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

:root {
  --bg-cream: #f5f5f0;
  --bg-white: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-tertiary: #9a9a9a;
  --border-light: #e5e5e0;
  --accent-coral: #c4917b;
  --accent-coral-dark: #b5826c;
  --user-bubble: #e8e8e3;
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-input: 0 4px 16px rgba(0, 0, 0, 0.06);
}

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

html {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-cream);
  color: var(--text-primary);
  height: 100vh;
  line-height: 1.5;
  overflow: hidden;
}

.hidden {
  display: none !important;
}

.backend-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  padding: 10px 16px;
  background: #b91c1c;
  color: #fff;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-soft);
}
.backend-banner code {
  background: rgba(0,0,0,0.2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}
.backend-banner button {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}
.backend-banner button:hover {
  background: rgba(255,255,255,0.3);
}
.backend-banner .banner-divider {
  opacity: 0.9;
  margin: 0 4px;
}

/* App Container */
.app-container {
  position: relative;
  height: 100vh;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

/* ==================== LEFT SIDEBAR ==================== */
.left-sidebar {
  width: 260px;
  min-width: 260px;
  height: 100vh;
  background: var(--bg-white);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.left-sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.new-chat-sidebar-btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  background: var(--bg-white);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.15s;
}

.new-chat-sidebar-btn:hover {
  background: var(--bg-cream);
  border-color: var(--text-tertiary);
}

.new-chat-sidebar-btn svg {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
}

.chat-history-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-history-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-primary);
  transition: background 0.15s;
  margin-bottom: 2px;
}

.chat-history-item:hover {
  background: var(--bg-cream);
}

.chat-history-item.active {
  background: var(--bg-cream);
}

.chat-history-item svg {
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.chat-history-item .chat-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-history-item .delete-chat-btn {
  opacity: 0;
  padding: 4px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s, background 0.15s;
}

.chat-history-item:hover .delete-chat-btn {
  opacity: 1;
}

.chat-history-item .delete-chat-btn:hover {
  background: rgba(0, 0, 0, 0.08);
}

.chat-history-item .delete-chat-btn svg {
  width: 14px;
  height: 14px;
  color: var(--text-tertiary);
}

.chat-history-empty {
  padding: 20px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 13px;
}

.chat-history-item.loading {
  background: rgba(196, 145, 123, 0.08);
}

.chat-loading-icon {
  animation: spin 1.5s linear infinite;
  color: var(--accent-coral);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ==================== HOME VIEW ==================== */
.home-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  overflow: hidden;
}

/* Plan Badge */
.plan-badge {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  font-size: 14px;
  box-shadow: var(--shadow-soft);
}

.plan-text {
  color: var(--text-secondary);
}

.separator {
  color: var(--text-tertiary);
}

.upgrade-link {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.upgrade-link:hover {
  color: var(--text-secondary);
}

/* Greeting Section */
.greeting-section {
  margin-bottom: 32px;
}

.greeting {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.asterisk-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-coral);
}

.greeting-text {
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 42px;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.tagline {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  letter-spacing: 0.3px;
}

/* ==================== INPUT STYLES ==================== */
.input-container {
  width: 100%;
  max-width: 680px;
}

.home-input {
  margin-top: 8px;
}

.input-form {
  width: 100%;
}

.input-wrapper {
  background: var(--bg-white);
  border-radius: 24px;
  box-shadow: var(--shadow-input);
  overflow: visible;
  position: relative;
}

.message-input {
  width: 100%;
  padding: 20px 24px 12px;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 16px;
  background: transparent;
  color: var(--text-primary);
  resize: none;
  min-height: 24px;
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.5;
}

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

.input-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px 12px;
}

.left-controls,
.right-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.control-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
}

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

.control-btn svg {
  width: 20px;
  height: 20px;
}

.model-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  color: var(--text-secondary);
  transition: background 0.15s;
}

.model-selector:hover {
  background: var(--bg-cream);
}

.model-selector svg {
  width: 16px;
  height: 16px;
}

.provider-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  color: var(--text-secondary);
  transition: background 0.15s;
}

.provider-selector:hover {
  background: var(--bg-cream);
}

.provider-selector svg {
  width: 16px;
  height: 16px;
}

.provider-menu {
  min-width: 180px;
}

.send-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--accent-coral);
  border-radius: 12px;
  cursor: pointer;
  color: white;
  transition: background 0.15s, opacity 0.15s;
}

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

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.send-btn svg {
  width: 20px;
  height: 20px;
}

.send-btn svg.hidden {
  display: none;
}

.send-btn.streaming {
  background: #e74c3c;
}

.send-btn.streaming:hover:not(:disabled) {
  background: #c0392b;
}

/* Hidden file input */
.file-input-hidden {
  display: none;
}

/* Attached files preview */
.attached-files {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 16px 0;
}

.attached-file {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--bg-cream);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

.attached-file svg {
  width: 14px;
  height: 14px;
}

.attached-file .remove-file {
  cursor: pointer;
  color: var(--text-tertiary);
  transition: color 0.15s;
}

.attached-file .remove-file:hover {
  color: #c0392b;
}

/* Thinking button toggle */
.thinking-btn.active {
  color: var(--accent-coral);
  background: rgba(196, 145, 123, 0.15);
}

/* Dropdown Container */
.dropdown-container {
  position: relative;
}

/* Model Selector Button */
.model-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  transition: background 0.15s;
}

.model-selector:hover {
  background: var(--bg-cream);
}

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

/* Provider Selector Button */
.provider-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  transition: background 0.15s;
}

.provider-selector:hover {
  background: var(--bg-cream);
}

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

.provider-menu {
  min-width: 180px;
}

/* Dropdown Menu - opens upward since it's at bottom of screen */
.dropdown-menu {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  min-width: 260px;
  max-height: 400px;
  overflow-y: auto;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s, visibility 0.15s, transform 0.15s;
  z-index: 1000;
}

.dropdown-container.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  flex-direction: column;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}

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

.dropdown-item .item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.dropdown-item .item-label {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.dropdown-item .item-desc {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.dropdown-item .check-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-coral);
  display: none;
}

.dropdown-item.selected .check-icon {
  display: block;
}

.dropdown-item .upgrade-badge {
  font-size: 12px;
  color: var(--accent-coral);
  font-weight: 500;
}

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

.dropdown-item.more-models {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.dropdown-item.more-models svg {
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
}

/* ==================== CHAT VIEW ==================== */
.chat-view {
  flex: 1;
  display: flex;
  flex-direction: row;
  height: 100vh;
  overflow: hidden;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  overflow: hidden;
}

/* Chat Header */
.chat-header {
  padding: 16px 24px;
  border-bottom: 1px solid transparent;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-title-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  transition: background 0.15s;
}

.chat-title-btn:hover {
  background: rgba(0, 0, 0, 0.04);
}

.chat-title-btn svg {
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
}

/* New Chat Button */
.new-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.new-chat-btn:hover {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-primary);
}

.new-chat-btn:active {
  background: rgba(0, 0, 0, 0.08);
}

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

/* Messages Container */
.messages-container {
  flex: 1 1 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px;
  padding-bottom: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  min-height: 0;
  max-height: 100%;
}

/* Message Styles */
.message {
  display: flex;
  animation: fadeIn 0.2s ease-out;
  width: 100%;
  max-width: 680px;
}

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

.message.assistant {
  justify-content: flex-start;
  flex-direction: column;
}

/* User Message */
.user .message-content {
  background: var(--user-bubble);
  padding: 12px 16px;
  border-radius: 20px;
  max-width: 85%;
  font-size: 15px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* Assistant Message */
.assistant .message-content {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  width: 100%;
}

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

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

/* Thinking Section (Reasoning/Chain of Thought) */
.thinking-section {
  background: #f8f8f6;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.thinking-section[open] {
  background: #f5f5f2;
}

.thinking-header {
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: var(--text-tertiary);
}

.thinking-header:hover {
  color: var(--text-secondary);
}

.thinking-header::marker {
  color: var(--text-tertiary);
}

.thinking-icon {
  font-size: 14px;
}

.thinking-content {
  padding: 8px 12px 12px;
  border-top: 1px solid var(--border-light);
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 300px;
  overflow-y: auto;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 11px;
  line-height: 1.5;
  color: #666;
}

/* Message Actions */
.message-actions {
  display: flex;
  gap: 4px;
  margin-top: 12px;
}

.action-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
}

.action-btn:hover {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-secondary);
}

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

/* Loading Indicator */
.loading-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
}

.loading-asterisk {
  width: 24px;
  height: 24px;
  color: var(--accent-coral);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.95);
  }
}

/* Chat Input Wrapper */
.chat-input-wrapper {
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  flex-grow: 0;
  background: var(--bg-cream);
  border-top: 1px solid var(--border-light);
}

.chat-input-wrapper .input-container {
  width: 100%;
  max-width: 680px;
}

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

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .greeting-text {
    font-size: 32px;
  }

  .input-container {
    max-width: 100%;
  }

  .message-input {
    font-size: 16px;
  }

  .user .message-content {
    max-width: 85%;
  }
}

@media (max-width: 480px) {
  .plan-badge {
    font-size: 13px;
    padding: 6px 12px;
  }

  .greeting-text {
    font-size: 28px;
  }

  .asterisk-icon {
    width: 24px;
    height: 24px;
  }
}

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

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

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

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

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  margin: 20px 0 12px 0;
  font-weight: 600;
  line-height: 1.3;
}

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child {
  margin-top: 0;
}

.markdown-content h1 { font-size: 1.5em; }
.markdown-content h2 { font-size: 1.3em; }
.markdown-content h3 { font-size: 1.15em; }
.markdown-content h4 { font-size: 1em; }

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

.markdown-content li {
  margin: 6px 0;
}

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

.markdown-content blockquote {
  margin: 12px 0;
  padding: 12px 16px;
  border-left: 3px solid var(--accent-coral);
  background: rgba(0, 0, 0, 0.02);
  border-radius: 0 8px 8px 0;
}

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

.markdown-content hr {
  margin: 20px 0;
  border: none;
  border-top: 1px solid var(--border-light);
}

.markdown-content a {
  color: var(--accent-coral-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.markdown-content a:hover {
  color: var(--accent-coral);
}

.markdown-content strong {
  font-weight: 600;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
}

.markdown-content th,
.markdown-content td {
  padding: 10px 12px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.markdown-content th {
  background: rgba(0, 0, 0, 0.02);
  font-weight: 600;
}

/* Code Blocks */
.markdown-content code {
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
  font-size: 13px;
}

.markdown-content pre {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 12px 0;
}

.markdown-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
  font-size: 13px;
  line-height: 1.5;
}

/* Legacy support */
.message-content code {
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 13px;
}

.message-content pre {
  background: rgba(0, 0, 0, 0.04);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 12px 0;
}

.message-content pre code {
  background: transparent;
  padding: 0;
}

/* Scrollbar Styling */
.messages-container::-webkit-scrollbar {
  width: 8px;
}

.messages-container::-webkit-scrollbar-track {
  background: transparent;
}

.messages-container::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 4px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ==================== SIDEBAR ==================== */
.sidebar {
  width: 320px;
  height: 100vh;
  background: #2a2a2a;
  color: #e0e0e0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid #3a3a3a;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar.collapsed {
  width: 0;
  border-left: none;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #3a3a3a;
  flex-shrink: 0;
}

.sidebar-header h3 {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  margin: 0;
}

.sidebar-toggle {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: #9a9a9a;
  transition: background 0.15s, color 0.15s;
}

.sidebar-toggle:hover {
  background: #3a3a3a;
  color: #ffffff;
}

.sidebar-toggle svg {
  width: 16px;
  height: 16px;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  min-height: 0;
  flex: 1;
  overflow: hidden;
}

.sidebar-section:first-of-type {
  flex: 0 0 auto;
  max-height: 200px;
  border-bottom: 1px solid #3a3a3a;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: #b0b0b0;
  padding: 16px 20px 12px;
  cursor: pointer;
  flex-shrink: 0;
}

.section-header svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

.section-header.collapsed svg {
  transform: rotate(-90deg);
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  padding: 0 20px 16px;
}

.tool-calls-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  overflow-y: auto;
  padding: 0 20px 16px;
  min-height: 0;
}

/* Sidebar scrollbar styling */
.steps-list::-webkit-scrollbar,
.tool-calls-list::-webkit-scrollbar {
  width: 6px;
}

.steps-list::-webkit-scrollbar-track,
.tool-calls-list::-webkit-scrollbar-track {
  background: transparent;
}

.steps-list::-webkit-scrollbar-thumb,
.tool-calls-list::-webkit-scrollbar-thumb {
  background: #4a4a4a;
  border-radius: 3px;
}

.steps-list::-webkit-scrollbar-thumb:hover,
.tool-calls-list::-webkit-scrollbar-thumb:hover {
  background: #5a5a5a;
}

.empty-state {
  font-size: 12px;
  color: #6b6b6b;
  padding: 8px 0;
}

/* Step Item */
.step-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  background: #333333;
  border-radius: 8px;
  font-size: 13px;
}

.step-status {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.step-status.pending {
  background: #4a4a4a;
  color: #808080;
}

.step-status.in_progress {
  background: var(--accent-coral);
  color: white;
  animation: pulse 1.5s ease-in-out infinite;
}

.step-status.completed {
  background: #4ade80;
  color: white;
}

.step-status svg {
  width: 12px;
  height: 12px;
}

.step-content {
  flex: 1;
  min-width: 0;
}

.step-text {
  color: #e0e0e0;
  line-height: 1.4;
}

.tool-call-item {
  background: #333333;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}

.tool-call-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  cursor: pointer;
  transition: background 0.15s;
}

.tool-call-header:hover {
  background: #3a3a3a;
}

.tool-call-icon {
  width: 20px;
  height: 20px;
  background: #4a4a4a;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-call-icon svg {
  width: 12px;
  height: 12px;
  color: #b0b0b0;
}

.tool-call-icon.running {
  background: var(--accent-coral);
  animation: pulse 1.5s ease-in-out infinite;
}

.tool-call-icon.running svg {
  color: white;
}

.tool-call-icon.success {
  background: #4ade80;
}

.tool-call-icon.success svg {
  color: white;
}

.tool-call-icon.error {
  background: #ef4444;
}

.tool-call-icon.error svg {
  color: white;
}

.tool-call-info {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.tool-call-name {
  font-size: 12px;
  font-weight: 500;
  color: #e0e0e0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-call-status {
  font-size: 10px;
  color: #808080;
  margin-top: 1px;
}

.tool-call-expand {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6b6b6b;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.tool-call-expand svg {
  width: 12px;
  height: 12px;
}

.tool-call-item.expanded .tool-call-expand {
  transform: rotate(180deg);
}

.tool-call-details {
  display: none;
  padding: 8px;
  background: #2a2a2a;
  border-top: 1px solid #3a3a3a;
  font-size: 11px;
  max-height: 150px;
  overflow-y: auto;
}

.tool-call-item.expanded .tool-call-details {
  display: block;
}

.tool-detail-section {
  margin-bottom: 6px;
}

.tool-detail-section:last-child {
  margin-bottom: 0;
}

.tool-detail-label {
  font-size: 9px;
  font-weight: 600;
  color: #808080;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 3px;
}

.tool-call-details pre {
  background: #1e1e1e;
  padding: 6px 8px;
  border-radius: 4px;
  overflow-x: auto;
  color: #a0a0a0;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 9px;
  line-height: 1.3;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 60px;
  overflow-y: auto;
}

/* Artifact Item */
.artifact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: #333333;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}

.artifact-item:hover {
  background: #3a3a3a;
}

.artifact-icon {
  width: 32px;
  height: 32px;
  background: #4a4a4a;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.artifact-icon svg {
  width: 16px;
  height: 16px;
  color: #b0b0b0;
}

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

.artifact-name {
  font-size: 13px;
  font-weight: 500;
  color: #e0e0e0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.artifact-type {
  font-size: 11px;
  color: #808080;
  margin-top: 2px;
}

/* Inline Tool Call in Messages */
.inline-tool-call {
  background: #fafaf8;
  border: 1px solid #e8e8e3;
  border-radius: 10px;
  margin: 12px 0;
  overflow: hidden;
}

.inline-tool-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  transition: background 0.15s;
}

.inline-tool-header:hover {
  background: #f5f5f0;
}

.inline-tool-header svg {
  width: 16px;
  height: 16px;
  color: var(--accent-coral);
}

.inline-tool-header .tool-name {
  font-weight: 600;
  color: var(--text-primary);
}

.inline-tool-header .tool-preview {
  color: var(--text-tertiary);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 350px;
  font-family: 'Monaco', 'Menlo', monospace;
}

.inline-tool-header .expand-icon {
  margin-left: auto;
  color: var(--text-tertiary);
  transition: transform 0.2s;
}

.inline-tool-call.expanded .expand-icon {
  transform: rotate(180deg);
}

.inline-tool-result {
  display: none;
  padding: 12px 14px;
  background: #f5f5f0;
  border-top: 1px solid #e8e8e3;
  max-height: 280px;
  overflow-y: auto;
}

.inline-tool-call.expanded .inline-tool-result {
  display: block;
}

.inline-tool-result pre {
  background: #2d2d2d;
  color: #e0e0e0;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 12px;
  overflow-x: auto;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 120px;
  overflow-y: auto;
  line-height: 1.5;
}

.tool-section {
  margin-bottom: 10px;
}

.tool-section:last-child {
  margin-bottom: 0;
}

.tool-section-label {
  font-size: 10px;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

/* Output section success styling */
.tool-output-section pre {
  background: #1a3328;
  color: #7dd3a8;
  border-left: 3px solid #4ade80;
}

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

/* ==================== BROWSER EMBED STYLES ==================== */

/* Inline Browser Embed (in chat messages) */
.inline-browser-embed {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  margin: 16px 0;
  overflow: hidden;
  box-shadow: var(--shadow-input);
  transition: all 0.3s ease;
}

.inline-browser-embed.fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  margin: 0;
  border-radius: 0;
  border: none;
}

.browser-embed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-cream);
  border-bottom: 1px solid var(--border-light);
}

.browser-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.browser-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-coral);
}

.browser-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.browser-session-badge {
  font-size: 10px;
  padding: 3px 8px;
  background: rgba(196, 145, 123, 0.15);
  color: var(--accent-coral);
  border-radius: 10px;
  font-weight: 500;
}

.browser-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.browser-action-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
}

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

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

.browser-embed-content {
  position: relative;
  width: 100%;
  height: 400px;
  background: var(--bg-cream);
}

.inline-browser-embed.fullscreen .browser-embed-content {
  height: calc(100vh - 80px);
}

.browser-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
}

.browser-embed-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: var(--bg-cream);
  border-top: 1px solid var(--border-light);
}

.browser-url {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: 'Monaco', 'Menlo', monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 40px);
}

.browser-copy-url {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
}

.browser-copy-url:hover {
  background: var(--bg-white);
  color: var(--text-primary);
}

.browser-copy-url svg {
  width: 14px;
  height: 14px;
}

/* Browser Sidebar Section */
.browser-section {
  flex: 1 !important;
  max-height: none !important;
  min-height: 250px;
  border-bottom: 1px solid #3a3a3a;
}

.browser-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-right: 8px !important;
}

.browser-sidebar-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.browser-sidebar-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  color: #808080;
  transition: background 0.15s, color 0.15s;
}

.browser-sidebar-btn:hover {
  background: #3a3a3a;
  color: #e0e0e0;
}

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

.browser-sidebar-content {
  flex: 1;
  padding: 8px;
  min-height: 200px;
}

.browser-sidebar-iframe {
  width: 100%;
  height: 100%;
  min-height: 200px;
  border: none;
  border-radius: 6px;
  background: #fff;
}


/* Left sidebar expand button (visible when collapsed) */
.left-sidebar-expand-btn {
  display: none;
  position: absolute;
  left: 0;
  top: 16px;
  width: 24px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
  border-left: none;
  background: var(--bg-white);
  border-radius: 0 6px 6px 0;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
  z-index: 10;
}

.left-sidebar-expand-btn:hover {
  background: var(--bg-cream);
  color: var(--text-primary);
}

.left-sidebar-expand-btn svg {
  width: 14px;
  height: 14px;
}

.left-sidebar-expand-btn.visible {
  display: flex;
}

/* Right sidebar expand button (visible when collapsed) */
.right-sidebar-expand-btn {
  display: none;
  position: absolute;
  right: 0;
  top: 16px;
  width: 24px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
  border-right: none;
  background: var(--bg-white);
  border-radius: 6px 0 0 6px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
  z-index: 10;
}

.right-sidebar-expand-btn:hover {
  background: var(--bg-cream);
  color: var(--text-primary);
}

.right-sidebar-expand-btn svg {
  width: 14px;
  height: 14px;
}

.right-sidebar-expand-btn.visible {
  display: flex;
}

.left-sidebar {
  transition: width 0.2s ease, min-width 0.2s ease;
}

.left-sidebar.collapsed {
  width: 0;
  min-width: 0;
  overflow: hidden;
  border-right: none;
}

.left-sidebar.collapsed .left-sidebar-header,
.left-sidebar.collapsed .chat-history-list {
  opacity: 0;
  visibility: hidden;
}

.left-sidebar-toggle {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
  background: var(--bg-white);
  border-radius: 0 6px 6px 0;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
  z-index: 10;
}

.left-sidebar-toggle:hover {
  background: var(--bg-cream);
  color: var(--text-primary);
}

.left-sidebar-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

.left-sidebar.collapsed + .main-content .left-sidebar-toggle {
  left: 0;
  border-left: none;
}

.left-sidebar.collapsed + .main-content .left-sidebar-toggle svg {
  transform: rotate(180deg);
}

/* Header toggle button (inside sidebar) */
.sidebar-collapse-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: background 0.15s, color 0.15s;
  margin-left: auto;
}

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

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

/* Sidebar Responsive */
@media (max-width: 1024px) {
  .sidebar {
    width: 280px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

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