:root{color:#202124;background:#f6f7f8;--button-border: #c9ced6;--button-hover: #eef2f7;--danger: #a32929;--primary: #2f64d6;--primary-hover: #2455bd;--focus-ring: #4c7fe5;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;overflow:hidden}button,input,textarea{font:inherit}button{border:1px solid var(--button-border);border-radius:6px;background:#fff;color:#202124;cursor:pointer;min-height:36px;padding:8px 12px}button:hover:not(:disabled){background:var(--button-hover)}button:active:not(:disabled){transform:translateY(1px)}button:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,textarea:focus-visible,input:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.button{display:inline-flex;align-items:center;justify-content:center;gap:7px;white-space:nowrap}.button-primary{border-color:var(--primary);background:var(--primary);color:#fff;font-weight:600}.button-primary:hover:not(:disabled){border-color:var(--primary-hover);background:var(--primary-hover)}.button-secondary{background:#fff}.button-ghost{border-color:transparent;background:transparent}.button-danger{color:var(--danger)}.button-danger:hover:not(:disabled){background:#fff0f0}.button-icon{width:36px;min-width:36px;padding:0}.button-icon-svg{width:18px;height:18px;flex:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.center,.auth-shell{min-height:100vh;display:grid;place-items:center}.auth-panel{width:min(420px,calc(100vw - 32px));background:#fff;border:1px solid #d9dee6;border-radius:8px;padding:28px;box-shadow:0 16px 40px #1f242c14}.e2ee-panel{position:relative}.auth-panel h1,.topbar h1{margin:0;font-size:22px}.auth-panel p{margin:24px 0 8px;color:#5f6673}.auth-panel strong{display:block;font-size:34px;letter-spacing:0}.access-form{margin-top:24px;display:grid;gap:12px}.access-form label{display:grid;gap:8px;color:#5f6673}.access-form input,.access-form textarea{width:100%;border:1px solid #c9ced6;border-radius:8px;padding:10px;color:#202124}.access-form textarea{min-height:104px;resize:vertical}.qr-video{width:100%;aspect-ratio:4 / 3;border:1px solid #d9dee6;border-radius:8px;background:#202124;object-fit:cover}.qr-actions{display:flex;gap:8px;margin-top:12px}.qr-actions button{flex:1}.qr-choice-actions{display:grid;gap:10px;margin-top:20px}.qr-choice-actions button{width:100%;padding:12px}.form-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.auth-error{margin:0;color:#a32929;font-size:13px}.auth-panel .auth-error{margin:12px 0 0}.app-shell{height:100%;min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto;overflow:hidden}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 20px;border-bottom:1px solid #dce1e8;background:#fff;z-index:1}.topbar-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.status{display:inline-block;margin-top:4px;font-size:13px}.push-status{display:block;color:#5f6673}.version-status{display:inline-flex;align-items:center;flex-wrap:wrap;gap:6px;margin-top:4px;margin-left:10px;color:#6a7280;font-size:12px}.auth-panel .version-status{margin:18px 0 0}.build-version{white-space:nowrap}.version-update{display:inline-flex;align-items:center;gap:6px;color:#8f2323}.version-reload{padding:3px 7px;font-size:12px}.online{color:#0f7b46}.offline{color:#9a4b18}.messages{min-height:0;overflow-y:auto;padding:20px}.message{position:relative;width:min(720px,100%);margin:0 auto 12px;border:1px solid #dce1e8;border-radius:8px;background:#fff;padding:12px 48px 12px 12px}.message.user{border-color:#9bb8ed}.message.bot{border-color:#8ecdb2}.message-meta{display:flex;justify-content:space-between;gap:16px;color:#6a7280;font-size:12px}.message p{margin:10px 0;white-space:pre-wrap}.message-body{margin-top:10px;display:grid;gap:8px}.message-body .message-text{margin:0}.message-image{display:block;width:min(420px,100%);max-height:360px;object-fit:contain;border:1px solid #dce1e8;border-radius:8px;background:#f6f7f8}.reply-chip,.reply-preview{border-left:3px solid #7b8da8;background:#f2f5f9;padding:8px;margin-top:8px}.reply-chip span,.reply-preview span{color:#4e5969;font-size:12px;font-weight:600}.reply-chip p,.reply-preview p{margin:4px 0 0;color:#3f4754;font-size:13px}.reply-button{position:absolute;top:8px;right:8px;width:30px;height:30px;padding:0}.composer{border-top:1px solid #dce1e8;background:#fff;padding:14px 20px;z-index:1}.composer-row{width:min(900px,100%);margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:stretch}.composer textarea{min-height:64px;resize:vertical;border:1px solid var(--button-border);border-radius:8px;padding:10px}.composer-actions{display:flex;align-items:stretch;gap:8px}.composer-actions .button{min-height:44px}.record-button{min-width:92px;-webkit-user-select:none;user-select:none;touch-action:none}.image-button{min-width:84px}.image-input{display:none}.record-button.active{border-color:#b43b3b;background:#fff1f1;color:#8f2323}.preview-clear{flex:none}.composer-error{width:min(900px,100%);margin:8px auto 0;color:#a32929;font-size:13px}.reply-preview,.image-preview{width:min(900px,100%);margin:0 auto 10px;display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.image-preview{border:1px solid #dce1e8;border-radius:8px;background:#f7f9fc;padding:8px;align-items:center}.image-preview img{width:72px;height:72px;object-fit:cover;border-radius:6px;border:1px solid #dce1e8;background:#fff}.image-preview span{color:#4e5969;font-size:13px;font-weight:600;word-break:break-word}.image-preview p{margin:4px 0 0;color:#6a7280;font-size:12px}.error{color:#a32929}.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}@media(max-width:640px){.topbar{align-items:flex-start}.composer,.topbar,.messages{padding:12px}.composer-row{grid-template-columns:1fr;gap:8px}.composer textarea{min-height:56px;resize:none}.composer-actions{width:100%}.composer-actions .button{min-height:40px}.record-button{min-width:0;flex:1}.image-button,.send-button{width:42px;min-width:42px;padding-inline:0}.mobile-optional-label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}}