:root{
  --afc-border:#e5e7eb;
  --afc-bg:#ffffff;
  --afc-muted:#f8fafc;
  --afc-text:#111827;
}
*{box-sizing:border-box}
.afc-container{max-width:1200px;margin:0 auto;padding:16px}
.afc-title{font-size:22px;margin:8px 0 16px 0;color:var(--afc-text)}
.afc-help{border:1px solid var(--afc-border);background:#f9fafb;border-radius:12px;padding:12px;margin-bottom:14px;font-size:14px;color:#334155}
.afc-help ol{margin:6px 0 0 18px}
.afc-wrap{display:grid;grid-template-columns:240px minmax(0,1fr) 380px;gap:16px;width:100%}
.afc-left,.afc-center,.afc-right{min-width:0}
.afc-left{border-right:1px solid var(--afc-border);padding-right:8px}
.afc-steps{display:flex;flex-direction:column;gap:8px;position:sticky;top:12px}
.afc-steps button{padding:10px;border:1px solid var(--afc-border);background:var(--afc-muted);border-radius:10px;text-align:left;cursor:pointer}
.afc-steps button.active{background:#e0f2fe;border-color:#bae6fd}
.afc-center{background:var(--afc-bg);border:1px solid var(--afc-border);border-radius:12px;display:flex;flex-direction:column;align-items:center;padding:10px}
#afc-canvas{display:block;width:100%;height:auto;border:1px dashed var(--afc-border);border-radius:10px;background:#fff}
.afc-tools{margin-top:10px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.afc-right{border-left:1px solid var(--afc-border);padding-left:8px;max-height:calc(100vh - 200px);overflow:auto}
.afc-sec{margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--afc-border)}
.afc-sec small{display:block;color:#64748b;margin-top:6px}
.afc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.afc-card{border:1px solid var(--afc-border);border-radius:10px;padding:10px;background:#fff;cursor:pointer}
.afc-card.sel{outline:2px solid #111827;outline-offset:2px}
.afc-card-title{font-weight:600;margin-bottom:4px;color:#111827}
.afc-meta{font-size:12px;color:#6b7280}
.afc-summary .afc-row{display:flex;justify-content:space-between;margin:6px 0}
.afc-summary .afc-total{font-weight:700;font-size:16px;border-top:1px solid var(--afc-border);padding-top:8px}
.afc-warning{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:8px;padding:8px;margin:8px 0}
.afc-danger{background:#fee2e2;border:1px solid #fecaca;color:#991b1b;border-radius:8px;padding:8px;margin:8px 0}
.afc-actions{display:flex;gap:8px;flex-wrap:wrap}
@media (max-width: 1100px){
  .afc-wrap{grid-template-columns: 1fr; }
  .afc-left{order:1;border-right:none;border-bottom:1px solid var(--afc-border);padding:0 0 12px 0}
  .afc-center{order:2}
  .afc-right{order:3;border-left:none;padding:0}
  .afc-steps{flex-direction:row;flex-wrap:wrap;position:static;gap:6px}
  .afc-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width: 640px){
  .afc-container{padding:10px}
  .afc-grid{grid-template-columns:1fr}
  .afc-steps button{flex:1 1 48%}
}