:root{--bg: #07080F;--surface: #111221;--sidebar-bg: #090A12;--border: #22243C;--text-primary: #F8FAFC;--text-secondary: #94A3B8;--text-muted: #475569;--accent: #8B5CF6;--accent-hover: #7C3AED;--light-purple: #201B4B;--success: #10B981;--warning: #FBBF24;--danger: #EF4444;--sidebar-width: 260px;--topbar-height: 64px;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px;line-height:1.5;color:var(--text-primary);background-color:var(--bg);-webkit-font-smoothing:antialiased}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;background:var(--bg);color:var(--text-primary);overflow-x:hidden}#root{min-height:100vh}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}h1,h2,h3,h4,h5,h6{font-family:Plus Jakarta Sans,sans-serif;color:var(--text-primary);letter-spacing:-.3px}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);min-height:100vh;background:var(--sidebar-bg);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;z-index:50;transition:transform .3s ease;overflow-y:auto}.sidebar-logo{padding:20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}.sidebar-logo img{height:32px;object-fit:contain}.sidebar-logo-text{font-family:Plus Jakarta Sans,sans-serif;font-weight:800;font-size:18px;background:linear-gradient(135deg,var(--accent),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.sidebar-user{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}.user-avatar{width:40px;height:40px;border-radius:50%;background:var(--light-purple);border:1.5px solid rgba(139,92,246,.3);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--accent);flex-shrink:0}.user-info h4{font-size:14px;font-weight:700;font-family:Plus Jakarta Sans,sans-serif;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:160px}.user-info p{font-size:12px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:160px}.sidebar-nav{flex:1;padding:12px 10px}.sidebar-section-label{font-size:10px;font-weight:700;letter-spacing:1.2px;color:var(--text-muted);text-transform:uppercase;padding:12px 12px 8px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;cursor:pointer;margin:2px 0;transition:all .18s ease;text-decoration:none;color:var(--text-primary);font-size:14px;font-weight:500;border:none;background:transparent;width:100%;text-align:left}.nav-item:hover{background:#8b5cf614;color:var(--accent)}.nav-item.active{background:var(--light-purple);color:var(--accent);font-weight:700}.nav-item .nav-icon{width:20px;height:20px;flex-shrink:0}.sidebar-footer{padding:12px 10px;border-top:1px solid var(--border)}.logout-btn{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;cursor:pointer;color:var(--danger);font-size:14px;font-weight:700;border:none;background:transparent;width:100%;text-align:left;transition:background .18s ease}.logout-btn:hover{background:#ef444414}.main-content{margin-left:var(--sidebar-width);flex:1;min-height:100vh;display:flex;flex-direction:column}.topbar{height:var(--topbar-height);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:40}.topbar-title{font-family:Plus Jakarta Sans,sans-serif;font-size:18px;font-weight:700;color:var(--text-primary);letter-spacing:-.3px}.topbar-actions{display:flex;align-items:center;gap:8px}.streak-badge{display:flex;align-items:center;gap:4px;padding:5px 10px;background:var(--surface);border:1px solid var(--border);border-radius:20px;font-size:13px;font-weight:700;color:var(--text-primary)}.page-content{flex:1;padding:24px;overflow-y:auto}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px}.card-sm{padding:16px;border-radius:12px}.card-lg{padding:24px;border-radius:20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all .2s ease;font-family:Inter,sans-serif;text-decoration:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--accent);border:1.5px solid var(--border)}.btn-outline:hover:not(:disabled){border-color:var(--accent);background:var(--light-purple)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover:not(:disabled){background:#ffffff0d;color:var(--text-primary)}.btn-sm{padding:8px 14px;font-size:13px;border-radius:10px}.btn-lg{padding:14px 28px;font-size:16px;border-radius:14px}.btn-full{width:100%}.input-group{display:flex;flex-direction:column;gap:6px}.input-label{font-size:13px;font-weight:600;color:var(--text-secondary)}.input{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 16px;font-size:14px;color:var(--text-primary);font-family:Inter,sans-serif;transition:border-color .2s ease;outline:none;width:100%}.input::placeholder{color:var(--text-muted)}.input:focus{border-color:var(--accent)}textarea.input{resize:vertical;min-height:80px}.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:99px;font-size:12px;font-weight:600}.badge-purple{background:var(--light-purple);color:var(--accent)}.badge-green{background:#10b9811f;color:var(--success)}.badge-red{background:#ef44441f;color:var(--danger)}.badge-yellow{background:#fbbf241f;color:var(--warning)}.badge-gray{background:#94a3b81a;color:var(--text-secondary)}.progress-bar-wrap{background:var(--bg);border-radius:99px;height:8px;overflow:hidden}.progress-bar-fill{height:100%;border-radius:99px;background:var(--accent);transition:width .5s ease}.progress-bar-fill.green{background:var(--success)}.progress-bar-fill.yellow{background:var(--warning)}.section-header{font-family:Plus Jakarta Sans,sans-serif;font-size:16px;font-weight:700;color:var(--text-primary);margin-bottom:12px}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-center{display:flex;align-items:center;justify-content:center;flex:1;min-height:300px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.tab-bar{display:flex;gap:4px;background:var(--bg);border-radius:12px;padding:4px;margin-bottom:20px}.tab-btn{flex:1;padding:10px 16px;border-radius:9px;border:none;background:transparent;color:var(--text-secondary);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease;font-family:Inter,sans-serif}.tab-btn.active{background:var(--surface);color:var(--accent);border:1px solid var(--border)}.divider{height:1px;background:var(--border);margin:20px 0}.chat-container{display:flex;flex-direction:column;height:calc(100vh - var(--topbar-height))}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.chat-bubble{max-width:70%;padding:14px 18px;border-radius:16px;font-size:15px;line-height:1.55;animation:fadeUp .25s ease}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.chat-bubble.user{align-self:flex-end;background:linear-gradient(135deg,#4f46e5 0%,var(--accent) 100%);color:#fff;border-bottom-right-radius:4px}.chat-bubble.bot{align-self:flex-start;background:var(--surface);border:1px solid var(--border);color:var(--text-primary);border-bottom-left-radius:4px}.chat-bubble.bot .bot-header{display:flex;align-items:center;gap:8px;margin-bottom:8px;font-size:12px;font-weight:700;color:var(--accent)}.chat-input-area{padding:16px 20px;background:var(--surface);border-top:1px solid var(--border);display:flex;gap:10px;align-items:flex-end}.chat-input{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:12px 16px;font-size:15px;color:var(--text-primary);font-family:Inter,sans-serif;resize:none;outline:none;min-height:48px;max-height:160px;transition:border-color .2s}.chat-input:focus{border-color:var(--accent)}.chat-send-btn{width:46px;height:46px;border-radius:12px;background:var(--accent);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0;transition:all .2s ease}.chat-send-btn:hover:not(:disabled){background:var(--accent-hover);transform:scale(1.05)}.chat-send-btn:disabled{opacity:.5;cursor:not-allowed}.typing-dots{display:inline-flex;gap:4px;align-items:center;padding:4px 0}.typing-dots span{width:6px;height:6px;background:var(--accent);border-radius:50%;animation:typingBounce 1.2s infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.login-page{min-height:100vh;background:var(--bg);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.login-glow{position:absolute;width:600px;height:600px;background:radial-gradient(circle,rgba(139,92,246,.12) 0%,transparent 70%);top:-100px;right:-100px;border-radius:50%;pointer-events:none}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:40px;width:100%;max-width:420px;position:relative;z-index:2}.login-logo{display:flex;align-items:center;gap:10px;margin-bottom:32px}.login-logo-icon{width:44px;height:44px;border-radius:12px;background:var(--light-purple);display:flex;align-items:center;justify-content:center;font-size:22px}.login-logo h1{font-size:22px;font-weight:800;background:linear-gradient(135deg,var(--accent),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.login-title{font-size:26px;font-weight:800;margin-bottom:6px}.login-sub{font-size:14px;color:var(--text-secondary);margin-bottom:28px}.error-msg{background:#ef44441a;border:1px solid rgba(239,68,68,.2);color:var(--danger);padding:10px 14px;border-radius:10px;font-size:13px;margin-top:12px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.gap-6{gap:24px}.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mb-2{margin-bottom:8px}.mb-3{margin-bottom:12px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.text-sm{font-size:13px}.text-muted{color:var(--text-secondary)}.font-bold{font-weight:700}.italic{font-style:italic}.w-full{width:100%}.hamburger-btn{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:4px}@media (max-width: 768px){.hamburger-btn{display:flex}.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.grid-2,.grid-3{grid-template-columns:1fr}.page-content{padding:16px}.chat-bubble{max-width:90%}}.overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;z-index:49}.overlay.visible{display:block}