.byb-app{max-width:980px;margin:24px auto;padding:18px;border:1px solid #e6e6e6;border-radius:16px;background:#fff}
.byb-header{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:14px}
.byb-title{margin:0;font-size:24px;line-height:1.2}
.byb-subtitle{margin:6px 0 0;color:#666}
.byb-steps{display:flex;gap:8px}
.byb-step-pill{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;border:1px solid #ddd;color:#777;font-weight:600}
.byb-step-pill.is-active{border-color:#111;color:#111}

.byb-body{min-height:320px}
.byb-screen{display:none}
.byb-screen.is-active{display:block}

.byb-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:12px}
@media (max-width:780px){.byb-grid{grid-template-columns:1fr}}
.byb-tile{padding:14px;border-radius:14px;border:1px solid #ddd;background:#fafafa;text-align:left;cursor:pointer}
.byb-tile[disabled]{opacity:.55;cursor:not-allowed}
.byb-tile-active{border-color:#111;background:#fff}
.byb-tile-title{font-weight:700}
.byb-tile-desc{color:#666;margin-top:6px}

.byb-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
@media (max-width:780px){.byb-form{grid-template-columns:1fr}}
.byb-form label{display:flex;flex-direction:column;gap:6px;font-weight:600}
.byb-form select{padding:10px;border-radius:10px;border:1px solid #ddd;background:#fff}
.byb-form-inline{grid-template-columns:repeat(2,minmax(0,1fr))}
.byb-hint{color:#666;margin-top:10px}

.byb-products{display:grid;gap:12px;margin-top:12px}
.byb-product{border:1px solid #ddd;border-radius:14px;padding:12px;background:#fff}
.byb-product.is-selected{border-color:#111}
.byb-product-top{display:flex;gap:12px;justify-content:space-between;align-items:flex-start}
.byb-product-title{font-weight:800}
.byb-product-meta{color:#666;margin-top:4px;font-size:13px}
.byb-product-notes{margin:10px 0 0;padding-left:18px;color:#444}
.byb-badge{display:inline-block;margin-left:8px;font-size:12px;border:1px solid #ddd;border-radius:999px;padding:2px 8px;color:#333}

.byb-footer{display:flex;justify-content:space-between;align-items:center;margin-top:14px;padding-top:14px;border-top:1px solid #eee}
.byb-btn{padding:10px 14px;border-radius:12px;border:1px solid #111;background:#111;color:#fff;font-weight:700;cursor:pointer}
.byb-btn-secondary{background:#fff;color:#111;border-color:#ddd}
.byb-btn:disabled{opacity:.6;cursor:not-allowed}

.byb-summary{display:grid;gap:12px;margin-top:12px}
.byb-card{border:1px solid #eee;border-radius:14px;padding:12px;background:#fafafa}
.byb-card h4{margin:0 0 8px}
.byb-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden}
.byb-table th,.byb-table td{padding:10px;border-bottom:1px solid #eee;text-align:left;font-size:14px}
.byb-table th{background:#f6f6f6}
.byb-error{padding:12px;border:1px solid #f0c;border-radius:12px}

/* Confidence */
.byb-confidence{display:flex;flex-direction:column;gap:10px}
.byb-confidence-top{display:flex;align-items:center;gap:10px}
.byb-confidence-title{font-weight:800}
.byb-confidence-meta{display:grid;gap:6px;color:#333}
.byb-badge-green{border-color:#b7e3c2;background:#eefaf1}

/* Diagram */
.byb-diagram{background:#fff;border:1px solid #eee;border-radius:14px;padding:12px}
.byb-diagram-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px}
.byb-node{padding:6px 10px;border:1px solid #ddd;border-radius:999px;background:#fafafa;font-weight:700;font-size:13px}
.byb-arrow{opacity:.6;font-weight:900}
.byb-diagram-foot{margin-top:6px}
.byb-muted{color:#666;font-size:13px}

/* Accordion */
.byb-accordion{display:grid;gap:10px}
.byb-acc-item{border:1px solid #eee;border-radius:14px;background:#fff;overflow:hidden}
.byb-acc-summary{cursor:pointer;padding:10px 12px;font-weight:800;background:#fafafa}
.byb-acc-body{padding:10px 12px}
.byb-acc-body ul{margin:0;padding-left:18px;color:#333}