*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f1117;--bg2:#161b27;--bg3:#1e2535;--border:#2a3347;--text:#c8d0e0;--text-dim:#6b7a99;--text-bright:#e8edf8;--accent:#6366f1;--accent-hover:#818cf8;--accent-bg:#6366f11f;--accent-border:#6366f166;--green:#22c55e;--red:#ef4444;--yellow:#f59e0b;--radius:10px;--radius-sm:6px;--shadow:0 4px 24px #0006;--font:"Inter", system-ui, -apple-system, sans-serif;--mono:"JetBrains Mono", "Fira Code", ui-monospace, monospace}html,body,#root{width:100%;height:100%;overflow:hidden}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}.btn{border-radius:var(--radius-sm);cursor:pointer;font-size:14px;font-weight:500;font-family:var(--font);white-space:nowrap;border:none;align-items:center;gap:8px;padding:10px 20px;text-decoration:none;transition:all .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-ghost{color:var(--text);border:1px solid var(--border);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--bg3);border-color:var(--text-dim)}.btn-danger{color:var(--red);background:0 0;border:1px solid #0000}.btn-danger:hover:not(:disabled){background:#ef44441a}.btn-icon{color:var(--text-dim);cursor:pointer;border-radius:var(--radius-sm);background:0 0;border:none;justify-content:center;align-items:center;padding:8px;transition:all 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var(--border);color:var(--text);border-bottom-left-radius:4px}.message-image{border-radius:var(--radius-sm);border:1px solid var(--border);max-width:300px;margin-bottom:8px}.message-time{color:var(--text-dim);margin-top:4px;padding:0 4px;font-size:11px}.message.user .message-time{text-align:right}.message-bubble h1,.message-bubble h2,.message-bubble h3{color:var(--text-bright);margin:12px 0 6px;font-weight:600}.message-bubble h1{font-size:18px}.message-bubble h2{font-size:16px}.message-bubble h3{font-size:14px}.message-bubble p{margin:6px 0}.message-bubble ul,.message-bubble ol{margin:6px 0;padding-left:20px}.message-bubble li{margin:3px 0}.message-bubble code{background:var(--bg3);font-family:var(--mono);color:var(--accent-hover);border-radius:4px;padding:2px 6px;font-size:13px}.message.user .message-bubble code{color:#fff;background:#ffffff26}.message-bubble pre{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius-sm);margin:8px 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var(--border);border-radius:var(--radius);align-items:flex-end;gap:10px;padding:10px 12px;transition:border-color .15s;display:flex}.chat-input-wrapper:focus-within{border-color:var(--accent)}.chat-input-image-preview{margin-bottom:8px;position:relative}.chat-input-image-preview img{border-radius:var(--radius-sm);border:1px solid var(--border);max-height:80px}.chat-input-image-remove{background:var(--red);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:20px;height:20px;font-size:12px;display:flex;position:absolute;top:-6px;right:-6px}.chat-textarea{color:var(--text-bright);font-size:14px;font-family:var(--font);resize:none;background:0 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16px;display:flex}.modal-title{color:var(--text-bright);flex:1;font-size:18px;font-weight:700}.modal-body{padding:24px}.tutorial-section{margin-bottom:24px}.tutorial-section:last-child{margin-bottom:0}.tutorial-section-title{color:var(--accent-hover);align-items:center;gap:8px;margin-bottom:10px;font-size:14px;font-weight:600;display:flex}.tutorial-item{color:var(--text);gap:10px;margin-bottom:8px;font-size:13px;line-height:1.5;display:flex}.tutorial-item-icon{flex-shrink:0;font-size:16px}.interactive-list-item{background:var(--bg3);border-radius:var(--radius-sm);color:var(--text);align-items:center;gap:10px;margin-bottom:6px;padding:8px 12px;font-size:13px;display:flex}.interactive-list-icon{font-size:18px}.mobile-header{border-bottom:1px solid var(--border);background:var(--bg2);z-index:60;flex-shrink:0;align-items:center;gap:12px;padding:12px 16px;display:none}@supports (padding-top:env(safe-area-inset-top)){.mobile-header{padding-top:calc(12px + env(safe-area-inset-top));padding-left:calc(16px + env(safe-area-inset-left));padding-right:calc(16px + env(safe-area-inset-right))}}.mobile-overlay{z-index:40;background:#0009;display:none;position:fixed;inset:0}@media (width<=768px){.sidebar{z-index:50;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.mobile-header{display:flex;position:sticky;top:0}.mobile-overlay.visible{display:block}.chat-messages{padding:16px 12px}.chat-input-area{padding:12px}.interactives-page{padding:16px}.interactives-grid{grid-template-columns:1fr}}.page-tabs{border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0;gap:4px;padding:8px 16px;display:flex}.page-tab{border-radius:var(--radius-sm);cursor:pointer;color:var(--text-dim);background:0 0;border:none;align-items:center;gap:6px;padding:6px 14px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.page-tab:hover{background:var(--bg3);color:var(--text)}.page-tab.active{background:var(--accent-bg);color:var(--accent-hover)}.spinner{border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:20px;height:20px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.page-title{color:var(--text-bright);margin-bottom:4px;font-size:22px;font-weight:700}.page-subtitle{color:var(--text-dim);font-size:14px}