.wk-m2-calculator{margin:12px 0;padding:12px;border:1px solid #e2e2e2;border-radius:4px;background:#fafafa}
.wk-m2-label{display:block;font-weight:600;margin-bottom:6px}
.wk-m2-row{display:flex;align-items:center;gap:8px}
.wk-m2-input{width:140px}
.wk-m2-hint{color:#666;font-size:.9em}
.wk-m2-note{margin-top:6px;color:#444;font-size:.9em}