*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #6366f1;--primary-hover: #4f46e5;--bg: #0f172a;--bg-secondary: #1e293b;--bg-input: #334155;--text: #f8fafc;--text-secondary: #94a3b8;--border: #334155;--success: #22c55e}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}.header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.header-left{display:flex;align-items:center;gap:16px}.logo{font-size:24px;font-weight:700;background:linear-gradient(135deg,var(--primary),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.model-name{font-size:12px;color:var(--text-secondary);background:var(--bg-input);padding:4px 12px;border-radius:12px}.header-right{display:flex;gap:8px}.btn{padding:8px 16px;border:none;border-radius:8px;font-size:14px;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{background:var(--bg-input);color:var(--text)}.btn-secondary:hover{background:var(--border)}.main{display:flex;flex-direction:column;height:calc(100vh - 65px)}.chat-container{flex:1;overflow-y:auto;padding:24px}.welcome{text-align:center;padding:60px 20px}.welcome-icon{font-size:64px;margin-bottom:16px}.welcome h2{font-size:28px;margin-bottom:8px}.welcome p{color:var(--text-secondary);margin-bottom:32px}.quick-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;max-width:600px;margin:0 auto}.action-btn{padding:12px 20px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:12px;color:var(--text);cursor:pointer;transition:all .2s;font-size:14px}.action-btn:hover{background:var(--bg-input);border-color:var(--primary)}.messages{display:flex;flex-direction:column;gap:16px;max-width:800px;margin:0 auto}.message{display:flex;gap:12px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}.message.user .message-avatar{background:var(--primary)}.message.assistant .message-avatar{background:var(--bg-secondary);border:1px solid var(--border)}.message-content{flex:1;background:var(--bg-secondary);padding:12px 16px;border-radius:12px;line-height:1.6;white-space:pre-wrap}.message.user .message-content{background:var(--primary)}.input-area{padding:16px 24px;background:var(--bg-secondary);border-top:1px solid var(--border)}.input-wrapper{display:flex;gap:12px;align-items:flex-end;max-width:800px;margin:0 auto}.input{flex:1;background:var(--bg-input);border:1px solid var(--border);border-radius:12px;padding:12px 16px;color:var(--text);font-size:16px;resize:none;min-height:52px;max-height:200px;outline:none;transition:border-color .2s}.input:focus{border-color:var(--primary)}.send-btn{width:44px;height:44px;border-radius:12px;background:var(--primary);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.send-btn:hover:not(:disabled){background:var(--primary-hover)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.input-footer{display:flex;justify-content:space-between;align-items:center;max-width:800px;margin:8px auto 0;font-size:12px;color:var(--text-secondary)}.status{display:flex;align-items:center;gap:6px}.status:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success)}.modal{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.8);z-index:1000;align-items:center;justify-content:center}.modal.active{display:flex}.modal-content{background:var(--bg-secondary);border-radius:16px;width:90%;max-width:500px;max-height:90vh;overflow:hidden}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid var(--border)}.modal-header h3{font-size:18px}.close-btn{background:none;border:none;color:var(--text-secondary);font-size:24px;cursor:pointer}.close-btn:hover{color:var(--text)}.modal-body{padding:24px;display:flex;flex-direction:column;gap:16px}.setting-item{display:flex;flex-direction:column;gap:8px}.setting-item label{font-size:14px;color:var(--text-secondary)}.setting-item input[type=text],.setting-item input[type=number]{background:var(--bg-input);border:1px solid var(--border);border-radius:8px;padding:10px 12px;color:var(--text);font-size:14px;outline:none}.setting-item input:focus{border-color:var(--primary)}.setting-item input[type=range]{width:100%}.modal-footer{display:flex;justify-content:flex-end;gap:12px;padding:16px 24px;border-top:1px solid var(--border)}.loading{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:14px}.loading:before{content:"";width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}