:root{--bg-primary: #0D1117;--bg-secondary: #161B22;--bg-card: #1C2128;--bg-hover: #21262D;--accent: #3B82F6;--accent-dim: rgba(59, 130, 246, .12);--accent-border: rgba(59, 130, 246, .35);--text-primary: #E6EDF3;--text-secondary: #8B949E;--text-muted: #484F58;--border: #30363D;--border-subtle: #21262D;--user-bubble: rgba(59, 130, 246, .15);--assistant-bubble: #1C2128;--danger: #F85149;--warning: #D29922;--success: #3FB950;--radius: 12px;--radius-sm: 8px;--sidebar-width: 240px}html{color-scheme:dark}html[data-theme=light]{--bg-primary: #F6F8FC;--bg-secondary: #FFFFFF;--bg-card: #FFFFFF;--bg-hover: #F1F5F9;--accent: #3B82F6;--accent-dim: rgba(59, 130, 246, .1);--accent-border: rgba(59, 130, 246, .24);--text-primary: #0F172A;--text-secondary: #475569;--text-muted: #94A3B8;--border: #D9E2ED;--border-subtle: #E7EDF5;--user-bubble: rgba(59, 130, 246, .09);--assistant-bubble: #FFFFFF}html[data-theme=light]{color-scheme:light}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.app-layout{display:flex;height:100vh;overflow:hidden}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:20px 16px 16px;border-bottom:1px solid var(--border)}.sidebar-logo{display:flex;align-items:center;gap:10px}.logo-icon{width:32px;height:32px;background:var(--accent-dim);border:1px solid var(--accent-border);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:16px;font-weight:700;flex-shrink:0}.logo-text{font-size:15px;font-weight:700;color:var(--text-primary);letter-spacing:-.3px}.logo-sub{font-size:11px;color:var(--text-secondary);margin-top:1px}.sidebar-nav{flex:1;padding:12px 8px;display:flex;flex-direction:column;gap:2px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);cursor:pointer;text-decoration:none;color:var(--text-secondary);font-size:14px;font-weight:500;transition:background .15s,color .15s;border:none;background:none;width:100%;text-align:left}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{background:var(--accent-dim);color:var(--accent);border:1px solid var(--accent-border)}.nav-icon{font-size:16px;width:20px;text-align:center;flex-shrink:0}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border)}.user-chip{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border)}.user-avatar{width:26px;height:26px;background:var(--accent-dim);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--accent);font-weight:700}.user-name{font-size:12px;color:var(--text-secondary);flex:1}.user-badge{font-size:10px;background:var(--accent-dim);color:var(--accent);padding:2px 6px;border-radius:10px;border:1px solid var(--accent-border)}.page-header{padding:20px 28px 16px;border-bottom:1px solid var(--border);background:var(--bg-secondary);flex-shrink:0}.page-title{font-size:18px;font-weight:700;color:var(--text-primary);letter-spacing:-.3px}.page-subtitle{font-size:13px;color:var(--text-secondary);margin-top:2px}.settings-page{display:flex;flex-direction:column;height:100%}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.theme-card{display:flex;align-items:center;gap:12px;width:100%;text-align:left;border-radius:12px;padding:14px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-primary);cursor:pointer;font-family:inherit;transition:border-color .15s,transform .15s,background .15s}.theme-card:hover{background:var(--bg-hover);border-color:var(--accent-border)}.theme-card.active{background:var(--accent-dim);border-color:var(--accent-border)}.theme-preview{width:54px;height:54px;border-radius:12px;border:1px solid var(--border);flex-shrink:0;overflow:hidden;position:relative}.theme-preview.dark{background:linear-gradient(145deg,#111827,#1f2937)}.theme-preview.light{background:linear-gradient(145deg,#fff,#e2e8f0)}.theme-preview:before{content:"";position:absolute;inset:10px 11px auto 11px;height:8px;border-radius:999px;background:var(--accent)}.theme-preview:after{content:"";position:absolute;left:11px;right:11px;top:25px;height:18px;border-radius:8px;background:#1abc9c1f;border:1px solid rgba(26,188,156,.24)}.theme-title{font-size:14px;font-weight:700;margin-bottom:3px}.theme-desc{font-size:12px;color:var(--text-secondary);line-height:1.5}.theme-check{margin-left:auto;width:22px;height:22px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#0d1117;font-weight:800;font-size:12px;flex-shrink:0}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;border:none;transition:opacity .15s,transform .1s;font-family:inherit}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#0d1117}.btn-primary:hover:not(:disabled){opacity:.88}.btn-ghost{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg-hover)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.card-title{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:4px}.card-meta{font-size:12px;color:var(--text-secondary)}.tag{display:inline-flex;align-items:center;padding:3px 10px;border-radius:100px;font-size:12px;font-weight:500;background:var(--bg-hover);color:var(--text-secondary);border:1px solid var(--border)}.tag-accent{background:var(--accent-dim);color:var(--accent);border-color:var(--accent-border)}.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}@keyframes spin{to{transform:rotate(360deg)}}@keyframes jelly-float{0%,to{transform:translateY(0) scale(1)}50%{transform:translateY(0) scale(1)}}.jelly-avatar{animation:jelly-float 3.2s ease-in-out infinite,jelly-glow 2.6s ease-in-out infinite;display:inline-flex;align-items:center;justify-content:center;line-height:1}.typing-dots{display:flex;gap:4px;padding:6px 0}.typing-dots span{width:6px;height:6px;background:var(--text-muted);border-radius:50%;animation:bounce 1.2s ease-in-out infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:translateY(0);opacity:.4}40%{transform:translateY(-5px);opacity:1}}.divider{height:1px;background:var(--border);margin:16px 0}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:60px 20px;text-align:center}.empty-icon{font-size:36px;opacity:.4}.empty-title{font-size:15px;font-weight:600;color:var(--text-primary)}.empty-desc{font-size:13px;color:var(--text-secondary);max-width:280px}@media (max-width: 720px){.settings-grid{grid-template-columns:1fr}.settings-page .page-header{flex-wrap:wrap;align-items:flex-start}}