.bb-calc-box{border:1px solid #e5e5e5;padding:16px;margin:16px 0;border-radius:10px}
.bb-calc-title{margin:0 0 12px;font-size:1.1em}
.bb-calc-grid{display:grid;grid-template-columns:1fr;gap:12px}
.bb-calc-grid label{display:flex;flex-direction:column;font-size:.95em;gap:6px}
.bb-calc-grid select{padding:8px;border:1px solid #ccc;border-radius:6px;height:44px;font-size:16px}
.bb-calc-price-row{display:flex;justify-content:space-between;align-items:flex-start;margin-top:12px;gap:12px;flex-direction:column;border-top:1px solid #eee;padding-top:12px}
.bb-calc-msg{color:#b00020;font-size:.95em}
.bb-calc-spine{margin-top:10px;padding-top:10px;border-top:1px dashed #eee}
.bb-calc-spine-line{font-weight:600}
.bb-calc-spine-note{font-size:.95em;opacity:.85;margin-top:4px}