:root{--bg:#f6f4ef;--paper:#fffefa;--text:#303e39;--muted:#89908a;--line:#e9e7df;--green:#477b65;--bubble:#e3eee3;--chat-size:15px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--text);background:#eeede7}*{box-sizing:border-box}body{margin:0}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:2px solid var(--green);outline-offset:4px}button{border:0;background:none;color:inherit}a{color:inherit;text-decoration:none}.app{display:flex;max-width:1440px;margin:auto;height:100vh;height:100dvh;background:var(--bg);position:relative;overflow:hidden}.sidebar{width:274px;flex-shrink:0;background:#efeee7;border-right:1px solid var(--line);padding:36px 22px 20px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;font-size:29px;margin:0 9px 35px}.brand span{font-size:21px;font-weight:650}.brand small{display:block;font-size:10px;letter-spacing:3px;color:var(--muted);font-weight:400;margin-top:5px}.new-chat{text-align:left;border:1px solid #d2d9cb;background:#f9faf3;border-radius:12px;padding:14px 16px;color:#426a55;font-size:13px}.side-caption{display:flex;justify-content:space-between;font-size:11px;letter-spacing:1px;color:var(--muted);padding:29px 12px 12px}.side-caption span{font-size:10px;border:1px solid #d9ddd2;border-radius:4px;padding:0 5px}.history{text-align:left;padding:15px 14px;border-radius:12px;margin:3px 0}.history b{display:block;font-size:13px;font-weight:500}.history span{display:block;font-size:11px;color:var(--muted);margin-top:8px}.history.selected{background:#e1e7d9}.side-note{margin:auto 12px 32px;padding-top:40px}.side-note>span{color:#99a686;font-size:28px}.side-note h3{font-weight:400;line-height:1.9;font-size:19px;color:#77866b}.side-note p{font-size:10px;line-height:1.9;color:#969b90}.side-settings{border-top:1px solid #dddfd5;text-align:left;padding:20px 10px 0;font-size:12px;color:#788171}main{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{height:92px;flex-shrink:0;display:flex;gap:13px;align-items:center;padding:0 38px;border-bottom:1px solid var(--line)}.avatar{background:#e9edda;border:1px solid #e2e7d3;width:39px;height:39px;border-radius:14px;display:grid;place-items:center;font-size:23px;flex-shrink:0}.avatar.small{width:45px;height:45px;border-radius:16px}.contact{flex:1}.contact h1{font-size:17px;margin:0;font-weight:600}.pill{font-size:9px;color:#8d927f;border:1px solid #dbdfd1;border-radius:5px;padding:3px 6px;font-weight:400;vertical-align:middle;margin-left:6px}.contact p{font-size:11px;color:var(--muted);margin:8px 0 0}.contact i{display:inline-block;width:5px;height:5px;border-radius:50%;background:#87a889;margin-right:6px}.icon-button{width:38px;height:38px;border-radius:10px;font-size:23px;color:#829085;display:inline-grid;place-items:center}.icon-button:hover{background:#e9ece2}.demo-strip{font-size:10px;color:#929585;padding:11px 20px;text-align:center;background:#f0f0e6}.demo-strip span{color:#7a8b70;margin-right:9px}.conversation{flex:1;overflow:auto;scroll-behavior:smooth;padding:0 42px 25px}.intro{text-align:center;color:#8b977c;padding:27px 0 21px;font-size:13px}.intro-mark{display:block;color:#aeb698;font-size:25px;margin-bottom:9px}.intro small{display:block;font-size:10px;color:#aaa99d;margin-top:8px}.day-label{text-align:center;font-size:10px;color:#aaa99e;margin-bottom:26px}.message{display:flex;gap:11px;max-width:720px;margin:0 auto 22px;align-items:flex-start}.message.user{flex-direction:row-reverse}.message.user .avatar{background:#ebdfce;border-color:#e6d9c5;font-size:19px}.message-main{max-width:76%;min-width:0}.sender{font-size:10px;color:#93998e;margin:1px 0 7px}.user .sender{text-align:right}.bubble{background:var(--paper);border:1px solid #ebe9e1;border-radius:3px 17px 17px 17px;padding:14px 18px;line-height:1.85;font-size:var(--chat-size);white-space:pre-wrap;overflow-wrap:anywhere;box-shadow:0 2px 3px #44440002}.user .bubble{background:var(--bubble);border-color:#dce8d9;border-radius:17px 3px 17px 17px}.message-time{font-size:9px;color:#a5a79b;margin:7px 3px 0}.user .message-time{text-align:right}.bubble.photo{padding:6px}.bubble img{display:block;max-width:230px;max-height:260px;object-fit:contain;border-radius:12px}.sticker-card{width:140px;min-height:134px;text-align:center;border-radius:22px;padding:19px 10px;background:#ecefdc}.sticker-card span{display:block;font-size:56px;line-height:1.1}.sticker-card strong{font-size:13px;display:block;margin-top:12px;letter-spacing:2px;color:#647957}.typing{color:#91a383;letter-spacing:4px}.composer-wrap{padding:8px 42px 18px;flex-shrink:0;background:linear-gradient(transparent,var(--bg) 15%)}.suggestions{display:flex;gap:8px;overflow:auto;scrollbar-width:none;padding:0 0 14px}.suggestions button{font-size:11px;white-space:nowrap;color:#7b8674;border:1px solid #e1e4d6;border-radius:18px;padding:8px 13px;background:#fafaf4}.suggestions button:hover{background:#edf1e5}.input-box{background:var(--paper);border:1px solid #e0e3d5;border-radius:17px;box-shadow:0 4px 20px #414d2e04;padding:14px 16px 8px}textarea{width:100%;resize:none;font:inherit;font-size:14px;line-height:1.7;max-height:108px;border:none;outline:none;background:transparent;color:var(--text);padding:0 3px}textarea::placeholder{color:#a4a89a}.input-bottom{display:flex;align-items:center;margin-top:8px}.tools{display:flex;gap:2px}.tools .icon-button{font-size:24px;width:34px;height:32px}.keyboard-hint{font-size:9px;color:#b0b3a5;margin-left:auto;margin-right:16px}.send{background:#527e63;color:white;border-radius:11px;font-size:23px;width:35px;height:35px;flex-shrink:0}.send:disabled{opacity:.4;cursor:default}.composer-footer{display:flex;justify-content:space-between;padding:10px 3px 0;font-size:9px;color:#a5aa98}.mobile-only{display:none}.backdrop{position:absolute;inset:0;background:#24382d30;z-index:10;backdrop-filter:blur(3px)}.sheet{position:absolute;z-index:12;bottom:25px;right:38px;width:380px;max-height:85%;overflow:auto;background:var(--paper);border:1px solid var(--line);border-radius:25px;padding:25px;box-shadow:0 15px 65px #26362224}.sheet-top{display:flex;justify-content:space-between;align-items:center}.sheet h2{font-weight:550;font-size:20px;margin:0}.sheet p{font-size:12px;color:#929986;line-height:1.8}.sticker-tabs{display:flex;gap:15px;border-bottom:1px solid var(--line);padding:15px 0;font-size:11px;color:#99a38d}.sticker-tabs span:first-child{color:#527e63}.sticker-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding-top:20px}.sticker-grid button{background:#f0f2e6;border-radius:15px;min-height:91px}.sticker-grid button span{display:block;font-size:34px}.sticker-grid button small{font-size:10px;color:#768669;display:block;margin-top:8px}.setting-row{padding:22px 0;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:12px}.setting-row b{font-size:13px;font-weight:500}.setting-row small{display:block;font-size:10px;color:var(--muted);margin-top:7px}.toggle{width:42px;height:25px;background:#d9ded2;border-radius:15px;padding:3px;flex-shrink:0}.toggle span{display:block;width:19px;height:19px;background:white;border-radius:50%;transition:transform .2s}.toggle[aria-checked=true]{background:var(--green)}.toggle[aria-checked=true] span{transform:translateX(17px)}.text-button{font-size:12px;color:var(--green);white-space:nowrap}.info-box{font-size:12px;background:#f1f3e9;border-radius:12px;padding:15px;margin-top:18px;line-height:1.8;color:#77886b}.info-box p{margin-bottom:0}.reset{margin-top:22px;color:#9a8270;font-size:12px}.toast{position:absolute;bottom:180px;left:50%;transform:translateX(-50%);background:#3c5349;color:white;padding:13px 20px;border-radius:13px;z-index:30;font-size:12px;max-width:90%;width:max-content;line-height:1.7;box-shadow:0 5px 20px #0002}.attachment{display:flex;align-items:center;gap:12px;font-size:11px;margin:0 0 10px}.attachment img{width:50px;height:50px;object-fit:cover;border-radius:8px}.attachment button{font-size:20px}[hidden]{display:none!important}@media(min-width:1250px){.conversation{padding-left:75px;padding-right:75px}.composer-wrap{padding-left:75px;padding-right:75px}}@media(max-width:700px){.app{width:100%;max-width:none}.sidebar{display:none;position:absolute;top:0;bottom:0;left:0;z-index:15;width:280px;box-shadow:10px 0 35px #0001}.sidebar.open{display:flex}.mobile-only{display:inline-grid}.topbar{height:76px;padding:0 15px;gap:9px}.topbar .avatar{width:39px;height:39px}.contact h1{font-size:16px}.contact p{font-size:10px}.pill{font-size:8px}.demo-strip{font-size:9px;padding:9px 8px}.conversation{padding:0 17px 15px}.intro{padding:22px 0 18px;font-size:12px}.message{gap:9px;margin-bottom:20px}.message-main{max-width:79%}.message .avatar{width:31px;height:31px;border-radius:11px;font-size:20px}.bubble{font-size:var(--chat-size);padding:11px 14px}.composer-wrap{padding:6px 14px max(10px,env(safe-area-inset-bottom))}.keyboard-hint{display:none}.send{margin-left:auto}.suggestions{padding-bottom:10px;gap:6px}.suggestions button{font-size:10px;padding:7px 10px}.input-box{padding:12px 12px 8px;border-radius:16px}.composer-footer{font-size:8px;padding-top:8px}.sheet{bottom:0;right:0;width:100%;border-radius:25px 25px 0 0;padding:24px 23px max(26px,env(safe-area-inset-bottom))}.toast{bottom:190px}.bubble img{max-width:195px}.sticker-card{width:126px;min-height:121px}.sticker-card span{font-size:48px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Compact chat layout */
:root{--bg:#f5f5f5;--paper:#fff;--text:#252525;--muted:#999;--line:#eaeaea;--green:#0099f6;--bubble:#ccecff;background:#f5f5f5}
.app{max-width:none}.sidebar{width:248px;padding:24px 12px 15px;background:#f0f0f0}.brand{font-size:25px;margin:0 12px 22px;gap:10px}.brand span{font-size:18px}.brand small{letter-spacing:0;color:#999}.new-chat{background:#fafafa;border-color:#e0e0e0;color:#777;padding:11px 12px;border-radius:7px;font-size:12px}.side-caption{padding:23px 12px 10px;color:#999}.history{border-radius:5px;margin:2px 0;padding:17px 12px}.history.selected{background:#e0e0e0}.history b{font-size:14px}.history span{color:#999}.side-settings{margin-top:auto;border-color:#e4e4e4;color:#777}.topbar{height:66px;padding:0 24px;gap:10px;background:#f7f7f7}.contact h1{font-size:17px;font-weight:500}.pill{border:0;background:#eaeaea;color:#999;padding:3px 6px;font-size:9px}.topbar .avatar{display:none}.conversation{padding:22px 26px 14px}.day-label{font-size:11px;margin:3px 0 25px;color:#aaa}.message{max-width:none;margin-bottom:25px;gap:10px}.message-main{max-width:76%}.message .avatar{width:34px;height:34px;border-radius:50%;font-size:21px;background:#e0eff7;border:0}.message.user .avatar{background:#e9e2d8;border:0}.sender{display:none}.bubble{border:0;border-radius:10px;box-shadow:none;font-size:var(--chat-size);padding:9px 13px;line-height:1.65}.user .bubble{border:0;border-radius:10px;background:#ccecff}.message-time{font-size:9px;color:#b0b0b0;margin-top:6px}.composer-wrap{border-top:1px solid #e8e8e8;padding:8px 20px 13px;background:#f5f5f5}.input-box{display:flex;flex-direction:column;background:none;border:0;border-radius:0;box-shadow:none;padding:0;position:relative;min-height:147px}.input-bottom{display:contents}.tools{order:0;gap:7px;margin-bottom:9px}.tools .icon-button{width:29px;height:29px;font-size:23px;color:#454545;border-radius:5px}textarea{order:1;min-height:61px;font-size:14px;padding:1px 4px;flex:1}.keyboard-hint{position:absolute;bottom:5px;right:93px;color:#aaa}.send{order:2;align-self:flex-end;margin-top:9px;width:74px;height:31px;border-radius:7px;font-size:12px;background:#009aff}.icon-button{color:#555}.icon-button:hover{background:#e7e7e7}.sheet{background:#fff;border-color:#e5e5e5;border-radius:14px;box-shadow:0 8px 35px #0002}.sheet p,.sticker-tabs{color:#999}.sticker-tabs span:first-child,.text-button{color:#009aff}.sticker-grid button{background:#f5f5f5}.sticker-card{background:#edf1f4}.info-box{background:#f5f5f5;color:#777}.sheet h2{font-size:18px}.toast{background:#444}.toggle[aria-checked=true]{background:#009aff}
@media(min-width:1250px){.conversation{padding-left:28px;padding-right:28px}.composer-wrap{padding-left:24px;padding-right:24px}}
@media(max-width:700px){.topbar{height:59px;padding:0 12px;background:#fafafa}.contact h1{text-align:center;font-size:17px}.topbar .icon-button{width:32px}.conversation{padding:20px 12px 10px}.message{gap:8px;margin-bottom:23px}.message-main{max-width:78%}.message .avatar{width:33px;height:33px;font-size:21px}.bubble{padding:10px 12px;border-radius:9px}.user .bubble{border-radius:9px}.composer-wrap{padding:9px 10px max(11px,env(safe-area-inset-bottom));background:#fafafa}.input-box{display:block;min-height:0;padding:0 66px 0 0}.input-bottom{display:block;margin:0}.tools{display:flex;margin:0;position:absolute;bottom:0;right:0;gap:0}.tools .icon-button{display:none}.tools #stickers{display:inline-grid;width:29px;height:29px;position:absolute;right:34px;bottom:45px}.tools #imageButton{display:inline-grid;width:29px;height:29px;position:absolute;right:0;bottom:45px}.send{position:absolute;right:0;bottom:0;width:57px;height:36px;margin:0;font-size:13px;border-radius:6px}textarea{display:block;width:100%;min-height:77px;max-height:125px;border:1px solid #eee;background:white;border-radius:7px;padding:10px;font-size:16px}.sheet{bottom:0;right:0;width:100%;border-radius:17px 17px 0 0}.sidebar{width:270px}.attachment{padding-top:0}.backdrop{backdrop-filter:none}}

.login-panel{position:absolute;inset:0;background:#f5f5f5;z-index:40;display:grid;place-items:center;padding:24px}.login-panel form{width:100%;max-width:350px;background:white;border-radius:16px;padding:26px}.login-panel h2{font-size:20px}.login-panel p{font-size:12px;line-height:1.8;color:#888}.login-panel label{display:block;font-size:13px;margin-top:18px}.login-panel input{display:block;width:100%;padding:12px;border:1px solid #ddd;border-radius:7px;margin-top:8px;font-size:16px}.login-panel button{background:#009aff;color:white;border-radius:7px;width:100%;padding:12px;margin-top:22px}#connectionStatus{line-height:1.8}.message-status{font-size:10px;color:#888}.retry-send{font-size:12px;color:#007dca}