.chatPanel {
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: var(--bg-primary);
}

.messageList {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.emptyState {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-align: center;
  padding: var(--space-8);
}

.emptyIcon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.emptyTitle {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.emptyDescription {
  font-size: var(--text-sm);
  max-width: 320px;
}

.message {
  display: flex;
  gap: var(--space-3);
  max-width: 800px;
  animation: fadeIn 0.3s ease;
}

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

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message.assistant {
  align-self: flex-start;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.avatar:hover {
  transform: scale(1.05);
}

.avatar.user {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
}

.avatar.assistant {
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
  border: 1px solid var(--border-default);
}

.messageWrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 100%;
}

.messageContent {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  max-width: 100%;
  word-break: break-word;
  transition: all var(--transition-fast);
}

.message.user .messageContent {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

.message.assistant .messageContent {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-bottom-left-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.messageText {
  line-height: var(--leading-relaxed);
  white-space: pre-wrap;
}

.streamingCursor {
  display: inline-block;
  width: 8px;
  height: 18px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  margin-left: 2px;
  border-radius: 2px;
  animation: blink 1s infinite;
}

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

.spinningIcon {
  animation: spin 1s linear infinite;
}

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

.messageError {
  color: var(--accent-error);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

.statusBar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
  padding: var(--space-1) var(--space-2);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-sm);
}

.messageActions {
  display: flex;
  gap: var(--space-1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.message:hover .messageActions {
  opacity: 1;
}

.actionButton {
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.actionButton:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

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

.editArea {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-sizing: border-box;
}

.editTextarea {
  width: 100%;
  min-height: 40px;
  padding: var(--space-3);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  resize: none;
  overflow: hidden;
}

.editTextarea:focus {
  border-color: var(--accent-primary);
  outline: none;
}

.editActions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

.editActionButton {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background-color: var(--accent-success);
  color: white;
  font-size: var(--text-xs);
  transition: all var(--transition-fast);
}

.editActionButton:hover {
  opacity: 0.9;
}

.editActionButton.cancel {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.editActionButton.cancel:hover {
  background-color: var(--bg-elevated);
}

/* Markdown Styling - Compact (matching AI Studio) */
.messageText h1, .messageText h2, .messageText h3 {
  margin-top: 0.5em;
  margin-bottom: 0.15em;
  font-weight: 600;
}

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

.messageText h1 { font-size: 1.25em; }
.messageText h2 { font-size: 1.1em; }
.messageText h3 { font-size: 1em; }

.messageText p {
  margin-bottom: 0.3em;
}

.messageText p + p {
  margin-top: 0.2em;
}

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

.messageText ul, .messageText ol {
  margin-left: 1.25em;
  margin-bottom: 0.35em;
  padding-left: 0;
}

.messageText li {
  margin-bottom: 0.15em;
}

.messageText li:last-child {
  margin-bottom: 0;
}

.codeBlock {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  overflow-x: auto;
  margin: 0.5em 0;
}

.codeBlock code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.inlineCode {
  background-color: var(--bg-tertiary);
  padding: 1px 4px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--accent-primary);
}

.inputArea {
  padding: var(--space-4);
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.inputWrapper {
  display: flex;
  gap: var(--space-3);
  align-items: flex-end;
  max-width: 800px;
  margin: 0 auto;
}

.textarea {
  flex: 1;
  resize: none;
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  min-height: 48px;
  max-height: 200px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.sendButton {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.sendButton:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

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

.stopButton {
  background: var(--accent-error);
}

.stopButton:hover:not(:disabled) {
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.actionButtons {
  display: flex;
  gap: var(--space-2);
}

.clearButton {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.clearButton:hover:not(:disabled) {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
}

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

/* Thinking Section Styles */
.thinkingSection {
  margin-top: var(--space-2);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.thinkingSection.expanded {
  border-color: var(--accent-primary);
}

.thinkingHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

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

.thinkingHeaderLeft {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.thinkingHeaderRight {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.thinkingTimer {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-primary);
  background-color: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.thinkingChevron {
  transition: transform var(--transition-fast);
}

.thinkingChevron.rotated {
  transform: rotate(180deg);
}

.thinkingContent {
  padding: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-height: 300px;
  overflow-y: auto;
}

.thinkingContent p {
  margin-bottom: 0.5em;
}

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

/* Thinking Error State */
.thinkingSection.thinkingError {
  border-color: var(--accent-error);
}

.thinkingSection.thinkingError .thinkingHeader {
  color: var(--accent-error);
}

.errorIcon {
  color: var(--accent-error);
}

.responseTimer {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-success);
  background-color: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.totalTimeBadge {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  padding: var(--space-1) 0;
}

.totalTimeBadge span {
  color: var(--accent-success);
  background-color: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}