:root{--bg-primary: #0d0d0d;--bg-secondary: #1a1a1a;--bg-tertiary: #2a2a2a;--bg-elevated: #212121;--bg-overlay: rgba(0,0,0,.7);--brand-gold: #d6a94e;--brand-orange: #ff6a1a;--brand-obsidian: #050505;--accent-teal: #00e5ff;--accent-purple: #8b5cf6;--accent-emerald: #10a37f;--text-primary: #ececec;--text-secondary: #b4b4b4;--text-tertiary: #8e8e8e;--text-muted: #5f5f5f;--text-inverse: #0d0d0d;--border-default: #2e2e2e;--border-subtle: #1f1f1f;--border-strong: #424242;--border-focus: var(--accent-teal);--color-success: #4caf50;--color-error: #ef4444;--color-warning: #f59e0b;--shadow-sm: 0 1px 2px rgba(0,0,0,.4);--shadow-md: 0 4px 12px rgba(0,0,0,.5);--shadow-lg: 0 12px 32px rgba(0,0,0,.6);--shadow-glow: 0 0 24px rgba(214,169,78,.15);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 22px;--radius-pill: 999px;--space-xs: 4px;--space-sm: 8px;--space-md: 12px;--space-lg: 16px;--space-xl: 24px;--space-2xl: 32px;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "SF Mono", Menlo, Monaco, monospace}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;width:100%}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}.app-shell{display:grid;grid-template-columns:280px 1fr;height:100vh;overflow:hidden;background:var(--bg-primary)}.app-shell.sidebar-collapsed{grid-template-columns:0 1fr}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border-subtle);display:flex;flex-direction:column;overflow:hidden;transition:width .2s ease}.sidebar-header{padding:12px;border-bottom:1px solid var(--border-subtle)}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:8px 12px;font-weight:600;font-size:16px;color:var(--text-primary)}.sidebar-brand-mark{width:32px;height:32px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--brand-gold),var(--brand-orange));display:flex;align-items:center;justify-content:center;color:var(--brand-obsidian);font-weight:700;box-shadow:var(--shadow-glow)}.new-chat-btn{width:100%;padding:10px 14px;background:transparent;color:var(--text-primary);border:1px solid var(--border-default);border-radius:var(--radius-md);font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .15s ease}.new-chat-btn:hover{background:var(--bg-tertiary);border-color:var(--border-strong)}.sidebar-list{flex:1;overflow-y:auto;padding:8px}.sidebar-section-title{font-size:11px;font-weight:600;text-transform:uppercase;color:var(--text-tertiary);padding:8px 12px;letter-spacing:.05em}.conv-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-md);cursor:pointer;font-size:14px;color:var(--text-secondary);transition:background .1s ease;margin-bottom:2px;position:relative}.conv-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.conv-item.active{background:var(--bg-elevated);color:var(--text-primary)}.conv-item-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-item-del{opacity:0;background:transparent;border:none;color:var(--text-tertiary);cursor:pointer;padding:2px 6px;border-radius:var(--radius-sm);font-size:12px}.conv-item:hover .conv-item-del{opacity:1}.conv-item-del:hover{background:var(--bg-tertiary);color:var(--color-error)}.sidebar-footer{border-top:1px solid var(--border-subtle);padding:12px;display:flex;flex-direction:column;gap:4px}.sidebar-footer-link{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-md);color:var(--text-secondary);text-decoration:none;font-size:14px;cursor:pointer;transition:background .1s ease}.sidebar-footer-link:hover{background:var(--bg-tertiary);color:var(--text-primary)}.user-chip{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius-md);cursor:pointer;border:1px solid var(--border-subtle);background:var(--bg-elevated)}.user-avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--accent-purple),var(--brand-gold));display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:600}.main{display:flex;flex-direction:column;height:100vh;overflow:hidden;background:var(--bg-primary)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border-subtle);background:var(--bg-primary);position:sticky;top:0;z-index:10}.topbar-left{display:flex;align-items:center;gap:12px}.icon-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;transition:all .1s ease}.icon-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.model-selector{position:relative}.model-button{background:transparent;border:none;color:var(--text-primary);padding:8px 12px;border-radius:var(--radius-md);font-size:15px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:8px;transition:background .1s ease}.model-button:hover{background:var(--bg-tertiary)}.model-button .model-icon{width:20px;height:20px;border-radius:5px;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}.model-dropdown{position:absolute;top:calc(100% + 6px);left:0;min-width:340px;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:6px;z-index:50;max-height:480px;overflow-y:auto}.model-dropdown-header{padding:10px 14px;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);font-weight:600}.model-option{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius-md);cursor:pointer;transition:background .1s ease}.model-option:hover{background:var(--bg-tertiary)}.model-option.active{background:#d6a94e14}.model-option-icon{width:32px;height:32px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0}.model-option-info{flex:1;min-width:0}.model-option-name{font-size:14px;font-weight:600;color:var(--text-primary)}.model-option-desc{font-size:12px;color:var(--text-tertiary);margin-top:2px}.model-option-badge{font-size:10px;padding:2px 6px;border-radius:var(--radius-sm);background:#d6a94e26;color:var(--brand-gold);font-weight:600}.chat-area{flex:1;overflow-y:auto;overflow-x:hidden;scroll-behavior:smooth}.chat-area-inner{max-width:768px;margin:0 auto;padding:32px 24px 120px}.welcome{text-align:center;padding:80px 0 40px}.welcome-title{font-size:32px;font-weight:700;background:linear-gradient(135deg,var(--brand-gold),var(--brand-orange));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}.welcome-sub{color:var(--text-tertiary);font-size:15px;margin-bottom:32px}.welcome-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:600px;margin:0 auto}.suggestion-card{padding:14px;background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);cursor:pointer;text-align:left;transition:all .15s ease}.suggestion-card:hover{background:var(--bg-tertiary);border-color:var(--border-strong);transform:translateY(-1px)}.suggestion-card-icon{font-size:18px;margin-bottom:8px}.suggestion-card-text{font-size:13px;color:var(--text-secondary);line-height:1.4}.msg{display:flex;gap:16px;padding:20px 0;animation:msgIn .3s ease}@keyframes msgIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.msg-avatar{width:32px;height:32px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}.msg.user .msg-avatar{background:var(--bg-tertiary);color:var(--text-primary)}.msg.assistant .msg-avatar{background:linear-gradient(135deg,var(--brand-gold),var(--brand-orange));color:var(--brand-obsidian)}.msg-body{flex:1;min-width:0}.msg-role{font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:4px}.msg-content{color:var(--text-primary);font-size:15px;line-height:1.65;white-space:pre-wrap;word-wrap:break-word}.msg-content code{background:var(--bg-secondary);padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:13px;color:var(--brand-gold)}.msg-content pre{background:var(--bg-secondary);padding:14px;border-radius:var(--radius-md);overflow-x:auto;margin:10px 0;border:1px solid var(--border-subtle)}.msg-content pre code{background:none;padding:0;color:var(--text-primary)}.msg-actions{display:flex;gap:6px;margin-top:8px;opacity:0;transition:opacity .15s ease}.msg:hover .msg-actions{opacity:1}.msg-action-btn{background:transparent;border:none;color:var(--text-tertiary);cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);font-size:12px;display:flex;align-items:center;gap:4px}.msg-action-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.streaming-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--brand-gold);margin-left:4px;animation:pulse 1s ease-in-out infinite}@keyframes pulse{0%,to{opacity:.4;transform:scale(.85)}50%{opacity:1;transform:scale(1)}}.tool-call-block{margin-top:12px;padding:12px;background:var(--bg-secondary);border:1px solid var(--border-default);border-radius:var(--radius-md);font-family:var(--font-mono);font-size:13px;color:var(--text-secondary)}.tool-call-label{color:var(--brand-gold);font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:6px}.composer-wrap{position:absolute;bottom:0;left:0;right:0;padding:16px 24px 24px;background:linear-gradient(180deg,transparent,var(--bg-primary) 30%)}.composer{max-width:768px;margin:0 auto;background:var(--bg-secondary);border:1px solid var(--border-default);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);transition:border-color .15s ease}.composer:focus-within{border-color:var(--accent-teal);box-shadow:0 0 0 3px #00e5ff1a}.composer-toolbar{display:flex;align-items:center;gap:6px;padding:8px 12px 4px;border-bottom:1px solid var(--border-subtle)}.composer-tool{background:transparent;border:1px solid var(--border-subtle);color:var(--text-secondary);cursor:pointer;padding:5px 10px;border-radius:var(--radius-sm);font-size:12px;display:flex;align-items:center;gap:4px;transition:all .1s ease}.composer-tool:hover{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--border-strong)}.composer-tool.active{background:#d6a94e26;color:var(--brand-gold);border-color:var(--brand-gold)}.composer-input{width:100%;background:transparent;border:none;color:var(--text-primary);font-family:var(--font-body);font-size:15px;line-height:1.5;padding:12px 16px;resize:none;outline:none;max-height:200px;min-height:24px}.composer-input::placeholder{color:var(--text-muted)}.composer-footer{display:flex;align-items:center;justify-content:space-between;padding:8px 12px}.composer-disclaimer{font-size:11px;color:var(--text-muted)}.send-btn{background:var(--brand-gold);color:var(--brand-obsidian);border:none;border-radius:var(--radius-md);padding:8px 14px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;transition:all .1s ease}.send-btn:hover:not(:disabled){background:var(--brand-orange);transform:translateY(-1px)}.send-btn:disabled{background:var(--bg-tertiary);color:var(--text-muted);cursor:not-allowed}.tools-panel{max-width:1100px;margin:0 auto;padding:24px}.tools-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.tools-title{font-size:22px;font-weight:700;color:var(--text-primary)}.tools-search{background:var(--bg-secondary);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:8px 12px;color:var(--text-primary);font-size:14px;width:280px;outline:none}.tools-search:focus{border-color:var(--accent-teal)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}.tool-card{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:16px;cursor:pointer;transition:all .15s ease}.tool-card:hover{border-color:var(--brand-gold);transform:translateY(-1px);box-shadow:var(--shadow-md)}.tool-card-icon{font-size:22px;margin-bottom:10px}.tool-card-name{font-weight:600;color:var(--text-primary);margin-bottom:4px;font-size:14px}.tool-card-desc{font-size:12px;color:var(--text-tertiary);line-height:1.4}.tool-card-cat{display:inline-block;margin-top:8px;font-size:10px;padding:2px 8px;border-radius:var(--radius-sm);background:var(--bg-tertiary);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}@media(max-width:768px){.app-shell{grid-template-columns:0 1fr}.app-shell.mobile-open{grid-template-columns:280px 1fr}.sidebar{position:absolute;z-index:100;height:100%}.welcome-title{font-size:24px}.welcome-grid{grid-template-columns:1fr}.model-dropdown{min-width:280px}}