/* 淡绿色淡黄绿色渐变清新柔和风格，移动端适配 */
:root {
  --bg-start: #d9f7be; /* 淡绿 */
  --bg-end: #f4f9d2;   /* 淡黄绿 */
  --primary: #4caf50;  /* 绿色强调 */
  --secondary: #8bc34a;
  --text: #2f3b2f;
  --muted: #6b7a6b;
  --white: #ffffff;
  --shadow: rgba(76, 175, 80, 0.2);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.chat-container {
  width: 100%;
  max-width: 720px;
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--shadow);
  overflow: hidden;
}

/* 顶部警示通知样式 */
.warning-banner {
  padding: 10px 16px;
  background: #fff8d6; /* 柔和黄色背景 */
  border: 1px solid #ffec99; /* 黄色边框 */
  border-left: 4px solid #faad14; /* 左侧强调条 */
  color: #5c4a00; /* 深色文字保证可读性 */
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 480px) {
  .warning-banner { font-size: 13px; padding: 8px 12px; }
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: linear-gradient(135deg, #eafbe6, #f9ffe6);
  border-bottom: 1px solid #e1f3d8;
}

.chat-header h2 {
  margin: 0;
  font-size: 18px;
  color: var(--primary);
}

.model-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.model-selector select {
  padding: 6px 8px;
  border: 1px solid #cfe8c9;
  border-radius: 8px;
  background: #f7fff2;
  color: var(--text);
}

.chat-box {
  height: 60vh;
  padding: 16px;
  overflow-y: auto;
  background: #fbfff5;
}

.message { display: flex; margin-bottom: 12px; gap: 8px; }
.message .bubble {
  padding: 10px 12px;
  border-radius: 12px;
  max-width: 85%;
  box-shadow: 0 2px 10px var(--shadow);
}
.message.user .bubble {
  background: #e2f7d8;
  align-self: flex-end;
}
.message.assistant .bubble {
  background: #fffef0;
}
.message.user { justify-content: flex-end; }
.message.assistant { justify-content: flex-start; }

.chat-input {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid #e1f3d8;
  background: #fafff0;
}

#user-input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid #cfe8c9;
  border-radius: 12px;
  font-size: 16px;
  background: #ffffff;
}

#send-btn {
  padding: 10px 16px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: var(--white);
  font-weight: 600;
  cursor: pointer;
}
#send-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* 模型信息面板样式 */
.model-info {
  padding: 10px 16px;
  background: #f9fff0;
  border-bottom: 1px solid #e1f3d8;
  color: var(--muted);
  font-size: 14px;
}
.model-info .name { color: var(--primary); font-weight: 600; }
.model-info .tokens { color: var(--text); font-weight: 600; margin-left: 8px; }
.model-info .about { margin-top: 6px; line-height: 1.5; }

/* 移动端优化 */
@media (max-width: 480px) {
  .chat-box { height: 62vh; }
  #user-input { font-size: 15px; }
  #send-btn { padding: 10px 14px; }
  .model-info { font-size: 13px; padding: 8px 12px; }
}

/* 全局隐藏滚动条，保留滚动效果 */
html, body {
  -ms-overflow-style: none; /* IE/旧版 Edge */
  scrollbar-width: none;    /* Firefox */
}
html::-webkit-scrollbar,
body::-webkit-scrollbar { display: none; } /* Chrome/Safari/新 Edge */

/* 隐藏所有元素滚动条（覆盖常见浏览器） */
* {
  -ms-overflow-style: none;
  scrollbar-width: none;
}
*::-webkit-scrollbar { display: none; }

/* 保持聊天框可滚动并优化移动端滚动体验 */
.chat-box { -webkit-overflow-scrolling: touch; }

/* 代码块允许横向滚动但隐藏滚动条 */
.message .bubble pre { overflow-x: auto; }
.message .bubble pre { scrollbar-width: none; -ms-overflow-style: none; }
.message .bubble pre::-webkit-scrollbar { display: none; }