:root{--purple-1:#7c3aed;--purple-2:#a855f7;--purple-dark:#6d28d9;--bg:#f3f4f6;--panel-bg:#ffffff;--border:#e5e7eb;--text:#1f2937;--text-muted:#6b7280;--accent:#2563eb;--accent-light:#eff6ff;--danger:#dc2626;--radius:10px;--shadow:0 1px 3px rgba(0,0,0,0.08),0 1px 2px rgba(0,0,0,0.04)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Meiryo,sans-serif;font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}.zk-header{background:linear-gradient(135deg,var(--purple-1),var(--purple-2));color:#fff;padding:20px 28px;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.zk-header-main{min-width:0}.zk-back-link{display:inline-block;margin-bottom:6px;color:#fff;opacity:.9;font-size:13px;font-weight:600;text-decoration:none}.zk-back-link:hover{opacity:1;text-decoration:underline}.zk-lang-seg{flex:0 0 auto;background:rgba(255,255,255,.18);border-radius:8px;overflow:hidden}.zk-lang-seg button{color:#fff;background:transparent;border:none;font-weight:600}.zk-lang-seg button.active{background:#fff;color:var(--purple-dark,#6d28d9)}.zk-header h1{margin:0;font-size:22px;font-weight:700;display:flex;align-items:center;gap:10px}.zk-header p{margin:4px 0 0;font-size:13px;opacity:.9}.zk-layout{display:flex;gap:16px;padding:16px;align-items:flex-start;max-width:1280px;margin:0 auto}.zk-left{width:300px;flex:0 0 300px;flex-direction:column}.zk-left,.zk-right{display:flex;gap:16px}.zk-right{flex:1 1 auto;min-width:0;flex-direction:column}@media (max-width:900px){.zk-layout{flex-direction:column}.zk-left{width:100%;flex:none}}.zk-panel{background:var(--panel-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.zk-panel-title{font-size:13px;font-weight:700;padding:12px 14px;border-bottom:1px solid var(--border);background:#fafafa;display:flex;align-items:center;gap:8px}.zk-panel-body{padding:14px}.zk-num-badge{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:50%;background:var(--purple-1);color:#fff;font-size:12px;font-weight:700;flex:none}.zk-shape-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:8px;gap:8px}.zk-shape-btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:10px 8px;font-size:13px;color:var(--text);transition:background .12s,border-color .12s;display:flex;align-items:center;justify-content:center;gap:6px}.zk-shape-btn:hover{background:var(--accent-light);border-color:var(--accent)}.zk-inline{display:flex;gap:8px;align-items:center;margin-top:8px}.zk-inline select{flex:1 1 auto}.zk-btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:8px 12px;font-size:13px;color:var(--text)}.zk-btn:hover{background:#f9fafb}.zk-btn-primary{background:var(--purple-1);border-color:var(--purple-1);color:#fff}.zk-btn-primary:hover{background:var(--purple-dark)}.zk-btn-danger{background:#fff;border-color:var(--danger);color:var(--danger)}.zk-btn-danger:hover{background:#fef2f2}.zk-btn:disabled{opacity:.45;cursor:not-allowed}.zk-field{margin-bottom:12px}.zk-field:last-child{margin-bottom:0}.zk-field label{display:block;font-size:12px;color:var(--text-muted);margin-bottom:4px;font-weight:600}.zk-field input[type=text],.zk-field select{width:100%;padding:7px 9px;border:1px solid var(--border);border-radius:7px;font-size:13px;background:#fff;color:var(--text)}.zk-check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text);cursor:pointer;margin-bottom:8px}.zk-check:last-child{margin-bottom:0}.zk-check input{width:16px;height:16px;accent-color:var(--purple-1)}.zk-seg{display:flex;border:1px solid var(--border);border-radius:7px;overflow:hidden}.zk-seg button{flex:1 1;border:none;background:#fff;padding:7px 4px;font-size:12px;color:var(--text);border-right:1px solid var(--border)}.zk-seg button:last-child{border-right:none}.zk-seg button.active{background:var(--purple-1);color:#fff}.zk-hint{font-size:12px;color:var(--text-muted);line-height:1.5}.zk-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.zk-toolbar .zk-spacer{flex:1 1 auto}.zk-canvas-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;display:flex;justify-content:center;overflow:auto}.zk-svg{touch-action:none;-webkit-user-select:none;-moz-user-select:none;user-select:none;display:block}.zk-svg .zk-body{cursor:move}.zk-handle{cursor:pointer}.zk-usage{background:var(--accent-light);border:1px solid #bfdbfe;border-radius:var(--radius);padding:14px 16px;font-size:13px;color:#1e3a8a}.zk-usage h3{margin:0 0 8px;font-size:13px;font-weight:700}.zk-usage ul{margin:0;padding-left:18px}.zk-usage li{margin-bottom:3px}.zk-toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#1f2937;color:#fff;padding:10px 18px;border-radius:8px;font-size:13px;box-shadow:0 4px 12px rgba(0,0,0,.25);z-index:1000}.zk-toast.error{background:var(--danger)}.zk-divider{width:1px;align-self:stretch;background:var(--border);margin:2px}.zk-marks{margin-top:4px;padding-top:10px;border-top:1px dashed var(--border)}.zk-seg.zk-wrap{flex-wrap:wrap;border:none;gap:4px;overflow:visible}.zk-seg.zk-wrap button{flex:0 0 auto;min-width:30px;border:1px solid var(--border);border-radius:6px}.zk-edge-marks{display:flex;flex-direction:column;gap:5px}.zk-edge-row{display:flex;align-items:center;gap:8px}.zk-edge-name{flex:0 0 52px;font-size:12px;color:var(--text-muted);white-space:nowrap}.zk-edge-row .zk-seg{flex:1 1 auto}