/* ============================================
   AI Chat — 浮窗聊天面板
   ============================================ */

/* 触发按钮 (左下角) */
.ai-chat-trigger {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--md-accent-fg-color);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  z-index: 100;
  transition: transform 0.2s, box-shadow 0.2s;
}
.ai-chat-trigger:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

/* 浮窗面板 */
.ai-chat-panel {
  position: fixed;
  bottom: 5.5rem;
  left: 1.5rem;
  width: 420px;
  min-width: 300px;
  min-height: 200px;
  max-width: calc(100vw - 2rem);
  height: 560px;
  max-height: calc(100vh - 8rem);
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  display: none;
  flex-direction: column;
  z-index: 99;
  overflow: hidden;
  resize: both;
}
.ai-chat-panel.open {
  display: flex;
}

/* 标题栏 */
.ai-chat__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  flex-shrink: 0;
  background: var(--md-default-bg-color);
}
.ai-chat__title {
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.ai-chat__title-icon {
  font-size: 1rem;
}

/* 设置面板 */
.ai-chat__settings {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-bg-color);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.ai-chat__form-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.ai-chat__form-row label {
  font-size: 0.72rem;
  color: var(--md-default-fg-color--light);
  min-width: 60px;
  flex-shrink: 0;
}
.ai-chat__form-input,
.ai-chat__form-select {
  flex: 1;
  font-size: 0.75rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 4px;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  outline: none;
  min-width: 0;
}
.ai-chat__form-input:focus,
.ai-chat__form-select:focus {
  border-color: var(--md-accent-fg-color);
}
.ai-chat__form-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.2rem;
}
.ai-chat__form-save {
  font-size: 0.72rem;
  padding: 0.25rem 0.8rem;
  border: none;
  border-radius: 4px;
  background: var(--md-accent-fg-color);
  color: #fff;
  cursor: pointer;
}
.ai-chat__form-save:hover {
  opacity: 0.9;
}
.ai-chat__form-status {
  font-size: 0.7rem;
  color: #27ae60;
}
.ai-chat__form-divider {
  border-top: 1px solid var(--md-default-fg-color--lightest);
  margin: 0.3rem 0;
}
.ai-chat__form-section-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--md-default-fg-color--light);
}
.ai-chat__actions {
  display: flex;
  gap: 0.2rem;
}
.ai-chat__btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.3rem 0.4rem;
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light);
  transition: background 0.15s, color 0.15s;
  line-height: 1;
}
.ai-chat__btn:hover {
  background: var(--md-accent-fg-color--transparent);
  color: var(--md-accent-fg-color);
}

/* 设置面板 */
.ai-chat__settings {
  display: none;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  background: var(--md-default-fg-color--lightest);
  flex-shrink: 0;
}
.ai-chat__settings.open {
  display: block;
}
.ai-chat__field {
  margin-bottom: 0.5rem;
}
.ai-chat__field label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--md-default-fg-color--light);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.ai-chat__field input {
  width: 100%;
  padding: 0.4rem 0.6rem;
  font-size: 0.78rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  outline: none;
  box-sizing: border-box;
  font-family: var(--md-code-font), monospace;
}
.ai-chat__field input:focus {
  border-color: var(--md-accent-fg-color);
}
.ai-chat__field input[type="password"] {
  letter-spacing: 0.08em;
}
.ai-chat__settings-btns {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.4rem;
}
.ai-chat__settings-btns button {
  flex: 1;
  padding: 0.35rem;
  font-size: 0.72rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
}
.ai-chat__settings-btns button:hover {
  border-color: var(--md-accent-fg-color);
  color: var(--md-accent-fg-color);
}
.ai-chat__settings-btns button.primary {
  background: var(--md-accent-fg-color);
  color: #fff;
  border-color: var(--md-accent-fg-color);
}

/* 对话区域 */
.ai-chat__messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  scroll-behavior: smooth;
}
.ai-chat__messages::-webkit-scrollbar {
  width: 5px;
}
.ai-chat__messages::-webkit-scrollbar-thumb {
  background: var(--md-default-fg-color--lightest);
  border-radius: 3px;
}

/* 消息 */
.ai-chat__msg {
  margin-bottom: 0.8rem;
  font-size: 0.82rem;
  line-height: 1.65;
}
.ai-chat__msg--user {
  text-align: right;
}
.ai-chat__msg--user .ai-chat__bubble {
  background: var(--md-accent-fg-color);
  color: #fff;
  display: inline-block;
  padding: 0.55rem 0.9rem;
  border-radius: 14px 14px 4px 14px;
  max-width: 85%;
  text-align: left;
}
.ai-chat__msg--assistant .ai-chat__bubble {
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color);
  display: inline-block;
  padding: 0.55rem 0.9rem;
  border-radius: 14px 14px 14px 4px;
  max-width: 85%;
  text-align: left;
}
.ai-chat__bubble p {
  margin: 0 0 0.5em;
}
.ai-chat__bubble p:last-child {
  margin-bottom: 0;
}
.ai-chat__bubble code {
  font-size: 0.76rem;
  background: rgba(0,0,0,0.06);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-family: var(--md-code-font), monospace;
}
.ai-chat__bubble pre {
  margin: 0.5em 0;
  padding: 0.7rem;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.74rem;
  line-height: 1.55;
  background: rgba(0,0,0,0.04);
}
.ai-chat__bubble pre code {
  background: none;
  padding: 0;
}
.ai-chat__bubble ul, .ai-chat__bubble ol {
  margin: 0.4em 0;
  padding-left: 1.5em;
}
.ai-chat__bubble li {
  margin-bottom: 0.2em;
}

/* 加载动画 */
.ai-chat__typing {
  display: inline-flex;
  gap: 0.3rem;
  padding: 0.55rem 0.9rem;
}
.ai-chat__typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--md-default-fg-color--light);
  animation: ai-chat-bounce 1.2s infinite;
}
.ai-chat__typing span:nth-child(2) { animation-delay: 0.2s; }
.ai-chat__typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes ai-chat-bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-5px); }
}

/* 欢迎消息 */
.ai-chat__welcome {
  text-align: center;
  color: var(--md-default-fg-color--light);
  font-size: 0.8rem;
  padding: 2.5rem 1rem;
}
.ai-chat__welcome-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.6rem;
}

/* 输入区域 */
.ai-chat__input-area {
  display: flex;
  gap: 0.5rem;
  padding: 0.8rem 1rem;
  border-top: 1px solid var(--md-default-fg-color--lightest);
  flex-shrink: 0;
  background: var(--md-default-bg-color);
}
.ai-chat__input {
  flex: 1;
  padding: 0.5rem 0.8rem;
  font-size: 0.82rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  outline: none;
  resize: none;
  min-height: 2rem;
  max-height: 6rem;
  font-family: inherit;
  line-height: 1.5;
}
.ai-chat__input:focus {
  border-color: var(--md-accent-fg-color);
}
.ai-chat__input::placeholder {
  color: var(--md-default-fg-color--light);
  font-size: 0.8rem;
}
.ai-chat__send {
  background: var(--md-accent-fg-color);
  color: #fff;
  border: none;
  border-radius: 8px;
  width: 2.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.ai-chat__send:hover {
  opacity: 0.85;
}
.ai-chat__send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.ai-chat__send svg {
  width: 16px;
  height: 16px;
}

/* 未配置提示 */
.ai-chat__unconfigured {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.8rem;
  color: var(--md-default-fg-color--light);
}
.ai-chat__unconfigured a {
  color: var(--md-accent-fg-color);
  cursor: pointer;
  text-decoration: underline;
}

/* 语音按钮 */
.ai-chat__mic {
  background: none;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  width: 2.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: all 0.2s;
}
.ai-chat__mic:hover {
  border-color: var(--md-accent-fg-color);
  background: var(--md-accent-fg-color--transparent);
}
.ai-chat__mic.listening {
  border-color: #e53935;
  background: rgba(229, 57, 53, 0.1);
  animation: ai-chat-pulse 1s infinite;
}
@keyframes ai-chat-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(229, 57, 53, 0); }
}

/* 朗读按钮 */
.ai-chat__msg-actions {
  display: flex;
  gap: 0.3rem;
  margin-top: 0.2rem;
  padding-left: 0.6rem;
}
.ai-chat__speak-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
  opacity: 0.5;
  transition: opacity 0.2s, background 0.2s;
}
.ai-chat__speak-btn:hover {
  opacity: 1;
  background: var(--md-accent-fg-color--transparent);
}
.ai-chat__speak-btn.speaking {
  opacity: 1;
  animation: ai-chat-pulse-blue 1s infinite;
}
@keyframes ai-chat-pulse-blue {
  0%, 100% { background: rgba(66, 133, 244, 0.1); }
  50% { background: rgba(66, 133, 244, 0.2); }
}

/* 暗色模式 */
[data-md-color-scheme="slate"] .ai-chat-panel {
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
[data-md-color-scheme="slate"] .ai-chat__msg--user .ai-chat__bubble {
  background: var(--md-accent-fg-color);
}
[data-md-color-scheme="slate"] .ai-chat__msg--assistant .ai-chat__bubble {
  background: rgba(255,255,255,0.06);
}
[data-md-color-scheme="slate"] .ai-chat__bubble code {
  background: rgba(255,255,255,0.08);
}
[data-md-color-scheme="slate"] .ai-chat__settings {
  background: rgba(255,255,255,0.03);
}
[data-md-color-scheme="slate"] .ai-chat__field input {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.1);
}
[data-md-color-scheme="slate"] .ai-chat__bubble pre {
  background: rgba(255,255,255,0.04);
}

/* 响应式 */
@media (max-width: 480px) {
  .ai-chat-panel {
    width: calc(100vw - 1rem);
    left: 0.5rem;
    bottom: 5rem;
    height: calc(100vh - 7rem);
  }
  .ai-chat-trigger {
    left: 1rem;
    bottom: 1rem;
  }
}