:root{--nanao-primary: #3b82f6;--nanao-primary-hover: #2563eb;--nanao-bg: #ffffff;--nanao-bg-secondary: #f8fafc;--nanao-border: #e2e8f0;--nanao-text: #1e293b;--nanao-text-secondary: #64748b;--nanao-user-bg: #3b82f6;--nanao-user-text: #ffffff;--nanao-assistant-bg: #f1f5f9;--nanao-assistant-text: #1e293b;--nanao-error-bg: #fef2f2;--nanao-error-text: #dc2626;--nanao-error-border: #fecaca;--nanao-shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--nanao-radius: 12px;--nanao-radius-sm: 8px}.nanao-chat-widget{display:flex;flex-direction:column;max-width:800px;height:600px;margin:0 auto;background:var(--nanao-bg);border:1px solid var(--nanao-border);border-radius:var(--nanao-radius);box-shadow:var(--nanao-shadow);overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.5;color:var(--nanao-text)}.nanao-chat-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--nanao-bg);border-bottom:1px solid var(--nanao-border)}.nanao-chat-title{margin:0;font-size:18px;font-weight:600;color:var(--nanao-text)}.nanao-chat-clear-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;background:transparent;border:1px solid var(--nanao-border);border-radius:var(--nanao-radius-sm);color:var(--nanao-text-secondary);cursor:pointer;transition:all .15s ease}.nanao-chat-clear-btn:hover{background:var(--nanao-bg-secondary);color:var(--nanao-text);border-color:var(--nanao-text-secondary)}.nanao-chat-error{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--nanao-error-bg);border-bottom:1px solid var(--nanao-error-border);color:var(--nanao-error-text);font-size:13px}.nanao-chat-error-dismiss{padding:0;width:24px;height:24px;background:transparent;border:none;color:var(--nanao-error-text);cursor:pointer;font-size:20px;line-height:1;opacity:.7}.nanao-chat-error-dismiss:hover{opacity:1}.nanao-chat-messages{flex:1;overflow-y:auto;padding:20px;background:var(--nanao-bg-secondary)}.nanao-chat-empty{display:flex;align-items:center;justify-content:center;height:100%;color:var(--nanao-text-secondary);text-align:center}.nanao-chat-empty p{margin:0;padding:20px}.nanao-chat-message{display:flex;gap:12px;margin-bottom:16px}.nanao-chat-message:last-child{margin-bottom:0}.nanao-chat-message-user{flex-direction:row-reverse}.nanao-chat-message-avatar{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--nanao-border);border-radius:50%;color:var(--nanao-text-secondary)}.nanao-chat-message-user .nanao-chat-message-avatar{background:var(--nanao-primary);color:var(--nanao-user-text)}.nanao-chat-message-content{max-width:70%}.nanao-chat-message-text{padding:12px 16px;border-radius:var(--nanao-radius);white-space:pre-wrap;word-break:break-word}.nanao-chat-message-user .nanao-chat-message-text{background:var(--nanao-user-bg);color:var(--nanao-user-text);border-bottom-right-radius:4px}.nanao-chat-message-assistant .nanao-chat-message-text{background:var(--nanao-bg);color:var(--nanao-assistant-text);border:1px solid var(--nanao-border);border-bottom-left-radius:4px}.nanao-chat-message-time{margin-top:4px;font-size:11px;color:var(--nanao-text-secondary)}.nanao-chat-message-user .nanao-chat-message-time{text-align:right}.nanao-chat-loading{display:flex;gap:12px;margin-bottom:16px}.nanao-chat-loading:before{content:"";flex-shrink:0;width:36px;height:36px;background:var(--nanao-border);border-radius:50%}.nanao-chat-loading-dots{display:flex;align-items:center;gap:4px;padding:12px 16px;background:var(--nanao-bg);border:1px solid var(--nanao-border);border-radius:var(--nanao-radius);border-bottom-left-radius:4px}.nanao-chat-loading-dots span{width:8px;height:8px;background:var(--nanao-text-secondary);border-radius:50%;animation:nanao-bounce 1.4s infinite ease-in-out both}.nanao-chat-loading-dots span:nth-child(1){animation-delay:-.32s}.nanao-chat-loading-dots span:nth-child(2){animation-delay:-.16s}@keyframes nanao-bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.nanao-chat-input-container{display:flex;gap:12px;padding:16px 20px;background:var(--nanao-bg);border-top:1px solid var(--nanao-border)}.nanao-chat-input{flex:1;padding:12px 16px;background:var(--nanao-bg-secondary);border:1px solid var(--nanao-border);border-radius:var(--nanao-radius-sm);font-family:inherit;font-size:14px;line-height:1.5;color:var(--nanao-text);resize:none;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.nanao-chat-input::placeholder{color:var(--nanao-text-secondary)}.nanao-chat-input:focus{border-color:var(--nanao-primary);box-shadow:0 0 0 3px #3b82f61a}.nanao-chat-input:disabled{background:var(--nanao-border);cursor:not-allowed}.nanao-chat-send-btn{display:flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;background:var(--nanao-primary);border:none;border-radius:var(--nanao-radius-sm);color:#fff;cursor:pointer;transition:background-color .15s ease}.nanao-chat-send-btn:hover:not(:disabled){background:var(--nanao-primary-hover)}.nanao-chat-send-btn:disabled{background:var(--nanao-border);color:var(--nanao-text-secondary);cursor:not-allowed}.nanao-access-denied{padding:40px 20px;text-align:center;background:var(--nanao-bg-secondary);border:1px solid var(--nanao-border);border-radius:var(--nanao-radius)}.nanao-access-denied p{margin:0 0 16px;color:var(--nanao-text)}.nanao-access-denied .button{display:inline-block;padding:10px 20px;background:var(--nanao-primary);color:#fff;text-decoration:none;border-radius:var(--nanao-radius-sm);font-weight:500;transition:background-color .15s ease}.nanao-access-denied .button:hover{background:var(--nanao-primary-hover)}@media (max-width: 640px){.nanao-chat-widget{height:calc(100vh - 100px);min-height:400px;border-radius:0;border-left:none;border-right:none}.nanao-chat-message-content{max-width:85%}.nanao-chat-header,.nanao-chat-input-container{padding:12px 16px}.nanao-chat-messages{padding:16px}}.nanao-chat-messages::-webkit-scrollbar{width:6px}.nanao-chat-messages::-webkit-scrollbar-track{background:transparent}.nanao-chat-messages::-webkit-scrollbar-thumb{background:var(--nanao-border);border-radius:3px}.nanao-chat-messages::-webkit-scrollbar-thumb:hover{background:var(--nanao-text-secondary)}