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.14s;display:flex}.sb2-item:hover{background:var(--bg-hover);color:var(--text-primary)}.sb2-item.active{background:var(--bg-hover);color:var(--text-primary);box-shadow:inset 3px 0 0 var(--accent-color);font-weight:600}[data-theme=dark] .sb2-item.active{box-shadow:inset 2px 0 #ffffff8c}.sb2-item-icon{opacity:.85;flex-shrink:0;font-size:18px}.sb2-item-label{white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;overflow:hidden}.sb2-item.soon{cursor:default;opacity:.55}.sb2-item.soon:hover{color:var(--text-muted);background:0 0}.sb2-badge,.sb2-soon{letter-spacing:.3px;border-radius:20px;flex-shrink:0;padding:2px 6px;font-size:8.5px;font-weight:700}.sb2-badge{color:var(--rheem-navy);background:#fff}.sb2-soon{border:1px solid var(--border-subtle);color:var(--text-muted)}.sb2-divider{background:var(--border-subtle);height:1px;margin:9px 8px}.sb2-footer{border-top:1px solid var(--border-subtle);flex-shrink:0;justify-content:space-between;align-items:center;gap:8px;padding:12px 14px 14px 18px;line-height:1.5;display:flex}.sb2-footer b{color:var(--text-primary);opacity:.8;font-size:13px;font-weight:600;display:block}.sb2-footer span{color:var(--text-muted);font-size:12px;display:block}.sb2-logout{width:30px;height:30px;color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:7px;justify-content:center;align-items:center;font-size:16px;display:flex}.sb2-logout:hover{color:var(--delete-hover-color);background:var(--delete-hover-bg)}.sb-bottom{border-top:1px solid var(--border-subtle);flex-direction:column;gap:2px;margin-top:auto;padding:8px 10px 16px;display:flex}.sb-bottom-btn{color:var(--text-muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:8px;align-items:center;gap:10px;padding:9px 10px;font-size:14px;transition:all .12s;display:flex}.sidebar.closed .sb-bottom-btn{justify-content:center}.sb-bottom-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sb-logout-btn:hover{color:var(--delete-hover-color)!important;background:var(--delete-hover-bg)!important}.main-topbar{border-bottom:1px solid var(--border-subtle);background:var(--bg-primary);flex-shrink:0;justify-content:space-between;align-items:center;height:56px;padding:0 20px;display:flex}.topbar-left{align-items:center;gap:0;display:flex}.topbar-logo-btn{border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);background:0 0;border:none;align-items:center;padding:4px;display:inline-flex}.topbar-logo-btn:hover{background:var(--bg-hover)}.topbar-brand-stack{flex-direction:column;justify-content:center;gap:1px;display:flex}.topbar-product-name{font-family:var(--font-brand);letter-spacing:-.035em;background:var(--welcome-title-gradient);-webkit-text-fill-color:transparent;color:#0000;-webkit-background-clip:text;background-clip:text;font-size:1.05rem;font-weight:700;line-height:1.15}.topbar-powered-by{color:var(--text-muted);letter-spacing:.2px;-webkit-text-fill-color:var(--text-muted);font-size:10px;font-weight:400;line-height:1}.topbar-divider{background:var(--border-color);flex-shrink:0;width:1px;height:20px;margin:0 12px}.topbar-right{align-items:center;gap:4px;display:flex}.model-select{border:1px solid var(--border-color);border-radius:var(--radius-sm);background-color:var(--bg-input);max-width:220px;height:32px;color:var(--text-primary);cursor:pointer;transition:var(--transition);margin-right:6px;padding:0 8px;font-size:13px}.model-select:hover:not(:disabled),.model-select:focus{border-color:var(--accent-color);outline:none}.model-select:disabled{opacity:.6;cursor:not-allowed}.model-select option{background:var(--bg-elevated);color:var(--text-primary)}@media (width<=768px){.model-select{max-width:130px;font-size:12px}}.theme-toggle-btn{border-radius:var(--radius-sm);width:36px;height:36px;color:var(--text-muted);cursor:pointer;transition:var(--transition);background:0 0;border:none;justify-content:center;align-items:center;font-size:15px;display:flex}.theme-toggle-btn:hover{background:var(--bg-hover);color:var(--toggle-hover-color)}.topbar-logout-btn:hover{color:#f87171!important;background:#ef44441a!important}.messages-area{flex-direction:column;flex:1;min-height:0;display:flex;overflow-y:auto}.messages-list{flex-direction:column;display:flex}.welcome-screen{flex:1;justify-content:center;align-items:center;padding:40px 20px;display:flex}.welcome-content{text-align:center;flex-direction:column;align-items:center;width:100%;max-width:600px;display:flex}.welcome-mascot{object-fit:contain;filter:drop-shadow(0 4px 16px #00000026);width:130px;height:130px;margin-bottom:1.5rem}.welcome-kicker{font-family:var(--font-brand);letter-spacing:.18em;text-transform:uppercase;color:var(--kicker-color);margin:0 0 1.25rem;font-size:.6875rem;font-weight:600}.welcome-title{font-family:var(--font-brand);letter-spacing:-.035em;background:var(--welcome-title-gradient);-webkit-text-fill-color:transparent;color:#0000;-webkit-background-clip:text;background-clip:text;max-width:18ch;margin:0 auto 1rem;font-size:clamp(2rem,4.5vw,2.75rem);font-weight:700;line-height:1.15}.welcome-subtitle{font-family:var(--font-brand);color:var(--text-muted);letter-spacing:-.005em;max-width:30rem;margin:0 auto;font-size:1rem;font-weight:400;line-height:1.6}.message-wrapper{flex-direction:row;align-items:flex-start;gap:12px;width:100%;max-width:960px;margin:0 auto;padding:14px 24px;display:flex}.message-wrapper.bot{justify-content:flex-start}.message-wrapper.user{flex-direction:row-reverse;justify-content:flex-start}.message-avatar{border-radius:var(--radius-sm);flex-shrink:0;justify-content:center;align-items:center;width:30px;height:30px;font-size:14px;font-weight:600;display:flex}.message-wrapper.user .message-avatar{background:var(--accent-gradient);color:#fff}.message-wrapper.bot .message-avatar{background:var(--bot-avatar-bg);color:#fff}.message-content{flex-direction:column;flex-shrink:1;gap:6px;min-width:0;max-width:min(900px,92%);display:flex}.message-wrapper.user .message-content{align-items:flex-end}.message-wrapper.bot .message-content{align-items:flex-start}.message-bubble{color:var(--text-primary);border-radius:var(--radius-lg);min-width:0;max-width:100%;padding:10px 14px;font-size:14.5px;line-height:1.65;position:relative;overflow:visible}.message-bubble p{margin:0}.markdown-body{word-wrap:break-word;overflow-wrap:break-word;min-width:0;max-width:100%;font-size:14.5px;line-height:1.7}.markdown-body p{margin:0 0 .6em}.markdown-body p:last-child{margin-bottom:0}.markdown-body strong{color:var(--text-primary);font-weight:600}.markdown-body em{font-style:italic}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{color:var(--text-primary);margin:1em 0 .5em;font-weight:600;line-height:1.3}.markdown-body h1:first-child,.markdown-body h2:first-child,.markdown-body h3:first-child{margin-top:0}.markdown-body h1{font-size:1.35em}.markdown-body h2{font-size:1.2em}.markdown-body h3{font-size:1.08em}.markdown-body ul,.markdown-body ol{margin:.5em 0;padding-left:1.6em}.markdown-body li{margin-bottom:.3em}.markdown-body li>p{margin-bottom:.25em}.markdown-body blockquote{border-left:3px solid var(--accent-color);color:var(--text-secondary);background:rgba(var(--accent-rgb), .05);border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:.5em 0;padding:.3em 1em}.markdown-body hr{border:none;border-top:1px solid var(--border-color);margin:1em 0}.markdown-body a{color:var(--accent-color);text-decoration:none}.markdown-body a:hover{text-decoration:underline}.inline-code{background:var(--bg-hover);border:1px solid var(--border-color);color:var(--accent-color);word-break:break-all;border-radius:5px;padding:.15em .45em;font-family:Cascadia Code,Fira Code,Consolas,monospace;font-size:.88em}.code-block-wrapper{border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-elevated);color:var(--text-primary);margin:.6em 0;overflow:hidden}.code-block-header{color:var(--text-secondary);background:var(--bg-secondary);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:6px 12px;font-size:12px;font-weight:500;display:flex}.code-copy-btn{color:var(--text-secondary);cursor:pointer;transition:var(--transition);background:0 0;border:none;border-radius:4px;align-items:center;padding:2px 6px;font-size:12px;display:flex}.code-copy-btn:hover{background:var(--border-color);color:var(--text-primary)}.code-copy-btn:focus-visible{outline:2px solid var(--accent-color);outline-offset:2px}.code-block-wrapper pre{color:var(--text-primary);margin:0;padding:12px 16px;font-family:Cascadia Code,Fira Code,Consolas,monospace;font-size:13px;line-height:1.6;overflow-x:auto}.code-block-wrapper pre code{font-family:inherit}.markdown-body table{border-collapse:collapse;border:1px solid var(--border-color);border-radius:8px;width:100%;margin:.6em 0;font-size:14px;display:block;overflow-x:auto}.markdown-body thead{background:var(--bg-hover)}.markdown-body th{text-align:left;color:var(--text-primary);border-bottom:2px solid var(--border-color);padding:8px 12px;font-weight:600}.markdown-body td{border-bottom:1px solid var(--border-color);color:var(--text-secondary);padding:8px 12px}.markdown-body tr:last-child td{border-bottom:none}.markdown-body tbody tr:hover{background:rgba(var(--accent-rgb), .04)}.message-bubble.user{background:var(--user-bubble-bg);border:1px solid var(--user-bubble-border);color:var(--user-bubble-text);border-bottom-right-radius:4px}.message-bubble.bot{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-bottom-left-radius:4px}.message-bubble.bot.error{background:#ef444414;border-color:#ef44448c}.message-plain{white-space:pre-wrap;word-break:break-word;margin:0}.message-time{color:var(--text-muted);padding:0 4px;font-size:12px}.copy-btn{background:var(--bg-primary);border:1px solid var(--border-color);width:28px;height:28px;color:var(--text-muted);cursor:pointer;opacity:0;transition:var(--transition);border-radius:6px;justify-content:center;align-items:center;display:flex;position:absolute;top:8px;right:8px}.message-wrapper:hover .copy-btn{opacity:1}.copy-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.message-feedback-row{align-items:center;gap:8px;min-height:28px;padding:2px 4px 0;display:flex}.feedback-btn{border:1px solid var(--border-color);background:var(--bg-primary);width:32px;height:32px;color:var(--text-muted);cursor:pointer;transition:var(--transition);border-radius:8px;justify-content:center;align-items:center;display:flex}.feedback-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--focus-ring,var(--accent))}.message-feedback-thanks{color:var(--text-muted);font-size:12px}.input-area{background:var(--bg-primary);justify-content:center;padding:12px 24px 20px;display:flex}.chat-input-wrapper{width:100%;max-width:720px}.chat-input-full{background:var(--bg-input);border:1.5px solid var(--border-color);box-shadow:var(--shadow-md);border-radius:16px;flex-direction:column;transition:border-color .2s,box-shadow .2s;display:flex;overflow:hidden}.chat-input-full:focus-within{border-color:var(--accent-color);box-shadow:var(--focus-ring), var(--shadow-lg)}.input-toolbar{gap:2px;padding:6px 14px 0;display:flex}.toolbar-btn{border-radius:var(--radius-sm);width:30px;height:30px;color:var(--text-muted);cursor:pointer;transition:var(--transition);background:0 0;border:none;justify-content:center;align-items:center;font-size:14px;display:flex}.toolbar-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.toolbar-btn.voice.recording{background:var(--recording-bg);color:var(--recording-color);animation:1.5s infinite recordingPulse}.input-main{padding:2px 14px}.input-main textarea{width:100%;font-family:var(--font-brand);color:var(--text-primary);resize:none;box-sizing:border-box;background:0 0;border:none;outline:none;min-height:28px;max-height:150px;padding:2px 0;font-size:14px;line-height:1.45}.input-main textarea::placeholder{color:var(--text-muted);font-weight:400}.input-actions{justify-content:space-between;align-items:center;padding:2px 14px 6px;display:flex}.send-btn-large{background:var(--accent-color);border-radius:var(--radius-md);color:#fff;cursor:pointer;border:none;justify-content:center;align-items:center;width:34px;height:34px;font-size:14px;transition:background .2s,transform .15s,box-shadow .2s;display:flex}.send-btn-large:hover:not(.disabled){background:var(--send-hover-bg);box-shadow:0 2px 8px rgba(var(--accent-rgb), .3);transform:translateY(-1px)}.send-btn-large:active:not(.disabled){transform:translateY(0)}.send-btn-large.disabled{background:var(--bg-hover);color:var(--text-muted);cursor:not-allowed}.input-footer{text-align:center;color:var(--text-muted);letter-spacing:.01em;margin-top:10px;font-size:11px}.attachment-preview-list{flex-wrap:wrap;gap:8px;padding:10px 16px 0;display:flex}.attachment-chip{background:var(--bg-hover);border:1px solid var(--border-color);border-radius:10px;align-items:center;gap:8px;max-width:220px;padding:6px 10px;display:flex;position:relative}.attachment-chip.image{padding:4px}.attachment-thumb{object-fit:cover;border-radius:8px;width:56px;height:56px}.attachment-file-icon{color:var(--accent-color);flex-shrink:0;font-size:18px}.attachment-info{flex-direction:column;min-width:0;display:flex}.attachment-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;max-width:120px;font-size:12px;font-weight:500;overflow:hidden}.attachment-size{color:var(--text-muted);font-size:11px}.attachment-remove{background:var(--border-color);width:20px;height:20px;color:var(--text-primary);cursor:pointer;transition:var(--transition);border:none;border-radius:50%;justify-content:center;align-items:center;font-size:10px;display:flex;position:absolute;top:-6px;right:-6px}.attachment-remove:hover{background:var(--delete-hover-color);color:#fff}.msg-attachments{flex-wrap:wrap;gap:8px;margin-bottom:4px;display:flex}.msg-attachment.image{border:1px solid var(--border-color);border-radius:12px;overflow:hidden}.msg-attachment-img{object-fit:cover;border-radius:12px;max-width:280px;max-height:200px;display:block}.msg-attachment-file{background:var(--bg-hover);border:1px solid var(--border-color);border-radius:10px;align-items:center;gap:8px;padding:8px 12px;display:flex}.msg-attachment-file-icon{color:var(--accent-color);flex-shrink:0;font-size:16px}.msg-attachment-file-info{flex-direction:column;min-width:0;display:flex}.msg-attachment-file-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;max-width:180px;font-size:13px;font-weight:500;overflow:hidden}.msg-attachment-file-size{color:var(--text-muted);font-size:11px}@keyframes recordingPulse{0%,to{box-shadow:0 0 #ef444466}50%{box-shadow:0 0 0 6px #ef444400}}.typing-indicator{gap:4px;padding:8px 0;display:flex}.typing-indicator span{background:var(--text-muted);border-radius:50%;width:8px;height:8px;animation:1.4s ease-in-out infinite bounce}.typing-indicator span:first-child{animation-delay:0s}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-8px)}}.typing-status-wrapper{flex-direction:column;gap:6px;display:flex}.typing-status-text{color:var(--text-muted);opacity:.85;align-items:center;gap:6px;font-size:.8rem;animation:.3s ease-in statusFadeIn;display:flex}.typing-status-text:before{content:"";background:var(--accent-color);border-radius:50%;width:6px;height:6px;animation:1.2s ease-in-out infinite statusPulse;display:inline-block}@keyframes statusFadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:.85;transform:translateY(0)}}@keyframes statusPulse{0%,to{opacity:.4;transform:scale(.9)}50%{opacity:1;transform:scale(1.1)}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@media (width<=1200px){.message-wrapper{padding:14px 20px}.input-area{padding:10px 20px 18px}}@media (width<=768px){.sidebar{z-index:1000;height:100vh;position:fixed;top:0;left:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.message-wrapper{padding:12px 16px}.input-area{padding:8px 12px 16px}.chat-input-full{border-radius:12px}.welcome-title{max-width:16ch;font-size:clamp(1.65rem,7vw,2.15rem)}.welcome-kicker{letter-spacing:.16em}}