:root{color-scheme:light;font-family:IBM Plex Sans,Segoe UI,sans-serif;line-height:1.4;color:#1f241f;background-color:#f3f0e9}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 15% 10%,#fff8ef,#f3f0e9 55%)}#root{min-height:100vh}.app-shell{min-height:100vh;display:grid;grid-template-rows:auto 1fr auto}.toolbar{display:flex;justify-content:space-between;align-items:center;padding:.8rem 1rem;border-bottom:1px solid #b6ad9c;background-color:#eee8dc}.toolbar-left,.toolbar-right{display:flex;gap:.6rem;align-items:center}.toolbar button{border:1px solid #4b463c;background:#faf6ee;color:#2b2a25;padding:.5rem .8rem;border-radius:6px;cursor:pointer;font-weight:600}.toolbar button.active{background-color:#334e3c;color:#fff}.toolbar button:disabled{opacity:.55;cursor:not-allowed}.canvas-wrap{min-height:420px;padding:.75rem}.linkage-canvas{width:100%;height:calc(100vh - 170px);min-height:420px;border:1px solid #8f887a;background:#f8f8f6;touch-action:none}.statusbar{display:flex;gap:1rem;align-items:center;padding:.6rem 1rem;border-top:1px solid #b6ad9c;background-color:#eee8dc;font-size:.95rem}.scene-debug{display:none}.pen-context-menu{position:fixed;z-index:20;min-width:190px;display:flex;flex-direction:column;gap:.45rem;padding:.55rem .6rem;border:1px solid #4b463c;border-radius:8px;background:#fffaf2;box-shadow:0 8px 20px #2b2a2538}.pen-context-row{display:flex;align-items:center;justify-content:space-between;gap:.7rem;font-size:.92rem;color:#2b2a25}.pen-context-menu input[type=color]{width:40px;height:28px;border:1px solid #5b5549;border-radius:4px;padding:0;cursor:pointer;background:#faf6ee}.pen-context-menu button{border:1px solid #4b463c;background:#faf6ee;color:#2b2a25;padding:.4rem .55rem;border-radius:6px;cursor:pointer;font-weight:600}@media (max-width: 860px){.linkage-canvas{height:calc(100vh - 210px)}.statusbar{flex-wrap:wrap;gap:.5rem 1rem}}