:root{ --blue-600:#0d6efd; --text-muted:#6c757d; --line-1:#dee2e6;}.calc-card{background:var(--surface-card,#fff);border:1px solid var(--line-1,#dee2e6);border-radius:8px;margin-bottom:1rem;box-shadow:var(--shadow-sm,0 1px 2px rgba(13,27,42,.08));}.calc-card-header{padding:0.75rem 1.25rem;background-color:var(--blue-800,#e0f2fe);border-bottom:1px solid var(--line-1,#dee2e6);font-weight:700;}.calc-card-body{padding:1.25rem;}.calc-border-green{border-color:#198754 !important;}.calc-header-green{background-color:#198754;color:#fff;}.calc-header-blue-info{background-color:var(--blue-700,#caf0f8);}.calc-step-grid{margin-top:1rem;}.calc-formula-col{margin-bottom:1rem;}.calc-formula-col h6{color:var(--text-muted,#6c757d);font-weight:400;font-size:0.9rem;margin-bottom:0.5rem;text-transform:none;letter-spacing:0;display:flex;align-items:center;gap:0.5rem;}.calc-math-box{overflow-x:auto;padding:10px;background:var(--surface-card,#fff);border:1px solid var(--line-1,#dee2e6);border-radius:4px;}.calc-rule-box{background:var(--surface-bg,#f8f9fa);border-left:4px solid var(--blue-600,#0077b6);padding:1rem;border-radius:4px;}.calc-btn-group a{font-size:0.85rem;padding:0.25rem 0.75rem;border:1px solid var(--line-1,#dee2e6);border-radius:4px;color:var(--ink-900,#212529);margin-right:0.5rem;text-decoration:none;}.calc-btn-group a:hover{background-color:var(--surface-bg,#f8f9fa);}.calc-badge{display:inline-block;padding:.35em .65em;font-size:.75em;font-weight:700;line-height:1;color:#fff;text-align:center;white-space:nowrap;vertical-align:baseline;border-radius:.375rem;margin-left:0.25rem;}.calc-badge-green{background-color:#198754;}.calc-badge-red{background-color:#dc3545;}