*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0d1117;--surface: #161b22;--surface2: #21262d;--border: #30363d;--text: #e6edf3;--text-muted: #8b949e;--accent: #58a6ff;--green: #3fb950;--red: #f85149;--yellow: #d29922;--topbar-h: 52px;--toolbar-w: 160px}html,body{width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:13px}#app{position:relative;display:grid;grid-template-rows:var(--topbar-h) 1fr;grid-template-columns:var(--toolbar-w) 1fr;width:100vw;height:100vh}#topbar{grid-column:1 / -1;display:flex;align-items:center;gap:16px;padding:0 16px;background:var(--surface);border-bottom:1px solid var(--border);z-index:10}#level-info{display:flex;flex-direction:column;min-width:160px}#level-name{font-size:15px;font-weight:600;color:var(--text)}#level-desc{font-size:11px;color:var(--text-muted)}#top-actions{display:flex;gap:8px}#stats-bar{display:flex;gap:16px;margin-left:auto}.stat{display:flex;flex-direction:column;align-items:center}.stat label{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.stat span{font-size:14px;font-weight:600;font-variant-numeric:tabular-nums}.btn{padding:6px 14px;border-radius:6px;border:1px solid var(--border);cursor:pointer;font-size:13px;font-weight:500;transition:opacity .15s,background .15s}.btn:hover{opacity:.85}.btn-primary{background:#1f6feb;border-color:#388bfd;color:#fff}.btn-secondary{background:var(--surface2);color:var(--text)}.btn-danger{background:#da3633;border-color:#f85149;color:#fff}.btn-success{background:#238636;border-color:#3fb950;color:#fff}.btn-sm{padding:4px 10px;font-size:12px}#toolbar{background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;gap:0;overflow-y:auto;padding:8px 0}.tool-section{padding:8px 10px;border-bottom:1px solid var(--border)}.section-label{font-size:10px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.8px;margin-bottom:6px}.tool-btn{display:flex;align-items:center;gap:6px;width:100%;padding:7px 8px;border:1px solid transparent;border-radius:6px;cursor:pointer;background:transparent;color:var(--text-muted);font-size:12px;margin-bottom:3px;transition:background .15s,color .15s}.tool-btn svg{width:16px;height:16px;fill:currentColor;flex-shrink:0}.tool-btn:hover{background:var(--surface2);color:var(--text)}.tool-btn.active{background:#1f6feb22;border-color:#1f6feb55;color:var(--accent)}#lane-selector{display:flex;gap:4px}.lane-btn{flex:1;padding:5px 0;border-radius:5px;border:1px solid var(--border);background:var(--surface2);color:var(--text-muted);cursor:pointer;font-size:12px;transition:background .15s,color .15s}.lane-btn:hover{background:var(--surface);color:var(--text)}.lane-btn.active{background:#1f6feb33;border-color:var(--accent);color:var(--accent);font-weight:700}.type-btn{display:block;width:100%;padding:6px 8px;text-align:left;border-radius:5px;border:1px solid transparent;background:transparent;color:var(--text-muted);cursor:pointer;font-size:12px;margin-bottom:3px;transition:background .15s,color .15s}.type-btn:hover{background:var(--surface2);color:var(--text)}.type-btn.active{background:#1f6feb22;border-color:#1f6feb55;color:var(--accent)}.prop-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.prop-row label{color:var(--text-muted);font-size:12px}.prop-row input,.prop-row select{background:var(--surface2);border:1px solid var(--border);border-radius:4px;color:var(--text);font-size:12px;padding:3px 6px;width:80px}.help-text{font-size:11px;color:var(--text-muted);line-height:1.6}#level-buttons{display:flex;flex-direction:column;gap:3px}.level-sel-btn{padding:4px 8px;border-radius:4px;border:1px solid var(--border);background:var(--surface2);color:var(--text-muted);cursor:pointer;font-size:11px;text-align:left;transition:background .15s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.level-sel-btn:hover{background:var(--surface);color:var(--text)}.level-sel-btn.active{border-color:var(--accent);color:var(--accent);background:#1f6feb22}#canvas{display:block;width:100%;height:100%;cursor:crosshair;min-width:0;min-height:0}#results-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100}#results-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;min-width:400px;max-width:500px}#results-panel h2{font-size:22px;margin-bottom:20px;color:var(--text)}#results-stats{display:flex;gap:16px;justify-content:space-around;margin-bottom:20px}.result-item{text-align:center}.result-value{font-size:32px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--accent)}.result-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;margin-top:4px}#results-message{color:var(--text-muted);font-size:14px;margin-bottom:20px;line-height:1.6}.results-actions{display:flex;gap:10px;justify-content:flex-end}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}