:root{--bg:#0d0f12;--bg-2:#15181d;--bg-3:#1c2026;--panel:#131619;--border:#262b33;--text:#e7e9ee;--text-dim:#9aa3b2;--text-faint:#6b7280;--accent:#7c8cff;--accent-2:#5563e8;--user-bubble:#232a4d;--tool-bg:#11161b;--tool-border:#2a3a30;--tool-accent:#5fd49b;--danger:#e5685f;--radius:14px;--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;--sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{background:var(--bg);color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}.login-wrap{height:100dvh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:360px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;text-align:center}.login-card h1{font-size:22px;margin:6px 0 4px;letter-spacing:-.01em}.login-card p{color:var(--text-dim);font-size:13.5px;margin:0 0 20px}.login-card .mark{width:46px;height:46px;margin:0 auto 14px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:22px;color:#fff}.field{width:100%;background:var(--bg-3);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:11px 13px;font-size:15px;outline:none}.field:focus{border-color:var(--accent)}.btn{width:100%;margin-top:12px;background:var(--accent-2);color:#fff;border:none;border-radius:10px;padding:11px;font-size:15px;font-weight:600;cursor:pointer}.btn:hover{background:var(--accent)}.btn:disabled{opacity:.55;cursor:default}.login-err{color:var(--danger);font-size:13px;margin-top:12px;min-height:16px}.shell{display:flex;height:100dvh;overflow:hidden}.sidebar{width:268px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-head{padding:14px;border-bottom:1px solid var(--border)}.new-chat{width:100%;background:var(--bg-3);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:10px 12px;font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:8px;justify-content:center}.new-chat:hover{border-color:var(--accent)}.conv-list{flex:1 1;overflow-y:auto;padding:8px}.conv{display:flex;align-items:center;gap:6px;padding:9px 10px;border-radius:8px;cursor:pointer;color:var(--text-dim);font-size:13.5px}.conv:hover{background:var(--bg-2);color:var(--text)}.conv.active{background:var(--bg-3);color:var(--text)}.conv-title{flex:1 1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-del{opacity:0;background:none;border:none;color:var(--text-faint);cursor:pointer;font-size:15px;padding:0 2px;line-height:1}.conv:hover .conv-del{opacity:1}.conv-del:hover{color:var(--danger)}.sidebar-foot{padding:11px 14px;border-top:1px solid var(--border);font-size:11.5px;color:var(--text-faint);display:flex;align-items:center;justify-content:space-between}.dot{width:7px;height:7px;border-radius:50%;background:var(--tool-accent);display:inline-block;margin-right:6px}.main{flex:1 1;display:flex;flex-direction:column;min-width:0}.topbar{height:52px;flex-shrink:0;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;padding:0 18px;font-weight:600;font-size:15px}.topbar .sub{color:var(--text-faint);font-weight:400;font-size:12.5px}.menu-btn{display:none;background:none;border:none;color:var(--text);font-size:20px;cursor:pointer}.scroll{flex:1 1;overflow-y:auto}.thread{max-width:760px;margin:0 auto;padding:26px 20px 40px}.empty{height:100%;min-height:50vh;flex-direction:column;color:var(--text-dim);text-align:center;gap:8px}.empty,.empty .big{display:flex;align-items:center;justify-content:center}.empty .big{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent-2));font-weight:700;font-size:26px;color:#fff;margin-bottom:6px}.empty h2{color:var(--text);margin:0;font-size:19px}.msg{display:flex;gap:13px;padding:16px 0}.avatar{width:28px;height:28px;border-radius:7px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff}.avatar.user{background:#3a425e}.avatar.assistant{background:linear-gradient(135deg,var(--accent),var(--accent-2))}.msg-body{flex:1 1;min-width:0;padding-top:2px}.msg-role{font-size:12px;color:var(--text-faint);margin-bottom:3px;font-weight:600}.msg-content{white-space:pre-wrap;word-wrap:break-word}.msg-content code.inline{background:var(--bg-3);border:1px solid var(--border);padding:1px 5px;border-radius:5px}.codeblock,.msg-content code.inline{font-family:var(--mono);font-size:13px}.codeblock{background:#0a0c0f;border:1px solid var(--border);border-radius:10px;padding:12px 14px;margin:10px 0;overflow-x:auto;white-space:pre;color:#d7e0ea}.tool{border:1px solid var(--tool-border);background:var(--tool-bg);border-radius:10px;margin:10px 0;overflow:hidden}.tool-head{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;color:var(--tool-accent);font-family:var(--mono);background:rgba(95,212,155,.05)}.tool-head,.tool-head .gear{font-size:13px}.tool-head .name{color:var(--text);font-weight:600}.tstatus{margin-left:auto;display:inline-flex;align-items:center;color:var(--tool-accent);font-size:12px}.spinner.sm{width:11px;height:11px;border-width:2px}.tool-head .chev{margin-left:10px;color:var(--text-faint);font-size:11px}.tool-args{padding:10px 12px;border-top:1px solid var(--tool-border);font-family:var(--mono);font-size:12.5px;color:var(--text-dim);white-space:pre-wrap;word-break:break-word;max-height:320px;overflow:auto}.status-pill{display:inline-flex;align-items:center;gap:8px;color:var(--text-dim);font-size:13.5px;padding:6px 0}.spinner{width:14px;height:14px;border-radius:50%;border:2px solid var(--border);border-top-color:var(--accent);animation:spin .7s linear infinite}.cursor-blink{display:inline-block;width:7px;background:var(--accent);margin-left:1px;animation:blink 1s steps(2) infinite}@keyframes spin{to{transform:rotate(1turn)}}@keyframes blink{0%,50%{opacity:1}50.01%,to{opacity:0}}.composer-wrap{border-top:1px solid var(--border);padding:14px 20px 18px}.composer{max-width:760px;margin:0 auto;display:flex;gap:10px;align-items:flex-end;background:var(--bg-3);border:1px solid var(--border);border-radius:16px;padding:8px 8px 8px 16px}.composer:focus-within{border-color:var(--accent)}.composer textarea{flex:1 1;resize:none;background:none;border:none;color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.5;outline:none;max-height:200px;padding:6px 0}.send{width:36px;height:36px;border-radius:10px;flex-shrink:0;background:var(--accent-2);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px}.send:hover{background:var(--accent)}.send:disabled{opacity:.4;cursor:default}.composer-hint{max-width:760px;margin:7px auto 0;color:var(--text-faint);font-size:11px;text-align:center}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:5;display:none}@media (max-width:720px){.sidebar{position:fixed;left:0;top:0;bottom:0;z-index:10;transform:translateX(-100%);transition:transform .2s ease}.sidebar.open{transform:translateX(0)}.menu-btn,.overlay.show{display:block}.composer,.thread{max-width:100%}}