*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #0a0a14;--bg-secondary: #10101e;--bg-tertiary: #161628;--bg-card: rgba(22, 22, 40, .7);--bg-glass: rgba(22, 22, 40, .5);--bg-hover: rgba(139, 92, 246, .08);--text-primary: #e2e8f0;--text-secondary: rgba(226, 232, 240, .65);--text-muted: rgba(226, 232, 240, .4);--accent-primary: #8b5cf6;--accent-secondary: #6366f1;--accent-gradient: linear-gradient(135deg, #8b5cf6, #6366f1, #4f46e5);--accent-glow: rgba(139, 92, 246, .25);--border-color: rgba(139, 92, 246, .12);--border-hover: rgba(139, 92, 246, .3);--user-bubble: linear-gradient(135deg, #8b5cf6, #6366f1);--assistant-bubble: rgba(30, 30, 50, .8);--success: #10b981;--error: #ef4444;--warning: #f59e0b;--sidebar-width: 280px;--header-height: 64px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(139, 92, 246, .15);--font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif}html,body{height:100%;font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden}#root{height:100%}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#8b5cf633;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#8b5cf666}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse at 20% 20%,rgba(139,92,246,.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(99,102,241,.04) 0%,transparent 50%),radial-gradient(ellipse at 50% 50%,rgba(79,70,229,.03) 0%,transparent 60%);pointer-events:none;z-index:0}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;z-index:50;transition:transform .3s cubic-bezier(.4,0,.2,1)}.sidebar-header{padding:20px 16px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.sidebar-brand{display:flex;align-items:center;gap:10px}.sidebar-brand-icon{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-glow)}.sidebar-brand h2{font-size:16px;font-weight:700;color:var(--text-primary)}.new-chat-btn{display:flex;align-items:center;gap:8px;width:calc(100% - 32px);margin:16px auto;padding:10px 16px;background:var(--bg-glass);border:1px dashed var(--border-hover);border-radius:var(--radius-md);color:var(--accent-primary);font-size:13px;font-weight:500;font-family:var(--font-family);cursor:pointer;transition:all .2s ease}.new-chat-btn:hover{background:var(--bg-hover);border-color:var(--accent-primary);box-shadow:var(--shadow-glow)}.session-list{flex:1;overflow-y:auto;padding:8px}.session-item{display:flex;align-items:center;gap:10px;padding:10px 12px;margin-bottom:2px;border-radius:var(--radius-sm);cursor:pointer;transition:all .15s ease;border:1px solid transparent}.session-item:hover{background:var(--bg-hover)}.session-item.active{background:#8b5cf61f;border-color:var(--border-hover)}.session-item-text{flex:1;min-width:0}.session-item-title{font-size:13px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.session-item-date{font-size:11px;color:var(--text-muted);margin-top:2px}.session-delete-btn{opacity:0;padding:4px;background:none;border:none;color:var(--text-muted);cursor:pointer;border-radius:4px;transition:all .15s ease;display:flex;align-items:center}.session-item:hover .session-delete-btn{opacity:1}.session-delete-btn:hover{color:var(--error);background:#ef44441a}.chat-header{height:var(--header-height);padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-color);background:#0a0a14cc;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);position:sticky;top:0;z-index:10}.chat-header-left{display:flex;align-items:center;gap:12px}.chat-header-title{font-size:15px;font-weight:600;color:var(--text-primary);max-width:300px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-header-right{display:flex;align-items:center;gap:4px}.icon-btn{padding:8px;background:none;border:none;color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);transition:all .15s ease;display:flex;align-items:center;justify-content:center}.icon-btn:hover{background:var(--bg-hover);color:var(--accent-primary)}.icon-btn.danger:hover{background:#ef44441a;color:var(--error)}.message-area{flex:1;overflow-y:auto;padding:24px 20px;display:flex;flex-direction:column;gap:16px;scroll-behavior:smooth}.message-row{display:flex;gap:12px;width:100%;animation:messageSlideIn .3s ease-out}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.message-avatar{width:32px;height:32px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}.message-avatar.user-avatar{background:var(--user-bubble);box-shadow:0 2px 8px #8b5cf64d;order:2}.message-avatar.assistant-avatar{background:var(--bg-tertiary);border:1px solid var(--border-color)}.message-bubble{padding:12px 16px;border-radius:var(--radius-lg);max-width:75%;line-height:1.6;font-size:14px;position:relative}.message-bubble.user-bubble{background:var(--user-bubble);color:#fff;border-bottom-right-radius:4px;box-shadow:0 2px 12px #8b5cf633}.message-bubble.assistant-bubble{background:var(--assistant-bubble);border:1px solid var(--border-color);border-bottom-left-radius:4px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.message-timestamp{font-size:11px;color:var(--text-muted);margin-top:6px}.message-row.user .message-timestamp{text-align:right}.message-bubble.assistant-bubble p{margin-bottom:8px}.message-bubble.assistant-bubble p:last-child{margin-bottom:0}.message-bubble.assistant-bubble ul,.message-bubble.assistant-bubble ol{margin:8px 0;padding-left:20px}.message-bubble.assistant-bubble li{margin-bottom:4px}.message-bubble.assistant-bubble strong{color:#c4b5fd}.message-bubble.assistant-bubble code{background:#8b5cf626;padding:2px 6px;border-radius:4px;font-size:13px;color:#c4b5fd}.message-bubble.assistant-bubble pre{background:#0000004d;padding:12px;border-radius:var(--radius-sm);overflow-x:auto;margin:8px 0}.message-bubble.assistant-bubble pre code{background:none;padding:0}.copy-btn{position:absolute;top:8px;right:8px;padding:4px 8px;background:#8b5cf626;border:1px solid rgba(139,92,246,.2);border-radius:6px;color:var(--text-muted);font-size:11px;cursor:pointer;opacity:0;transition:all .15s ease;display:flex;align-items:center;gap:4px;font-family:var(--font-family)}.message-bubble:hover .copy-btn{opacity:1}.copy-btn:hover{background:#8b5cf640;color:var(--accent-primary)}.source-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;padding-top:10px;border-top:1px solid rgba(139,92,246,.1)}.source-chip{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;background:#8b5cf61a;border:1px solid rgba(139,92,246,.15);border-radius:100px;font-size:11px;color:var(--text-secondary)}.source-chip-score{color:var(--accent-primary);font-weight:600}.typing-indicator{display:flex;gap:4px;padding:8px 14px}.typing-dot{width:7px;height:7px;border-radius:50%;background:var(--accent-primary);animation:typingBounce 1.4s ease-in-out infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}.status-stages{display:flex;flex-direction:column;gap:6px;width:100%;animation:messageSlideIn .2s ease-out}.status-stage{display:flex;align-items:center;gap:8px;padding:8px 14px;background:#8b5cf60f;border-radius:var(--radius-sm);font-size:13px;color:var(--text-secondary);animation:statusPulse 2s ease-in-out infinite}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--accent-primary);animation:statusDotPulse 1.5s ease-in-out infinite}.input-area{padding:16px 20px 24px;border-top:1px solid var(--border-color);background:#0a0a1499;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.input-container{width:100%;display:flex;gap:10px;align-items:flex-end}.input-wrapper{flex:1;position:relative}.message-input{width:100%;padding:14px 18px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-lg);color:var(--text-primary);font-size:14px;font-family:var(--font-family);resize:none;outline:none;transition:all .2s ease;min-height:48px;max-height:150px}.message-input::placeholder{color:var(--text-muted)}.message-input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #8b5cf61a}.send-btn{width:48px;height:48px;border-radius:var(--radius-md);background:var(--accent-gradient);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;flex-shrink:0;box-shadow:0 2px 12px #8b5cf64d}.send-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 20px #8b5cf666}.send-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.input-hint{text-align:center;margin-top:8px;font-size:11px;color:var(--text-muted)}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 20px}.empty-icon{width:80px;height:80px;border-radius:var(--radius-xl);background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;margin-bottom:24px;box-shadow:0 8px 30px #8b5cf640;animation:floatIcon 3s ease-in-out infinite}.empty-title{font-size:26px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:10px}.empty-subtitle{color:var(--text-muted);text-align:center;max-width:480px;margin-bottom:32px;font-size:14px;line-height:1.6}.suggestion-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:560px;width:100%}.suggestion-chip{padding:14px 16px;background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);font-size:13px;font-family:var(--font-family);cursor:pointer;transition:all .2s ease;text-align:left;line-height:1.4;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.suggestion-chip:hover{background:var(--bg-hover);border-color:var(--border-hover);color:var(--text-primary);transform:translateY(-1px);box-shadow:var(--shadow-glow)}.suggestion-chip-icon{display:block;margin-bottom:6px;font-size:18px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .15s ease-out}.modal-content{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:28px;max-width:400px;width:90%;box-shadow:var(--shadow-lg);animation:modalSlideIn .2s ease-out}.modal-title{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}.modal-message{font-size:14px;color:var(--text-secondary);margin-bottom:24px;line-height:1.5}.modal-actions{display:flex;gap:10px;justify-content:flex-end}.modal-btn{padding:8px 20px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;font-family:var(--font-family);cursor:pointer;transition:all .15s ease;border:1px solid transparent}.modal-btn.cancel{background:var(--bg-glass);border-color:var(--border-color);color:var(--text-secondary)}.modal-btn.cancel:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-btn.confirm{background:var(--error);color:#fff;border-color:var(--error)}.modal-btn.confirm:hover{background:#dc2626;box-shadow:0 2px 12px #ef44444d}@keyframes messageSlideIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes typingBounce{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-6px);opacity:1}}@keyframes statusPulse{0%,to{opacity:.8}50%{opacity:1}}@keyframes statusDotPulse{0%,to{opacity:.4;transform:scale(.8)}50%{opacity:1;transform:scale(1.2)}}@keyframes floatIcon{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes modalSlideIn{0%{opacity:0;transform:scale(.95) translateY(-10px)}to{opacity:1;transform:scale(1) translateY(0)}}@media(max-width:768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-overlay{display:block!important;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:40}.suggestion-grid{grid-template-columns:1fr}.message-bubble{max-width:88%}.chat-header-title{max-width:180px}}