/* Kimi-style Chat Interface */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f9f9f9;
  --bg-hover: #f5f5f5;
  --bg-active: #e0e7ff;
  --border-color: #e5e5e5;
  --border-light: #f0f0f0;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --accent-color: #4f46e5;
  --accent-hover: #4338ca;
  --accent-light: #eef2ff;
  --error-color: #dc2626;
  --success-color: #16a34a;
  --warning-color: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --sidebar-width: 260px;
  --header-height: 60px;
  --transition: all 0.2s ease;
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  
  /* Font size variables - default normal */
  --font-size-base: 16px;
  --font-size-code: 14px;
}

/* Font size classes */
.font-size-small {
  --font-size-base: 14px;
  --font-size-code: 12px;
}

.font-size-normal {
  --font-size-base: 16px;
  --font-size-code: 14px;
}

.font-size-large {
  --font-size-base: 18px;
  --font-size-code: 16px;
}

.font-size-xlarge {
  --font-size-base: 20px;
  --font-size-code: 17px;
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #d1d5db;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #9ca3af;
}

/* Utility */
.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.gap-2 {
  gap: 8px;
}

.gap-3 {
  gap: 12px;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.text-sm {
  font-size: 13px;
}

.text-xs {
  font-size: 12px;
}

.text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* App Layout */
.app-container {
  display: flex;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform 0.3s ease, width 0.3s ease;
}

.sidebar.collapsed {
  transform: translateX(-100%);
  width: 0;
  overflow: hidden;
}

.sidebar-backdrop {
  display: none;
}

.sidebar-header {
  padding: 12px;
  border-bottom: 1px solid var(--border-light);
}

.new-chat-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.new-chat-btn:hover {
  background: var(--bg-hover);
  border-color: #d1d5db;
}

.new-chat-btn svg {
  width: 16px;
  height: 16px;
}

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

.sidebar-section {
  margin-bottom: 16px;
}

.sidebar-section-title {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.conversation-group {
  margin-bottom: 10px;
}

.conversation-group:last-child {
  margin-bottom: 0;
}

.conversation-group-title {
  padding: 6px 12px 5px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
}

.conversation-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  margin: 0;
  min-height: 36px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.conversation-item:hover {
  background: var(--bg-hover);
}

.conversation-item.active {
  background: var(--bg-active);
}

.conversation-item.active .conversation-title {
  color: var(--accent-color);
  font-weight: 600;
}

.conversation-title {
  flex: 1;
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-left: 4px;
  min-width: 0;
}

.conversation-streaming-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-color);
  box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.45);
  animation: conversation-pulse 1.4s infinite;
  flex-shrink: 0;
}

@keyframes conversation-pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.45);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 8px rgba(79, 70, 229, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0);
  }
}

.conversation-actions {
  display: flex;
  gap: 4px;
  width: 52px;
  justify-content: flex-end;
  opacity: 0;
  pointer-events: none;
  flex-shrink: 0;
}

.conversation-item:hover .conversation-actions,
.conversation-item.active .conversation-actions {
  opacity: 1;
  pointer-events: auto;
}

.conversation-actions button {
  padding: 4px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-tertiary);
  transition: var(--transition);
}

.conversation-actions button:hover {
  background: rgba(0,0,0,0.05);
  color: var(--text-primary);
}

.conversation-actions button svg {
  width: 14px;
  height: 14px;
}

.sidebar-footer {
  padding: 12px 12px calc(12px + var(--safe-area-bottom));
  border-top: 1px solid var(--border-light);
  position: relative;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.user-menu:hover {
  background: var(--bg-hover);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--accent-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-email {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-role {
  font-size: 11px;
  color: var(--text-tertiary);
}

.user-menu svg {
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  bottom: 100%;
  left: 12px;
  right: 12px;
  margin-bottom: 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 100;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-primary);
  transition: var(--transition);
}

.dropdown-item:hover {
  background: var(--bg-hover);
}

.dropdown-item.danger {
  color: var(--error-color);
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Header */
.header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--safe-area-top) 20px 0;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-primary);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.header-btn:hover {
  background: var(--bg-hover);
  border-color: #d1d5db;
}

.header-btn svg {
  width: 14px;
  height: 14px;
}

/* Content Area */
.content-area {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* Welcome Screen */
.welcome-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  min-height: 100%;
}

.welcome-logo {
  margin-bottom: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.welcome-logo svg {
  width: 180px;
  height: auto;
}

.welcome-input-container {
  width: 100%;
  max-width: 720px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: 16px 20px;
  transition: var(--transition);
}

.welcome-input-container:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 4px 20px rgba(79, 70, 229, 0.1);
}

.welcome-textarea {
  width: 100%;
  min-height: 60px;
  max-height: 200px;
  border: none;
  outline: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: transparent;
  resize: none;
  font-family: inherit;
}

.welcome-textarea::placeholder {
  color: var(--text-tertiary);
}

.welcome-input-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 6px;
}

.input-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-tertiary);
  transition: var(--transition);
}

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

.tool-btn svg {
  width: 18px;
  height: 18px;
}

/* Feature button (search toggle) - Deepseek style */
.feature-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.feature-btn:hover {
  background: var(--bg-hover);
  border-color: #d1d5db;
}

.feature-btn.active {
  background: var(--accent-light);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.feature-btn svg {
  width: 14px;
  height: 14px;
}

.welcome-provider-select {
  min-width: 140px;
  max-width: 160px;
}

.header-provider-button {
  width: auto;
  min-width: 128px;
  max-width: 156px;
  flex: 0 1 128px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.provider-select-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

button.header-provider-button {
  padding: 6px 10px;
  font-size: 13px;
}

.provider-type-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
}

.conversation-delete-btn {
  margin-left: auto;
}


.send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: white;
  transition: var(--transition);
}

.send-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

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

.send-btn svg {
  width: 18px;
  height: 18px;
}

/* Quick Actions */
.quick-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.quick-action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.quick-action-btn:hover {
  background: var(--bg-hover);
  border-color: #d1d5db;
}

.quick-action-btn svg {
  width: 14px;
  height: 14px;
}

/* Chat Screen */
.chat-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 0 24px;
}

.messages-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  width: 100%;
}

/* Kimi-style Message Layout - Clean without bubble borders */
.message {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  max-width: 100%;
}

.messages-list .message:last-child {
  padding-bottom: 8px;
}

/* User messages align right */
.message.user {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.message-avatar.user {
  background: var(--accent-color);
  color: white;
}

.message-avatar.assistant {
  background: transparent;
  color: #6d28d9;
}

.message-avatar svg {
  width: 18px;
  height: 18px;
}

/* Content wrapper takes full width */
.message-content-wrapper {
  flex: 1;
  min-width: 0;
  max-width: calc(100% - 48px);
}

/* User content aligns right */
.message.user .message-content-wrapper {
  text-align: right;
}

.message.user .message-body {
  display: inline-block;
  text-align: left;
  background: #f3f4f6;
  padding: 12px 16px;
  border-radius: 16px;
  border-bottom-right-radius: 4px;
}

/* Assistant content no bubble */
.message.assistant .message-body {
  width: 100%;
}

/* Message body styles */
.message-body.markdown-content {
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--text-primary);
}

.message-body.markdown-content > *:first-child {
  margin-top: 0;
}

.message-body.markdown-content > *:last-child {
  margin-bottom: 0;
}

.message-body.markdown-content p {
  margin: 0 0 12px 0;
}

.message-body.markdown-content p:last-child {
  margin-bottom: 0;
}

/* Inline code - simple style without border/background */
.message-body.markdown-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-primary);
}

/* Code block styles with header and copy button */
.message-body.markdown-content pre {
  background: #f6f8fa;
  border: 1px solid #e5e7eb;
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: var(--font-size-code);
  line-height: 1.6;
  margin: 16px 0;
  position: relative;
  padding-top: 36px; /* Match header height exactly */
}

/* Code block header - floating style like Kimi */
.code-block-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px 6px 16px;
  background: transparent;
  font-size: 12px;
  color: var(--text-secondary);
  z-index: 1;
  height: 36px;
  box-sizing: border-box;
}

.code-lang {
  text-transform: lowercase;
  font-weight: 500;
  color: var(--text-tertiary);
  margin-left: 0;
  padding-left: 0;
}

.code-copy-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid #e5e7eb;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.code-copy-btn:hover {
  background: #fff;
  color: var(--text-primary);
  border-color: #d1d5db;
}

.code-copy-btn:disabled,
.code-copy-btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: default;
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-tertiary);
  border-color: #e5e7eb;
}

.code-copy-btn svg {
  width: 14px;
  height: 14px;
}

/* Code inside code blocks - reset inline styles */
.message-body.markdown-content pre code {
  display: block;
  padding: 2px 16px 8px 0;
  margin: 0;
  overflow-x: auto;
  background: transparent;
  font-size: var(--font-size-code);
  border-radius: 0;
  white-space: pre;
  line-height: 1.6;
}

/* Remove extra bottom space from pre */
.message-body.markdown-content pre {
  text-align: left;
  padding-bottom: 0;
  margin-bottom: 16px;
}

/* Target the last child elements to remove trailing space */
.message-body.markdown-content pre code > *:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

/* Inline code wrapper (for short single-line codes that marked wrapped in pre) */
.message-body.markdown-content pre.inline-code-wrapper {
  display: inline;
  background: transparent;
  border: none;
  margin: 0;
  padding: 0;
  font-size: inherit;
}

.message-body.markdown-content pre.inline-code-wrapper code {
  display: inline;
  padding: 2px 6px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
  font-size: 0.9em;
}

.message-body.markdown-content ul,
.message-body.markdown-content ol {
  margin: 12px 0;
  padding-left: 24px;
}

.message-body.markdown-content li {
  margin: 4px 0;
}

/* Attachments, Sources, Actions */
.message-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.message.user .message-attachments {
  justify-content: flex-end;
}

.message-attachment {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-md);
  font-size: 12px;
  color: var(--text-secondary);
}

.message-attachment-image {
  display: block;
  padding: 0;
  background: transparent;
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: min(320px, 100%);
}

.message-attachment img {
  display: block;
  width: auto;
  max-width: min(320px, 100%);
  max-height: 220px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.message-sources {
  margin-top: 8px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-md);
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
}

.message.user .message-sources {
  background: rgba(255, 255, 255, 0.5);
}

.message-sources-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.message-source-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  font-size: 11px;
  min-width: 0;
}

.message-source-item a {
  color: var(--accent-color);
  text-decoration: none;
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-source-item a:hover {
  text-decoration: underline;
}

.message-sources-hidden {
  margin-top: 2px;
}

.message-sources-toggle {
  margin-top: 6px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--accent-color);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.message-sources-toggle:hover {
  text-decoration: underline;
}

.message-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.message.user .message-actions {
  justify-content: flex-end;
}

.message-action-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: var(--transition);
}

.message-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.message-action-btn svg {
  width: 14px;
  height: 14px;
}

/* Composer */
.composer-container {
  padding: 4px 20px calc(14px + var(--safe-area-bottom));
  background: var(--bg-primary);
  border-top: 1px solid var(--border-light);
}

.composer {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 16px 20px;
  transition: var(--transition);
}

.composer:focus-within {
  border-color: var(--accent-color);
  box-shadow: 0 4px 20px rgba(79, 70, 229, 0.1);
}

.composer textarea {
  width: 100%;
  min-height: 24px;
  max-height: 200px;
  border: none;
  outline: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background: transparent;
  resize: none;
  font-family: inherit;
}

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

.composer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 6px;
}

.composer-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.composer-options {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toggle-option {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}

.toggle-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-color);
}

.model-select {
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-primary);
  cursor: pointer;
  outline: none;
}

.model-select:focus {
  border-color: var(--accent-color);
}

/* File Preview */
.file-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.file-preview-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 12px;
}

.file-preview-item img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.file-preview-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  flex-shrink: 0;
}

.file-preview-name {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-preview-remove {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  background: var(--error-color);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 14px;
}

/* Loading State */
.loading-dots {
  display: flex;
  gap: 4px;
  padding: 12px 0;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  background: var(--text-tertiary);
  border-radius: var(--radius-full);
  animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) {
  animation-delay: -0.32s;
}

.loading-dots span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes bounce {
  0%, 80%, 100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

/* Login Page */
.login-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: calc(20px + var(--safe-area-top)) calc(20px + var(--safe-area-right)) calc(20px + var(--safe-area-bottom)) calc(20px + var(--safe-area-left));
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 40px;
}

.login-logo {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.login-subtitle {
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  outline: none;
  transition: var(--transition);
}

.form-input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.login-btn {
  width: 100%;
  padding: 12px 24px;
  background: var(--accent-color);
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 8px;
}

.login-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.login-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.login-error {
  padding: 12px 16px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--error-color);
  margin-top: 16px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal {
  width: 100%;
  max-width: 480px;
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

.attach-filter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.attach-filter-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
}

.attach-filter-option:hover {
  border-color: var(--accent-color);
  background: var(--accent-light);
}

.attach-filter-option strong {
  font-size: 13px;
}

.attach-filter-option span {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-secondary {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

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

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

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

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

.btn-danger:hover {
  background: #b91c1c;
}

/* Settings Panel */
.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 400px;
  height: 100vh;
  height: 100dvh;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.settings-panel.open {
  transform: translateX(0);
}

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

.settings-title {
  font-size: 16px;
  font-weight: 600;
}

.settings-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-tertiary);
  -webkit-appearance: none;
  appearance: none;
  padding: 0;
  margin: 0;
}

.settings-close:hover {
  background: var(--bg-hover);
}

.settings-close svg {
  width: 20px;
  height: 20px;
  display: block;
  flex-shrink: 0;
}

.settings-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.settings-section {
  margin-bottom: 24px;
}

.settings-section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

.settings-item:last-child {
  border-bottom: none;
}

.settings-item-label {
  font-size: 14px;
  color: var(--text-primary);
}

.settings-item-desc {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* Provider Card */
.provider-card {
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
}

.provider-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.provider-name {
  font-size: 14px;
  font-weight: 600;
}

.provider-type {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--accent-light);
  color: var(--accent-color);
  border-radius: var(--radius-full);
}

.provider-url {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.provider-actions {
  display: flex;
  gap: 8px;
}

.provider-actions button {
  flex: 1;
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.provider-actions button:hover {
  background: var(--bg-hover);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--accent-color);
  min-width: 300px;
  animation: slideIn 0.3s ease;
}

.toast.error {
  border-left-color: var(--error-color);
}

.toast.success {
  border-left-color: var(--success-color);
}

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

/* Admin Badge */
.admin-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: var(--accent-light);
  color: var(--accent-color);
  font-size: 11px;
  font-weight: 500;
  border-radius: var(--radius-full);
}

/* Search Box */
.search-box {
  position: relative;
  margin-bottom: 8px;
}

.search-box input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 13px;
  background: var(--bg-primary);
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent-color);
}

.search-box svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(82vw, 320px);
    max-width: 320px;
    transform: translateX(-100%);
    z-index: 100;
    transition: transform 0.3s ease;
    box-shadow: 0 16px 48px rgba(15, 23, 42, 0.24);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar.collapsed {
    transform: translateX(-100%);
    width: min(82vw, 320px);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.28);
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }

  .sidebar-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
  }
  
  .menu-toggle {
    display: flex !important;
  }

  .header-title {
    display: none;
  }

  .message {
    gap: 0;
  }

  .message-avatar.assistant {
    display: none;
  }

  .message-content-wrapper {
    max-width: 100%;
  }

  .feature-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 999px;
    justify-content: center;
  }

  .feature-btn span {
    display: none;
  }

  .feature-btn svg {
    width: 16px;
    height: 16px;
  }

  .welcome-input-actions,
  .composer-toolbar {
    margin-top: 6px;
    padding-top: 4px;
  }

  .send-btn {
    width: 32px;
    height: 32px;
  }

  .send-btn svg {
    width: 16px;
    height: 16px;
  }
}

/* Utility for markdown content */
/* Markdown Content Styles */
.markdown-content {
  line-height: 1.7;
}

.markdown-content > *:first-child {
  margin-top: 0;
}

.markdown-content > *:last-child {
  margin-bottom: 0;
}

/* Headers */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  margin: 24px 0 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

.markdown-content h1 {
  font-size: 24px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 8px;
}

.markdown-content h2 {
  font-size: 20px;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 6px;
}

.markdown-content h3 {
  font-size: 18px;
}

.markdown-content h4 {
  font-size: 16px;
}

.markdown-content h5 {
  font-size: 14px;
}

.markdown-content h6 {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Paragraphs */
.markdown-content p {
  margin: 12px 0;
}

/* Links */
.markdown-content a {
  color: var(--accent-color);
  text-decoration: none;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.markdown-content a:hover {
  text-decoration: underline;
}

/* Lists */
.markdown-content ul,
.markdown-content ol {
  margin: 12px 0;
  padding-left: 24px;
}

.markdown-content ul {
  list-style-type: disc;
}

.markdown-content ol {
  list-style-type: decimal;
}

.markdown-content li {
  margin: 4px 0;
}

.markdown-content li > ul,
.markdown-content li > ol {
  margin: 4px 0;
}

/* Task Lists */
.markdown-content input[type="checkbox"] {
  margin-right: 8px;
  pointer-events: none;
}

/* Code */
.markdown-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: var(--font-size-code);
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-primary);
}

.markdown-content pre {
  background: #f6f8fa;
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  margin: 12px 0;
  border: 1px solid var(--border-color);
}

.markdown-content pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: var(--font-size-code);
  line-height: 1.5;
}

/* Code highlighting adjustments */
.markdown-content pre .hljs {
  background: transparent;
  padding: 0;
}

/* Blockquotes */
.markdown-content blockquote {
  margin: 16px 0;
  padding: 4px 0 4px 14px;
  background: transparent;
  border-left: 2px solid #d1d5db;
  border-radius: 0;
  color: var(--text-primary);
}

.markdown-content blockquote p:first-child {
  margin-top: 0;
}

.markdown-content blockquote p:last-child {
  margin-bottom: 0;
}

/* Tables */
.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

.markdown-content th,
.markdown-content td {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.markdown-content th {
  background: var(--bg-secondary);
  font-weight: 600;
}

.markdown-content tr:nth-child(even) {
  background: var(--bg-secondary);
}

/* Horizontal Rule */
.markdown-content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 24px 0;
}

/* Images */
.markdown-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 12px 0;
}

/* Strong and Emphasis */
.markdown-content strong {
  font-weight: 600;
}

.markdown-content em {
  font-style: italic;
}

/* Strikethrough */
.markdown-content del {
  text-decoration: line-through;
  color: var(--text-tertiary);
}

/* Streaming indicator */
.streaming-indicator {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.streaming-indicator::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: 14px;
  background: var(--accent-color);
  animation: blink 1s infinite;
  margin-left: 2px;
}

.streaming-status-text {
  display: inline-block;
  margin: 2px 0 8px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  background: linear-gradient(90deg, #9ca3af 0%, #d1d5db 35%, #6b7280 50%, #d1d5db 65%, #9ca3af 100%);
  background-size: 220% 100%;
  background-position: 0% 50%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer-slide 1.8s linear infinite;
}

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

@keyframes shimmer-slide {
  0% {
    background-position: 200% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}


/* Retry button for error messages */
.retry-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 12px;
  cursor: pointer;
  margin-top: 8px;
}

.retry-btn-error {
  background: var(--error-color);
  color: white;
}

.retry-btn-error:hover {
  background: #b91c1c;
}

.retry-btn-continue {
  background: rgba(59, 130, 246, 0.12);
  color: #2563eb;
  border: 1px solid rgba(59, 130, 246, 0.18);
}

.retry-btn-continue:hover {
  background: rgba(59, 130, 246, 0.18);
  color: #1d4ed8;
}

.message.user .retry-btn {
  align-self: flex-end;
}

.message-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  margin-bottom: 8px;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.12);
  color: #b45309;
  font-size: 12px;
  font-weight: 600;
}

/* Compact debug info (collapsible) */
.compact-info {
  margin-top: 12px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 12px;
}

.compact-info-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.compact-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.compact-info-item {
  display: flex;
  justify-content: space-between;
}

.compact-info-label {
  color: var(--text-tertiary);
}

.compact-info-value {
  font-family: monospace;
  color: var(--text-primary);
}

/* KaTeX Math Styles */
.markdown-content .katex {
  font-size: 1em;
}

.markdown-content .katex-display {
  margin: 16px 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.markdown-content .katex-display .katex {
  font-size: 1.1em;
}

/* Math error fallback */
.markdown-content .math-error {
  color: var(--error-color);
  font-family: monospace;
  background: #fef2f2;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.markdown-content .math-error div {
  padding: 8px;
}

/* Ensure inline math aligns properly */
.markdown-content .katex-inline {
  display: inline-flex;
  align-items: center;
}

/* Scrollbar for overflow math */
.markdown-content .katex-display::-webkit-scrollbar {
  height: 4px;
}

.markdown-content .katex-display::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}