:root{--font-sans:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,"Apple Color Emoji",Arial,sans-serif,"Segoe UI Emoji";--font-mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;--sidebar-w:268px;--max-col:768px;--radius:12px}:root[data-theme=dark]{--bg:#212121;--bg-elev:#2a2a2a;--sidebar:#171717;--text:#ececec;--text-dim:#afafaf;--text-faint:#7d7d7d;--border:hsla(0,0%,100%,.1);--border-soft:hsla(0,0%,100%,.06);--hover:hsla(0,0%,100%,.055);--hover-strong:hsla(0,0%,100%,.1);--user-bubble:#2f2f2f;--input-bg:#2f2f2f;--accent:#19c37d;--accent-press:#15a76c;--btn-fg:#0d0d0d;--code-bg:#0d0d0d;--code-head:#1b1b1b;--danger:#f1707b;--shadow:0 10px 40px rgba(0,0,0,.45)}:root[data-theme=light]{--bg:#fff;--bg-elev:#fff;--sidebar:#f9f9f9;--text:#0d0d0d;--text-dim:#5d5d5d;--text-faint:#8e8e8e;--border:rgba(0,0,0,.12);--border-soft:rgba(0,0,0,.07);--hover:rgba(0,0,0,.045);--hover-strong:rgba(0,0,0,.08);--user-bubble:#f4f4f4;--input-bg:#fff;--accent:#10a37f;--accent-press:#0d8a6c;--btn-fg:#fff;--code-bg:#0d0d0d;--code-head:#1b1b1b;--danger:#d83a44;--shadow:0 12px 40px rgba(0,0,0,.14)}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-size:16px;line-height:1.5;overflow:hidden}button{font-family:inherit;cursor:pointer}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px;border:2px solid transparent;background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:var(--text-faint);background-clip:padding-box}.app{display:flex;height:100dvh;width:100%;overflow:hidden}.sidebar{width:var(--sidebar-w);flex:0 0 var(--sidebar-w);background:var(--sidebar);border-right:1px solid var(--border-soft);display:flex;flex-direction:column;height:100%;z-index:40}.sidebar-top{padding:10px}.new-chat{display:flex;align-items:center;gap:10px;width:100%;padding:11px 12px;background:transparent;color:var(--text);border:1px solid var(--border);border-radius:10px;font-size:14px;font-weight:500;transition:background .15s ease,border-color .15s ease}.new-chat:hover{background:var(--hover);border-color:var(--border)}.new-chat svg{width:17px;height:17px}.conv-list{flex:1 1;overflow-y:auto;padding:4px 8px 8px;display:flex;flex-direction:column;gap:1px}.conv-section{font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--text-faint);padding:14px 8px 6px}.conv-item{display:flex;align-items:center;gap:9px;padding:9px;border-radius:9px;color:var(--text-dim);font-size:14px;position:relative;-webkit-user-select:none;-moz-user-select:none;user-select:none;transition:background .12s ease,color .12s ease}.conv-item:hover{background:var(--hover);color:var(--text)}.conv-item.active{background:var(--hover-strong);color:var(--text)}.conv-item svg{width:16px;height:16px;flex:0 0 16px;opacity:.8}.conv-title{flex:1 1;white-space:nowrap;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#000 80%,transparent);mask-image:linear-gradient(90deg,#000 80%,transparent)}.conv-del{opacity:0;background:transparent;border:none;color:var(--text-dim);padding:3px;border-radius:6px;display:flex;align-items:center;transition:opacity .12s ease,color .12s ease,background .12s ease}.conv-item:hover .conv-del{opacity:1}.conv-del:hover{color:var(--danger);background:var(--hover-strong)}.conv-del svg{width:15px;height:15px}.conv-empty{color:var(--text-faint);font-size:13px;padding:14px 10px}.sidebar-bottom{border-top:1px solid var(--border-soft);padding:8px;display:flex;flex-direction:column;gap:2px}.theme-toggle{display:flex;align-items:center;gap:10px;width:100%;padding:10px 9px;background:transparent;border:none;border-radius:9px;color:var(--text-dim);font-size:14px;transition:background .12s ease,color .12s ease}.theme-toggle:hover{background:var(--hover);color:var(--text)}.theme-toggle svg{width:17px;height:17px}.brand-note{font-size:11.5px;color:var(--text-faint);text-decoration:none;padding:8px 9px 4px;transition:color .12s ease}.brand-note:hover{color:var(--text-dim)}.main{flex:1 1;min-width:0;display:flex;flex-direction:column;height:100%;background:var(--bg)}.topbar{height:54px;display:flex;align-items:center;gap:8px;padding:0 12px;border-bottom:1px solid transparent}.topbar-title{flex:1 1;font-size:15px;font-weight:600;text-align:center;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.icon-btn{width:38px;height:38px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:9px;color:var(--text);transition:background .12s ease}.icon-btn:hover{background:var(--hover)}.icon-btn svg{width:20px;height:20px}.menu-btn{display:none}.messages{flex:1 1;overflow-y:auto;scroll-behavior:smooth}.messages-inner{max-width:var(--max-col);margin:0 auto;padding:26px 20px 12px}.msg{display:flex;gap:16px;padding:14px 0 18px;animation:rise .32s cubic-bezier(.2,.7,.2,1) both}@keyframes rise{0%{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}.msg-avatar{flex:0 0 30px;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-top:2px}.msg.assistant .msg-avatar{background:var(--accent);color:#fff}.msg.user .msg-avatar{background:var(--bg-elev);border:1px solid var(--border);color:var(--text)}.msg-avatar svg{width:17px;height:17px}.msg-body{flex:1 1;min-width:0;padding-top:3px}.msg-role{font-size:13px;font-weight:600;color:var(--text);margin-bottom:3px}.msg-text.user-text{white-space:pre-wrap;word-wrap:break-word;color:var(--text);line-height:1.65}.msg-actions{display:flex;gap:4px;margin-top:10px;opacity:0;transition:opacity .15s ease}.msg:hover .msg-actions{opacity:1}.msg-act{font-size:12.5px;color:var(--text-dim);background:transparent;border:none;padding:5px 9px;border-radius:7px;transition:background .12s ease,color .12s ease}.msg-act:hover{background:var(--hover);color:var(--text)}.thinking{display:inline-flex;gap:5px;padding:6px 0}.thinking span{width:7px;height:7px;border-radius:50%;background:var(--text-faint);animation:blink 1.3s ease-in-out infinite both}.thinking span:nth-child(2){animation-delay:.18s}.thinking span:nth-child(3){animation-delay:.36s}@keyframes blink{0%,80%,to{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}.cursor{display:inline-block;width:9px;height:17px;margin-left:1px;vertical-align:text-bottom;background:var(--text);border-radius:1px;animation:caret 1s steps(1) infinite}@keyframes caret{50%{opacity:0}}.markdown{color:var(--text);line-height:1.7;font-size:16px;word-wrap:break-word}.markdown>:first-child{margin-top:0}.markdown>:last-child{margin-bottom:0}.markdown p{margin:0 0 16px}.markdown h1,.markdown h2,.markdown h3,.markdown h4{margin:26px 0 12px;font-weight:650;line-height:1.3}.markdown h1{font-size:1.55em}.markdown h2{font-size:1.32em}.markdown h3{font-size:1.14em}.markdown h4{font-size:1em}.markdown ol,.markdown ul{margin:0 0 16px;padding-left:26px}.markdown li,.markdown li>ol,.markdown li>ul{margin:6px 0}.markdown a{color:var(--accent);text-decoration:none}.markdown a:hover{text-decoration:underline}.markdown strong{font-weight:650}.markdown blockquote{margin:0 0 16px;padding:4px 16px;border-left:3px solid var(--border);color:var(--text-dim)}.markdown hr{border:none;border-top:1px solid var(--border);margin:22px 0}.markdown code{font-family:var(--font-mono);font-size:.88em;background:var(--hover-strong);padding:.15em .4em;border-radius:5px}.markdown pre{margin:0 0 16px;background:var(--code-bg);border-radius:0 0 10px 10px;overflow-x:auto}.markdown pre code{display:block;background:transparent;padding:14px 16px;font-size:13.5px;line-height:1.6;color:#e6e6e6;border-radius:0}.code-head{display:flex;align-items:center;justify-content:space-between;background:var(--code-head);border-radius:10px 10px 0 0;padding:7px 14px;font-size:12px;color:#b4b4b4;font-family:var(--font-mono);margin-top:16px}.code-head+pre{margin-top:0}.code-copy{background:transparent;border:none;color:#b4b4b4;font-size:12px;padding:2px 6px;border-radius:6px;transition:background .12s ease,color .12s ease}.code-copy:hover{background:hsla(0,0%,100%,.1);color:#fff}.markdown table{border-collapse:collapse;width:100%;margin:0 0 16px;font-size:14.5px;display:block;overflow-x:auto}.markdown td,.markdown th{border:1px solid var(--border);padding:8px 12px;text-align:left}.markdown th{background:var(--hover);font-weight:600}.empty{height:100%;flex-direction:column;padding:24px 20px 80px;text-align:center;animation:rise .4s ease both}.empty,.empty-logo{display:flex;align-items:center;justify-content:center}.empty-logo{width:52px;height:52px;border-radius:50%;background:var(--accent);color:#fff;margin-bottom:22px;box-shadow:var(--shadow)}.empty-logo svg{width:28px;height:28px}.empty-title{font-size:28px;font-weight:600;margin:0 0 28px;letter-spacing:-.01em}.prompt-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px;width:100%;max-width:600px}.prompt-chip{text-align:left;background:transparent;border:1px solid var(--border);border-radius:13px;padding:15px 16px;font-size:14px;color:var(--text-dim);line-height:1.45;transition:background .14s ease,border-color .14s ease,transform .14s ease,color .14s ease}.prompt-chip:hover{background:var(--hover);border-color:var(--text-faint);color:var(--text);transform:translateY(-2px)}.composer{padding:0 20px 14px;background:linear-gradient(to top,var(--bg) 55%,transparent)}.composer-inner{max-width:var(--max-col);margin:0 auto}.error-bar{background:color-mix(in srgb,var(--danger) 14%,var(--bg));border:1px solid color-mix(in srgb,var(--danger) 40%,transparent);color:var(--danger);font-size:13.5px;padding:9px 14px;border-radius:10px;margin-bottom:10px}.input-box{display:flex;align-items:flex-end;gap:8px;background:var(--input-bg);border:1px solid var(--border);border-radius:26px;padding:8px 8px 8px 18px;box-shadow:0 1px 4px rgba(0,0,0,.08);transition:border-color .15s ease}.input-box:focus-within{border-color:var(--text-faint)}.chat-input{flex:1 1;resize:none;border:none;outline:none;background:transparent;color:var(--text);font-family:inherit;font-size:16px;line-height:1.5;max-height:200px;padding:8px 0;overflow-y:auto}.chat-input::placeholder{color:var(--text-faint)}.send-btn{flex:0 0 36px;width:36px;height:36px;border-radius:50%;border:none;background:var(--accent);color:var(--btn-fg);display:flex;align-items:center;justify-content:center;transition:background .15s ease,opacity .15s ease,transform .1s ease}.send-btn:hover:not(:disabled){background:var(--accent-press)}.send-btn:active:not(:disabled){transform:scale(.94)}.send-btn:disabled{background:var(--hover-strong);color:var(--text-faint);cursor:not-allowed}.send-btn.stop{background:var(--text);color:var(--bg)}.send-btn svg{width:18px;height:18px}.composer-foot{text-align:center;font-size:12px;color:var(--text-faint);padding:11px 0 2px}.overlay{display:none}@media (max-width:860px){.menu-btn{display:flex}.topbar{border-bottom:1px solid var(--border-soft)}.sidebar{position:fixed;top:0;left:0;height:100dvh;transform:translateX(-102%);transition:transform .26s cubic-bezier(.2,.7,.2,1);box-shadow:var(--shadow)}.sidebar.open{transform:translateX(0)}.overlay{display:block;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:35;animation:fade .2s ease}@keyframes fade{0%{opacity:0}to{opacity:1}}.prompt-grid{grid-template-columns:1fr}.empty-title{font-size:24px}.composer,.messages-inner{padding-left:14px;padding-right:14px}}.spin{animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.boot{height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;background:var(--bg);color:var(--text-faint)}.boot .spin{width:26px;height:26px}.conv-loading{height:100%;display:flex;align-items:center;justify-content:center;color:var(--text-faint)}.conv-loading .spin{width:26px;height:26px}.login{height:100dvh;justify-content:center;padding:24px;background:radial-gradient(1100px 500px at 50% -10%,color-mix(in srgb,var(--accent) 12%,transparent),transparent),var(--bg)}.login,.login-card{display:flex;align-items:center}.login-card{width:100%;max-width:400px;text-align:center;flex-direction:column;animation:rise .45s ease both}.login-card .empty-logo{margin-bottom:20px}.login-title{font-size:27px;font-weight:650;margin:0 0 10px;letter-spacing:-.01em}.login-sub{color:var(--text-dim);font-size:15px;line-height:1.55;margin:0 0 26px;max-width:340px}.login-err{background:color-mix(in srgb,var(--danger) 14%,var(--bg));border:1px solid color-mix(in srgb,var(--danger) 40%,transparent);color:var(--danger);font-size:13px;padding:9px 14px;border-radius:10px;margin-bottom:18px;width:100%}.google-btn{display:inline-flex;align-items:center;justify-content:center;gap:11px;width:100%;padding:13px 18px;background:#fff;color:#1f1f1f;border:1px solid rgba(0,0,0,.12);border-radius:12px;font-size:15px;font-weight:550;text-decoration:none;transition:transform .12s ease,box-shadow .15s ease;box-shadow:0 1px 3px rgba(0,0,0,.1)}.google-btn:hover{transform:translateY(-1px);box-shadow:0 5px 18px rgba(0,0,0,.16)}.login-foot{margin-top:26px;font-size:12px;color:var(--text-faint)}.user-row{display:flex;align-items:center;gap:10px;padding:8px;border-radius:10px;margin-top:2px}.user-row:hover{background:var(--hover)}.user-ava{flex:0 0 30px;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;overflow:hidden}.user-ava img{width:100%;height:100%;object-fit:cover}.user-meta{flex:1 1;min-width:0}.user-name{font-size:13px;font-weight:550;color:var(--text)}.user-email,.user-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-email{font-size:11.5px;color:var(--text-faint)}.logout-btn{flex:0 0 auto;background:transparent;border:none;color:var(--text-dim);padding:6px;border-radius:8px;display:flex;align-items:center;transition:background .12s ease,color .12s ease}.logout-btn:hover{background:var(--hover-strong);color:var(--text)}.logout-btn svg{width:17px;height:17px}.composer-tools{display:flex;align-items:center;gap:8px;margin-bottom:9px;flex-wrap:wrap}.select-wrap{position:relative}.model-select{-moz-appearance:none;appearance:none;-webkit-appearance:none;background:var(--bg-elev);color:var(--text);border:1px solid var(--border);border-radius:9px;font-family:inherit;font-size:13px;font-weight:500;padding:7px 30px 7px 12px;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,var(--text-dim) 50%),linear-gradient(135deg,var(--text-dim) 50%,transparent 50%);background-position:calc(100% - 16px) 52%,calc(100% - 11px) 52%;background-size:5px 5px,5px 5px;background-repeat:no-repeat;transition:border-color .12s ease,background-color .12s ease}.model-select:hover{border-color:var(--text-faint)}.model-select:disabled{opacity:.55;cursor:not-allowed}.mode-btn{display:inline-flex;align-items:center;gap:7px;background:var(--bg-elev);color:var(--text-dim);border:1px solid var(--border);border-radius:9px;font-size:13px;font-weight:500;padding:7px 12px;transition:background .12s ease,color .12s ease,border-color .12s ease}.mode-btn svg{width:16px;height:16px}.mode-btn:hover{border-color:var(--text-faint);color:var(--text)}.mode-btn.active{background:color-mix(in srgb,var(--accent) 16%,var(--bg));border-color:var(--accent);color:var(--accent)}.tool-hint{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--text-faint)}.tool-hint .spin{width:13px;height:13px}.tool-hint.rec{color:var(--danger);animation:pulse 1.3s ease-in-out infinite}@keyframes pulse{50%{opacity:.5}}.mic-btn{flex:0 0 34px;width:34px;height:34px;border-radius:50%;border:none;background:transparent;color:var(--text-dim);display:flex;align-items:center;justify-content:center;margin-bottom:1px;transition:background .12s ease,color .12s ease}.mic-btn:hover:not(:disabled){background:var(--hover-strong);color:var(--text)}.mic-btn:disabled{opacity:.5;cursor:not-allowed}.mic-btn svg{width:19px;height:19px}.mic-btn.rec{background:var(--danger);color:#fff;animation:micpulse 1.2s ease-in-out infinite}@keyframes micpulse{0%,to{box-shadow:0 0 0 0 color-mix(in srgb,var(--danger) 55%,transparent)}50%{box-shadow:0 0 0 7px transparent}}.msg-image{display:inline-block;border-radius:14px;overflow:hidden;border:1px solid var(--border);max-width:420px;line-height:0;transition:transform .15s ease}.msg-image:hover{transform:scale(1.006)}.msg-image img{width:100%;height:auto;display:block}.img-loading{display:inline-flex;align-items:center;gap:11px;color:var(--text-dim);font-size:14px;background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:22px 26px;width:320px;max-width:100%}.img-loading .spin{width:18px;height:18px;color:var(--accent)}.img-error{color:var(--danger);font-size:14px;background:color-mix(in srgb,var(--danger) 12%,var(--bg));border:1px solid color-mix(in srgb,var(--danger) 35%,transparent);border-radius:12px;padding:12px 16px;display:inline-block}.msg-act{display:inline-flex;align-items:center;gap:5px;text-decoration:none}.msg-act svg{width:14px;height:14px}.msg-act .spin{width:13px;height:13px}.msg-act.on{color:var(--accent)}.error-bar{display:flex;align-items:center;justify-content:space-between;gap:10px}.error-x{background:transparent;border:none;color:var(--danger);font-size:18px;line-height:1;padding:0 2px;opacity:.8}.error-x:hover{opacity:1}.mode-banner{margin-top:24px;font-size:13.5px;color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,var(--bg));border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);border-radius:10px;padding:9px 16px}@media (max-width:860px){.img-loading,.msg-image{max-width:100%}}