:root{--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-primary-light:#eff6ff;--color-primary-border:#bfdbfe;--color-bg:#f8fafc;--color-surface:#fff;--color-border:#e2e8f0;--color-border-light:#f1f5f9;--color-text:#0f172a;--color-text-secondary:#475569;--color-text-muted:#94a3b8;--color-success:#059669;--color-success-bg:#ecfdf5;--color-success-border:#a7f3d0;--color-error:#dc2626;--color-error-bg:#fef2f2;--color-error-border:#fecaca;--color-warning:#d97706;--color-warning-bg:#fffbeb;--color-warning-border:#fde68a;--color-info:#0284c7;--color-info-bg:#f0f9ff;--color-info-border:#bae6fd;--color-purple:#7c3aed;--color-purple-bg:#f5f3ff;--color-purple-border:#ddd6fe;--space-xs:4px;--space-sm:8px;--space-md:12px;--space-lg:16px;--space-xl:24px;--space-2xl:32px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px 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var(--space-md);border-radius:var(--radius-md);cursor:pointer;text-align:left;margin-bottom:var(--space-xs);background:0 0;border:none;transition:all .15s;display:flex;position:relative}.nav-item:hover:not(:disabled){background:var(--color-primary-light)}.nav-item.active{background:var(--color-primary-light);border:1px solid var(--color-primary-border)}.nav-item:disabled{opacity:.5;cursor:not-allowed}.nav-icon{flex-shrink:0;margin-top:1px;font-size:20px;line-height:1}.nav-content{flex-direction:column;min-width:0;display:flex}.nav-label{color:var(--color-text);font-size:14px;font-weight:600;line-height:1.3}.nav-desc{color:var(--color-text-muted);margin-top:2px;font-size:11px;line-height:1.4}.nav-active-dot{background:var(--color-primary);border-radius:50%;width:6px;height:6px;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.sidebar-footer{padding:var(--space-lg);border-top:1px solid var(--color-border-light)}.env-badge{align-items:center;gap:var(--space-sm);color:var(--color-success);font-size:12px;font-weight:500;display:flex}.env-dot{background:var(--color-success);border-radius:50%;width:6px;height:6px;animation:2s infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.env-info{color:var(--color-text-muted);margin-top:var(--space-xs);font-size:11px;font-family:var(--font-mono)}@media (width<=1024px){.sidebar{display:none}}.info-panel{width:var(--info-panel-width);gap:var(--space-md);height:100vh;padding:var(--space-lg);background:var(--color-bg);border-left:1px solid var(--color-border);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;right:0;overflow-y:auto}.info-card{background:var(--color-surface);border:1px solid 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p{margin:0}.markdown-body code{font-family:var(--font-mono);background:var(--color-bg);border:1px solid var(--color-border);color:var(--color-error);border-radius:4px;padding:2px 6px;font-size:13px}.markdown-body pre{border-radius:var(--radius-md);background:#1e293b;margin:12px 0;padding:16px;overflow-x:auto}.markdown-body pre code{color:#e2e8f0;background:0 0;border:none;padding:0;font-size:13px;line-height:1.5}.markdown-body a{color:var(--color-primary);text-decoration:none}.markdown-body a:hover{text-decoration:underline}.markdown-body table{border-collapse:collapse;width:100%;margin:12px 0;display:block;overflow-x:auto}.markdown-body thead{background:var(--color-bg)}.markdown-body th,.markdown-body td{border:1px solid var(--color-border);text-align:left;padding:8px 12px;font-size:13px}.markdown-body th{color:var(--color-text);font-weight:600}.markdown-body tr:nth-child(2n){background:var(--color-bg)}.markdown-body hr{border:none;border-top:1px solid var(--color-border);margin:16px 0}.markdown-body img{border-radius:var(--radius-sm);max-width:100%}.chat-input-area{padding:var(--space-lg) var(--space-xl);background:var(--color-surface);border-top:1px solid var(--color-border)}.chat-input-wrapper{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);transition:border-color .15s,box-shadow .15s;overflow:hidden}.chat-input-wrapper:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.chat-textarea{width:100%;padding:var(--space-md) var(--space-lg);font-size:14px;font-family:var(--font-sans);color:var(--color-text);resize:none;background:0 0;border:none;outline:none;min-height:44px;max-height:120px;line-height:1.5}.chat-textarea::placeholder{color:var(--color-text-muted)}.chat-textarea:disabled{background:var(--color-bg);cursor:not-allowed}.chat-input-footer{padding:var(--space-sm) var(--space-md);justify-content:space-between;align-items:center;display:flex}.char-count{color:var(--color-text-muted);font-size:11px}.char-count.over{color:var(--color-error);font-weight:600}.send-btn{align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-lg);background:var(--color-primary);color:#fff;border-radius:var(--radius-md);cursor:pointer;border:none;font-size:13px;font-weight:600;transition:all .15s;display:flex}.send-btn:hover:not(:disabled){background:var(--color-primary-hover);box-shadow:var(--shadow-md)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.send-icon{font-size:14px;font-weight:700}.send-loading{align-items:center;gap:var(--space-xs);display:flex}.send-loading:after{content:"";border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:12px;height:12px;animation:.6s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.admin-panel{background:var(--color-surface);border:1px solid 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0;color:var(--color-text-muted);font-size:11px}.app-layout{background:var(--color-bg);min-height:100vh;display:flex}.main-area{margin-left:var(--sidebar-width);margin-right:var(--info-panel-width);background:var(--color-bg);flex-direction:column;flex:1;height:100vh;display:flex}.main-header{padding:var(--space-lg) var(--space-xl);background:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:50;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.header-left{align-items:center;gap:var(--space-md);display:flex}.header-title{color:var(--color-text);letter-spacing:-.01em;margin:0;font-size:16px;font-weight:700}.header-badge{color:var(--color-primary);background:var(--color-primary-light);border:1px solid var(--color-primary-border);border-radius:10px;padding:2px 10px;font-size:11px;font-weight:500}.mobile-mode-switch{display:none}.mode-select{padding:var(--space-sm) var(--space-md);border:1px solid 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var(--space-xl);gap:var(--space-md);flex-direction:column;display:flex}.error-banner{align-items:center;gap:var(--space-sm);padding:var(--space-md) var(--space-lg);background:var(--color-error-bg);border:1px solid var(--color-error-border);border-radius:var(--radius-md);margin:var(--space-md) 0;display:flex}.error-icon{flex-shrink:0;font-size:16px}.error-banner span:last-child{color:var(--color-error);font-size:13px}@media (width<=1024px){.main-area{margin-right:0}.mobile-mode-switch{display:block}}@media (width<=768px){.main-area{margin-left:0}.main-header{padding:var(--space-md) var(--space-lg)}.messages-list{padding:var(--space-lg)}.input-section{padding:0 var(--space-lg) var(--space-lg)}}