/* ===== Chat Workspace ===== */
.chat-workspace {
  display: flex;
  height: 100%;
  background: var(--bg-deep);
}

/* ===== Sidebar ===== */
.chat-sidebar {
  width: 240px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
}
.chat-sidebar-head {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.chat-sidebar-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.chat-new-btn {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.chat-new-btn:hover {
  background: var(--green);
  color: #fff;
  border-color: var(--green);
}
.chat-history-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.chat-history-item {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
  transition: background-color .12s ease, color .12s ease;
  border: 1px solid transparent;
}
.chat-history-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.chat-history-item.active {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}
.chat-history-item-icon {
  font-size: 14px;
  flex-shrink: 0;
  opacity: 0.7;
  display: flex;
  align-items: center;
}
.chat-history-item-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.chat-history-item-del {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 12px;
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background-color .12s ease, color .12s ease;
}
.chat-history-item:hover .chat-history-item-del {
  display: flex;
}
.chat-history-item-del:hover {
  background: var(--red);
  color: #fff;
}
.chat-history-empty {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  padding: 24px 10px;
}

/* ===== Sidebar overlay (mobile) ===== */
.chat-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 550;
}

/* ===== Main area ===== */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-deep);
}

/* ===== Header ===== */
.chat-sidebar-toggle {
  display: none;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background-color .15s ease, color .15s ease;
}
.chat-sidebar-toggle:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-base);
  flex-shrink: 0;
  gap: 8px;
}
.chat-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.chat-header-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.chat-title-icon {
  font-size: 16px;
  display: flex;
  align-items: center;
  color: var(--green);
  flex-shrink: 0;
}
.chat-model-select {
  padding: 5px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  outline: none;
  max-width: 240px;
  cursor: pointer;
  transition: border-color .15s ease;
}
.chat-model-select:focus {
  border-color: var(--green);
}
.chat-header-btn {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color .15s ease, color .15s ease;
}
.chat-header-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
}

/* ===== Messages area ===== */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overscroll-behavior: contain;
}
.chat-loading {
  text-align: center;
  color: var(--text-muted);
  padding: 24px;
  font-size: 13px;
}
.chat-error {
  text-align: center;
  color: var(--red);
  padding: 24px;
  font-size: 13px;
}
.chat-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  gap: 10px;
}
.chat-welcome-icon {
  font-size: 44px;
  opacity: 0.5;
  margin-bottom: 4px;
}
.chat-welcome-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}
.chat-welcome-desc {
  font-size: 13px;
  color: var(--text-muted);
}
.chat-welcome-tip {
  font-size: 12px;
  color: var(--text-dim);
  max-width: 380px;
  text-align: center;
  line-height: 1.6;
}

/* ===== Message bubbles ===== */
.chat-msg {
  display: flex;
  gap: 10px;
  max-width: 80%;
  animation: chat-msg-in .2s ease-out;
}
@keyframes chat-msg-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.chat-msg-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}
.chat-msg-assistant {
  align-self: flex-start;
}
.chat-msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.chat-msg-user .chat-msg-avatar {
  background: var(--green-bg);
}
.chat-msg-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.chat-msg-streaming .chat-msg-content::after {
  content: '▫';
  animation: chat-blink 1s infinite;
  color: var(--green);
  margin-left: 2px;
}
@keyframes chat-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}
.chat-msg-content {
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.65;
  word-break: break-word;
  white-space: pre-wrap;
}
.chat-msg-user .chat-msg-content {
  background: var(--green);
  color: #fff;
  border-top-right-radius: 3px;
}
.chat-msg-assistant .chat-msg-content {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-top-left-radius: 3px;
}
.chat-msg-images {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 4px;
}
.chat-msg-image {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid var(--border);
  transition: transform .15s ease;
}
.chat-msg-image:hover {
  transform: scale(1.02);
}
.chat-error-inline {
  color: var(--red);
  font-size: 13px;
}
.chat-code-block {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 13px;
}
.chat-code-block code {
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  color: var(--text);
}
.chat-code-inline {
  background: var(--bg-deep);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  color: var(--blue);
}

/* ===== Input area ===== */
.chat-input-area {
  border-top: 1px solid var(--border);
  background: var(--bg-base);
  padding: 10px 16px 12px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 快捷指令提示行 */
.chat-input-hints {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 2px;
}
.chat-input-hints::-webkit-scrollbar {
  display: none;
}
.chat-input-hints:empty {
  display: none;
}

/* 复合输入容器 */
.chat-input-composer {
  border: 1px solid var(--border);
  border-radius: var(--radius-md, 10px);
  background: var(--bg-card);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color .15s ease;
}
.chat-input-composer:focus-within {
  border-color: var(--green);
}

/* 附件预览 */
.chat-attachments-preview {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.chat-attachments-preview:empty {
  display: none;
}
.chat-attach-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-muted);
}
.chat-attach-icon {
  flex-shrink: 0;
  font-size: 14px;
}
.chat-attach-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.chat-attach-remove {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
  transition: transform .12s ease;
}
.chat-attach-remove:hover {
  transform: scale(1.1);
}

/* 图片预览 */
.chat-images-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.chat-images-preview:empty {
  display: none;
}
.chat-input-composer .chat-images-preview {
  margin: -2px 0 2px;
}
.chat-img-thumb {
  position: relative;
  width: 56px;
  height: 56px;
}
.chat-img-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.chat-img-remove {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: transform .12s ease;
}
.chat-img-remove:hover {
  transform: scale(1.1);
}

/* 输入框 */
.chat-input {
  width: 100%;
  min-height: 24px;
  max-height: 160px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  color: var(--text);
  font-size: 14px;
  outline: none;
  resize: none;
  font-family: inherit;
  line-height: 1.5;
}
.chat-input::placeholder {
  color: var(--text-dim);
}
.chat-input:disabled {
  opacity: 0.5;
}

/* 底部工具栏 */
.chat-composer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.chat-composer-toolbar-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 附件按钮 */
.chat-attach-btn {
  height: 28px;
  padding: 0 6px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 12px;
  transition: background-color .15s ease, color .15s ease;
}
.chat-attach-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
}

/* 思考模式切换 */
.chat-deep-toggle {
  height: 28px;
  padding: 0 8px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  transition: background-color .15s ease, color .15s ease;
}
.chat-deep-toggle:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.chat-deep-toggle.active {
  background: var(--purple);
  color: #fff;
}
.chat-deep-label {
  margin-left: 2px;
}

/* 深度思考下拉菜单 */
.chat-deep-wrap {
  position: relative;
  display: inline-block;
}
.chat-deep-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  z-index: 600;
  min-width: 150px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md, 10px);
  padding: 4px;
  display: none;
  flex-direction: column;
  gap: 2px;
}
.chat-deep-menu:not(.u-hidden) {
  display: flex;
  animation: chat-deep-pop .18s cubic-bezier(.2,.8,.2,1) both;
}
@keyframes chat-deep-pop {
  from { opacity: 0; transform: translateY(6px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.chat-deep-item {
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background-color .12s ease, color .12s ease;
  user-select: none;
}
.chat-deep-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}
.chat-deep-item.active {
  color: var(--green);
}
.chat-deep-check {
  width: 14px;
  text-align: center;
  opacity: 0;
  font-size: 12px;
  flex-shrink: 0;
}
.chat-deep-item.active .chat-deep-check {
  opacity: 1;
}

/* 发送 / 停止按钮 */
.chat-send-btn,
.chat-stop-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color .15s ease, transform .12s ease;
}
.chat-send-btn {
  background: var(--green);
  color: #fff;
}
.chat-send-btn:hover {
  background: var(--primary-hover, #2ea043);
}
.chat-send-btn:active {
  transform: scale(0.96);
}
.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.chat-stop-btn {
  background: var(--red);
  color: #fff;
}
.chat-stop-btn:hover {
  filter: brightness(1.1);
}
.chat-stop-btn:active {
  transform: scale(0.96);
}

/* 快捷指令按钮 */
.chat-quick-cmd {
  padding: 4px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.chat-quick-cmd:hover {
  background: var(--bg-hover);
  color: var(--text);
  border-color: var(--border-light);
}

/* ===== Light theme adjustments ===== */
[data-theme="light"] .chat-workspace {
  background: var(--gradient-workspace, var(--bg-deep));
}
[data-theme="light"] .chat-msg-assistant .chat-msg-content {
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
[data-theme="light"] .chat-input {
  background: #fff;
}