:root{--bg-primary:#fff;--bg-secondary:#f8fafc;--text-primary:#0f172a;--text-secondary:#475569;--border-color:#e2e8f0;--accent-primary:#6366f1;--accent-hover:#4f46e5;--accent-bg:#6366f11a;--error-bg:#fef2f2;--error-text:#b91c1c;--error-border:#fecaca;--scrollbar-thumb:#cbd5e1;--scrollbar-track:#f1f5f9;--editor-bg:#f8fafc;--editor-text:#0f172a;--editor-gutter:#e2e8f0;--editor-gutter-text:#94a3b8;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--glass-bg:#ffffffb3;--glass-border:#e2e8f0cc;--glass-blur:12px;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;--mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;font-family:var(--sans);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg-primary:#0b0f19;--bg-secondary:#111827;--text-primary:#f8fafc;--text-secondary:#94a3b8;--border-color:#1e293b;--accent-primary:#818cf8;--accent-hover:#6366f1;--accent-bg:#818cf826;--error-bg:#450a0a;--error-text:#fca5a5;--error-border:#7f1d1d;--scrollbar-thumb:#334155;--scrollbar-track:#0b0f19;--editor-bg:#090d16;--editor-text:#e2e8f0;--editor-gutter:#111827;--editor-gutter-text:#475569;--shadow-sm:0 1px 2px 0 #00000080;--shadow-md:0 4px 6px -1px #0000004d, 0 2px 4px -2px #0000004d;--shadow-lg:0 10px 15px -3px #0006, 0 4px 6px -4px #0006;--glass-bg:#0b0f19b3;--glass-border:#1e293bcc;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=light]{--bg-primary:#fff;--bg-secondary:#f8fafc;--text-primary:#0f172a;--text-secondary:#475569;--border-color:#e2e8f0;--accent-primary:#6366f1;--accent-hover:#4f46e5;--accent-bg:#6366f11a;--error-bg:#fef2f2;--error-text:#b91c1c;--error-border:#fecaca;--scrollbar-thumb:#cbd5e1;--scrollbar-track:#f1f5f9;--editor-bg:#f8fafc;--editor-text:#0f172a;--editor-gutter:#e2e8f0;--editor-gutter-text:#94a3b8;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--glass-bg:#ffffffb3;--glass-border:#e2e8f0cc;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--bg-primary:#0b0f19;--bg-secondary:#111827;--text-primary:#f8fafc;--text-secondary:#94a3b8;--border-color:#1e293b;--accent-primary:#818cf8;--accent-hover:#6366f1;--accent-bg:#818cf826;--error-bg:#450a0a;--error-text:#fca5a5;--error-border:#7f1d1d;--scrollbar-thumb:#334155;--scrollbar-track:#0b0f19;--editor-bg:#090d16;--editor-text:#e2e8f0;--editor-gutter:#111827;--editor-gutter-text:#475569;--shadow-sm:0 1px 2px 0 #00000080;--shadow-md:0 4px 6px -1px #0000004d, 0 2px 4px -2px #0000004d;--shadow-lg:0 10px 15px -3px #0006, 0 4px 6px -4px #0006;--glass-bg:#0b0f19b3;--glass-border:#1e293bcc;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track);scrollbar-width:thin;margin:0;padding:0}@supports not (scrollbar-color:auto){::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100svh;overflow:hidden}#root{flex-direction:column;width:100vw;height:100svh;display:flex;overflow:hidden}a{color:var(--accent-primary);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-hover)}button{font-family:var(--sans);cursor:pointer;color:inherit;background:0 0;border:none;outline:none}.app-container{background-color:var(--bg-primary);width:100%;height:100%;color:var(--text-primary);flex-direction:column;display:flex;overflow:hidden}.toolbar{border-bottom:1px solid var(--border-color);background-color:var(--glass-bg);height:60px;min-height:60px;-webkit-backdrop-filter:blur(var(--glass-blur));z-index:10;justify-content:space-between;align-items:center;padding:0 20px;display:flex}.brand{align-items:center;gap:10px;display:flex}.brand-icon{color:var(--accent-primary);align-items:center;display:flex}.brand-title{letter-spacing:-.5px;color:var(--text-primary);font-size:18px;font-weight:600}.brand-subtitle{color:var(--text-secondary);background:var(--accent-bg);border-radius:var(--radius-sm);padding:2px 6px;font-size:12px;font-weight:500}.toolbar-controls{align-items:center;gap:12px;display:flex}.toolbar-group{border-right:1px solid var(--border-color);align-items:center;gap:6px;padding-right:12px;display:flex}.toolbar-group:last-child{border-right:none;padding-right:0}.btn{border-radius:var(--radius-md);white-space:nowrap;justify-content:center;align-items:center;gap:6px;height:36px;padding:0 12px;font-size:14px;font-weight:500;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex}.btn-icon-only{width:36px;padding:0}.btn-secondary{border:1px solid var(--border-color);color:var(--text-primary);background-color:var(--bg-primary)}.btn-secondary:hover{background-color:var(--bg-secondary);border-color:var(--accent-primary)}.btn-primary{background-color:var(--accent-primary);color:#fff}.btn-primary:hover{background-color:var(--accent-hover);box-shadow:0 0 10px #6366f14d}.btn-danger{background-color:var(--error-bg);color:var(--error-text);border:1px solid var(--error-border)}.btn-danger:hover{background-color:var(--error-text);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}.select-wrapper{align-items:center;display:flex;position:relative}.select-control{border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--bg-primary);height:36px;color:var(--text-primary);cursor:pointer;appearance:none;outline:none;min-width:160px;padding:0 32px 0 12px;font-size:14px;font-weight:500;transition:all .2s}.select-control:hover{border-color:var(--accent-primary);background-color:var(--bg-secondary)}.select-icon{pointer-events:none;color:var(--text-secondary);align-items:center;display:flex;position:absolute;right:12px}.workspace{flex-grow:1;grid-template-columns:1fr 1fr;height:calc(100svh - 60px);display:grid;overflow:hidden}@media (width<=768px){.workspace{grid-template-rows:1fr 1fr;grid-template-columns:1fr}}.editor-pane{border-right:1px solid var(--border-color);background-color:var(--editor-bg);flex-direction:column;height:100%;display:flex;overflow:hidden}.pane-header{background-color:var(--bg-secondary);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;height:40px;min-height:40px;padding:0 16px;display:flex}.pane-title{text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);align-items:center;gap:6px;font-size:12px;font-weight:600;display:flex}.editor-body{flex-grow:1;display:flex;position:relative;overflow:hidden}.editor-line-numbers{background-color:var(--editor-gutter);border-right:1px solid var(--border-color);width:48px;min-width:48px;color:var(--editor-gutter-text);font-family:var(--mono);text-align:right;-webkit-user-select:none;user-select:none;padding:16px 12px 16px 0;font-size:14px;line-height:20px;overflow:hidden}.editor-textarea{resize:none;background-color:var(--editor-bg);height:100%;color:var(--editor-text);font-family:var(--mono);tab-size:4;white-space:pre;border:none;outline:none;flex-grow:1;padding:16px;font-size:14px;line-height:20px;overflow:auto}.visualizer-pane{background-color:var(--bg-secondary);flex-direction:column;height:100%;display:flex;position:relative;overflow:hidden}.visualizer-body{flex-grow:1;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.mermaid-diagram-container{cursor:grab;justify-content:center;align-items:center;width:100%;height:100%;display:flex}.mermaid-diagram-container:active{cursor:grabbing}.mermaid-diagram-container svg{max-width:100%;height:auto;max-height:100%;display:block}.visualizer-controls{background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);z-index:5;gap:8px;padding:6px;display:flex;position:absolute;bottom:20px;right:20px}.error-overlay{-webkit-backdrop-filter:blur(4px);z-index:8;background-color:#0b0f1966;justify-content:center;align-items:center;padding:30px;animation:.2s ease-out fadeIn;display:flex;position:absolute;inset:0}.error-card{background-color:var(--bg-primary);border:1px solid var(--error-border);border-radius:var(--radius-lg);width:100%;max-width:500px;box-shadow:var(--shadow-lg);animation:.3s cubic-bezier(.16,1,.3,1) slideUp;overflow:hidden}.error-card-header{background-color:var(--error-bg);color:var(--error-text);border-bottom:1px solid var(--error-border);align-items:center;gap:8px;padding:12px 16px;font-size:14px;font-weight:600;display:flex}.error-card-body{padding:16px}.error-card-message{font-family:var(--mono);color:var(--text-primary);background-color:var(--bg-secondary);border-radius:var(--radius-md);border:1px solid var(--border-color);max-height:200px;padding:12px;font-size:12px;line-height:18px;overflow-x:auto}.error-card-footer{border-top:1px solid var(--border-color);justify-content:flex-end;padding:12px 16px;display:flex}.empty-state{color:var(--text-secondary);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:40px;display:flex}.empty-state-icon{color:var(--border-color)}.empty-state-title{color:var(--text-primary);font-size:16px;font-weight:600}.empty-state-desc{max-width:250px;font-size:14px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}