:root{font-family:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:#202127;background:#F7F7F8;font-synthesis:none;--accent:#002FA7;--line:#e7e7eb;--muted:#6c6d77}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input,textarea{ -webkit-tap-highlight-color:transparent }button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button{border:0;background:transparent}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,.history:focus-visible{outline:2px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.muted{color:var(--muted)}.error{color:#b32336;font-size:13px;line-height:1.6;margin:0}.error:empty{display:none}.primary{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:0 23px;background:#3673fe;color:#fff;border-radius:8px;font-weight:600}.primary:hover:not(:disabled){background:#2b62e0}.quiet{min-height:44px;padding:8px 12px;color:var(--muted);border-radius:6px}.quiet:hover{background:#F7F7F8;color:#202127}svg{height:21px;width:21px;flex-shrink:0}
.login-layout{display:grid;grid-template-columns:1fr;background:#fff;min-height:100dvh}.login-panel{padding:48px;display:flex;align-items:center;justify-content:center}.login-panel form{width:100%;max-width:340px}.login-panel h2{font-size:29px;letter-spacing:-1px;margin:0 0 12px;font-weight:600}.login-panel .muted{font-size:14px;margin:0 0 40px}.login-panel label{display:block;font-size:14px;font-weight:500;margin:22px 0 10px}.login-panel input{width:100%;height:50px;padding:0 14px;border:1px solid #dcdce1;border-radius:7px;background:#fff;color:#202127}.login-panel input::placeholder{color:#9899a1}.login-panel .error{margin-top:16px}.login-button{width:100%;margin-top:28px;height:50px}
.chat-shell{max-width:960px;margin:24px auto;height:calc(100dvh - 48px);display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.chat-header{padding:19px 28px;display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid var(--line)}.peer-info{display:flex;align-items:center;gap:12px;min-width:0}.peer-info>div{min-width:0}.peer-info h1{font-size:17px;line-height:1.4;margin:0 0 3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.peer-info p{font-size:12px;margin:0}.avatar{width:42px;height:42px;flex-shrink:0;display:grid;place-items:center;background:#F7F7F8;border:1px solid var(--line);color:var(--accent);font-size:18px;border-radius:12px}.header-actions{display:flex;align-items:center;gap:5px;flex-shrink:0;font-size:13px}#my-name{max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-right:8px}.history{padding:22px 28px;flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin}.older{display:block;margin:0 auto 20px;font-size:12px}.empty-state{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);padding:32px 0}.empty-state h2{font-size:18px;color:#43444d;font-weight:500;margin:20px 0 10px}.empty-state p{font-size:13px;margin:0}.empty-mark{height:42px;width:50px;border:1px solid #dcdce1;border-radius:12px 12px 12px 0;position:relative}.empty-mark:after{content:"";position:absolute;width:22px;height:1px;background:#b7b8c2;left:13px;top:20px}.message{margin:0 0 23px;display:flex;flex-direction:column;align-items:flex-start}.message.mine{align-items:flex-end}.message-meta{display:flex;flex-wrap:wrap;gap:8px;max-width:90%;font-size:12px;line-height:1.6;margin-bottom:7px;color:var(--muted)}.message-meta time{color:#81828b;font-variant-numeric:tabular-nums}.message.mine .message-meta{flex-direction:row-reverse}.bubble{background:#F7F7F8;color:#292a31;border:1px solid var(--line);border-radius:2px 12px 12px 12px;padding:11px 15px;max-width:78%;min-width:38px}.mine .bubble{background:#f2faf3;color:#292a31;border-color:#e2eee4;border-radius:12px 2px 12px 12px}.message-text{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.65;margin:0}.message-image{display:block;padding:0;max-width:100%;border-radius:5px;cursor:zoom-in}.bubble img{display:block;max-width:100%;width:260px;max-height:320px;object-fit:contain;border-radius:5px}.bubble .message-text+ .message-image{margin-top:10px}.composer{border-top:1px solid var(--line);padding:17px 28px 20px}.composer textarea{display:block;resize:none;border:0;background:transparent;width:100%;height:63px;max-height:150px;padding:3px 0;color:#202127;font-size:16px;line-height:1.5}.composer textarea:focus{outline:none}.composer:focus-within{border-top-color:#9cafd9}.composer-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:9px}.image-tools{display:flex;align-items:center;gap:14px;min-width:0}.image-button{display:flex;align-items:center;gap:7px;padding:10px 0;min-height:44px;color:#555660;font-size:13px}.image-button:hover{color:var(--accent)}.input-hint{font-size:11px;color:var(--muted)}.image-preview{display:flex;align-items:center;gap:12px;margin-bottom:12px;font-size:12px}.image-preview img{height:64px;width:80px;object-fit:cover;border:1px solid var(--line);border-radius:6px}.composer .error{margin-bottom:9px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}dialog{border:1px solid var(--line);border-radius:12px;padding:28px;max-width:min(440px,calc(100vw - 32px));color:#202127}dialog::backdrop{background:rgb(0 0 0 / .3)}dialog h2{margin:0 0 15px;font-size:21px}dialog p{line-height:1.7;color:var(--muted);font-size:14px}.dialog-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:25px}
@media(max-width:700px){.login-panel{padding:34px 25px}.login-panel form{max-width:420px}.login-panel h2{font-size:24px}.login-panel .muted{margin-bottom:28px}.chat-shell{margin:0;width:100%;height:100dvh;border:0;border-radius:0}.chat-header{padding:12px 15px;padding-top:max(12px,env(safe-area-inset-top));gap:7px}.header-actions{gap:0;font-size:12px}.header-actions .quiet{padding:8px}.peer-info{gap:9px}.peer-info h1{font-size:16px}.avatar{width:36px;height:36px;font-size:16px}#my-name{display:none}.history{padding:20px 16px}.bubble{max-width:88%}.message-meta{font-size:11px}.composer{padding:12px 16px;padding-bottom:max(12px,env(safe-area-inset-bottom))}.input-hint{display:none}.composer textarea{height:52px}.composer-toolbar{margin-top:4px}.primary{padding:0 19px}.message{margin-bottom:21px}}

.image-dialog{padding:12px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 32px);border-radius:12px;background:#fff}.image-dialog::backdrop{background:rgb(0 0 0 / .7)}.image-dialog form{display:flex;justify-content:flex-end;margin-bottom:8px}.image-dialog img{display:block;max-width:100%;max-height:calc(100dvh - 122px);width:auto;height:auto;object-fit:contain;margin:auto}

.key-help{font-size:12px;line-height:1.6;color:var(--muted);margin:10px 0 0}