:root{--bg: #0d1117;--panel: #161b22;--border: #30363d;--text: #e6edf3;--muted: #8b949e;--accent: #58a6ff;--accent-strong: #1f6feb;--danger: #f85149;--cell: #58a6ff;--grid: #21262d}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;overflow:hidden}.app{display:grid;grid-template-rows:auto 1fr;height:100vh}.main{display:grid;grid-template-columns:240px 1fr;min-height:0}.sidebar{background:var(--panel);border-right:1px solid var(--border);display:grid;grid-template-rows:1fr auto;min-height:0;overflow:hidden}.sidebar-scroll{overflow:hidden;padding:10px 10px 12px;display:flex;flex-direction:column;gap:4px;min-height:0}.section-header{display:flex;align-items:center;justify-content:space-between;padding:8px 6px 4px}.sidebar-title.inline{padding:0}.view-toggle{display:flex;gap:0;padding:2px;background:#0d1117;border:1px solid var(--border);border-radius:6px}.view-toggle button{display:flex;align-items:center;justify-content:center;width:22px;height:18px;padding:0;background:transparent;border:none;color:var(--muted);border-radius:4px;cursor:pointer;transition:background .1s,color .1s}.view-toggle button:hover{color:var(--text)}.view-toggle button.active{background:var(--accent-strong);color:#fff}.pattern-container{flex:1 1 auto;min-height:0}.pattern-category{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600;padding:10px 6px 4px;border-top:1px solid var(--border);margin-top:6px}.pattern-container.grid .pattern-category{grid-column:1 / -1}.pattern-container.list{display:flex;flex-direction:column;gap:4px;overflow-y:auto}.pattern-container.grid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:min-content;align-content:start;gap:4px;overflow-y:auto}.pattern-tile{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 2px;background:transparent;border:1px solid transparent;border-radius:6px;cursor:pointer;color:var(--text);text-align:center;transition:background .1s,border-color .1s;min-width:0}.pattern-tile:hover{background:#1c2128;border-color:var(--border)}.pattern-tile.active{background:#1f6feb26;border-color:var(--accent-strong)}.pattern-tile .preview{width:44px;height:44px;background:#0d1117;border:1px solid var(--border);border-radius:6px;color:var(--accent);padding:2px}.pattern-tile-name{font-size:10px;line-height:1.15;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.sidebar-pinned{padding:10px 10px 12px;border-top:1px solid var(--border);background:var(--panel);display:flex;flex-direction:column;gap:4px}.sidebar-title{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:8px 6px 4px;font-weight:600}.rule-select{width:100%;margin:0 0 4px}.rule-description{font-size:11px;color:var(--muted);line-height:1.35;padding:0 6px 4px}.brush-item{display:grid;grid-template-columns:44px 1fr;align-items:center;gap:10px;padding:6px 8px;background:transparent;border:1px solid transparent;border-radius:8px;text-align:left;cursor:pointer;color:var(--text);transition:background .1s,border-color .1s}.brush-item:hover{background:#1c2128;border-color:var(--border)}.brush-item.active{background:#1f6feb26;border-color:var(--accent-strong)}.brush-item .preview{width:44px;height:44px;background:#0d1117;border:1px solid var(--border);border-radius:6px;color:var(--accent);padding:2px;flex-shrink:0}.brush-item .cell-preview{display:flex;align-items:center;justify-content:center}.brush-item .cell-preview span{display:block;width:14px;height:14px;background:var(--accent);border-radius:2px}.brush-meta{min-width:0}.brush-name{font-size:13px;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.brush-desc{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.toolbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding:10px 14px;background:var(--panel);border-bottom:1px solid var(--border);z-index:2}.toolbar .group{display:flex;align-items:center;gap:6px;padding-right:12px;border-right:1px solid var(--border)}.toolbar .group:last-child{border-right:none}button{background:#21262d;color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 12px;cursor:pointer;font-size:13px;font-weight:500;transition:background .12s,border-color .12s}button:hover{background:#30363d;border-color:#484f58}button.primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}button.primary:hover{background:var(--accent);border-color:var(--accent)}button.danger{background:transparent;border-color:var(--danger);color:var(--danger)}button.danger:hover{background:var(--danger);color:#fff}select{background:#21262d;color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 10px;font-size:13px;cursor:pointer}label{font-size:13px;color:var(--muted)}input[type=range]{width:120px}.stats{margin-left:auto;display:flex;gap:16px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.stats span b{color:var(--text);font-weight:600}.canvas-wrap{position:relative;overflow:hidden;background:var(--bg)}canvas{display:block;cursor:crosshair}.hint{position:absolute;bottom:10px;left:14px;font-size:11px;color:var(--muted);background:#0d1117d9;padding:6px 10px;border-radius:6px;border:1px solid var(--border);pointer-events:none}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal{width:600px;max-width:92vw;max-height:85vh;background:var(--panel);border:1px solid var(--border);border-radius:10px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 20px 60px #00000080}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}.modal-title{font-size:14px;font-weight:600;color:var(--text)}.modal-close{background:transparent;border:none;color:var(--muted);font-size:24px;line-height:1;padding:0 6px;cursor:pointer}.modal-close:hover{color:var(--text);background:transparent;border-color:transparent}.modal-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:12px;overflow:auto}.modal-hint{margin:0;font-size:12px;color:var(--muted);line-height:1.5}.modal-hint a{color:var(--accent);text-decoration:none}.modal-hint a:hover{text-decoration:underline}.rle-input{width:100%;min-height:220px;font-family:ui-monospace,SFMono-Regular,SF Mono,Consolas,monospace;font-size:12px;line-height:1.5;padding:10px 12px;background:#0d1117;color:var(--text);border:1px solid var(--border);border-radius:6px;resize:vertical;outline:none}.rle-input:focus{border-color:var(--accent)}.modal-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.file-btn{display:inline-flex;align-items:center;background:#21262d;color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 12px;font-size:13px;font-weight:500;cursor:pointer;transition:background .12s,border-color .12s}.file-btn:hover{background:#30363d;border-color:#484f58}.file-btn input{display:none}.rle-error{font-size:12px;color:var(--danger)}.library-section{display:flex;flex-direction:column;gap:2px}.library-title{font-size:12px;font-weight:600;color:var(--text);padding:0 2px 4px}.library-group{display:flex;flex-direction:column}.library-category{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:8px 0 4px;font-weight:600}.library-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.library-item{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:8px 10px;background:#0d1117;border:1px solid var(--border);border-radius:6px;cursor:pointer;text-align:left;transition:background .1s,border-color .1s;min-width:0}.library-item:hover:not(:disabled){background:#1c2128;border-color:var(--accent-strong)}.library-item:disabled{opacity:.5;cursor:default}.library-item-name{font-size:13px;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.library-item-desc{font-size:11px;color:var(--muted);line-height:1.35;white-space:normal}.library-divider{font-size:10px;color:var(--muted);text-align:center;text-transform:uppercase;letter-spacing:.12em;margin:10px 0 -2px;padding-top:10px;border-top:1px solid var(--border)}.sidebar-legend{padding:6px 6px 4px;display:flex;flex-direction:column;gap:4px}.legend-bar{height:12px;border-radius:4px;border:1px solid var(--border)}.legend-ticks{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);font-variant-numeric:tabular-nums;text-transform:uppercase;letter-spacing:.06em}