:root{color-scheme:light;--bg: #ffffff;--panel: #f8faf9;--surface: #ffffff;--surface-soft: #f3f7f5;--bubble: #edf7f1;--border: #dce5e2;--border-soft: #eef3f1;--text: #0b1220;--body: #263142;--muted: #687385;--accent: #078a4f;--accent-dark: #056b3e;--accent-soft: #e7f6ef;--danger: #b42318;--shadow: 0 22px 70px rgba(15, 23, 42, .12);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;background:var(--bg);color:var(--text)}button,input,textarea{font:inherit}button{cursor:pointer}.loading,.login-screen{min-height:100svh;display:grid;place-items:center;background:#fff}.loading{color:var(--accent);font-size:26px;font-weight:760}.login-card{width:min(400px,calc(100vw - 32px));border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:30px;box-shadow:0 18px 60px #0f172a14}.brand,.drawer-head,.topbar-actions,.account,.composer-actions,.action-row,.settings-pill,.message-actions,.file-card a,.lightbox-download{display:flex;align-items:center}.brand{gap:12px;font-size:24px;font-weight:760;letter-spacing:0}.brand-mark,.account span{display:grid;place-items:center;flex:0 0 auto;color:#fff;background:var(--accent)}.brand-mark{width:34px;height:34px;border-radius:8px}.login-brand{margin-bottom:26px}.login-card label{display:grid;gap:7px;margin-bottom:16px;color:#344054;font-size:13px;font-weight:650}.login-card input{height:44px;border:1px solid var(--border);border-radius:8px;padding:0 12px;outline:none}.login-card input:focus,.composer textarea:focus{border-color:#078a4f80;box-shadow:0 0 0 3px #078a4f1a}.login-button,.new-chat,.send-button{border:0;background:var(--accent);color:#fff;font-weight:700}.login-button{width:100%;height:44px;border-radius:8px}.login-button:hover,.new-chat:hover,.send-button:hover{background:var(--accent-dark)}.login-error{margin:0 0 14px;color:var(--danger);font-size:14px}.shell{display:grid;grid-template-columns:286px minmax(0,1fr);height:100svh;overflow:hidden;background:var(--bg)}.sidebar{display:flex;flex-direction:column;min-height:0;border-right:1px solid var(--border-soft);background:var(--panel);padding:24px 18px}.drawer-head{justify-content:space-between;gap:12px}.drawer-close{display:none}.new-chat{justify-content:center;gap:9px;width:100%;min-height:46px;margin:28px 0 24px;border-radius:8px;font-size:15px}.history-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 4px 10px;color:var(--muted);font-size:13px;font-weight:680}.history-head small{color:#98a2b3;font-size:12px;font-weight:640}.history-list{display:grid;align-content:start;gap:2px;overflow:auto}.history-item{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;width:100%;min-height:42px;border:0;border-radius:8px;background:transparent;color:#1f2937;padding:0 10px;text-align:left}.history-item span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:14px}.history-item time{color:var(--muted);font-size:12px}.history-item.active{background:var(--accent-soft)}.sidebar-footer{margin-top:auto;border-top:1px solid var(--border-soft);padding-top:14px}.ghost-button,.icon-button,.copy-button,.stop-button,.settings-pill{border:1px solid transparent;background:transparent;color:#344054}.ghost-button{gap:10px;width:100%;height:40px;border-radius:8px;padding:0 10px}.ghost-button:hover,.icon-button:hover,.copy-button:hover,.settings-pill:hover{background:#edf2f1}.drawer-scrim{display:none}.main{display:grid;grid-template-rows:62px minmax(0,1fr) auto;min-width:0;height:100svh}.topbar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:0 28px;background:#fffffff5;box-shadow:0 1px #1018280f}.icon-button{display:grid;place-items:center;width:38px;height:38px;border-radius:8px}.topbar .menu-button,.new-chat-icon{display:none}.topbar-title{min-width:0}.topbar h1{margin:0;overflow:hidden;color:var(--text);font-size:17px;line-height:1.15;text-overflow:ellipsis;white-space:nowrap}.topbar p{display:flex;align-items:center;gap:7px;min-width:0;margin:5px 0 0;overflow:hidden;color:var(--muted);font-size:12px;white-space:nowrap}.desktop-meta{display:inline-flex;align-items:center;gap:7px}.topbar p i{width:1px;height:11px;background:var(--border)}.dot{width:7px;height:7px;border-radius:50%;background:var(--accent)}.topbar-actions{justify-content:flex-end;gap:10px;min-width:0}.account{gap:10px;min-width:0;color:#1f2937}.account span{width:34px;height:34px;border-radius:50%;font-size:13px;font-weight:760}.account strong{overflow:hidden;max-width:120px;text-overflow:ellipsis}.messages{overflow:auto;padding:26px 44px 18px;scroll-behavior:smooth}.empty-state{display:grid;place-items:center;align-content:center;min-height:100%;color:var(--muted);text-align:center}.empty-mark{display:grid;place-items:center;width:52px;height:52px;margin-bottom:18px;border-radius:50%;background:var(--accent-soft);color:var(--accent)}.empty-state h2{margin:0 0 8px;color:var(--text);font-size:26px;line-height:1.2}.empty-state p{max-width:560px;margin:0;line-height:1.65}.prompt-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;width:min(720px,100%);margin-top:26px}.prompt-grid 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a,.lightbox-download{gap:8px;color:var(--accent);text-decoration:none;font-weight:700}.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(156px,1fr));gap:12px;max-width:760px;margin:18px 0}.image-grid button{position:relative;display:block;overflow:hidden;aspect-ratio:4 / 3;border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:0}.image-grid img{width:100%;height:100%;object-fit:cover}.image-grid span{position:absolute;right:8px;bottom:8px;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#111827b8;color:#fff}.composer{width:min(860px,calc(100% - 42px));margin:0 auto 18px}.composer-box{border:1px solid #ccd8d4;border-radius:16px;background:var(--surface);padding:11px;box-shadow:0 14px 44px #0f172a14}.composer textarea{width:100%;min-height:58px;max-height:30svh;resize:none;border:0;outline:none;color:var(--text);font-size:16px;line-height:1.5}.composer-actions{justify-content:space-between;gap:12px;margin-top:8px}.settings-pill{gap:7px;min-width:0;max-width:min(360px,70%);height:34px;border-radius:999px;background:var(--surface-soft);color:var(--body);padding:0 11px;font-size:13px;font-weight:700}.settings-pill span{color:var(--muted);font-weight:650}.action-row{gap:8px}.stop-button{gap:8px;height:38px;border-color:var(--border);border-radius:8px;background:var(--surface);color:#1f2937;padding:0 14px;font-weight:700}.send-button{display:grid;place-items:center;width:42px;height:38px;border-radius:12px}.send-button:disabled{cursor:not-allowed;background:#b8c8c1}.composer-status{display:inline-flex;align-items:center;gap:7px;margin:8px 2px 0;color:var(--muted);font-size:12px;font-weight:700}.composer-status span{width:8px;height:8px;border-radius:50%;background:#98a2b3}.composer-status.generating{color:#c27a10}.composer-status.generating span{background:#c27a10}.settings-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;display:grid;place-items:end center}.settings-scrim{position:absolute;top:0;right:0;bottom:0;left:0;border:0;background:#0f172a38}.settings-sheet{position:relative;z-index:1;width:min(620px,calc(100vw - 24px));max-height:min(78svh,620px);overflow:auto;border:1px solid var(--border);border-radius:18px 18px 0 0;background:var(--surface);padding:10px 16px 18px;box-shadow:var(--shadow)}.sheet-handle{width:42px;height:4px;margin:0 auto 12px;border-radius:999px;background:#d5dedb}.sheet-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.sheet-header h2{margin:0;font-size:18px}.sheet-header p{margin:4px 0 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button.selected{border-color:var(--accent);background:var(--accent);color:#fff}.lightbox{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:grid;place-items:center;background:#f7faf9eb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.lightbox img{max-width:min(1100px,82vw);max-height:78svh;border-radius:8px;box-shadow:0 22px 80px #0f172a2e}.lightbox-close,.lightbox-nav{position:absolute;display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--border);border-radius:50%;background:var(--surface);color:#1f2937}.lightbox-close{top:28px;right:28px}.lightbox-nav.left{left:36px}.lightbox-nav.right{right:36px}.lightbox-nav:disabled{opacity:.35;cursor:not-allowed}.lightbox-download{position:absolute;bottom:28px;height:42px;border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:0 14px}@media(min-width:981px){.settings-sheet{margin-bottom:24px;border-radius:18px}}@media(max-width:980px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;z-index:24;width:min(320px,86vw);transform:translate(-104%);transition:transform .18s ease;box-shadow:18px 0 50px #0f172a24}.history-open .sidebar{transform:translate(0)}.drawer-close{display:grid}.drawer-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:23;display:none;border:0;background:#0f172a33}.history-open .drawer-scrim{display:block}.main{grid-template-rows:58px minmax(0,1fr) auto}.topbar{grid-template-columns:42px minmax(0,1fr) 42px;gap:8px;padding:0 10px;box-shadow:none}.topbar .menu-button,.new-chat-icon{display:grid}.topbar-title{text-align:center}.topbar h1{font-size:16px}.topbar p{justify-content:center;gap:6px;margin-top:4px}.desktop-meta{display:none}.topbar-actions{justify-content:end}.topbar-actions .account{display:none}.messages{padding:14px 14px 10px}.message{margin-bottom:22px}.message.user .message-body{max-width:86%;padding:11px 14px}.markdown{font-size:15px;line-height:1.7}.empty-state h2{font-size:23px}.prompt-grid{grid-template-columns:1fr}.composer{width:100%;margin:0;padding:0 10px calc(10px + env(safe-area-inset-bottom));background:linear-gradient(180deg,#fff0,#fff 18px)}.composer-box{padding:10px}.composer textarea{min-height:54px}.settings-pill{max-width:64%}.file-card{grid-template-columns:40px minmax(0,1fr);gap:12px;padding:13px}.file-icon{width:40px;height:40px}.file-card a{grid-column:2;width:fit-content;min-height:34px}.lightbox img{max-width:90vw;max-height:72svh}}@media(max-width:430px){.messages{padding-inline:14px}.message.user .message-body{max-width:90%}.settings-pill{max-width:70%;font-size:12px}.segments button{font-size:12px}}