:root {
  --bg:#fff; --bg-alt:#f5f4ef; --bg-input:#f7f6f1; --bg-sidebar:#f0efe9;
  --text:#1a1a17; --text-2:#8b8b82; --text-3:#b0afa6;
  --border:#e0ded6; --accent:#c96b3c; --accent-hover:#b55e32;
  --danger:#c03; --success:#2a7;
  --tool-bg:#fdfaf5; --tool-border:#ede8de; --code-bg:#f4f3ee;
  --sidebar-active:rgba(201,107,60,.1);
  --warning:#e8a33c; --error-bg:#fff0f0; --error-border:#fcc; --switch-off:#bbb;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans',Helvetica,Arial,sans-serif;
  --mono:'SF Mono',SFMono-Regular,ui-monospace,'Cascadia Code',Menlo,Consolas,monospace;
}

[data-theme="dark"] {
  --bg:#1a1a1a; --bg-alt:#232323; --bg-input:#2a2a28; --bg-sidebar:#141414;
  --text:#ddd; --text-2:#aaa; --text-3:#888;
  --border:#333; --accent:#d4803c; --accent-hover:#e08c48;
  --danger:#f55; --success:#4c9;
  --tool-bg:#1f1d1a; --tool-border:#3a3530; --code-bg:#252320;
  --sidebar-active:rgba(212,128,60,.15);
  --warning:#f0a040; --error-bg:#2a1515; --error-border:#533; --switch-off:#555;
}
[data-theme="dark"] .auth-box { background:#232323; }
[data-theme="dark"] .hljs { background:var(--code-bg); color:var(--text); }
[data-theme="dark"] .msg-content code,
[data-theme="dark"] .msg-content pre,
[data-theme="dark"] .msg-content pre code { color:var(--text); }
[data-theme="dark"] .tool-section pre { color:var(--text); }
[data-theme="dark"] .thinking-body { color:var(--text-2); }
[data-theme="dark"] .hljs-keyword,[data-theme="dark"] .hljs-selector-tag,[data-theme="dark"] .hljs-built_in{color:#c98;}
[data-theme="dark"] .hljs-string,[data-theme="dark"] .hljs-attr{color:#9b9;}
[data-theme="dark"] .hljs-comment{color:#666;}
[data-theme="dark"] .hljs-number,[data-theme="dark"] .hljs-literal{color:#9bf;}
[data-theme="dark"] .hljs-title,[data-theme="dark"] .hljs-function .hljs-title{color:#dda;}

*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;width:100%;font-family:var(--font);color:var(--text);background:var(--bg);overflow:hidden}
.screen{display:none;width:100%;height:100%}.screen.active{display:flex}

#auth-screen{align-items:center;justify-content:center;height:100vh;background:var(--bg-alt)}
.auth-box{width:100%;max-width:380px;padding:40px;background:var(--bg);border:1px solid var(--border)}
.auth-box h1{font-size:22px;font-weight:600;margin-bottom:4px}
.auth-box .sub{font-size:14px;color:var(--text-2);margin-bottom:28px}
.auth-box input{display:block;width:100%;padding:10px 12px;margin-bottom:12px;border:1px solid var(--border);background:var(--bg);font-family:var(--font);font-size:14px;color:var(--text);outline:none;transition:border-color .2s}
.auth-box input:focus{border-color:var(--accent)}
.auth-box .btn{display:block;width:100%;padding:10px;margin-top:4px;background:var(--accent);color:#fff;border:none;font-family:var(--font);font-size:14px;font-weight:500;cursor:pointer;transition:background .2s}
.auth-box .btn:hover{background:var(--accent-hover)}
.auth-box .btn:disabled{opacity:.5;cursor:not-allowed}
.auth-box .switch{margin-top:20px;font-size:13px;color:var(--text-2);text-align:center}
.auth-box .switch a{color:var(--accent);text-decoration:none;font-weight:500}
.auth-error{padding:8px 12px;margin-bottom:12px;background:var(--error-bg);border:1px solid var(--error-border);font-size:13px;color:var(--danger);display:none}

.app-layout{display:flex;width:100%;height:100%;min-height:0}

.sidebar{width:260px;min-width:260px;border-right:1px solid var(--border);background:var(--bg-sidebar);display:flex;flex-direction:column;transition:transform .25s ease}
.sidebar-head{padding:12px;border-bottom:1px solid var(--border)}
.new-chat-btn{width:100%;padding:8px 12px;border:1px solid var(--border);background:var(--bg);font-family:var(--font);font-size:13px;color:var(--text);cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .15s}
.new-chat-btn:hover{border-color:var(--accent);color:var(--accent)}
.chat-list{flex:1;overflow-y:auto;padding:6px}
.chat-list::-webkit-scrollbar{width:4px}
.chat-list::-webkit-scrollbar-thumb{background:var(--border)}
.chat-item{padding:8px 10px;margin-bottom:2px;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .15s;position:relative}
.chat-item:hover{background:var(--sidebar-active)}
.chat-item.active{background:var(--sidebar-active);border-left:2px solid var(--accent);padding-left:8px}
.chat-item-title{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-item-del{display:none;background:none;border:none;color:var(--text-3);font-size:16px;cursor:pointer;padding:0 4px;line-height:1;flex-shrink:0}
.chat-item:hover .chat-item-del{display:block}
.chat-item-del:hover{color:var(--danger)}

.main-area{flex:1;display:flex;flex-direction:column;min-width:0;height:100%}

.header{display:flex;align-items:center;justify-content:space-between;padding:0 16px;height:48px;min-height:48px;border-bottom:1px solid var(--border);background:var(--bg)}
.header-left{display:flex;align-items:center;gap:10px}
.logo{font-weight:600;font-size:15px;letter-spacing:-.3px}
.ctx-counter{font-size:11px;color:var(--text-3);font-family:var(--mono);font-weight:400}
.ctx-counter.warn{color:var(--warning)}
.ctx-counter.critical{color:var(--danger)}
.sidebar-toggle{background:none;border:none;color:var(--text-2);cursor:pointer;padding:4px;display:none}
.header-right{display:flex;align-items:center;gap:12px}
.theme-btn{background:none;border:1px solid var(--border);padding:4px 8px;cursor:pointer;font-size:14px;line-height:1;transition:all .15s;color:var(--text-2)}
.theme-btn:hover{border-color:var(--accent);color:var(--text)}
.hdr-btn{padding:4px 10px;border:1px solid var(--border);background:var(--bg);font-family:var(--font);font-size:12px;color:var(--text-2);cursor:pointer;transition:all .15s}
.hdr-btn:hover{background:var(--bg-alt);color:var(--text)}
.user-info{display:flex;align-items:center;gap:8px}
.user-name{font-size:13px;color:var(--text-2);font-weight:500}
.sep{width:1px;height:20px;background:var(--border)}

.chat-main{flex:1;overflow-y:auto;padding:20px 16px}
.chat-main::-webkit-scrollbar{width:5px}
.chat-main::-webkit-scrollbar-thumb{background:var(--border)}
.messages{max-width:720px;margin:0 auto}
.msg{margin-bottom:24px;animation:msgIn .3s cubic-bezier(.4,0,.2,1);position:relative}
.msg-header{display:flex;align-items:center;gap:6px;margin-bottom:6px}
.msg-role{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-2)}
.msg-del{display:none;position:absolute;top:4px;right:0;background:none;border:1px solid var(--border);color:var(--text-3);font-size:11px;cursor:pointer;padding:2px 6px;font-family:var(--font);transition:all .15s}
.msg-del:hover{color:var(--danger);border-color:var(--danger)}
.msg:hover .msg-del{display:block}
.msg-content{font-size:14.5px;line-height:1.7}
.msg.user .msg-content{background:var(--bg-alt);padding:10px 14px;border:1px solid var(--border)}
.msg-content p{margin-bottom:8px}.msg-content p:last-child{margin-bottom:0}
.msg-content ul,.msg-content ol{margin:8px 0 8px 20px}
.msg-content pre{background:var(--code-bg);border:1px solid var(--border);padding:12px 14px;margin:10px 0;overflow-x:auto;font-size:13px;line-height:1.5}
.msg-content code{font-family:var(--mono);font-size:13px}
.msg-content p code{background:var(--code-bg);padding:1px 5px;border:1px solid var(--border)}
.msg-content a{color:var(--accent)}
.msg-content table{border-collapse:collapse;margin:10px 0;width:100%;font-size:13px}
.msg-content th,.msg-content td{border:1px solid var(--border);padding:6px 10px;text-align:left}
.msg-content th{background:var(--bg-alt);font-weight:600}

.tool-card{margin:10px 0;border:1px solid var(--tool-border);background:var(--tool-bg);font-size:13px;overflow:hidden;animation:cardIn .3s cubic-bezier(.4,0,.2,1)}
.tool-head{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;user-select:none;transition:background .15s}
.tool-head:hover{background:var(--sidebar-active)}
.tool-status{flex-shrink:0;width:16px;height:16px;display:flex;align-items:center;justify-content:center}
.tool-name{font-family:var(--mono);font-weight:600;color:var(--accent)}
.tool-summary{color:var(--text-2);font-family:var(--mono);font-size:12px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tool-chevron{color:var(--text-3);font-size:11px;transition:transform .25s;flex-shrink:0}
.tool-card.open .tool-chevron{transform:rotate(90deg)}
.tool-body{max-height:0;overflow:hidden;padding:0 12px;border-top:0 solid var(--tool-border);transition:max-height .35s cubic-bezier(.4,0,.2,1),padding .35s ease,border-top-width .1s}
.tool-card.open .tool-body{max-height:400px;overflow-y:auto;padding:10px 12px;border-top-width:1px}
.tool-section{margin-top:8px}.tool-section:first-child{margin-top:0}
.tool-section-label{font-size:11px;font-weight:600;color:var(--text-2);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}
.tool-section pre{background:var(--code-bg);border:1px solid var(--border);padding:8px 10px;font-family:var(--mono);font-size:12px;overflow-x:auto;white-space:pre-wrap;word-break:break-all;max-height:250px;overflow-y:auto}
.spinner{width:14px;height:14px;border:2px solid var(--tool-border);border-top-color:var(--accent);animation:spin .7s linear infinite}
.tool-done{color:var(--success);font-size:15px;line-height:1;animation:popIn .3s cubic-bezier(.4,0,.2,1)}

.thinking-block{margin:10px 0;border:1px solid var(--tool-border);background:var(--tool-bg);font-size:13px;animation:cardIn .3s cubic-bezier(.4,0,.2,1)}
.thinking-head{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;user-select:none;color:var(--text-2);font-style:italic;transition:background .15s}
.thinking-head:hover{background:var(--sidebar-active)}
.thinking-head-label{flex:1}
.thinking-chevron{font-size:11px;transition:transform .25s;color:var(--text-3);flex-shrink:0}
.thinking-block.open .thinking-chevron{transform:rotate(90deg)}
.thinking-body{max-height:0;overflow:hidden;border-top:0 solid var(--tool-border);font-size:13px;line-height:1.6;color:var(--text-2);transition:max-height .4s cubic-bezier(.4,0,.2,1),border-top-width .1s}
.thinking-body-inner{padding:10px 12px}
.thinking-block.open .thinking-body{max-height:50vh;overflow-y:auto;border-top-width:1px}

.thinking-dots{display:inline-block;font-size:13px;color:var(--text-2);font-style:italic;margin:6px 0}
.thinking-dots::after{content:'';animation:dots 1.4s steps(4) infinite}
@keyframes dots{0%{content:''}25%{content:'.'}50%{content:'..'}75%{content:'...'}}
.streamed-text::after{content:'\2588';color:var(--accent);animation:blink .6s step-end infinite;font-size:14px}
.streamed-text.done::after{display:none}

.chat-footer{padding:10px 16px 14px;border-top:1px solid var(--border);background:var(--bg)}
.input-wrap{max-width:720px;margin:0 auto;display:flex;gap:8px;align-items:flex-end}
.attach-btn{width:38px;height:38px;border:1px solid var(--border);background:var(--bg);color:var(--text-2);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s}
.attach-btn:hover{border-color:var(--accent);color:var(--accent)}
.file-chip{display:flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--accent);background:var(--sidebar-active);font-size:12px;color:var(--accent);margin-bottom:6px;max-width:720px;margin-left:auto;margin-right:auto}
.file-chip-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-chip-remove{background:none;border:none;color:var(--text-2);cursor:pointer;font-size:16px;padding:0 4px;line-height:1}
.file-chip-remove:hover{color:var(--danger)}
.xlsx-download{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--accent);color:var(--accent);text-decoration:none;font-size:13px;margin:6px 0;transition:all .15s}
.xlsx-download:hover{background:var(--sidebar-active)}
.xlsx-download svg{width:14px;height:14px}
.msg-content img{max-width:100%;height:auto;border:1px solid var(--border);margin:8px 0}
.inline-chart{background:var(--bg);border:1px solid var(--border);padding:12px;margin:8px 0}
.inline-chart canvas{max-width:100%;height:auto}
.modules-btn{width:38px;height:38px;border:1px solid var(--border);background:var(--bg);color:var(--text-2);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s}
.modules-btn:hover{border-color:var(--accent);color:var(--accent)}
.modules-btn.active{border-color:var(--accent);color:var(--accent);background:var(--sidebar-active)}
.input-box{flex:1;display:flex;align-items:flex-end;border:1px solid var(--border);background:var(--bg-input);padding:8px 12px;transition:border-color .2s}
.input-box:focus-within{border-color:var(--accent)}
.input-box textarea{flex:1;border:none;background:transparent;resize:none;font-family:var(--font);font-size:14px;line-height:1.5;color:var(--text);outline:none;max-height:180px}
.stop-btn{width:38px;height:38px;border:none;background:var(--danger);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .15s;animation:cardIn .2s ease}
.stop-btn:hover{opacity:.85}
.send-btn{width:38px;height:38px;border:none;background:var(--accent);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .1s;flex-shrink:0}
.send-btn:hover{background:var(--accent-hover)}
.send-btn:active{transform:scale(.95)}
.send-btn:disabled{opacity:.35;cursor:not-allowed;transform:none}
.send-btn svg{width:18px;height:18px}
.req-timer{font-family:var(--mono);font-size:12px;color:var(--text-3);min-width:32px;text-align:center;flex-shrink:0;padding-bottom:10px}
.ai-disclaimer{text-align:center;font-size:11px;color:var(--text-3);margin-top:4px}

.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:200;align-items:center;justify-content:center}
.modal-overlay.open{display:flex}
.modal{background:var(--bg);border:1px solid var(--border);width:90%;max-width:440px;animation:cardIn .2s ease}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}
.modal-title{font-weight:600;font-size:15px}
.modal-close{background:none;border:none;font-size:22px;color:var(--text-2);cursor:pointer;line-height:1;padding:0 4px}
.modal-close:hover{color:var(--text)}
.modal-body{padding:12px 16px}
.module-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--border);cursor:pointer;transition:all .15s;margin-bottom:8px}
.module-item:hover{border-color:var(--accent);background:var(--sidebar-active)}
.module-item.disabled{opacity:.5;cursor:not-allowed}.module-item.disabled:hover{border-color:var(--border);background:none}
.module-ok{color:var(--success);font-size:13px;margin-left:4px}
.module-config{padding:8px 12px;border:1px solid var(--border);border-top:0;margin-top:-1px;margin-bottom:8px;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.module-cfg-input{flex:1;min-width:100px;padding:6px 8px;border:1px solid var(--border);background:var(--bg);font-family:var(--font);font-size:13px;color:var(--text);outline:none;transition:border-color .15s}
.module-cfg-input:focus{border-color:var(--accent)}
.module-cfg-save{padding:6px 14px;border:none;background:var(--accent);color:#fff;font-family:var(--font);font-size:12px;font-weight:500;cursor:pointer;transition:background .15s;white-space:nowrap}
.module-cfg-save:hover{background:var(--accent-hover)}
.module-cfg-save:disabled{opacity:.5;cursor:not-allowed}
.module-info{flex:1}
.module-name{font-weight:600;font-size:14px;margin-bottom:2px}
.module-desc{font-size:12px;color:var(--text-2)}
.mcp-switch{position:relative;width:34px;height:18px;flex-shrink:0}
.mcp-switch input{opacity:0;width:0;height:0;position:absolute}
.mcp-switch .sl{position:absolute;inset:0;background:var(--switch-off);transition:.25s;cursor:pointer}
.mcp-switch .sl::before{content:'';position:absolute;width:12px;height:12px;left:3px;bottom:3px;background:#fff;transition:.25s}
.mcp-switch input:checked+.sl{background:var(--accent)}
.mcp-switch input:checked+.sl::before{transform:translateX(16px)}
.module-blocked{font-size:11px;color:var(--danger);font-weight:500;margin-left:6px}
.module-warn{font-size:11px;color:var(--warning);margin-top:4px}

.profile-user{font-size:15px;font-weight:600;margin-bottom:16px}
.usage-section{margin-bottom:8px}
.usage-label{font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text-2)}
.usage-bar-wrap{height:10px;background:var(--bg-alt);border:1px solid var(--border);overflow:hidden;margin-bottom:6px}
.usage-bar{height:100%;background:var(--accent);transition:width .4s ease;width:0}
.usage-bar.warn{background:var(--warning)}
.usage-bar.critical{background:var(--danger)}
.usage-info{font-size:12px;color:var(--text-2)}

.block-screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg);z-index:500}
.block-box{text-align:center;padding:40px}
.block-box h2{font-size:20px;font-weight:600;margin-bottom:10px;color:var(--text)}
.block-box p{font-size:14px;color:var(--text-2)}
.block-box a{color:var(--accent);text-decoration:none;font-weight:500}
.block-box a:hover{text-decoration:underline}

.admin-modal{max-width:600px}
.admin-user{display:flex;align-items:center;gap:10px;padding:8px 10px;border:1px solid var(--border);margin-bottom:4px;font-size:13px;flex-wrap:wrap}
.admin-user-name{font-weight:600;min-width:100px}
.admin-user-tokens{color:var(--text-2);font-family:var(--mono);font-size:12px}
.admin-badges{display:flex;gap:4px}
.admin-badge{font-size:10px;padding:1px 5px;border:1px solid;font-weight:600}
.admin-badge.admin{color:var(--accent);border-color:var(--accent)}
.admin-badge.banned{color:var(--danger);border-color:var(--danger)}
.admin-badge.unverified{color:var(--text-3);border-color:var(--text-3)}
.admin-badge.verified{color:var(--success);border-color:var(--success)}
.admin-actions{display:flex;gap:4px;margin-left:auto}
.admin-act{font-size:11px;padding:2px 8px;border:1px solid var(--border);background:var(--bg);cursor:pointer;font-family:var(--font);transition:all .15s}
.admin-act:hover{border-color:var(--accent);color:var(--accent)}
.admin-act.danger:hover{border-color:var(--danger);color:var(--danger)}

.welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center}
.welcome h2{font-size:20px;font-weight:600;margin-bottom:6px}
.welcome p{font-size:14px;color:var(--text-2);margin-bottom:28px}
.examples{display:flex;flex-direction:column;gap:8px;width:100%;max-width:400px}
.example-btn{padding:10px 14px;border:1px solid var(--border);background:var(--bg);font-family:var(--font);font-size:13px;color:var(--text);text-align:left;cursor:pointer;transition:all .2s}
.example-btn:hover{background:var(--bg-alt);border-color:var(--accent)}

@keyframes spin{to{transform:rotate(360deg)}}
@keyframes blink{50%{opacity:0}}
@keyframes msgIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@keyframes cardIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@keyframes popIn{0%{transform:scale(0);opacity:0}60%{transform:scale(1.2)}100%{transform:scale(1);opacity:1}}

.sidebar-toggle{display:none}
.sidebar-overlay{display:none}

@media(max-width:640px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:100;transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:99;display:none}
  .sidebar.open+.sidebar-overlay{display:block}
  .sidebar-toggle{display:block!important}
  .user-name{display:none}
}