* Sidebar Footer */
.cai-sb-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--cai-sidebar-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cai-sb-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cai-sb-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--cai-text-secondary);
  text-decoration: none;
  padding: 5px 8px;
  border-radius: var(--cai-radius-sm);
  transition: background 0.15s, color 0.15s;
}

.cai-sb-link:hover {
  background: var(--cai-bg-tertiary);
  color: var(--cai-text-primary);
}

.cai-sb-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 6px;
  border-top: 1px dashed var(--cai-sidebar-border);
}

.cai-sb-control-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--cai-sidebar-border);
  padding: 6px 10px;
  border-radius: var(--cai-radius-sm);
  font-size: 12px;
  color: var(--cai-text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.cai-sb-control-btn:hover {
  background: var(--cai-bg-tertiary);
  color: var(--cai-text-primary);
}

.cai-theme-btn {
  padding: 6px 10px;
}

/* ========================================================
   2. MAIN CHAT AREA
   ======================================================== */
.cai-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  background: var(--cai-bg);
  overflow: hidden;
}

/* Top Navigation Bar */
.cai-topbar {
  height: 56px;
  min-height: 56px;
  border-bottom: 1px solid var(--cai-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--cai-bg);
  z-index: 20;
}

.cai-topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.cai-chat-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--cai-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}

.cai-topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Model Selector Dropdown */
.cai-model-select-wrap {
  position: relative;
}

.cai-model-select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--cai-bg-secondary) url('data:image/svg+xml;utf8,<svg fill="%23475569" height="18" viewBox="0 0 24 24" width="18" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>') no-repeat right 8px center;
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-full);
  padding: 6px 28px 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--cai-text-primary);
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.cai-model-select:hover,
.cai-model-select:focus {
  border-color: var(--cai-green);
  box-shadow: 0 0 0 2px rgba(33, 129, 65, 0.12);
}

/* Chat Stream */
.cai-chat-stream {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cai-stream-inner {
  width: 100%;
  max-width: 820px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* Welcome Hero (For New / Empty Chats) */
.cai-welcome-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px 20px;
  margin: auto 0;
  width: 100%;
  max-width: 720px;
}

.cai-welcome-logo {
  height: 48px;
  width: auto;
  margin-bottom: 16px;
}

.cai-welcome-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--cai-text-primary);
  margin-bottom: 6px;
}

.cai-welcome-subtitle {
  font-size: 14.5px;
  color: var(--cai-text-secondary);
  margin-bottom: 28px;
}

.cai-prompt-starters {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
}

.cai-starter-chip {
  background: var(--cai-bg-secondary);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-md);
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.cai-starter-chip:hover {
  background: var(--cai-bg);
  border-color: var(--cai-green);
  box-shadow: var(--cai-shadow-sm);
  transform: translateY(-1px);
}

.cai-starter-chip b {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--cai-text-primary);
  margin-bottom: 3px;
}

.cai-starter-chip span {
  font-size: 12px;
  color: var(--cai-text-muted);
  line-height: 1.4;
  display: block;
}

/* Chat Message Bubbles */
.cai-msg-row {
  display: flex;
  width: 100%;
  gap: 14px;
}

.cai-msg-row.user {
  justify-content: flex-end;
}

.cai-msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--cai-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.cai-msg-avatar.ai {
  background: var(--cai-navy);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.1);
}

.cai-msg-content-wrap {
  max-width: 85%;
  display: flex;
  flex-direction: column;
}

.cai-msg-bubble {
  padding: 14px 18px;
  border-radius: var(--cai-radius-lg);
  font-size: 14.5px;
  line-height: 1.6;
  position: relative;
}

.cai-msg-row.user .cai-msg-bubble {
  background: var(--cai-bubble-user);
  color: var(--cai-text-primary);
  border-bottom-right-radius: 4px;
}

.cai-msg-row.assistant .cai-msg-bubble {
  background: var(--cai-bubble-ai);
  color: var(--cai-text-primary);
  border: 1px solid var(--cai-card-border);
  border-bottom-left-radius: 4px;
  box-shadow: var(--cai-shadow-sm);
}

.cai-msg-bubble p {
  margin-bottom: 10px;
}

.cai-msg-bubble p:last-child {
  margin-bottom: 0;
}

.cai-msg-bubble h1, .cai-msg-bubble h2, .cai-msg-bubble h3 {
  margin: 14px 0 6px;
  color: var(--cai-text-primary);
  font-weight: 700;
}

.cai-msg-bubble h3 {
  font-size: 15px;
}

.cai-msg-bubble ul, .cai-msg-bubble ol {
  padding-left: 20px;
  margin-bottom: 10px;
}

.cai-msg-bubble li {
  margin-bottom: 4px;
}

/* Code Blocks in Messages */
.cai-code-block {
  background: var(--cai-code-bg);
  border-radius: var(--cai-radius-md);
  margin: 12px 0;
  overflow: hidden;
  box-shadow: var(--cai-shadow-sm);
}

.cai-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.cai-code-lang {
  font-size: 11.5px;
  font-family: var(--cai-mono);
  font-weight: 600;
  color: #94a3b8;
  text-transform: uppercase;
}

.cai-code-copy-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 11.5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

.cai-code-copy-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.cai-code-block pre {
  padding: 14px 16px;
  margin: 0;
  overflow-x: auto;
  font-family: var(--cai-mono);
  font-size: 12.8px;
  color: var(--cai-code-text);
  line-height: 1.5;
}

/* Artifact Download Cards */
.cai-artifact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  margin-top: 10px;
  background: var(--cai-bg-secondary);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-md);
  font-size: 13px;
}

.cai-artifact-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cai-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--cai-green);
  color: #ffffff;
  padding: 5px 12px;
  border-radius: var(--cai-radius-full);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s;
}

.cai-download-btn:hover {
  background: var(--cai-green-hover);
}

/* SEO Report Box */
.cai-seo-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 10px 0;
  flex-wrap: wrap;
}

.cai-seo-pill {
  padding: 4px 10px;
  border-radius: var(--cai-radius-full);
  font-size: 12px;
  font-weight: 700;
}

.cai-seo-pill.good {
  background: #ecfdf5;
  color: #15803d;
}

.cai-seo-pill.warn {
  background: #fffbeb;
  color: #b45309;
}

/* Message Action Toolbar (Read aloud, Copy, Details) */
.cai-msg-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding-left: 4px;
}

.cai-msg-tool-btn {
  background: transparent;
  border: none;
  color: var(--cai-text-muted);
  font-size: 12px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s;
}

.cai-msg-tool-btn:hover {
  color: var(--cai-text-primary);
  background: var(--cai-bg-tertiary);
}

/* Subtle Task Progress Banner */
.cai-progress-banner {
  position: absolute;
  bottom: 96px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 600px;
  background: var(--cai-bg);
  border: 1px solid var(--cai-card-border);
  box-shadow: var(--cai-shadow-md);
  border-radius: var(--cai-radius-full);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 30;
  animation: fadeIn 0.2s ease;
}

.cai-progress-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--cai-card-border);
  border-top-color: var(--cai-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

.cai-progress-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--cai-text-primary);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cai-stop-btn {
  background: #fee2e2;
  color: #b91c1c;
  border: none;
  padding: 4px 10px;
  border-radius: var(--cai-radius-full);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.cai-stop-btn:hover {
  background: #fecaca;
}

/* Attachment Preview Drawer */
.cai-attach-previews {
  position: absolute;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 820px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 6px 4px;
  z-index: 25;
}

.cai-attach-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--cai-bg-secondary);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-full);
  padding: 4px 12px;
  font-size: 12px;
  color: var(--cai-text-primary);
  box-shadow: var(--cai-shadow-sm);
}

.cai-attach-remove {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--cai-text-muted);
  font-weight: 700;
  font-size: 12px;
}

/* ========================================================
   3. CENTERED COMPOSER (STICKY BOTTOM)
   ======================================================== */
.cai-composer-wrap {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0) 0%, var(--cai-bg) 35%);
  padding: 12px 20px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 20;
}

[data-theme="dark"] .cai-composer-wrap {
  background: linear-gradient(180deg, rgba(11,17,32,0) 0%, var(--cai-bg) 35%);
}

.cai-composer-box {
  width: 100%;
  max-width: 820px;
  background: var(--cai-bg);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-lg);
  box-shadow: var(--cai-shadow-md);
  padding: 8px 12px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.cai-composer-box:focus-within {
  border-color: var(--cai-green);
  box-shadow: 0 0 0 3px rgba(33, 129, 65, 0.12), var(--cai-shadow-md);
}

.cai-comp-btn {
  background: transparent;
  border: none;
  color: var(--cai-text-muted);
  width: 36px;
  height: 36px;
  border-radius: var(--cai-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.cai-comp-btn:hover {
  background: var(--cai-bg-tertiary);
  color: var(--cai-text-primary);
}

.cai-comp-btn.recording {
  background: #fee2e2;
  color: #dc2626;
  animation: pulse 1s infinite;
}

.cai-composer-textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--cai-font);
  font-size: 14.5px;
  color: var(--cai-text-primary);
  line-height: 1.45;
  resize: none;
  max-height: 180px;
  padding: 8px 4px;
}

.cai-composer-textarea::placeholder {
  color: var(--cai-text-muted);
}

.cai-comp-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.cai-send-btn {
  background: var(--cai-green);
  color: #ffffff;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: var(--cai-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  box-shadow: var(--cai-shadow-sm);
}

.cai-send-btn:hover {
  background: var(--cai-green-hover);
  transform: scale(1.04);
}

.cai-send-btn:disabled {
  background: var(--cai-card-border);
  color: var(--cai-text-muted);
  cursor: not-allowed;
  transform: none;
}

.cai-composer-footer {
  font-size: 11px;
  color: var(--cai-text-muted);
  margin-top: 6px;
  text-align: center;
}

/* ========================================================
   4. SETTINGS & MODEL MODAL
   ======================================================== */
.cai-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 25, 47, 0.45);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.15s ease;
}

.cai-modal {
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  background: var(--cai-bg);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-lg);
  box-shadow: var(--cai-shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cai-modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--cai-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cai-modal-header h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--cai-text-primary);
}

.cai-modal-nav {
  display: flex;
  border-bottom: 1px solid var(--cai-card-border);
  background: var(--cai-bg-secondary);
  padding: 0 16px;
  gap: 8px;
}

.cai-modal-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cai-text-secondary);
  cursor: pointer;
}

.cai-modal-tab.active {
  color: var(--cai-green);
  border-bottom-color: var(--cai-green);
}

.cai-modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.cai-setting-row {
  margin-bottom: 16px;
}

.cai-setting-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--cai-text-primary);
  margin-bottom: 4px;
}

.cai-setting-row small {
  display: block;
  font-size: 12px;
  color: var(--cai-text-muted);
  margin-bottom: 8px;
}

.cai-setting-row input,
.cai-setting-row textarea,
.cai-setting-row select {
  width: 100%;
  padding: 8px 12px;
  background: var(--cai-bg);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-sm);
  font-size: 13px;
  color: var(--cai-text-primary);
  outline: none;
}

.cai-diag-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.cai-diag-card {
  background: var(--cai-bg-secondary);
  border: 1px solid var(--cai-card-border);
  border-radius: var(--cai-radius-md);
  padding: 12px 14px;
}

.cai-diag-card small {
  font-size: 11px;
  color: var(--cai-text-muted);
  text-transform: uppercase;
  font-weight: 700;
  display: block;
}

.cai-diag-card b {
  font-size: 14px;
  color: var(--cai-text-primary);
  display: block;
  margin-top: 4px;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .cai-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 60;
    box-shadow: var(--cai-shadow-lg);
  }

  .cai-sidebar.mobile-closed {
    transform: translateX(-100%);
    margin-left: 0;
  }

  .cai-sb-close-btn {
    display: flex;
  }

  .cai-prompt-starters {
    grid-template-columns: 1fr;
  }

  .cai-diag-grid {
    grid-template-columns: 1fr;
  }

  .cai-chat-title {
    max-width: 180px;
  }
}