:root {
  --bg-main: #FAF9F5;
  --bg-sidebar: #F3F0E8;
  --bg-card: #FFFFFF;
  --bg-user-msg: #F0ECE1;
  --bg-hover: #ECE8DE;
  --bg-active: #E4DFD3;
  --border-light: #E8E5DC;
  --border-subtle: #D8D4C8;
  --border-focus: #C15F3C;
  --text-main: #1F1E1D;
  --text-secondary: #63615C;
  --text-muted: #8F8B82;
  --accent-terracotta: #C15F3C;
  --accent-hover: #AA5233;
  --accent-soft: rgba(193, 95, 60, 0.1);
  --code-bg: #1E1E1E;
  --code-header: #2D2D2D;
  --font-serif: "Newsreader", "Charter", "Bitstream Charter", "Iowan Old Style", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Menlo, Consolas, Monaco, monospace;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 9999px;
  --sidebar-width: 270px;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 50;
}

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

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-logo {
  width: 28px;
  height: 28px;
  color: var(--accent-terracotta);
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.brand-badge {
  font-size: 11px;
  padding: 2px 7px;
  background: var(--accent-soft);
  color: var(--accent-terracotta);
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.new-chat-btn {
  margin: 0 14px 12px;
  padding: 10px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all 0.15s ease;
}

.new-chat-btn:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-subtle);
  transform: translateY(-1px);
}

.new-chat-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.shortcut-badge {
  font-size: 11px;
  color: var(--text-muted);
  border: 1px solid var(--border-light);
  padding: 1px 5px;
  border-radius: 4px;
}

/* Chat History List */
.history-container {
  flex: 1;
  overflow-y: auto;
  padding: 0 10px 16px;
}

.history-section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 12px 8px 6px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13.5px;
  color: var(--text-secondary);
  transition: background-color 0.12s ease;
  position: relative;
  margin-bottom: 2px;
  text-decoration: none;
}

.history-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
}

.history-item.active {
  background-color: var(--bg-active);
  color: var(--text-main);
  font-weight: 500;
}

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

.history-actions {
  display: none;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
}

.history-item:hover .history-actions {
  display: flex;
}

.history-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.history-btn:hover {
  color: var(--text-main);
  background: rgba(0,0,0,0.06);
}

.history-btn.delete:hover {
  color: #DC2626;
}

/* Sidebar Footer / User Profile */
.sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-sidebar);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-terracotta);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-main);
}

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

.logout-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.logout-btn:hover {
  background-color: var(--bg-hover);
  color: #DC2626;
}

/* Main Content Area */
.main-content {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  background-color: var(--bg-main);
  overflow: hidden;
}

/* Top Bar */
.top-navbar {
  height: 52px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  background-color: rgba(250, 249, 245, 0.9);
  backdrop-filter: blur(8px);
  z-index: 20;
}

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

.toggle-sidebar-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 6px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
}

.toggle-sidebar-btn:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}

.current-model-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s;
}

.current-model-pill:hover {
  border-color: var(--border-subtle);
  background-color: var(--bg-hover);
}

.current-chat-title-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  max-width: 280px;
  padding-left: 6px;
  border-left: 1px solid var(--border-light);
}

.current-chat-title {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

.current-chat-title:hover {
  text-decoration: underline;
}

.edit-title-btn {
  padding: 3px !important;
  color: var(--text-muted) !important;
}

.edit-title-btn:hover {
  color: var(--text-main) !important;
}

.context-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  background-color: var(--accent-soft);
  color: var(--accent-terracotta);
  border-radius: var(--radius-pill);
  font-size: 11.5px;
  font-weight: 500;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 7px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  transition: all 0.15s;
}

.nav-icon-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
}

/* Messages Scroll Container */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  scroll-behavior: smooth;
}

.messages-inner {
  width: 100%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Empty State / Welcome Screen */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-top: 8vh;
  width: 100%;
  max-width: 720px;
  animation: fadeIn 0.4s ease;
}

.empty-logo-wrap {
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
  color: var(--accent-terracotta);
}

.empty-greeting {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

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

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

.suggestion-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  transition: all 0.18s ease;
  box-shadow: var(--shadow-sm);
}

.suggestion-card:hover {
  border-color: var(--border-subtle);
  background-color: var(--bg-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.suggestion-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.suggestion-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Chat Message Styles */
.message-row {
  display: flex;
  width: 100%;
  animation: fadeIn 0.25s ease;
}

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

.message-row.assistant {
  justify-content: flex-start;
  gap: 14px;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: var(--accent-soft);
  color: var(--accent-terracotta);
}

.message-bubble {
  max-width: 88%;
  font-size: 15px;
  line-height: 1.65;
  word-break: break-word;
}

.message-row.user .message-bubble {
  background-color: var(--bg-user-msg);
  color: var(--text-main);
  padding: 12px 18px;
  border-radius: 18px 18px 4px 18px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.message-row.assistant .message-bubble {
  width: 100%;
  max-width: 100%;
  color: var(--text-main);
}

/* Reasoning / Thinking Accordion */
.reasoning-box {
  margin-bottom: 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background-color: rgba(243, 240, 232, 0.5);
  overflow: hidden;
  transition: all 0.2s ease;
}

.reasoning-header {
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  font-size: 12.5px;
  color: var(--text-secondary);
  font-weight: 500;
  background-color: rgba(243, 240, 232, 0.8);
}

.reasoning-header:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
}

.reasoning-title-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.thinking-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-terracotta);
  animation: pulse 1.5s infinite;
}

.reasoning-body {
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  border-top: 1px solid var(--border-light);
  white-space: pre-wrap;
  max-height: 380px;
  overflow-y: auto;
  background-color: var(--bg-card);
}

/* Markdown Rendering in Assistant Message */
.markdown-body {
  font-size: 15px;
  line-height: 1.7;
}

.markdown-body p {
  margin-bottom: 14px;
}

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

.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text-main);
  margin: 22px 0 10px;
  letter-spacing: -0.3px;
}

.markdown-body h1 { font-size: 22px; }
.markdown-body h2 { font-size: 18px; }
.markdown-body h3 { font-size: 16px; }

.markdown-body ul, .markdown-body ol {
  margin: 10px 0 14px 22px;
}

.markdown-body li {
  margin-bottom: 6px;
}

.markdown-body blockquote {
  border-left: 3px solid var(--accent-terracotta);
  padding: 6px 14px;
  margin: 14px 0;
  color: var(--text-secondary);
  background-color: var(--bg-hover);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.markdown-body code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  background-color: var(--bg-hover);
  padding: 2px 6px;
  border-radius: 4px;
  color: #B91C1C;
}

.markdown-body pre {
  margin: 14px 0;
  background-color: var(--code-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.code-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 14px;
  background-color: var(--code-header);
  color: #A0A0A0;
  font-size: 12px;
  font-family: var(--font-mono);
}

.code-copy-btn {
  background: none;
  border: none;
  color: #A0A0A0;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s;
}

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

.markdown-body pre code {
  display: block;
  padding: 14px;
  color: #F8F8F2;
  background-color: transparent;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.5;
}

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

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

.markdown-body th {
  background-color: var(--bg-hover);
  font-weight: 600;
}

/* Assistant Message Actions */
.message-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.msg-action-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
}

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

.msg-model-badge {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
}

/* Floating Bottom Input Area */
.input-dock {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 0 20px 20px;
  background: linear-gradient(180deg, rgba(250, 249, 245, 0) 0%, rgba(250, 249, 245, 0.95) 25%, rgba(250, 249, 245, 1) 100%);
  pointer-events: none;
  z-index: 30;
}

.input-card {
  width: 100%;
  max-width: 800px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 12px 14px 10px;
  pointer-events: auto;
  transition: border-color 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.input-card:focus-within {
  border-color: var(--accent-terracotta);
  box-shadow: 0 0 0 1px var(--accent-terracotta), var(--shadow-md);
}

.input-textarea {
  width: 100%;
  min-height: 48px;
  max-height: 200px;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-main);
  background: transparent;
  padding: 4px 0;
}

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

.input-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(0, 0, 0, 0.04);
}

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

.model-select-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--bg-hover);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.model-select-btn:hover {
  background: var(--bg-active);
  color: var(--text-main);
}

.tool-icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  transition: all 0.15s;
}

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

.send-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: var(--accent-terracotta);
  border: none;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
}

.send-btn:hover:not(:disabled) {
  background-color: var(--accent-hover);
  transform: scale(1.05);
}

.send-btn:disabled {
  background-color: var(--border-subtle);
  cursor: not-allowed;
  opacity: 0.6;
}

.send-btn.stop-btn {
  background-color: #1F1E1D;
  border-radius: var(--radius-sm);
}

/* Model Dropdown Menu */
.model-dropdown-menu {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 0;
  width: 320px;
  max-height: 420px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 100;
  animation: slideUp 0.18s ease;
}

.model-dropdown-menu.show {
  display: flex;
}

.model-search-box {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-light);
  background-color: var(--bg-main);
}

.model-search-input {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  background-color: var(--bg-card);
  color: var(--text-main);
}

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

.model-items-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
}

.model-group-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  padding: 8px 12px 4px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.model-item {
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background-color 0.12s;
}

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

.model-item.active {
  background-color: var(--accent-soft);
  color: var(--accent-terracotta);
  font-weight: 500;
}

.model-item-name {
  font-size: 13.5px;
  display: flex;
  flex-direction: column;
}

.model-item-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.model-item-badge {
  font-size: 10px;
  padding: 2px 6px;
  background: var(--bg-hover);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
}

/* Modals & Overlays */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(26, 25, 21, 0.45);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal-overlay.show {
  display: flex;
}

.modal-card {
  width: 90%;
  max-width: 440px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 28px 24px;
  position: relative;
  animation: scaleUp 0.2s ease;
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
}

.modal-close-btn:hover {
  color: var(--text-main);
  background: var(--bg-hover);
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.modal-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  background-color: var(--bg-main);
  color: var(--text-main);
  transition: border-color 0.15s;
}

.form-input:focus {
  border-color: var(--accent-terracotta);
  background-color: var(--bg-card);
}

.form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-family: var(--font-sans);
  outline: none;
  background-color: var(--bg-main);
  color: var(--text-main);
  resize: vertical;
  min-height: 80px;
}

.form-textarea:focus {
  border-color: var(--accent-terracotta);
  background-color: var(--bg-card);
}

.btn-primary {
  width: 100%;
  padding: 11px;
  background-color: var(--accent-terracotta);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  margin-top: 10px;
}

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

.form-error {
  color: #DC2626;
  font-size: 13px;
  margin-top: 8px;
  display: none;
}

/* Typing Cursor Effect */
.typing-cursor::after {
  content: '▋';
  color: var(--accent-terracotta);
  animation: blink 0.8s infinite;
  margin-left: 2px;
}

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(193, 95, 60, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(193, 95, 60, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(193, 95, 60, 0); }
}

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

/* Responsive Styles */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  .suggestion-grid {
    grid-template-columns: 1fr;
  }
  .messages-container {
    padding: 16px 12px 140px;
  }
  .input-dock {
    padding: 0 12px 12px;
  }
  .empty-greeting {
    font-size: 26px;
  }
}