*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;height:100vh;overflow:hidden;background:#fafafa}#root{height:100vh}.container{display:flex;height:100vh}.sidebar{width:280px;background:#fff;border-right:1px solid #e0e0e0;display:flex;flex-direction:column;transition:transform .3s}.sidebar-header{padding:20px 16px;border-bottom:1px solid #e8e8e8}.logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,#CC9B6D 0%,#B8845C 100%);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}.logo-text{font-size:18px;font-weight:700;color:#1a1a1a}.new-chat-btn{width:100%;padding:12px 16px;background:#2f2f2f;color:#fff;border:none;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}.new-chat-btn:hover{background:#1a1a1a}.sidebar-nav{flex:1;overflow-y:auto;padding:12px}.nav-section{margin-bottom:24px}.nav-section-title{padding:8px 12px;font-size:11px;font-weight:700;color:#888;text-transform:uppercase}.nav-item{padding:11px 14px;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:12px;color:#2f2f2f;font-size:14px;font-weight:500;transition:all .15s;margin-bottom:3px;width:100%;background:none;border:none;text-align:left}.nav-item:hover{background:#f7f7f7}.nav-item.active{background:#f0ede8;font-weight:600}.nav-item .badge{margin-left:auto;background:#e8e8e8;color:#666;font-size:11px;padding:2px 8px;border-radius:10px}.chat-item{padding:10px 14px;border-radius:8px;cursor:pointer;font-size:13px;color:#444;transition:all .15s;margin-bottom:2px;width:100%;background:none;border:none;text-align:left}.chat-item:hover{background:#f7f7f7}.chat-item.active{background:#f0ede8;font-weight:600}.sidebar-footer{padding:16px;border-top:1px solid #e8e8e8}.user-profile{display:flex;align-items:center;gap:12px;padding:10px}.user-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:14px}.user-info{flex:1}.user-name{font-size:14px;font-weight:600;color:#1a1a1a}.user-email{font-size:12px;color:#888}.main-area{flex:1;display:flex;flex-direction:column}.chat-header{padding:16px 32px;border-bottom:1px solid #e8e8e8;background:#fafafa}.chat-title{font-size:15px;font-weight:600;color:#1a1a1a}.chat-model{font-size:12px;color:#888;margin-top:2px}.chat-messages{flex:1;overflow-y:auto;padding:32px}.messages-container{max-width:780px;margin:0 auto}.message{display:flex;gap:16px;margin-bottom:28px;animation:msgSlide .3s ease}@keyframes 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#e0e0e0;border-radius:6px;font-size:12px;cursor:pointer;color:#666}.action-btn:hover{background:#f7f7f7}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:#888;text-align:center}.empty-state h2{font-size:24px;color:#2f2f2f;margin-bottom:8px}.chat-input-area{padding:20px 32px 24px;border-top:1px solid #e8e8e8;background:#fafafa}.input-wrapper{max-width:780px;margin:0 auto}.input-container{background:white;border:2px solid #e0e0e0;border-radius:14px;padding:4px;position:relative}.input-container:focus-within{border-color:#cc9b6d}.chat-input{width:100%;min-height:52px;max-height:200px;padding:14px 60px 14px 18px;border:none;font-size:15px;font-family:inherit;resize:none;outline:none}.input-actions{position:absolute;right:10px;bottom:10px}.send-btn{width:36px;height:36px;background:#2f2f2f;color:#fff;border:none;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center}.send-btn:hover{background:#1a1a1a}.typing-indicator{display:flex;gap:4px;padding:12px 0}.typing-dot{width:8px;height:8px;background:#aaa;border-radius:50%;animation:typing 1.4s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-10px)}}.mobile-menu-btn{display:none;position:fixed;top:16px;left:16px;width:40px;height:40px;background:white;border:1px solid #e5e5e5;border-radius:8px;cursor:pointer;z-index:1000}.overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.3);z-index:998}.overlay.active{display:block}@media (max-width: 768px){.sidebar{position:fixed;left:0;top:0;height:100vh;z-index:999;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.mobile-menu-btn{display:flex;align-items:center;justify-content:center}.chat-messages{padding:80px 16px 16px}}:root{color-scheme:light}