:root{font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:#20252a;background:#f7f8fa;font-synthesis:none;--muted:#7a8088;--line:#e5e8ec;--green:#168765;--soft:#edf7f2}*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}[hidden]{display:none!important}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #7fbea9;outline-offset:3px}.pairing{min-height:100dvh;display:grid;place-items:center;padding:28px;background:radial-gradient(ellipse at 30% 10%,#e7f1ed 0,transparent 60%),#f7f8fa}.pair-card{width:430px;max-width:100%;background:#fff;border:1px solid var(--line);border-radius:24px;padding:40px;box-shadow:0 22px 90px #24362d0a}.brand-icon{width:58px;height:58px;border-radius:16px;background:#202a26;color:#fff;font-size:31px;font-weight:650;padding:8px 15px;position:relative}.brand-icon span{font-size:23px;position:absolute;right:5px;top:3px;color:#99d5b6}.eyebrow{color:var(--muted);font-size:10px;letter-spacing:2px;font-weight:600;margin:27px 0 14px}h1{font-size:38px;line-height:1.25;letter-spacing:-1.5px;margin:0 0 16px;font-weight:650}.intro{font-size:14px;line-height:1.85;color:#6f777e;margin:0 0 30px}label{font-size:12px;font-weight:600}#pair-code{width:100%;height:51px;border:1px solid #d9dfe3;background:#fafbfc;border-radius:10px;margin:10px 0 14px;padding:0 14px;font-family:Consolas,monospace;font-size:16px;letter-spacing:1px;text-transform:uppercase}.primary{border:0;border-radius:10px;background:#202a26;color:#fff;min-height:46px;font-size:14px;font-weight:600;padding:11px 18px;display:flex;justify-content:space-between;align-items:center;gap:20px}.primary:hover:not(:disabled){background:#304d40}#login-button{width:100%}.error{font-size:12px;color:#b23d3d;min-height:16px;line-height:1.5}.pair-hint{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:22px;margin:22px 0 0;display:flex;gap:8px;align-items:center}.dot{display:inline-block;width:7px;height:7px;background:var(--green);border-radius:50%;flex:none}.dot.offline{background:#c98f46}.workspace{height:100dvh;display:flex;overflow:hidden}.sidebar{width:290px;flex:none;border-right:1px solid var(--line);background:#f4f5f7;padding:28px 18px 18px;display:flex;flex-direction:column}.side-brand{display:flex;align-items:center;gap:12px;padding:0 9px 28px}.small-logo{height:36px;width:36px;display:grid;place-items:center;color:#fff;background:#25302a;border-radius:10px;font-weight:600;font-size:17px}.side-brand strong{display:block;font-size:16px;font-weight:650}.side-brand span{display:block;color:var(--muted);font-size:10px;margin-top:3px;letter-spacing:.4px}.sidebar-heading{display:flex;justify-content:space-between;align-items:center;color:#777f87;font-size:11px;font-weight:600;padding:0 10px 12px}.icon{border:0;background:transparent;border-radius:8px;width:34px;height:34px;font-size:22px;color:#69727a;display:grid;place-items:center;flex:none}.icon:hover{background:#e8ecef;color:#20252a}.search{display:flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:0 11px;margin-bottom:16px;color:var(--muted)}.search span{font-size:21px}.search input{width:100%;border:0;background:none;padding:10px 0;outline:none;font-size:12px;color:#444}.thread-list{flex:1;min-height:0;overflow:auto}.thread{width:100%;border:1px solid transparent;background:transparent;text-align:left;padding:14px 12px;border-radius:11px;margin-bottom:5px;color:#3d444b}.thread:hover{background:#e9ecef}.thread.selected{background:#fff;border-color:#e0e5e8;box-shadow:0 2px 6px #00000003}.thread-title{display:block;font-size:13px;line-height:1.55;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.thread-summary{display:block;font-size:11px;color:#8b9198;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;line-height:1.6;margin:5px 0 8px}.thread-meta{display:flex;align-items:center;gap:7px;font-size:10px;color:#949aa1}.thread-meta .dot{width:5px;height:5px}.thread.selected .thread-title{color:#186147}.connection{display:flex;gap:10px;align-items:center;border-top:1px solid var(--line);padding:20px 10px 8px;margin-top:12px}.connection strong{font-weight:500;font-size:11px;display:block;color:#5e686d}.connection span:not(.dot){display:block;font-size:10px;color:#92999f;margin-top:4px}.logout{background:transparent;border:0;text-align:left;color:#90979e;font-size:11px;padding:10px 27px}.main{display:flex;flex:1;min-width:0;position:relative;flex-direction:column;background:#fff}.chat-header{height:92px;flex:none;display:flex;align-items:center;padding:20px 36px;gap:14px;border-bottom:1px solid #edf0f2}.chat-heading{flex:1;min-width:0}.chat-heading h2{font-size:17px;font-weight:600;margin:0 0 8px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.chat-meta{display:flex;gap:12px;align-items:center;font-size:10px;color:#959ca3}.chat-meta>span:first-child{color:#4e806b}.chat-meta>span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:Consolas,monospace}.messages{flex:1;min-height:0;overflow:auto;padding:30px max(32px,calc((100% - 840px)/2));scroll-behavior:smooth;overscroll-behavior:contain}.empty{display:flex;flex-direction:column;align-items:center;text-align:center;justify-content:center;height:100%;min-height:220px;color:#8c949a}.empty>span{font-size:40px;color:#b4c9be;margin-bottom:16px}.empty h3{font-size:20px;font-weight:500;color:#5b6761;margin:0 0 12px}.empty p{font-size:13px;line-height:1.9;margin:0}.message{margin:0 0 27px;max-width:100%}.message-label{display:flex;align-items:center;gap:8px;font-size:10px;color:#8e989f;font-weight:600;letter-spacing:.2px;margin-bottom:10px}.avatar{width:22px;height:22px;background:#25372b;color:#fff;border-radius:6px;display:grid;place-items:center;font-size:11px}.message.user{margin-left:12%;}.message.user .message-label{justify-content:flex-end}.message-body{font-size:14px;line-height:1.85;white-space:pre-wrap;overflow-wrap:anywhere;color:#364047}.message.user .message-body{background:#f1f4f2;border:1px solid #e9eeeb;border-radius:14px 3px 14px 14px;padding:15px 18px}.message.commentary .message-body{color:#737e83;font-size:13px}.message-body pre{white-space:pre;overflow:auto;background:#f5f7f8;border:1px solid #e8ecee;border-radius:10px;padding:16px;font-size:12px;line-height:1.7;font-family:Consolas,monospace}.older-wrap{text-align:center;margin-bottom:28px}.older{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 14px;font-size:11px;color:#7d858c}.notice{margin:10px 30px 0;padding:10px 14px;border-radius:9px;background:var(--soft);color:#48775f;font-size:12px;line-height:1.55}.notice.error-notice{color:#a3433b;background:#fff1ee}.composer-area{padding:16px max(30px,calc((100% - 840px)/2)) max(15px,env(safe-area-inset-bottom));background:#fff;flex:none}.composer{border:1px solid #dfe5e3;box-shadow:0 3px 14px #223a2906;border-radius:16px;padding:15px 17px 12px}.composer:focus-within{border-color:#95bba8}.composer textarea{resize:vertical;min-height:64px;max-height:180px;width:100%;outline:none;border:0;background:none;color:#303a35;font-size:14px;line-height:1.65;padding:0}.composer textarea::placeholder{color:#a0a8a5}.composer-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:9px}.composer-bottom>span{font-size:10px;color:#9ba49f}.send{min-height:36px;padding:8px 15px;border-radius:8px;font-size:12px}.footer-meta{display:flex;justify-content:space-between;padding:11px 3px 0;font-size:10px;color:#a3aaa7}.jump-latest{position:absolute;bottom:225px;left:50%;transform:translateX(-50%);border:1px solid var(--line);border-radius:20px;padding:8px 14px;background:#fff;box-shadow:0 3px 15px #0001;font-size:11px;color:#65756b}.mobile{display:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1450px){.sidebar{width:320px}}@media(max-width:760px){.sidebar{width:280px;position:fixed;inset:0 auto 0 0;z-index:12;transform:translateX(-100%);transition:transform .18s ease;padding-top:22px}.sidebar.open{transform:translateX(0)}.mobile{display:grid}.side-brand .mobile{margin-left:auto}.scrim{position:fixed;inset:0;background:#17271c55;border:0;z-index:11;width:100%;height:100%}.chat-header{height:80px;padding:16px 14px;gap:10px}.chat-heading h2{font-size:14px}.chat-meta{font-size:9px;gap:8px}.messages{padding:22px 18px}.message-body{font-size:13px}.message.user{margin-left:7%}.composer-area{padding:10px 13px max(12px,env(safe-area-inset-bottom))}.composer{padding:13px;border-radius:13px}.composer textarea{font-size:16px;min-height:53px;max-height:120px}.composer-bottom>span{font-size:9px;max-width:68%}.footer-meta{font-size:9px;padding-top:8px}.notice{margin:8px 13px 0;font-size:11px}.jump-latest{bottom:200px}.pair-card{padding:30px;border-radius:20px}h1{font-size:34px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}