:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--bg:#fff;--bg-sidebar:#f7f7f8;--bg-input:#fff;--bg-hover:#ececee;--bg-code:#f4f4f5;--border:#e4e4e7;--border-strong:#d4d4d8;--text:#18181b;--text-muted:#71717a;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-text:#fff;--danger:#dc2626;--shadow:0 4px 16px #00000014;--sidebar-width:264px;--max-msg:760px}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#0c0c0d;--bg-sidebar:#161617;--bg-input:#1c1c1e;--bg-hover:#262628;--bg-code:#1a1a1c;--border:#2a2a2d;--border-strong:#3a3a3e;--text:#f4f4f5;--text-muted:#a1a1aa;--accent:#3b82f6;--accent-hover:#2563eb;--accent-text:#fff;--danger:#ef4444;--shadow:0 4px 16px #00000080}}*{box-sizing:border-box}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior:none;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.55}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:none;padding:0}input,textarea{font:inherit;color:inherit}.app{height:100dvh;display:flex;overflow:hidden}.chat{flex-direction:column;flex:1;min-width:0;height:100dvh;display:flex}.chat-header{border-bottom:1px solid var(--border);background:var(--bg);align-items:center;gap:8px;min-height:50px;padding:10px 12px;display:flex}.chat-title{white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:600;overflow:hidden}.menu-btn{display:inline-flex}.icon-btn{width:36px;height:36px;color:var(--text-muted);border-radius:8px;justify-content:center;align-items:center;display:inline-flex}.icon-btn:hover{background:var(--bg-hover);color:var(--text)}.messages{-webkit-overflow-scrolling:touch;flex:1;padding:16px 12px 24px;overflow-y:auto}.msg{max-width:var(--max-msg);gap:12px;margin:0 auto 20px;display:flex}.msg-avatar{letter-spacing:.02em;border-radius:8px;flex:none;justify-content:center;align-items:center;width:28px;height:28px;margin-top:2px;font-size:10px;font-weight:700;display:flex}.msg-user .msg-avatar{background:var(--accent);color:var(--accent-text)}.msg-assistant .msg-avatar{background:var(--bg-hover);color:var(--text);border:1px solid var(--border)}.msg-body{flex:1;min-width:0;padding-top:3px}.msg-text{white-space:pre-wrap;word-break:break-word}.cursor{vertical-align:-2px;background:var(--accent);border-radius:1px;width:8px;height:16px;margin-left:2px;animation:1s step-end infinite blink;display:inline-block}@keyframes blink{50%{opacity:0}}.welcome{max-width:var(--max-msg);text-align:center;margin:15vh auto 0;padding:0 16px}.welcome h1{margin:0 0 8px;font-size:26px}.welcome p{color:var(--text-muted);margin:0 0 24px}.center-hint{justify-content:center;padding:40px 0;display:flex}.chat-error{max-width:var(--max-msg);background:color-mix(in srgb, var(--danger) 10%, transparent);border:1px solid color-mix(in srgb, var(--danger) 35%, transparent);color:var(--danger);border-radius:10px;margin:0 auto 16px;padding:10px 14px;font-size:14px}.chat-error a{color:inherit;font-weight:600}.chat-error a:hover{text-decoration:underline}.composer{padding:8px 12px calc(10px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--border);background:var(--bg)}.composer-box{max-width:var(--max-msg);background:var(--bg-input);border:1px solid var(--border-strong);border-radius:16px;align-items:flex-end;gap:8px;margin:0 auto;padding:8px 8px 8px 14px;display:flex}.composer-box:focus-within{border-color:var(--accent)}.composer textarea{resize:none;background:0 0;border:none;outline:none;flex:1;min-height:24px;max-height:180px;padding:4px 0;font-size:16px;line-height:1.45}.composer-hint{text-align:center;color:var(--text-muted);margin:0;font-size:11px}.composer-footer{max-width:var(--max-msg);justify-content:space-between;align-items:center;gap:10px;margin:6px auto 0;display:flex}.composer-tools{flex-wrap:wrap;align-items:center;gap:6px;min-width:0;display:flex}.attach-btn{color:var(--text-muted);background:var(--bg-input);border:1px solid var(--border);white-space:nowrap;cursor:pointer;border-radius:8px;align-items:center;gap:5px;padding:5px 10px;font-size:12px;font-weight:600;display:inline-flex}.attach-btn:hover:not(:disabled){border-color:var(--border-strong);color:var(--text)}.attach-btn:disabled{opacity:.45;cursor:not-allowed}.attachments-row{max-width:var(--max-msg);flex-wrap:wrap;gap:8px;margin:0 auto 8px;display:flex}.attachment-chip{background:var(--bg-input);border:1px solid var(--border);max-width:220px;color:var(--text-muted);border-radius:10px;align-items:center;gap:7px;padding:5px 6px 5px 5px;display:flex}.attachment-thumb{object-fit:cover;border-radius:7px;width:34px;height:34px}.attachment-name{white-space:nowrap;text-overflow:ellipsis;min-width:0;font-size:12px;overflow:hidden}.attachment-remove{width:20px;height:20px;color:var(--text-muted);border-radius:6px;justify-content:center;align-items:center;display:inline-flex}.attachment-remove:hover{background:var(--bg-hover);color:var(--danger)}.msg-attachments{flex-wrap:wrap;gap:8px;margin-bottom:8px;display:flex}.msg-attachment-img{object-fit:cover;border:1px solid var(--border);cursor:zoom-in;border-radius:10px;width:120px;height:120px}.msg-attachment-doc{color:var(--accent);background:var(--bg-input);border:1px solid var(--border);white-space:nowrap;text-overflow:ellipsis;border-radius:8px;align-items:center;gap:6px;max-width:260px;padding:5px 10px;font-size:12.5px;font-weight:600;text-decoration:none;display:inline-flex;overflow:hidden}.msg-attachment-doc:hover{border-color:var(--accent)}.web-btn{color:var(--text-muted);background:var(--bg-input);border:1px solid var(--border);white-space:nowrap;cursor:pointer;border-radius:8px;align-items:center;gap:5px;padding:5px 10px;font-size:12px;font-weight:600;display:inline-flex}.web-btn:hover:not(:disabled){border-color:var(--border-strong);color:var(--text)}.web-btn.on{color:var(--accent);border-color:var(--accent);background:color-mix(in srgb, var(--accent) 10%, transparent)}.web-btn:disabled{opacity:.45;cursor:not-allowed}.model-select{min-width:0;max-width:62%;color:var(--text-muted);background:var(--bg-input);border:1px solid var(--border);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M4 6l4 4 4-4' fill='none' stroke='%2371717a' stroke-width='1.6' 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0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.backdrop{z-index:30;background:#00000073;position:fixed;inset:0}.sidebar-header{align-items:center;gap:8px;padding:12px;display:flex}.btn-new{border:1px solid var(--border-strong);border-radius:10px;flex:1;justify-content:center;align-items:center;gap:8px;padding:9px 12px;font-size:14px;font-weight:600;display:flex}.btn-new:hover{background:var(--bg-hover)}.sidebar-close{display:inline-flex}.conv-list{flex:1;padding:4px 8px 8px;overflow-y:auto}.conv-empty{color:var(--text-muted);padding:16px 10px;font-size:13px}.conv-item{cursor:pointer;border-radius:10px;align-items:center;gap:6px;margin-bottom:2px;padding:8px 8px 8px 12px;display:flex;position:relative}.conv-item:hover{background:var(--bg-hover)}.conv-item.active{background:var(--bg-hover);outline:1px solid var(--border)}.conv-main{flex-direction:column;flex:1;gap:1px;min-width:0;display:flex}.conv-title{white-space:nowrap;text-overflow:ellipsis;font-size:13.5px;overflow:hidden}.conv-time{color:var(--text-muted);font-size:11px}.conv-meta{align-items:center;gap:6px;min-width:0;display:flex}.conv-model{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:11px;overflow:hidden}.conv-meta .conv-model:before{content:"·";opacity:.7;margin-right:6px}.conv-menu{width:28px;height:28px;color:var(--text-muted);border-radius:8px;flex:none;justify-content:center;align-items:center;display:inline-flex}.conv-item:hover .conv-menu,.conv-menu:hover{color:var(--text)}.conv-menu-pop{z-index:20;background:var(--bg-input);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:10px;min-width:120px;padding:4px;position:absolute;top:34px;right:8px}.conv-menu-pop button{text-align:left;border-radius:7px;width:100%;padding:8px 10px;font-size:13.5px;display:block}.conv-menu-pop button:hover{background:var(--bg-hover)}.conv-menu-pop button.danger{color:var(--danger)}.conv-rename{border:1px solid var(--accent);background:var(--bg-input);border-radius:7px;outline:none;flex:1;min-width:0;padding:5px 8px;font-size:13.5px}.sidebar-footer{border-top:1px solid var(--border);align-items:center;gap:8px;padding:12px;display:flex}.footer-user{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:13px;overflow:hidden}.btn-logout{padding:6px 10px;font-size:13px}.btn-primary{background:var(--accent);color:var(--accent-text);border-radius:10px;justify-content:center;align-items:center;padding:10px 18px;font-size:14px;font-weight:600;display:inline-flex}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.btn-ghost{border:1px solid var(--border-strong);border-radius:8px;padding:7px 12px;font-size:14px}.btn-ghost:hover{background:var(--bg-hover)}.btn-danger{background:var(--danger);color:#fff;border-radius:8px;padding:8px 14px;font-size:14px;font-weight:600}.auth-screen{justify-content:center;align-items:center;height:100dvh;padding:20px;display:flex}.auth-card{border:1px solid var(--border);background:var(--bg);width:100%;max-width:360px;box-shadow:var(--shadow);border-radius:16px;padding:28px 24px}.auth-card h1{margin:0 0 6px;font-size:22px}.auth-hint{color:var(--text-muted);margin:0 0 20px;font-size:13.5px}.field{margin-bottom:14px;display:block}.field span{color:var(--text-muted);margin-bottom:5px;font-size:12.5px;display:block}.field input{border:1px solid var(--border-strong);background:var(--bg-input);border-radius:10px;outline:none;width:100%;padding:10px 12px;font-size:16px}.field input:focus{border-color:var(--accent)}.auth-error{color:var(--danger);margin:0 0 12px;font-size:13px}.auth-card .btn-primary{width:100%}.modal-backdrop{z-index:60;background:#00000073;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal{background:var(--bg-input);border:1px solid var(--border);width:100%;max-width:360px;box-shadow:var(--shadow);border-radius:14px;padding:20px}.modal h2{margin:0 0 8px;font-size:17px}.modal p{color:var(--text-muted);margin:0 0 18px;font-size:14px}.modal-actions{justify-content:flex-end;gap:8px;display:flex}.markdown{word-break:break-word}.markdown>:first-child{margin-top:0}.markdown>:last-child{margin-bottom:0}.markdown p{margin:0 0 12px}.markdown h1,.markdown h2,.markdown h3,.markdown h4{margin:20px 0 10px;line-height:1.3}.markdown h1{font-size:20px}.markdown h2{font-size:18px}.markdown h3{font-size:16px}.markdown ul,.markdown ol{margin:0 0 12px;padding-left:22px}.markdown li{margin:3px 0}.markdown blockquote{border-left:3px solid var(--border-strong);color:var(--text-muted);margin:0 0 12px;padding:2px 14px}.markdown a{color:var(--accent);text-decoration:none}.markdown a:hover{text-decoration:underline}.markdown code{background:var(--bg-code);border:1px solid var(--border);border-radius:5px;padding:1px 5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}.markdown pre{background:var(--bg-code);border:1px solid var(--border);border-radius:10px;margin:0 0 14px;padding:34px 14px 14px;position:relative;overflow-x:auto}.markdown pre code{white-space:pre;background:0 0;border:none;padding:0;font-size:13px;line-height:1.5}.copy-btn{border:1px solid var(--border-strong);color:var(--text-muted);background:var(--bg-input);border-radius:7px;padding:4px 10px;font-size:11.5px;position:absolute;top:8px;right:8px}.copy-btn:hover{color:var(--text);border-color:var(--text-muted)}.markdown table{border-collapse:collapse;max-width:100%;margin:0 0 14px;display:block;overflow-x:auto}.reasoning{border:1px solid var(--border);background:var(--bg-code);border-radius:10px;margin:0 0 12px;overflow:hidden}.reasoning summary{color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:7px;padding:8px 12px;font-size:12.5px;font-weight:600;list-style:none;display:flex}.reasoning summary::-webkit-details-marker{display:none}.reasoning summary svg{opacity:.8}.reasoning[open] summary svg{animation:1.2s ease-in-out infinite pulse}@keyframes pulse{50%{opacity:.35}}.reasoning-body{color:var(--text-muted);white-space:pre-wrap;word-break:break-word;max-height:220px;padding:0 12px 12px;font-size:12.5px;line-height:1.55;overflow-y:auto}.searching-note{color:var(--text-muted);align-items:center;gap:8px;padding:2px 0 10px;font-size:13px;display:flex}.searching-spin{border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:13px;height:13px;animation:.8s linear infinite spin}.msg-sources{border-top:1px solid var(--border);flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin-top:10px;padding-top:8px;font-size:12px;display:flex}.msg-sources-label{color:var(--text-muted)}.msg-sources a{color:var(--accent);white-space:nowrap;text-overflow:ellipsis;max-width:240px;text-decoration:none;overflow:hidden}.msg-sources a:hover{text-decoration:underline}.markdown th,.markdown td{border:1px solid var(--border-strong);padding:6px 10px;font-size:13.5px}.markdown th{background:var(--bg-hover)}.boot-screen{justify-content:center;align-items:center;height:100dvh;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:26px;height:26px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (min-width:768px){.sidebar{width:var(--sidebar-width);position:static;transform:none}.sidebar-close,.menu-btn,.backdrop{display:none!important}.chat-header{padding:12px 20px}.messages{padding:24px 24px 32px}.composer{padding:10px 24px calc(14px + env(safe-area-inset-bottom,0px))}}