:root{--bg:#161a1e;--grid:#24282d;--block-fill:#2b3036;--block-border:#5a646e;--text:#ebf0f5}.block rect{fill:var(--block-fill);stroke:var(--block-border);stroke-width:2;rx:14;ry:14;filter:drop-shadow(0 1px 0 rgba(0,0,0,.3));cursor:grab}.block.dragging rect{cursor:grabbing}.block-text{fill:var(--text);font-size:16px;font-weight:500}.block.note rect{opacity:.35}.wrap{max-width:1400px;margin:0 auto;padding:16px;display:grid;gap:16px}.canvas{background:#111519;border:1px solid #293039;border-radius:14px;overflow:hidden}.dash{stroke-dasharray:8 6}.neighbor{stroke:var(--block-border);stroke-width:1.5;opacity:.6}