:root{
  --mrf-blue: #2563eb;      /* primary blue */
  --mrf-blue-dark:#1d4ed8;  /* hover */
  --mrf-blue-ring:#93c5fd;  /* focus ring */
  --mrf-border:#e5e7eb;
  --mrf-text:#111827;
  --mrf-muted:#6b7280;
  --mrf-bg:#ffffff;
  --mrf-accent-soft:#eff6ff;
}
.mrf-wrap{border:1px solid var(--mrf-border);border-radius:14px;padding:20px;max-width:860px;background:var(--mrf-bg);box-shadow:0 1px 2px rgba(0,0,0,.04)}
.mrf-title{margin-top:0;margin-bottom:16px;font-size:1.25rem;line-height:1.4;color:var(--mrf-text)}
.mrf-form .mrf-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.mrf-form label{display:flex;flex-direction:column;font-size:.95rem;color:var(--mrf-text);position:relative}
.mrf-form label > span{display:flex;align-items:center;gap:8px}
.mrf-help-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:9999px;background:var(--mrf-blue);color:#fff;font-size:.8rem;line-height:1;cursor:help;position:relative;outline:none}
.mrf-help-icon:focus{box-shadow:0 0 0 3px var(--mrf-blue-ring)}
.mrf-help-icon::after{content:attr(data-tip);position:absolute;left:50%;transform:translateX(-50%);bottom:125%;white-space:normal;min-width:220px;max-width:320px;background:#111827;color:#fff;padding:8px 10px;border-radius:8px;font-size:.8rem;line-height:1.2;opacity:0;pointer-events:none;transition:opacity .12s ease, transform .12s ease;box-shadow:0 6px 24px rgba(0,0,0,.18)}
.mrf-help-icon:hover::after,.mrf-help-icon.mrf-tip-show::after{opacity:1;transform:translate(-50%,-4px)}
.mrf-form input, .mrf-form select{padding:10px 12px;border:1px solid #d1d5db;border-radius:10px;font-size:1rem;background:#fff}
.mrf-form input:focus, .mrf-form select:focus{outline:2px solid var(--mrf-blue-ring);outline-offset:2px;border-color:var(--mrf-blue)}
.mrf-actions{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}
.mrf-btn{border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer;transition:background .15s ease, color .15s ease, border-color .15s ease}
.mrf-btn-primary{background:var(--mrf-blue);color:#fff;border:1px solid var(--mrf-blue)}
.mrf-btn-primary:hover{background:var(--mrf-blue-dark);border-color:var(--mrf-blue-dark);color:#fff}
.mrf-btn-outline{background:#fff;color:var(--mrf-blue);border:1px solid var(--mrf-blue)}
.mrf-btn-outline:hover{background:#eff6ff}
.mrf-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}
.mrf-result{border:1px solid var(--mrf-border);border-radius:12px;padding:12px}
.mrf-result-emphasis{grid-column:1/-1;background:var(--mrf-accent-soft);border-color:var(--mrf-blue)}
.mrf-result-label{font-size:.95rem;color:#1f2937}
.mrf-result-value{font-size:1.35rem;font-weight:800;margin-top:4px}
.mrf-result-value-xl{font-size:1.75rem}
.mrf-result-note{font-size:.85rem;color:var(--mrf-muted);margin-top:4px}
.mrf-help{margin-top:16px;font-size:.95rem;color:var(--mrf-text)}
.mrf-gf-wrap{margin-top:22px;padding-top:16px;border-top:1px dashed var(--mrf-border)}
.mrf-gf-hint{margin-top:16px;color:#374151;font-size:.95rem}
@media (max-width:720px){
  .mrf-form .mrf-grid, .mrf-results{grid-template-columns:1fr}
}

.mrf-cta{margin-top:24px;margin-bottom:12px;font-size:1.1rem;text-align:center;color:#2563eb}