*{margin:0;padding:0;box-sizing:border-box}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-100%;left:0;background:#1f6feb;color:#fff;padding:8px 16px;z-index:9999;border-radius:0 0 6px;text-decoration:none;font-size:14px}.skip-link:focus{top:0}:focus-visible{outline:2px solid #58a6ff;outline-offset:2px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:#151b26;color:#eae8db;height:100vh;overflow:hidden;display:flex}#canvas-container,#left-gutter,#hints,#keyboard-shortcuts,#rules-reference,#panel h3,#panel button{-webkit-user-select:none;user-select:none}input,textarea,[contenteditable=true]{-webkit-user-select:text;user-select:text}#canvas-container{flex:1;position:relative}svg{width:100%;height:100%;cursor:crosshair}#left-gutter{display:flex;flex-direction:column;gap:4px;overflow-y:auto;background:#2c2f38;border-right:1px solid 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path{fill:#8957e5}marker#arrowhead-selected path{fill:#58a6ff}#auth-modal-body{padding:12px 16px 16px}#auth-modal-body p{font-size:13px;color:#8b949e;margin:0 0 10px;line-height:1.4}#auth-upgrade-note{font-style:italic;color:#7ee787}#auth-email{display:block;width:100%;padding:8px 10px;font-size:13px;font-family:inherit;color:#eae8db;background:#151b26;border:1px solid #363940;border-radius:6px;box-sizing:border-box;margin-bottom:10px}#auth-email:focus{border-color:#388bfd}#auth-submit{display:block;width:100%;padding:8px 12px;font-size:13px;font-family:inherit;color:#fff;background:#1f6feb;border:none;border-radius:6px;cursor:pointer}#auth-submit:hover{background:#388bfd}#auth-submit:disabled{opacity:.6;cursor:default}#auth-status{font-size:12px;margin-top:8px;min-height:1.2em}.auth-status-success{color:#7ee787}.auth-status-error{color:#f85149}#upgrade-modal-body{padding:12px 16px 16px}.upgrade-tiers{display:flex;gap:12px}.upgrade-tier{flex:1;text-align:center;padding:16px 12px;border:1px solid #363940;border-radius:8px;background:#151b26}.upgrade-tier h4{font-size:13px;font-weight:600;color:#eae8db;margin:0 0 6px}.upgrade-tier-desc{font-size:12px;color:#8b949e;margin:0 0 12px;line-height:1.4;min-height:2.8em}.upgrade-price{font-size:24px;font-weight:700;color:#eae8db;margin:0 0 12px}.upgrade-period{font-size:13px;font-weight:400;color:#8b949e}#upgrade-buy-btn,#upgrade-desktop-btn{display:block;width:100%;padding:8px 12px;font-size:13px;font-family:inherit;color:#fff;background:#1f6feb;border:none;border-radius:6px;cursor:pointer;text-align:center;text-decoration:none;box-sizing:border-box}#upgrade-buy-btn:hover,#upgrade-desktop-btn:hover{background:#388bfd}#upgrade-buy-btn:disabled{opacity:.6;cursor:default}#upgrade-desktop-btn{background:#363940;border:1px solid #30363d}#upgrade-desktop-btn:hover{background:#30363d}#upgrade-status{font-size:12px;margin-top:10px;min-height:1.2em;color:#8b949e;text-align:center}#search-bar{position:absolute;top:12px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:6px;z-index:15;background:#2c2f38;border:1px solid #30363d;border-radius:6px;padding:6px 10px;box-shadow:0 4px 12px #0006}#search-mode-toggle{display:flex;gap:2px}.search-mode{padding:4px 8px;background:#363940;color:#8b949e;border:1px solid #30363d;border-radius:4px;font-size:11px;cursor:pointer;transition:background .15s,color .15s;white-space:nowrap}.search-mode:hover{background:#30363d;color:#eae8db}.search-mode.active{background:#1f6feb;border-color:#1f6feb;color:#fff}#search-input{width:260px;padding:5px 8px;font-size:13px;font-family:inherit;color:#eae8db;background:#151b26;border:1px solid #363940;border-radius:4px}#search-input:focus{border-color:#388bfd;outline:none}#search-count{font-size:11px;color:#8b949e;white-space:nowrap;min-width:40px}#search-close{background:none;border:none;color:#8b949e;font-size:16px;cursor:pointer;padding:2px 6px;line-height:1}#search-close:hover{color:#eae8db}#animation-bar{position:absolute;top:12px;left:12px;display:flex;align-items:center;gap:8px;z-index:10;background:#2c2f38;border:1px solid #30363d;border-radius:6px;padding:6px 10px}#animation-bar button{padding:4px 10px;background:#363940;color:#eae8db;border:1px solid #30363d;border-radius:6px;font-size:12px;cursor:pointer;transition:background .15s;flex-shrink:0}#animation-bar button:hover{background:#30363d}#animation-bar button.active{background:#1f6feb;border-color:#1f6feb;color:#fff}.anim-sliders{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.anim-slider-wrapper{display:flex;align-items:center;gap:6px}.anim-label{font-size:11px;color:#8b949e;font-family:SF Mono,Fira Code,Cascadia Code,monospace;white-space:nowrap}.anim-range{width:120px;height:4px;-webkit-appearance:none;appearance:none;background:#30363d;border-radius:2px;cursor:pointer}.anim-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:12px;height:12px;border-radius:50%;background:#797b7a;cursor:pointer;border:none}.anim-range::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:#797b7a;cursor:pointer;border:none}.anim-value{font-size:11px;color:#eae8db;font-family:SF Mono,Fira Code,Cascadia Code,monospace;min-width:60px;white-space:nowrap}#mobile-gate{display:none}@media(max-width:700px){#mobile-gate{display:flex;position:fixed;inset:0;z-index:1000;align-items:center;justify-content:center;padding:32px 24px;background:#151b26;color:#eae8db;text-align:center}.mobile-gate-inner{max-width:32rem}#mobile-gate h2{font-size:1.35rem;line-height:1.3;margin:0 0 1rem}#mobile-gate p{margin:0 0 .85rem;line-height:1.55;color:#b6b3a6}#mobile-gate .mobile-gate-link{margin-top:1.5rem}#mobile-gate a{color:#58a6ff;text-decoration:none;border:1px solid #58a6ff;border-radius:6px;padding:10px 18px;display:inline-block}#left-gutter,#canvas-container,#panel{display:none}}