:root{color-scheme:light;--bg:#fff;--fg:#242424;--muted:#828282;--border:#e7e7e7;--soft:#f5f5f5;--bubble:#f0f0f0;--hover:#ececec;--accent:#212121;--on-accent:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg)}body.dark{color-scheme:dark;--bg:#212121;--fg:#ececec;--muted:#aaa;--border:#3c3c3c;--soft:#2f2f2f;--bubble:#303030;--hover:#383838;--accent:#f4f4f4;--on-accent:#171717}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,label:focus-within{outline:2px solid #7e9d8a;outline-offset:4px}button{color:inherit}button,a{touch-action:manipulation}[hidden]{display:none!important}#app{height:100dvh;display:grid;grid-template-rows:64px minmax(0,1fr) auto}header{display:flex;align-items:center;justify-content:space-between;padding:0 25px;border-bottom:1px solid transparent;background:var(--bg);z-index:2}.brand{font-weight:650;letter-spacing:-.5px;display:flex;align-items:center;gap:10px;font-size:20px;text-decoration:none;color:inherit}.brand-mark{color:var(--fg);width:29px;height:29px;display:block;flex-shrink:0}.chevron{font-size:18px;color:var(--muted);margin-left:2px}.header-right{display:flex;gap:12px;align-items:center}#connection{font-size:12px;color:var(--muted)}#connection.online:before{content:' ';display:inline-block;width:6px;height:6px;background:#72a78b;border-radius:50%;margin-right:6px}.icon-button{background:none;border:0;border-radius:50%;width:40px;height:40px;display:grid;place-items:center;font-size:23px}.icon-button:hover{background:var(--soft)}#conversation{overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;padding:24px 24px 30px}#empty{max-width:680px;margin:clamp(20px,8vh,100px) auto 0;text-align:center}.welcome-mark{display:inline-grid;place-items:center;position:relative;width:54px;height:54px;border-radius:18px;border:1px solid var(--border);font-size:31px;font-weight:550;transform:rotate(-6deg);box-shadow:0 6px 20px #00000005}.welcome-mark span{position:absolute;right:-10px;top:-9px;font-size:22px;color:#88a793}.eyebrow{font-size:9px;letter-spacing:2.4px;color:var(--muted);margin:22px 0 13px}h1{font-size:30px;font-weight:600;letter-spacing:-1px;margin:0 0 14px}.welcome-sub{color:var(--muted);font-size:14px;margin:0}.suggestions{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:37px 0 0}.suggestions button{border:1px solid var(--border);background:var(--bg);border-radius:18px;padding:18px 14px;text-align:left;transition:background .15s}.suggestions button:hover{background:var(--soft)}.suggestions span{display:block;font-size:24px;margin-bottom:16px;color:#789185}.suggestions strong{display:block;font-size:13px;font-weight:550;margin-bottom:6px}.suggestions small{font-size:11px;color:var(--muted)}#messages{max-width:760px;margin:auto}.turn{margin:0 0 30px}.user-row{display:flex;justify-content:flex-end}.user-bubble{background:var(--bubble);border-radius:24px;max-width:85%;padding:13px 20px;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.65;font-size:15px}.references{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end;margin:10px 0 20px}.references img{max-width:150px;max-height:160px;object-fit:cover;border-radius:14px}.file-card{display:flex;align-items:center;gap:10px;padding:10px 13px;border:1px solid var(--border);border-radius:15px;font-size:12px;color:var(--fg);text-decoration:none;background:var(--bg);max-width:270px}.file-icon{border-radius:8px;background:var(--soft);color:var(--muted);padding:10px 6px;font-size:10px;font-weight:600}.file-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-card small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.assistant{margin-top:24px;line-height:1.85;font-size:15px;overflow-wrap:anywhere}.assistant p{margin:0 0 14px}.assistant h2,.assistant h3{font-size:18px;line-height:1.5;margin:20px 0 12px}.assistant ul,.assistant ol{padding-left:24px}.assistant a{color:inherit;text-underline-offset:3px}.assistant code{background:var(--soft);padding:2px 5px;border-radius:4px;font-size:13px}.assistant pre{overflow:auto;background:var(--soft);border:1px solid var(--border);border-radius:14px;padding:16px;font:12px/1.7 Consolas,monospace;white-space:pre}.assistant pre code{background:none;padding:0}.response-meta{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:11px}.copy{border:0;background:none;color:var(--muted);font-size:12px;padding:5px 0}.error{color:#ba5a4f;font-size:13px;white-space:pre-wrap}.deliverables{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.deliverables img{max-width:100%;border-radius:14px}.working:after{content:'●';font-size:9px;margin-left:7px;animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.2}}footer{padding:0 24px max(10px,env(safe-area-inset-bottom));background:var(--bg)}#composer{max-width:760px;margin:auto;border:1px solid var(--border);border-radius:27px;background:var(--soft);padding:13px 13px 9px;box-shadow:0 3px 10px #00000003}textarea{display:block;width:100%;resize:none;border:0;background:transparent;color:var(--fg);outline:none;font-size:16px;line-height:1.6;min-height:36px;max-height:170px;padding:4px 7px}textarea::placeholder{color:var(--muted)}.composer-bottom{display:flex;gap:7px;align-items:center;padding-top:4px}.attach{cursor:pointer;font-size:29px;font-weight:300}.attach:hover{background:var(--hover)}#input-hint{font-size:12px;color:var(--muted);flex:1}#send{border:0;border-radius:50%;width:36px;height:36px;background:var(--accent);color:var(--on-accent);font-size:26px;line-height:1;font-weight:500}#stop{background:var(--bg);border:1px solid var(--border);font-size:12px;border-radius:20px;padding:9px 12px}.footnote{text-align:center;font-size:10px;color:var(--muted);margin:10px 0 0;letter-spacing:.2px}.footnote span{margin:0 6px}#notice{max-width:760px;margin:0 auto 9px;font-size:12px;color:#b06141}#attachments{display:flex;gap:8px;overflow:auto}#attachments:not(:empty){padding-bottom:9px}.draft-file{display:flex;gap:8px;align-items:center;flex-shrink:0;background:var(--bg);padding:7px;border:1px solid var(--border);border-radius:14px;max-width:240px;font-size:12px}.draft-file img{width:40px;height:40px;object-fit:cover;border-radius:8px}.draft-file button{border:0;background:none;font-size:19px;color:var(--muted)}#upload-status{display:flex;gap:10px;align-items:center;font-size:11px;color:var(--muted);padding:8px}progress{width:80px;accent-color:#759784}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}body.dragging #composer{outline:2px dashed #7e9d8a;outline-offset:4px}@media(max-width:600px){#app{grid-template-rows:56px minmax(0,1fr) auto}header{padding:0 16px}.brand{font-size:19px}.brand-mark{width:27px;height:27px}#connection{font-size:10px}.header-right{gap:5px}#conversation{padding:20px 17px 22px}#empty{margin:clamp(24px,6vh,54px) auto 0}h1{font-size:26px}.welcome-sub{font-size:13px}.suggestions{grid-template-columns:repeat(2,1fr);gap:9px;margin:28px auto 0;max-width:360px}.suggestions button{padding:14px 16px;border-radius:17px}.suggestions span{margin-bottom:11px;font-size:21px}.suggestions strong{font-size:12px}.suggestions small{font-size:10px}footer{padding-left:10px;padding-right:10px}#composer{border-radius:25px;padding:11px 10px 7px}.user-bubble{font-size:15px;max-width:91%;padding:11px 17px}.assistant{font-size:15px}.footnote{font-size:9px;margin-top:8px}.references img{max-width:125px}.turn{margin-bottom:26px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}