:root{--bg: #0f1115;--panel: #171a21;--panel-2: #1f232c;--border: #2a2f3a;--ink: #e7e9ee;--ink-2: #9aa2b1;--ink-3: #6b7280;--accent: #55c500;--accent-ink: #0a0f05;--anchor: #55c500;--control: #ff7a45;--handle-line: #6b7280;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";font-size:14px;line-height:1.5;min-height:100vh}#app{min-height:100vh;display:flex;flex-direction:column}header{padding:20px 24px 12px;border-bottom:1px solid var(--border)}header h1{margin:0 0 4px;font-size:20px;font-weight:700;letter-spacing:-.01em}header p{margin:0;color:var(--ink-2);font-size:13px}main{flex:1;display:grid;grid-template-columns:1fr 360px;gap:1px;background:var(--border);min-height:0}@media (max-width: 900px){main{grid-template-columns:1fr}}.canvas-pane,.side-pane{background:var(--bg);padding:20px;overflow:auto}.canvas-pane{display:flex;flex-direction:column;gap:12px}.toolbar{display:flex;flex-wrap:wrap;gap:6px}.toolbar button,.side-pane button{padding:6px 12px;background:var(--panel);border:1px solid var(--border);border-radius:6px;color:var(--ink);font:inherit;cursor:pointer}.toolbar button:hover,.side-pane button:hover{border-color:var(--ink-2)}.toolbar button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}.toolbar button.primary:hover{filter:brightness(1.05)}.toolbar .spacer{flex:1}.toolbar .group-label{color:var(--ink-3);font-size:12px;padding:6px 4px;align-self:center}.canvas-wrap{flex:1;min-height:400px;background:var(--panel);border:1px solid var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;overflow:hidden}.canvas-svg{display:block;background:linear-gradient(to right,rgba(255,255,255,.03) 1px,transparent 1px) 0 0 / 20px 20px,linear-gradient(to bottom,rgba(255,255,255,.03) 1px,transparent 1px) 0 0 / 20px 20px,var(--panel);width:100%;height:100%;max-height:600px;touch-action:none}.path-stroke{fill:none;stroke:var(--accent);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.path-fill{fill:#55c50014;stroke:none}.handle-line{stroke:var(--handle-line);stroke-width:1;stroke-dasharray:2 3;fill:none}.node-anchor,.node-control{cursor:grab}.node-anchor:active,.node-control:active{cursor:grabbing}.node-anchor{fill:var(--anchor);stroke:var(--bg);stroke-width:2}.node-control{fill:var(--control);stroke:var(--bg);stroke-width:2}.node-anchor.selected{stroke:var(--ink);stroke-width:3}.side-pane{display:flex;flex-direction:column;gap:16px}.side-pane h2{margin:0 0 6px;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-2)}.d-output{width:100%;min-height:120px;padding:10px 12px;background:var(--panel);border:1px solid var(--border);border-radius:6px;color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace;font-size:12px;line-height:1.6;resize:vertical}.d-output.error{border-color:#e06c75}.parse-error{color:#e06c75;font-size:12px;margin-top:4px}.node-list{display:flex;flex-direction:column;gap:4px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;max-height:240px;overflow:auto;padding:4px;background:var(--panel);border:1px solid var(--border);border-radius:6px}.node-list .row{display:flex;gap:6px;align-items:center;padding:2px 6px;border-radius:4px;cursor:pointer;color:var(--ink-2)}.node-list .row:hover{background:var(--panel-2)}.node-list .row.selected{background:var(--panel-2);color:var(--ink)}.node-list .kind{color:var(--accent);font-weight:600;min-width:16px}.node-list .row button{margin-left:auto;padding:2px 6px;font-size:11px;background:transparent;border:1px solid transparent;border-radius:3px;color:var(--ink-3);cursor:pointer}.node-list .row button:hover{border-color:var(--ink-3);color:var(--ink)}footer{padding:12px 24px;border-top:1px solid var(--border);font-size:12px;color:var(--ink-3);display:flex;gap:16px;align-items:center}footer a{color:var(--ink-2)}footer a:hover{color:var(--ink)}.legend{display:flex;gap:12px;align-items:center}.legend .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:4px;vertical-align:middle}.legend .dot.anchor{background:var(--anchor)}.legend .dot.control{background:var(--control)}