:root{--sidebar-w: 260px;--notifications-w: 320px;--header-h: 52px;--bg: #ffffff;--bg-secondary: #f7f7f8;--bg-tertiary: #ececf1;--sidebar-bg: #171717;--sidebar-hover: #2a2a2a;--sidebar-active: #333333;--sidebar-text: #ececec;--sidebar-text-muted: #8e8e9e;--text: #1a1a1a;--text-secondary: #6b6b7b;--text-muted: #9b9bab;--border: #e5e5e5;--border-light: #f0f0f0;--primary: #001f36;--primary-light: #e6eef4;--primary-hover: #001528;--accent: #c62224;--accent-light: #fce8e8;--accent-hover: #a91c1e;--user-bg: #f7f7f8;--assistant-bg: #ffffff;--error-bg: #fef2f2;--error-text: #dc2626;--code-bg: #1e1e2e;--code-text: #cdd6f4;--radius: 12px;--radius-sm: 8px;--radius-xs: 6px;--shadow: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 30px rgba(0, 0, 0, .12);--transition: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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10px;color:var(--sidebar-text-muted);font-size:13px;text-align:center}.sidebar-group{margin-bottom:8px}.sidebar-group-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--sidebar-text-muted);padding:8px 10px 4px}.sidebar-item{display:flex;align-items:center;gap:8px;width:100%;padding:8px 10px;border:none;background:transparent;color:var(--sidebar-text);font-size:13.5px;border-radius:var(--radius-xs);cursor:pointer;text-align:left;transition:background var(--transition);position:relative;-webkit-user-select:none;user-select:none}.sidebar-item:focus{outline:none;background:var(--sidebar-hover)}.sidebar-item:hover{background:var(--sidebar-hover)}.sidebar-item.active{background:var(--sidebar-active)}.sidebar-item-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-item-delete{opacity:0;border:none;background:none;color:var(--sidebar-text-muted);cursor:pointer;padding:2px;border-radius:4px;display:flex;transition:opacity var(--transition)}.sidebar-item:hover .sidebar-item-delete{opacity:1}.sidebar-item-delete:hover{color:#ef4444}.sidebar-item-unread{min-width:18px;height:18px;padding:0 5px;background:var(--primary);color:#fff;font-size:10px;font-weight:600;border-radius:9px;display:flex;align-items:center;justify-content:center;line-height:1;flex-shrink:0}.sidebar-item.has-unread{background:#0a684726}.sidebar-item.has-unread:hover{background:#0a684740}.sidebar-footer{padding:12px 14px;border-top:1px solid rgba(255,255,255,.08)}.sidebar-footer-text{font-size:11px;color:var(--sidebar-text-muted)}.notifications-panel{width:var(--notifications-w);min-width:var(--notifications-w);height:100%;background:var(--sidebar-bg);display:flex;flex-direction:column;color:var(--sidebar-text);transition:transform var(--transition),margin var(--transition);transform:translate(100%);margin-right:calc(-1 * var(--notifications-w))}.notifications-panel.open{transform:translate(0);margin-right:0}.notifications-panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid rgba(255,255,255,.08)}.notifications-panel-header h3{font-size:15px;font-weight:600;color:var(--sidebar-text)}.notifications-close{color:var(--sidebar-text-muted)}.notifications-close:hover{color:var(--sidebar-text)}.notifications-panel-body{flex:1;overflow-y:auto;padding:14px}.notifications-panel-body::-webkit-scrollbar{width:6px}.notifications-panel-body::-webkit-scrollbar-track{background:transparent}.notifications-panel-body::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:3px}.notifications-panel-body::-webkit-scrollbar-thumb:hover{background:#ffffff40}.notifications-panel .news-flash-card{background:var(--bg);color:var(--text)}.notifications-panel .news-flash-headline{color:var(--text)}.notifications-panel .news-flash-brief{color:var(--text-secondary)}.notifications-panel .news-flash-source{color:var(--text-muted)}.notifications-panel .news-flash-empty,.notifications-panel .news-flash-empty-icon{color:var(--sidebar-text-muted)}.notifications-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:45}.chat-view{flex:1;display:flex;flex-direction:column;height:100%;min-width:0}.chat-header{height:var(--header-h);min-height:var(--header-h);display:flex;align-items:center;justify-content:space-between;padding:0 12px;border-bottom:1px solid 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h4{font-size:14px;font-weight:700;color:var(--text);margin:0}.plan-price{display:flex;align-items:baseline;gap:2px}.price-amount{font-size:16px;font-weight:700;color:var(--text)}.price-period{font-size:11px;color:var(--text-muted)}.plan-badge{display:inline-block;padding:2px 6px;border-radius:8px;font-size:9px;font-weight:600;text-transform:uppercase}.plan-badge.current{background:var(--primary);color:#fff}.plan-badge.recommended{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff}.plan-features{list-style:none;padding:0;margin:0 0 8px}.plan-features li{display:flex;gap:6px;padding:3px 0;border-bottom:1px solid var(--border-light);font-size:11px}.plan-features li:last-child{border-bottom:none}.plan-features li svg{flex-shrink:0;color:var(--primary);margin-top:1px}.plan-features li strong{display:block;color:var(--text);font-size:12px;margin-bottom:1px}.plan-features li p{margin:0;color:var(--text-secondary);font-size:10px;line-height:1.2}.plan-limits{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}.plan-limits span{padding:2px 6px;background:var(--bg-tertiary);border-radius:8px;font-size:9px;color:var(--text-secondary)}.btn-upgrade{width:100%;padding:10px 16px;margin-top:10px;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;border:none;border-radius:var(--radius-sm);font-size:13px;font-weight:700;cursor:pointer;transition:all var(--transition);box-shadow:0 4px 14px #f59e0b66;text-transform:uppercase;letter-spacing:.5px;animation:pulseGlow 2s ease-in-out infinite}@keyframes pulseGlow{0%,to{box-shadow:0 4px 14px #f59e0b66}50%{box-shadow:0 6px 20px #f59e0b99}}.btn-upgrade:hover{transform:translateY(-2px);box-shadow:0 6px 20px #f59e0b80;animation:none}.btn-upgrade:active{transform:translateY(0)}.tokens-section h4{font-size:14px;font-weight:600;color:var(--text);margin:0 0 4px}.tokens-desc{font-size:12px;color:var(--text-secondary);margin:0 0 10px}.token-packages{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.token-package{position:relative;padding:12px 10px;border:2px solid var(--border);border-radius:var(--radius);background:var(--bg);text-align:center;cursor:pointer;transition:all var(--transition)}.token-package:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-md)}.token-package.popular{border-color:var(--primary);background:var(--primary-light)}.token-badge{position:absolute;top:-8px;left:50%;transform:translate(-50%);padding:2px 8px;background:var(--primary);color:#fff;font-size:9px;font-weight:600;border-radius:8px;white-space:nowrap}.token-amount{font-size:24px;font-weight:700;color:var(--text);line-height:1}.token-label{font-size:10px;color:var(--text-muted);margin-bottom:4px}.token-price{font-size:13px;font-weight:600;color:var(--primary);margin-bottom:8px}.btn-buy{width:100%;padding:6px 12px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-size:11px;font-weight:500;cursor:pointer;transition:background var(--transition)}.btn-buy:hover{background:var(--primary-hover)}.tokens-info{font-size:10px;color:var(--text-muted);margin-top:8px;text-align:center}@media(max-width:640px){.plan-cards,.token-packages{grid-template-columns:1fr}}.settings-actions{display:flex;gap:10px;margin-top:20px}.btn-primary{padding:10px 20px;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;transition:background var(--transition)}.btn-primary:hover{background:var(--primary-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{padding:10px 20px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;transition:all var(--transition)}.btn-secondary:hover{background:var(--bg-secondary);border-color:var(--text-muted)}.btn-secondary:disabled{opacity:.6;cursor:not-allowed}.btn-danger{padding:10px 20px;background:#dc2626;color:#fff;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;transition:background var(--transition)}.btn-danger:hover{background:#b91c1c}@media(max-width:640px){.settings-modal{width:100%;max-width:100%;height:100%;max-height:100%;border-radius:0}.settings-modal-content{flex-direction:column}.settings-tabs{width:100%;min-width:100%;flex-direction:row;overflow-x:auto;padding:8px;border-right:none;border-bottom:1px solid var(--border-light)}.settings-tab{padding:8px 14px;white-space:nowrap}.settings-tab span{display:none}.settings-tab-content{padding:16px}.settings-row{flex-direction:column;gap:8px}.toggle-row{flex-direction:row}.settings-input{max-width:none}.settings-actions{flex-direction:column}}