* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f0f2f5;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.chat-container {
  width: 420px;
  height: 700px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  flex-shrink: 0;
}

.header-info {
  flex: 1;
}

.header-name {
  font-size: 16px;
  font-weight: 600;
}

.header-status {
  font-size: 12px;
  opacity: 0.85;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  display: inline-block;
  transition: background 0.5s ease;
}

.mood-tag {
  display: none;
  font-size: 10px;
  padding: 1px 6px;
  border: 1px solid;
  border-radius: 8px;
  margin-left: 4px;
  opacity: 0.9;
  transition: all 0.5s ease;
}

.btn-clear {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: #fff;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.2s;
}

.btn-clear:hover {
  background: rgba(255, 255, 255, 0.35);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.intimacy-badge {
  font-size: 10px;
  padding: 2px 8px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.8);
  transition: all 0.5s ease;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #f8f9fb;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: #ddd;
  border-radius: 2px;
}

.welcome {
  text-align: center;
  color: #999;
  font-size: 14px;
  margin: auto;
  padding: 40px 0;
}

.message {
  display: flex;
  gap: 8px;
  max-width: 85%;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

.msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.msg-bubble {
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.6;
  word-break: break-word;
}

.message-user .msg-bubble {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message-assistant .msg-bubble {
  background: #fff;
  color: #333;
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.error-text {
  color: #ef4444;
}

.system-notice {
  text-align: center;
  color: #aaa;
  font-size: 12px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 6px;
  align-self: center;
  animation: fadeIn 0.3s ease;
}

.typing-bubble {
  min-width: 60px;
  min-height: 36px;
}

.typing-dots {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}

.typing-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #aaa;
  animation: typingBounce 1.2s infinite;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

.skill-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  font-size: 12px;
  color: #8b5cf6;
  background: #f5f3ff;
  flex-shrink: 0;
}

.skill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #8b5cf6;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.chat-input-area {
  padding: 12px 16px;
  border-top: 1px solid #eee;
  background: #fff;
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

#messageInput {
  flex: 1;
  border: 1px solid #e0e0e0;
  border-radius: 20px;
  padding: 10px 16px;
  font-size: 14px;
  outline: none;
  resize: none;
  line-height: 1.5;
  font-family: inherit;
  transition: border-color 0.2s;
  max-height: 120px;
}

#messageInput:focus {
  border-color: #667eea;
}

.btn-send {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.2s;
  font-size: 16px;
}

.btn-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-send::after {
  content: '➤';
}

.input-hint {
  font-size: 11px;
  color: #bbb;
  margin-top: 4px;
  padding-left: 4px;
}

@media (max-width: 480px) {
  .chat-container {
    width: 100%;
    height: 100vh;
    border-radius: 0;
  }
}