:root{--bg:#16161a;--panel:#1d1d22;--panel2:#25252c;--fg:#ececf1;--muted:#8e8e99;--border:#2e2e36;--accent:#e8c547;--user:#2d2d36;--err:#ff6b6b;
--safe-t:env(safe-area-inset-top,0px);--safe-b:env(safe-area-inset-bottom,0px)}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Sukhumvit Set","Segoe UI",sans-serif;-webkit-text-size-adjust:100%}
.hidden{display:none!important}
.muted{color:var(--muted)}
button{font:inherit;color:inherit;cursor:pointer}
.ghost{background:none;border:0;padding:6px 10px;border-radius:8px;font-size:18px;color:var(--muted)}
.ghost:active{background:var(--panel2)}
.login{display:flex;align-items:center;justify-content:center;height:100%;padding:24px}
.login form{width:100%;max-width:340px;display:flex;flex-direction:column;gap:12px;text-align:center}
.login-logo{width:72px;height:72px;border-radius:18px;margin:0 auto}
.login h1{margin:4px 0 0;font-size:22px}
.login input{background:var(--panel);border:1px solid var(--border);color:var(--fg);border-radius:10px;padding:12px;font-size:16px}
.login button{background:var(--accent);color:#111;border:0;border-radius:10px;padding:12px;font-weight:600}
.err{color:var(--err);min-height:1.2em;margin:0}
.app{display:flex;height:100%;padding-top:var(--safe-t)}
.side{width:330px;flex:none;border-right:1px solid var(--border);display:flex;flex-direction:column;background:var(--panel)}
.side-head,.chat-head{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--border);min-height:56px}
.brand{font-weight:700;font-size:18px;flex:1}
.list{overflow-y:auto;flex:1;padding-bottom:var(--safe-b);-webkit-overflow-scrolling:touch}
.sec{font-size:11px;letter-spacing:.08em;color:var(--muted);padding:14px 14px 6px;display:flex;justify-content:space-between}
.bot{display:flex;gap:10px;padding:9px 12px;margin:0 6px;border-radius:10px;cursor:pointer;align-items:center}
.bot:active,.bot.active{background:var(--panel2)}
.avatar{width:42px;height:42px;border-radius:12px;object-fit:cover;flex:none;background:var(--panel2)}
.avatar.sm{width:32px;height:32px;border-radius:9px}
.bot-body{min-width:0;flex:1}
.bot-top{display:flex;gap:6px;align-items:baseline}
.bot-name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}
.bot-time{font-size:12px;color:var(--muted);flex:none}
.bot-prev{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block;animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.3}}
.chat{flex:1;display:flex;flex-direction:column;min-width:0}
.chat-title{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.25}
.chat-title b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-title span{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.back{display:none;font-size:28px;line-height:1;padding:2px 10px}
.msgs{flex:1;overflow-y:auto;padding:16px 18px;-webkit-overflow-scrolling:touch}
.empty{text-align:center;margin-top:30vh}
.more{display:block;margin:0 auto 12px;background:var(--panel2);border:0;border-radius:8px;padding:6px 14px;color:var(--muted);font-size:13px}
.msg{max-width:780px;margin:0 auto 14px}
.msg.user .bubble{background:var(--user);border-radius:14px;padding:9px 13px;margin-left:auto;width:fit-content;max-width:85%;white-space:pre-wrap;word-break:break-word}
.msg.assistant .bubble{word-break:break-word}
.msg .ts{font-size:11px;color:var(--muted);margin-top:3px}
.msg.user .ts{text-align:right}
.bubble p{margin:.45em 0}
.bubble pre{background:#0f0f12;border:1px solid var(--border);border-radius:8px;padding:10px;overflow-x:auto;font-size:13px}
.bubble code{font-family:ui-monospace,Menlo,monospace;font-size:.9em;background:#0f0f12;padding:1px 4px;border-radius:4px}
.bubble pre code{background:none;padding:0}
.bubble table{border-collapse:collapse;display:block;overflow-x:auto;font-size:14px}
.bubble th,.bubble td{border:1px solid var(--border);padding:5px 8px;text-align:left}
.bubble a{color:var(--accent)}
.bubble img{max-width:100%;border-radius:8px}
.bubble blockquote{border-left:3px solid var(--border);margin:.5em 0;padding-left:10px;color:var(--muted)}
.tools{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0}
.tool{font-size:12px;background:var(--panel2);border-radius:20px;padding:2px 9px;color:var(--muted)}
.tool.run{color:var(--accent)}
.tool.bad{color:var(--err)}
.typing{color:var(--muted);font-size:13px}
.composer{border-top:1px solid var(--border);padding:8px 10px calc(8px + var(--safe-b));background:var(--bg)}
.composer .row{display:flex;gap:6px;align-items:flex-end;max-width:820px;margin:0 auto}
.composer textarea{flex:1;resize:none;background:var(--panel);color:var(--fg);border:1px solid var(--border);border-radius:18px;padding:9px 14px;font:inherit;font-size:16px;max-height:40vh;outline:none}
.send{width:38px;height:38px;border-radius:50%;border:0;background:var(--accent);color:#111;font-size:18px;font-weight:700;flex:none}
.send:disabled{opacity:.4}
.file{font-size:22px;padding:4px 10px}
.attach{max-width:820px;margin:0 auto 6px;display:flex;gap:6px}
.attach .chip{position:relative}
.attach img{height:64px;border-radius:8px}
.attach button{position:absolute;top:-6px;right:-6px;border:0;border-radius:50%;width:22px;height:22px;background:#000;color:#fff;font-size:12px}
@media (max-width:760px){
  .side{width:100%;border-right:0}
  .app.in-chat .side{display:none}
  .app:not(.in-chat) .chat{display:none}
  .back{display:block}
  .msgs{padding:12px}
}