/* LLM Chat 独立服务 —— 深色主题（排版照旧 MFT chat 页风格） */
:root {
  --bg: #0d1117; --bg2: #161b22; --bg3: #1c2333;
  --line: #2d333b; --text: #e6edf3; --muted: #8b949e;
  --accent: #3fb950; --accent2: #58a6ff; --warn: #d29922; --danger: #f85149;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 14px; line-height: 1.6; }
header { position: sticky; top: 0; z-index: 10; background: var(--bg2); border-bottom: 1px solid var(--line); padding: 10px 20px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.brand { font-size: 18px; font-weight: 700; color: var(--accent2); }
.brand .sub { font-size: 12px; color: var(--muted); font-weight: 400; margin-left: 8px; }
main { max-width: 1080px; margin: 0 auto; padding: 20px; }
footer { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; border-top: 1px solid var(--line); margin-top: 30px; }
.card { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin-bottom: 12px; }
.btn { display: inline-block; padding: 5px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg3); color: var(--text); cursor: pointer; font-size: 13px; }
.btn.ok { background: var(--accent2); border-color: var(--accent2); color: #fff; font-weight: 600; }
.btn:disabled { opacity: .5; cursor: default; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.center { text-align: center; }
.hidden { display: none; }
/* 错误提示条：位于聊天区与输入区之间，醒目可见；带 ⚠ 前缀 */
.chat-error { position: relative; background: rgba(248,81,73,.12); border: 1px solid var(--danger); color: var(--danger); border-radius: 8px; padding: 10px 14px 10px 34px; margin-bottom: 12px; font-size: 13px; white-space: pre-wrap; word-break: break-all; }
.chat-error::before { content: "⚠"; position: absolute; left: 12px; top: 10px; font-weight: 700; }

/* 黄色提醒条（非错误，如 16k 联网慎用提示），8s 后自动消失 */
.chat-warn { background: rgba(210,153,34,.12); border: 1px solid var(--warn); color: var(--warn); border-radius: 8px; padding: 8px 14px; margin-bottom: 12px; font-size: 13px; word-break: break-all; }

/* 工具栏 */
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.toolbar select { background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; font-size: 13px; }
.toolbar .btn { margin-left: auto; }
.toolbar .btn + .btn { margin-left: 6px; }   /* 多个按钮并排靠右（v20260913a：记忆 + 新对话） */
.toolbar .session-select { max-width: 300px; min-width: 150px; }

/* 对话区 */
.chat-box {
  height: calc(100vh - 300px); min-height: 320px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 10px;
  overscroll-behavior: contain; scrollbar-width: thin;
}
.chat-box::-webkit-scrollbar { width: 8px; }
.chat-box::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
.chat-row { display: flex; }
.chat-row.user { justify-content: flex-end; }
.chat-row.ai { justify-content: flex-start; }
.chat-bubble { max-width: min(82%, 760px); padding: 10px 14px; border-radius: 12px; line-height: 1.7; overflow-wrap: break-word; }
.chat-bubble.user { background: var(--accent2); color: #fff; border-bottom-right-radius: 3px; }
.chat-bubble.ai { background: var(--bg); border: 1px solid var(--line); border-bottom-left-radius: 3px; }
.chat-bubble.ai pre { background: var(--bg3); padding: 10px; border-radius: 8px; overflow: auto; margin: 8px 0; }
.chat-bubble.ai code { font-family: "SF Mono", Consolas, monospace; font-size: 12px; }
.chat-bubble.ai blockquote { border-left: 3px solid var(--accent2); padding-left: 10px; color: var(--muted); margin: 8px 0; }

/* 回复头部行：模型名在左、时间与复制按钮在右上角 */
.chat-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 6px; }
.chat-model { font-size: 11px; opacity: .8; }
.chat-head-right { display: flex; align-items: center; gap: 8px; }
.chat-time { font-size: 10px; opacity: .65; white-space: nowrap; }
.chat-time.usr { display: block; text-align: right; margin-top: 3px; color: rgba(255,255,255,.7); opacity: .8; }
.chat-copy {
  font-size: 11px; padding: 1px 8px; border-radius: 6px; white-space: nowrap;
  background: transparent; border: 1px solid var(--line); color: var(--muted); cursor: pointer;
}
.chat-copy:hover { border-color: var(--accent2); color: var(--text); }
.chat-copy:disabled { opacity: .6; cursor: default; }

/* 气泡内 Markdown 标准排版 */
.chat-body { overflow-wrap: break-word; }
.chat-body > :first-child { margin-top: 0; }
.chat-body > :last-child { margin-bottom: 0; }
.chat-body p { margin: 6px 0; }
.chat-body h1, .chat-body h2, .chat-body h3, .chat-body h4, .chat-body h5, .chat-body h6 { margin: 14px 0 8px; line-height: 1.4; }
.chat-body h1 { font-size: 17px; } .chat-body h2 { font-size: 15px; } .chat-body h3 { font-size: 14px; }
.chat-body h4, .chat-body h5, .chat-body h6 { font-size: 13px; }
.chat-body ul, .chat-body ol { padding-left: 22px; margin: 8px 0; }
.chat-body li { margin: 3px 0; }
.chat-body li > ul, .chat-body li > ol { margin: 3px 0; }
.chat-body hr { border: none; border-top: 1px solid var(--line); margin: 12px 0; }
.chat-body img { max-width: 100%; border-radius: 6px; }
.chat-body a { color: var(--accent2); }
.chat-body table { margin: 8px 0; display: block; overflow-x: auto; width: 100%; border-collapse: collapse; }
.chat-body table th, .chat-body table td { border: 1px solid var(--line); padding: 4px 10px; white-space: normal; }
.chat-body table th { background: var(--bg3); }
.chat-body code { padding: 1px 5px; background: var(--bg3); border-radius: 4px; }
.chat-body pre { overflow-x: auto; }
.chat-body pre code { padding: 0; background: transparent; }

/* 输入区 */
.chat-composer { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.composer-side { display: flex; flex-direction: column; gap: 8px; }
.composer-side .btn { min-width: 88px; }
.chat-composer textarea {
  flex: 1; resize: vertical; min-height: 76px; max-height: 180px;
  background: var(--bg); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 12px; font: inherit; line-height: 1.6;
}
.chat-composer textarea:focus { outline: none; border-color: var(--accent2); }

/* 本轮消耗展示（v20260916a）：输入框下方独占一行 */
.chat-usage { flex-basis: 100%; padding: 2px 4px 0; line-height: 1.6; }

/* 🔍 联网开关（开 = 绿色高亮） */
#web-toggle.on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

/* 回复头部的联网标记 */
.chat-web { font-size: 10px; cursor: default; }

/* 长期记忆面板（v20260913a）：🧠 记忆按钮展开；每模型独立，可逐条删除 */
#mem-panel { padding: 10px 14px; }
.mem-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.mem-head b { font-size: 13px; }
.mem-head .btn { margin-left: auto; }
.mem-row { display: flex; align-items: flex-start; gap: 8px; padding: 6px 0; border-top: 1px dashed var(--line); font-size: 13px; }
.mem-id { flex: none; min-width: 96px; }
.mem-text { flex: 1; white-space: pre-wrap; word-break: break-word; }
.mem-row .btn { flex: none; }