/* =========================================================
 * AI 工具 · 统一聊天卡片 (用于 spark-ai / turing-bot 等)
 * 依赖 yst-theme.css / yst-tool-shell.css / yst-tool-page.css
 * ========================================================= */

.ai-chat-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ------- 顶栏: 模型信息 + 操作 ------- */
.ai-chat-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--yst-border);
  background: var(--yst-bg-subtle);
  flex-wrap: wrap;
  gap: 8px;
}
.ai-chat-model {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 500 13px/1 var(--yst-font);
  color: var(--yst-text);
}
.ai-chat-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--yst-brand);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
  flex-shrink: 0;
}
.ai-chat-dot[data-status="typing"] {
  animation: aiChatPulse 1.2s ease-in-out infinite;
}
@keyframes aiChatPulse {
  0%,100% { box-shadow: 0 0 0 3px rgba(16,185,129,.15); }
  50%     { box-shadow: 0 0 0 6px rgba(16,185,129,.05); }
}
.ai-chat-model-name {
  font-weight: 700;
  font-size: 14px;
  color: var(--yst-text);
}
.ai-chat-model-sub {
  color: var(--yst-text-muted);
  font-size: 12px;
}
.ai-chat-actions { display: inline-flex; gap: 6px; }
.ai-chat-btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font: 500 12px/1 var(--yst-font);
  color: var(--yst-text-muted);
  background: transparent;
  border: 1px solid var(--yst-border);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s ease;
}
.ai-chat-btn-icon:hover {
  color: var(--yst-brand);
  border-color: var(--yst-brand);
  background: rgba(16,185,129,.05);
}

/* ------- 对话主体 ------- */
.ai-chat-body {
  min-height: 420px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 24px 18px;
  background: var(--yst-bg-card);
  scroll-behavior: smooth;
}

.ai-chat-welcome {
  text-align: center;
  padding: 20px 8px 8px;
}
.ai-chat-welcome-icon { display: inline-block; margin-bottom: 10px; }
.ai-chat-welcome-title {
  font: 700 20px/1.3 var(--yst-font);
  color: var(--yst-text);
  margin: 8px 0 6px;
  letter-spacing: var(--yst-letter-spacing);
}
.ai-chat-welcome-desc {
  font: 14px/1.6 var(--yst-font);
  color: var(--yst-text-muted);
  max-width: 480px;
  margin: 0 auto 20px;
}
.ai-chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 620px;
  margin: 0 auto;
}
.ai-chat-suggestion {
  padding: 8px 14px;
  font: 500 13px/1.4 var(--yst-font);
  color: var(--yst-text);
  background: var(--yst-bg-subtle);
  border: 1px solid var(--yst-border);
  border-radius: 999px;
  cursor: pointer;
  transition: all .15s ease;
}
.ai-chat-suggestion:hover {
  color: var(--yst-brand);
  border-color: var(--yst-brand);
  background: rgba(16,185,129,.08);
  transform: translateY(-1px);
}

/* ------- 消息气泡 ------- */
.ai-chat-messages { display: flex; flex-direction: column; gap: 14px; }
.ai-chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  animation: aiChatFadeIn .3s ease;
}
@keyframes aiChatFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.ai-chat-msg-avatar {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: 700 13px/1 var(--yst-font);
  color: #fff;
}
.ai-chat-msg[data-role="user"] { flex-direction: row-reverse; }
.ai-chat-msg[data-role="user"] .ai-chat-msg-avatar {
  background: linear-gradient(135deg, #667eea, #5a67d8);
}
.ai-chat-msg[data-role="assistant"] .ai-chat-msg-avatar {
  background: linear-gradient(135deg, var(--yst-brand), var(--yst-brand-hover));
}
.ai-chat-msg-bubble {
  max-width: min(78%, 640px);
  padding: 10px 14px;
  font: 14px/1.7 var(--yst-font);
  color: var(--yst-text);
  background: var(--yst-bg-subtle);
  border: 1px solid var(--yst-border);
  border-radius: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  letter-spacing: var(--yst-letter-spacing);
}
.ai-chat-msg[data-role="user"] .ai-chat-msg-bubble {
  background: var(--yst-brand);
  color: #fff;
  border-color: var(--yst-brand);
}
.ai-chat-msg[data-role="assistant"] .ai-chat-msg-bubble.is-loading {
  color: var(--yst-text-muted);
  font-style: italic;
}
.ai-chat-msg[data-role="assistant"] .ai-chat-msg-bubble.is-error {
  color: #b91c1c;
  background: #fef2f2;
  border-color: #fecaca;
}
.ai-chat-msg-meta {
  margin-top: 6px;
  font: 11px/1 var(--yst-font);
  color: var(--yst-text-muted);
  display: flex;
  gap: 10px;
  align-items: center;
}
.ai-chat-msg[data-role="user"] .ai-chat-msg-meta { justify-content: flex-end; }
.ai-chat-msg-copy {
  background: none;
  border: none;
  color: var(--yst-text-muted);
  cursor: pointer;
  padding: 0;
  font: inherit;
}
.ai-chat-msg-copy:hover { color: var(--yst-brand); }

/* 打字点动画 */
.ai-chat-typing-dots {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}
.ai-chat-typing-dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--yst-text-muted);
  animation: aiChatTypingDot 1.4s infinite ease-in-out both;
}
.ai-chat-typing-dots span:nth-child(2) { animation-delay: .2s; }
.ai-chat-typing-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes aiChatTypingDot {
  0%, 80%, 100% { transform: scale(0.7); opacity: .4; }
  40% { transform: scale(1); opacity: 1; }
}

/* ------- 输入区 ------- */
.ai-chat-input-wrap {
  border-top: 1px solid var(--yst-border);
  padding: 12px 18px 14px;
  background: var(--yst-bg-card);
}
.ai-chat-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  border: 1px solid var(--yst-border);
  background: var(--yst-bg-card);
  border-radius: 12px;
  padding: 8px 8px 8px 12px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.ai-chat-input-row:focus-within {
  border-color: var(--yst-brand);
  box-shadow: 0 0 0 3px rgba(16,185,129,.12);
}
.ai-chat-input {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  background: transparent;
  font: 14px/1.6 var(--yst-font);
  color: var(--yst-text);
  max-height: 160px;
  min-height: 24px;
  letter-spacing: var(--yst-letter-spacing);
}
.ai-chat-input::placeholder { color: var(--yst-text-muted); }
.ai-chat-send {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 10px;
  border: none;
  background: var(--yst-brand);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .15s ease;
}
.ai-chat-send:hover:not(:disabled) {
  background: var(--yst-brand-hover);
  transform: translateY(-1px);
}
.ai-chat-send:disabled {
  background: var(--yst-border);
  cursor: not-allowed;
}
.ai-chat-footline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  font: 11px/1 var(--yst-font);
  color: var(--yst-text-muted);
  letter-spacing: var(--yst-letter-spacing);
}
.ai-chat-count { font-variant-numeric: tabular-nums; }

/* ------- 通用段标题 / 信息卡 / FAQ / 相关工具 ------- */
.ai-section-title {
  font: 700 16px/1.4 var(--yst-font);
  color: var(--yst-text);
  margin: 0 0 12px;
  letter-spacing: var(--yst-letter-spacing);
}
.ai-section-title--sm { font-size: 14px; margin-bottom: 8px; }

.ai-info-card { padding: 18px 20px; }
.ai-info-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.ai-info-list li {
  position: relative;
  padding-left: 18px;
  font: 14px/1.7 var(--yst-font);
  color: var(--yst-text);
  letter-spacing: var(--yst-letter-spacing);
}
.ai-info-list li::before {
  content: "";
  position: absolute;
  left: 4px; top: 11px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--yst-brand);
}
.ai-info-list strong { color: var(--yst-text); font-weight: 700; }

.ai-faq-card { padding: 18px 20px; }
.ai-faq-item {
  padding: 10px 0;
  border-bottom: 1px dashed var(--yst-border);
}
.ai-faq-item:last-child { border-bottom: none; }
.ai-faq-item > summary {
  list-style: none;
  cursor: pointer;
  font: 600 14px/1.5 var(--yst-font);
  color: var(--yst-text);
  position: relative;
  padding-right: 28px;
  letter-spacing: var(--yst-letter-spacing);
}
.ai-faq-item > summary::-webkit-details-marker { display: none; }
.ai-faq-item > summary::after {
  content: "";
  position: absolute;
  right: 6px; top: 50%;
  width: 8px; height: 8px;
  border-right: 2px solid var(--yst-text-muted);
  border-bottom: 2px solid var(--yst-text-muted);
  transform: translateY(-75%) rotate(45deg);
  transition: transform .2s ease;
}
.ai-faq-item[open] > summary::after {
  transform: translateY(-25%) rotate(-135deg);
}
.ai-faq-body {
  margin-top: 8px;
  font: 13px/1.7 var(--yst-font);
  color: var(--yst-text-muted);
  letter-spacing: var(--yst-letter-spacing);
}

.ai-related-card { padding: 14px 16px; }
.ai-related-list { list-style: none; padding: 0; margin: 0; }
.ai-related-list li { margin: 6px 0; }
.ai-related-list a {
  color: var(--yst-text);
  text-decoration: none;
  font: 14px/1.6 var(--yst-font);
  border-bottom: 1px dashed transparent;
  transition: color .15s, border-color .15s;
}
.ai-related-list a:hover {
  color: var(--yst-brand);
  border-bottom-color: var(--yst-brand);
}

/* ------- 暗色模式微调 ------- */
[data-yst-theme="dark"] .ai-chat-msg-bubble {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.08);
}
[data-yst-theme="dark"] .ai-chat-msg[data-role="user"] .ai-chat-msg-bubble {
  background: var(--yst-brand);
  border-color: var(--yst-brand);
}
[data-yst-theme="dark"] .ai-chat-suggestion {
  background: rgba(255,255,255,.04);
}
[data-yst-theme="dark"] .ai-chat-msg[data-role="assistant"] .ai-chat-msg-bubble.is-error {
  background: rgba(185,28,28,.12);
  color: #fca5a5;
  border-color: rgba(248,113,113,.2);
}

/* ------- 移动端 ------- */
@media (max-width: 640px) {
  .ai-chat-body { padding: 16px 12px; min-height: 340px; }
  .ai-chat-input-wrap { padding: 10px 12px; }
  .ai-chat-msg-bubble { max-width: 88%; }
}

/* =========================================================
 * TTS 工具表单
 * ========================================================= */
.tts-card { padding: 22px 22px 24px; }
.tts-form { display: flex; flex-direction: column; gap: 14px; }

.tts-field { display: flex; flex-direction: column; gap: 6px; }
.tts-field-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font: 600 13px/1.4 var(--yst-font);
  color: var(--yst-text);
  letter-spacing: var(--yst-letter-spacing);
}
.tts-field-meta {
  font: 12px/1 var(--yst-font);
  color: var(--yst-text-muted);
  font-style: normal;
  font-variant-numeric: tabular-nums;
}
.tts-field textarea,
.tts-field select {
  width: 100%;
  padding: 10px 12px;
  font: 14px/1.7 var(--yst-font);
  color: var(--yst-text);
  background: var(--yst-bg-card);
  border: 1px solid var(--yst-border);
  border-radius: 10px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  letter-spacing: var(--yst-letter-spacing);
}
.tts-field textarea {
  resize: vertical;
  min-height: 130px;
  font-family: var(--yst-font);
}
.tts-field textarea:focus,
.tts-field select:focus {
  border-color: var(--yst-brand);
  box-shadow: 0 0 0 3px rgba(16,185,129,.12);
}
.tts-field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

.tts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 640px) {
  .tts-row { grid-template-columns: 1fr; }
}

.tts-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.tts-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font: 600 14px/1 var(--yst-font);
  color: #fff;
  background: var(--yst-brand);
  border: 1px solid var(--yst-brand);
  border-radius: 10px;
  cursor: pointer;
  transition: all .15s ease;
  letter-spacing: var(--yst-letter-spacing);
}
.tts-btn-primary:hover:not(:disabled) {
  background: var(--yst-brand-hover);
  border-color: var(--yst-brand-hover);
  transform: translateY(-1px);
}
.tts-btn-primary:disabled {
  background: var(--yst-border);
  border-color: var(--yst-border);
  cursor: not-allowed;
}
.tts-btn-primary.is-loading {
  position: relative;
  color: transparent;
}
.tts-btn-primary.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: ttsSpin .8s linear infinite;
}
@keyframes ttsSpin { to { transform: rotate(360deg); } }

.tts-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  font: 500 13px/1 var(--yst-font);
  color: var(--yst-text);
  background: transparent;
  border: 1px solid var(--yst-border);
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  transition: all .15s ease;
}
.tts-btn-ghost:hover {
  color: var(--yst-brand);
  border-color: var(--yst-brand);
  background: rgba(16,185,129,.05);
}

.tts-hint {
  font: 13px/1.5 var(--yst-font);
  color: var(--yst-text-muted);
  letter-spacing: var(--yst-letter-spacing);
  min-height: 20px;
}
.tts-hint[data-state="error"]   { color: #b91c1c; }
.tts-hint[data-state="success"] { color: var(--yst-brand); }
.tts-hint[data-state="loading"] { color: var(--yst-text); }

.tts-result {
  margin-top: 18px;
  padding: 16px;
  background: var(--yst-bg-subtle);
  border: 1px solid var(--yst-border);
  border-radius: 12px;
}
.tts-result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.tts-result-meta { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.tts-result-title {
  font: 600 14px/1.4 var(--yst-font);
  color: var(--yst-text);
  letter-spacing: var(--yst-letter-spacing);
  word-break: break-word;
}
.tts-result-sub {
  font: 12px/1.3 var(--yst-font);
  color: var(--yst-text-muted);
}
.tts-audio { width: 100%; }

[data-yst-theme="dark"] .tts-field textarea,
[data-yst-theme="dark"] .tts-field select,
[data-yst-theme="dark"] .tts-field input {
  background: rgba(255,255,255,.04);
}
[data-yst-theme="dark"] .tts-result {
  background: rgba(255,255,255,.03);
}

/* =========================================================
 * 图像提示词生成器
 * ========================================================= */
.ipg-card { padding: 22px 22px 24px; }
.ipg-form { display: flex; flex-direction: column; gap: 14px; }

.tts-field input {
  width: 100%;
  padding: 10px 12px;
  font: 14px/1.7 var(--yst-font);
  color: var(--yst-text);
  background: var(--yst-bg-card);
  border: 1px solid var(--yst-border);
  border-radius: 10px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  letter-spacing: var(--yst-letter-spacing);
}
.tts-field input:focus {
  border-color: var(--yst-brand);
  box-shadow: 0 0 0 3px rgba(16,185,129,.12);
}

.ipg-result {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ipg-result-block {
  background: var(--yst-bg-subtle);
  border: 1px solid var(--yst-border);
  border-radius: 12px;
  padding: 14px 16px;
}
.ipg-result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.ipg-result-title {
  font: 700 13px/1.4 var(--yst-font);
  color: var(--yst-text);
  letter-spacing: var(--yst-letter-spacing);
}
.ipg-result-body {
  font: 14px/1.8 var(--yst-font);
  color: var(--yst-text);
  letter-spacing: var(--yst-letter-spacing);
  word-break: break-word;
}
.ipg-result-pre {
  margin: 0;
  white-space: pre-wrap;
  font-family: var(--yst-font);
  font-size: 13px;
  line-height: 1.8;
  color: var(--yst-text);
}

.ipg-examples {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--yst-border);
}
.ipg-examples-label {
  font: 600 12px/1.5 var(--yst-font);
  color: var(--yst-text-muted);
  margin-bottom: 8px;
  letter-spacing: var(--yst-letter-spacing);
}
.ipg-examples-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

[data-yst-theme="dark"] .ipg-result-block {
  background: rgba(255,255,255,.03);
}