:root{--bg-app: #0f1014;--bg-panel: #18191f;--bg-message-user: #2d6df6;--bg-message-ai: #232429;--text-primary: #f2f3f5;--text-secondary: #a1a3a8;--text-accent: #5e92ff;--border-subtle: #2a2b30;--glass-bg: rgba(24, 25, 31, .7);--glass-border: rgba(255, 255, 255, .05);--glass-blur: 12px;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--transition-fast: .2s ease}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-app);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;height:100vh;overflow:hidden}#root{height:100%}.glass{background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border)}.flex-center{display:flex;align-items:center;justify-content:center}.app-container{display:flex;height:100vh;width:100%;padding:var(--space-md);gap:var(--space-md)}.main-content{flex:1;display:flex;flex-direction:column;position:relative;height:100%;overflow:hidden;border-radius:var(--radius-lg);background:#0003}.sidebar{width:280px;height:100%;border-radius:var(--radius-lg);display:flex;flex-direction:column;padding:var(--space-md)}.sidebar-header{padding-bottom:var(--space-lg);border-bottom:1px solid var(--border-subtle);margin-bottom:var(--space-lg)}.logo{display:flex;align-items:center;gap:var(--space-sm);font-weight:600;font-size:1.1rem}.sidebar-content{flex:1;overflow-y:auto}.history-group .group-title{font-size:.8rem;color:var(--text-secondary);margin-bottom:var(--space-sm);text-transform:uppercase;letter-spacing:.5px}.history-item{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-secondary);transition:var(--transition-fast)}.history-item:hover,.history-item.active{background:#ffffff0d;color:var(--text-primary)}.sidebar-footer{padding-top:var(--space-md);border-top:1px solid var(--border-subtle)}.user-profile{display:flex;align-items:center;gap:var(--space-sm)}.user-avatar-sm{width:32px;height:32px;border-radius:50%;background:var(--text-accent)}.user-info{display:flex;flex-direction:column;font-size:.9rem}.user-info .status{font-size:.75rem;color:var(--text-secondary)}.chat-area{flex:1;overflow-y:auto;padding:var(--space-lg);padding-bottom:120px;display:flex;flex-direction:column;gap:var(--space-lg)}.welcome-screen{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--text-secondary);opacity:.6}.message-row{display:flex;gap:var(--space-md);max-width:800px;margin:0 auto;width:100%;animation:fadeIn .3s ease}.message-user-row{justify-content:flex-end}.avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.ai-avatar{background:var(--bg-panel);border:1px solid var(--border-subtle);color:var(--text-accent)}.message-bubble{padding:var(--space-md) var(--space-lg);border-radius:var(--radius-lg);line-height:1.6;position:relative;max-width:80%}.ai-bubble{background:var(--bg-message-ai);border-top-left-radius:4px}.user-bubble{background:var(--bg-message-user);border-top-right-radius:4px;color:#fff;-webkit-backdrop-filter:none;backdrop-filter:none}.input-container{position:absolute;bottom:var(--space-lg);left:50%;transform:translate(-50%);width:90%;max-width:800px;border-radius:var(--radius-lg);padding:var(--space-sm);background:#1e1e23cc}.input-form{display:flex;align-items:flex-end;gap:var(--space-sm);background:transparent}textarea{flex:1;background:transparent;border:none;color:var(--text-primary);padding:var(--space-sm) var(--space-md);font-family:inherit;font-size:1rem;resize:none;max-height:200px;outline:none}.send-button{background:var(--text-accent);color:#fff;border:none;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition-fast)}.send-button:disabled{background:var(--bg-panel);color:var(--text-secondary);cursor:not-allowed}.send-button:hover:not(:disabled){transform:scale(1.05)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.app-container{padding:0;gap:0}.sidebar{display:none}.main-content{border-radius:0}.input-container{width:95%;bottom:var(--space-md)}}.markdown-body{font-size:.95rem;line-height:1.6}.markdown-body p{margin-bottom:.8em}.markdown-body p:last-child{margin-bottom:0}.markdown-body ul,.markdown-body ol{margin-bottom:.8em;padding-left:1.5em}.markdown-body li{margin-bottom:.4em}.markdown-body pre{background:#0006;padding:1em;border-radius:var(--radius-sm);overflow-x:auto;margin-bottom:.8em;border:1px solid var(--border-subtle)}.markdown-body code{font-family:Menlo,Monaco,Courier New,monospace;font-size:.9em;background:#ffffff1a;padding:.2em .4em;border-radius:4px}.markdown-body pre code{background:transparent;padding:0;color:#e0e0e0}.markdown-body h1,.markdown-body h2,.markdown-body h3{margin-top:1em;margin-bottom:.5em;font-weight:600;line-height:1.3}.markdown-body h1{font-size:1.4em}.markdown-body h2{font-size:1.2em}.markdown-body h3{font-size:1.1em}.markdown-body a{color:var(--text-accent);text-decoration:none}.markdown-body a:hover{text-decoration:underline}.markdown-body blockquote{border-left:3px solid var(--text-accent);margin:0 0 1em;padding-left:1em;color:var(--text-secondary)}.user-bubble .markdown-body code{background:#fff3}