/* ===== Ukij Esliye 字体 - 维吾尔文字体 ===== */
@font-face {
  font-family: "UKIJ Esliye";
  src: url("../fonts/Ukijes.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* ===== 全局变量 ===== */
:root {
  --bg-gradient: linear-gradient(135deg, #0f0c29 0%, #1a1a2e 40%, #16213e 100%);
  --bg-sidebar: rgba(15, 12, 41, 0.85);
  --bg-main: rgba(22, 33, 62, 0.6);
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.1);
  --bg-input: rgba(255, 255, 255, 0.06);
  --bg-bubble-user: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-bubble-ai: rgba(255, 255, 255, 0.08);
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;
  --accent: #667eea;
  --accent-glow: rgba(102, 126, 234, 0.4);
  --accent-2: #764ba2;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 24px var(--accent-glow);
  --font-uyghur: "UKIJ Esliye", "UKIJ Tuz Gezit", "SUKUMAR", "Alkatip", "Noto Naskh Arabic", serif;
  --font-chinese: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-chinese);
  background: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 维吾尔文文本使用 UKIJ Esliye 字体 */
[lang="ug"],
[class*="-ug"],
[class*="lang-btn"][data-lang="ug"],
.uyghur-text {
  font-family: var(--font-uyghur);
}

/* ===== App 布局 ===== */
.app {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ===== 登录遮罩层 ===== */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 20% 30%, rgba(99, 102, 241, 0.18), transparent 55%),
              radial-gradient(ellipse at 80% 70%, rgba(139, 92, 246, 0.15), transparent 55%),
              var(--bg-gradient);
  background-color: #0f0c29;
  backdrop-filter: blur(8px);
  transition: opacity 0.4s ease, visibility 0.4s;
}

.login-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.login-card {
  width: min(400px, calc(100vw - 40px));
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px 28px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 40px var(--accent-glow);
  backdrop-filter: blur(20px);
  animation: loginIn 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

@keyframes loginIn {
  from { opacity: 0; transform: translateY(24px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.login-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.login-title-ug {
  font-family: var(--font-uyghur);
  font-size: 20px;
  color: var(--text-primary);
}

.login-title-zh {
  font-size: 14px;
  color: var(--text-muted);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-field input {
  width: 100%;
  padding: 13px 16px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-sizing: border-box;
}

.login-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.code-row {
  display: flex;
  gap: 10px;
}

.code-row input { flex: 1; }

.send-code-btn {
  flex-shrink: 0;
  padding: 0 16px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.send-code-btn:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
}

.send-code-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.login-btn {
  margin-top: 4px;
  padding: 13px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.login-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.login-msg {
  min-height: 18px;
  font-size: 13px;
  text-align: center;
  color: #f87171;
}

.login-msg.success { color: #4ade80; }

/* 退出登录按钮 */
.logout-btn {
  margin: 12px 16px 16px;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  transition: all var(--transition);
}

.logout-btn:hover {
  border-color: #ef4444;
  color: #ef4444;
}

.user-phone {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

/* ===== 侧边栏 ===== */
.sidebar {
  width: 280px;
  background: var(--bg-sidebar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
  z-index: 100;
}

.sidebar-header {
  padding: 24px 20px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== Suynar 标志动画 ===== */
.suynar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.logo-orbit {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-orbit.large {
  width: 64px;
  height: 64px;
}

.logo-core {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  z-index: 3;
  animation: corePulse 2s ease-in-out infinite;
}

.logo-orbit.large .logo-core {
  width: 32px;
  height: 32px;
  font-size: 16px;
}

@keyframes corePulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 8px rgba(139, 92, 246, 0.6); }
  50% { transform: scale(1.1); box-shadow: 0 0 20px rgba(139, 92, 246, 0.9); }
}

.logo-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid transparent;
  animation: orbitSpin linear infinite;
}

.ring-1 {
  width: 28px;
  height: 28px;
  border-top-color: #6366f1;
  animation-duration: 3s;
}

.ring-2 {
  width: 36px;
  height: 36px;
  border-right-color: #8b5cf6;
  animation-duration: 4s;
  animation-direction: reverse;
}

.ring-3 {
  width: 44px;
  height: 44px;
  border-bottom-color: #a78bfa;
  animation-duration: 5s;
  opacity: 0.6;
}

.logo-orbit.large .ring-1 { width: 44px; height: 44px; animation-duration: 4s; }
.logo-orbit.large .ring-2 { width: 56px; height: 56px; animation-duration: 5s; }
.logo-orbit.large .ring-3 { width: 68px; height: 68px; animation-duration: 6s; }

@keyframes orbitSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.logo-text {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: textShimmer 3s ease-in-out infinite;
}

.logo-text-ug {
  font-family: var(--font-uyghur);
  font-size: 18px;
  color: var(--accent);
  opacity: 0.8;
  animation: textFade 3s ease-in-out infinite alternate;
}

@keyframes textShimmer {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.2); }
}

@keyframes textFade {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}

/* 欢迎页大图标 */
.suynar-welcome-icon {
  margin-bottom: 20px;
}

/* 新建对话按钮 */
.new-chat-btn {
  margin: 8px 16px 16px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
  box-shadow: 0 4px 16px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.new-chat-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.new-chat-btn:hover::before { opacity: 1; }
.new-chat-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 24px var(--accent-glow); }
.new-chat-btn:active { transform: translateY(0); }

.btn-icon { font-size: 18px; font-weight: bold; }
.btn-text-zh { font-family: var(--font-chinese); }
.btn-text-ug {
  font-family: var(--font-uyghur);
  margin-left: auto;
  font-size: 13px;
  opacity: 0.85;
}

/* 对话历史 */
.chat-history {
  flex: 1;
  overflow-y: auto;
  padding: 0 12px 12px;
}

.chat-history::-webkit-scrollbar { width: 6px; }
.chat-history::-webkit-scrollbar-track { background: transparent; }
.chat-history::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.history-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

/* 侧边栏底部 */
.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 16px;
}

.settings { display: flex; flex-direction: column; gap: 8px; }

.toggle-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

.toggle-label-ug {
  font-family: var(--font-uyghur);
  direction: rtl;
}

/* 语言切换按钮组 */
.lang-switch {
  display: flex;
  gap: 4px;
  background: var(--bg-input);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.lang-btn {
  flex: 1;
  padding: 6px 10px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn[data-lang="ug"] { font-family: var(--font-uyghur); direction: rtl; }

.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* ===== 主聊天区 ===== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-main);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.main-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.main-title {
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.title-ug {
  font-family: var(--font-uyghur);
  direction: rtl;
  color: var(--accent);
}

.title-zh { color: var(--text-secondary); font-weight: 400; }

.status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
}

.status-badge.thinking .status-dot { background: #fbbf24; box-shadow: 0 0 8px rgba(251, 191, 36, 0.6); }
.status-badge.error .status-dot { background: #ef4444; box-shadow: 0 0 8px rgba(239, 68, 68, 0.6); }

/* 消息区 */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 24px 8px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.messages::-webkit-scrollbar { width: 8px; }
.messages::-webkit-scrollbar-track { background: transparent; }
.messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.messages::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* 欢迎卡片 */
.welcome-card {
  max-width: 700px;
  margin: auto;
  text-align: center;
  padding: 40px 20px;
}

.welcome-icon {
  font-size: 48px;
  color: var(--accent);
  text-shadow: 0 0 24px var(--accent-glow);
  margin-bottom: 20px;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.welcome-card h2 {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 20px;
  margin-bottom: 32px;
}

.welcome-ug {
  font-family: var(--font-uyghur);
  direction: rtl;
  color: var(--text-primary);
}

.welcome-zh { color: var(--text-secondary); font-weight: 400; }

.welcome-suggestions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
}

.suggestion-card {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}

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

.sug-ug {
  font-family: var(--font-uyghur);
  direction: rtl;
  font-size: 15px;
  color: var(--accent);
}

.sug-zh { font-size: 13px; color: var(--text-secondary); }

/* 消息气泡 */
.message {
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  gap: 12px;
  animation: slideIn 0.4s var(--transition);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.message.user .message-avatar {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
}

.message.ai .message-avatar {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  border: 1px solid var(--accent);
  color: var(--accent);
}

.message-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.message-role {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* AI 消息操作按钮组 */
.msg-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 朗读 / 复制按钮（共用样式） */
.speak-btn,
.copy-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3px 10px;
  font-size: 11px;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition);
  font-family: var(--font-chinese);
}

.speak-btn:hover,
.copy-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* 复制成功反馈 */
.copy-btn.copied {
  color: #4ade80;
  border-color: #4ade80;
  background: rgba(74, 222, 128, 0.15);
}

.speak-btn.speaking {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  animation: speakPulse 1.5s ease-in-out infinite;
}

@keyframes speakPulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 0 6px transparent; }
}

/* 语音输入按钮 */
.voice-btn {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: none;
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}

.voice-btn:hover {
  background: var(--bg-card-hover);
  color: var(--accent);
}

.voice-btn.recording {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
  animation: voicePulse 1.5s ease-in-out infinite;
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.6);
}

@keyframes voicePulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 16px rgba(239, 68, 68, 0.6); }
  50% { transform: scale(1.08); box-shadow: 0 0 24px rgba(239, 68, 68, 0.8); }
}

/* 图片预览区（输入框上方） */
.image-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 4px;
  margin-top: 4px;
}

.image-preview-item {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-preview-item .remove-img {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
}

.image-preview-item .remove-img:hover {
  background: #ef4444;
}

/* 用户消息里的图片 */
.bubble .msg-image {
  max-width: 240px;
  max-height: 240px;
  border-radius: 10px;
  margin-top: 8px;
  display: block;
  border: 1px solid var(--border);
}

.message.user .message-role { color: #a5b4fc; }
.message.ai .message-role { color: var(--accent); }

.bubble {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.7;
  word-break: break-word;
  white-space: pre-wrap;
}

.message.user .bubble {
  background: var(--bg-bubble-user);
  color: #fff;
  border-radius: var(--radius) var(--radius) 4px var(--radius);
}

.message.ai .bubble {
  background: var(--bg-bubble-ai);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) var(--radius) 4px;
}

/* 维吾尔文消息气泡 */
.bubble.uyghur {
  font-family: var(--font-uyghur);
  direction: rtl;
  text-align: right;
}

/* 代码块 */
.bubble pre {
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow-x: auto;
  margin: 8px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  position: relative;
}

.bubble pre code {
  font-family: var(--font-mono);
  font-size: 13px;
}

/* 代码块复制按钮 */
.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 5px 9px;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-family: var(--font-chinese);
  transition: all var(--transition);
  opacity: 0;
}

.bubble pre:hover .code-copy-btn {
  opacity: 1;
}

.code-copy-btn:hover {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent);
}

.code-copy-btn.copied {
  color: #4ade80;
  border-color: #4ade80;
  background: rgba(74, 222, 128, 0.15);
  opacity: 1;
}

.bubble code {
  font-family: var(--font-mono);
  font-size: 13px;
}

.bubble p { margin-bottom: 8px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble ul, .bubble ol { padding-left: 20px; margin-bottom: 8px; }

/* Typing indicator */
.typing-indicator {
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  color: var(--text-muted);
  font-size: 13px;
}

.typing-dots { display: flex; gap: 4px; }

.typing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: typingBounce 1.4s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-8px); opacity: 1; }
}

.typing-ug { font-family: var(--font-uyghur); direction: rtl; }

/* 输入区 */
.input-area {
  padding: 16px 24px 20px;
  border-top: 1px solid var(--border);
  background: rgba(15, 12, 41, 0.4);
}

.input-wrapper {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 8px 8px 18px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input-wrapper:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.user-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.5;
  resize: none;
  max-height: 160px;
  padding: 8px 0;
  font-family: inherit;
}

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

.send-btn {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.send-btn:hover { transform: scale(1.05); }
.send-btn:active { transform: scale(0.95); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.input-hint {
  max-width: 760px;
  margin: 8px auto 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  justify-content: center;
  gap: 16px;
}

.hint-ug { font-family: var(--font-uyghur); direction: rtl; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    transform: translateX(-100%);
    width: 260px;
  }

  .sidebar.open { transform: translateX(0); }

  .menu-toggle { display: flex; }

  .welcome-suggestions { grid-template-columns: 1fr; }

  .main-header { padding: 12px 16px; }

  .messages { padding: 16px; }

  .input-area { padding: 12px 16px 16px; }

  .title-zh { display: none; }
}

/* ===== 选中文本样式 ===== */
::selection {
  background: var(--accent);
  color: #fff;
}

/* ===== 背景装饰 ===== */
.main::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.3;
}

.main::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(118, 75, 162, 0.2) 0%, transparent 70%);
  pointer-events: none;
}