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var(--border-default);border-radius:var(--radius-lg);width:92%;max-width:380px;max-height:85vh;box-shadow:var(--shadow-xl);background:#fff;padding:28px 24px;transition:transform .35s cubic-bezier(.34,1.56,.64,1);position:relative;overflow-y:auto;transform:scale(.92)translateY(12px)}.lang-modal.open .lang-modal__panel{transform:scale(1)translateY(0)}.lang-modal__header{border-bottom:1px solid var(--border-default);justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:16px;display:flex}.lang-modal__title{letter-spacing:.18em;text-transform:uppercase;background:var(--gradient-primary);-webkit-text-fill-color:transparent;background-clip:text;font-family:Outfit,sans-serif;font-size:.8rem;font-weight:700}.lang-modal__close{background:var(--gray-100);border:1px solid var(--border-default);border-radius:var(--radius-sm);width:32px;height:32px;color:var(--text-muted);cursor:pointer;transition:all 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#ffffff29;border-radius:8px;justify-content:center;align-items:center;padding:9px 12px;font-family:Inter,sans-serif;font-size:.85rem;font-weight:600;text-decoration:none;transition:all .2s;display:flex;color:#fff!important}.footer .lang-btn:hover{background:#ffffff2e;border-color:#ffffff59;transform:translateY(-1px);color:#fff!important}.footer .lang-btn.active{box-shadow:0 2px 8px #5a7a5c66;color:#fff!important;background:#5a7a5c!important;border-color:#72a276!important}[dir=rtl] .header .container,[dir=rtl] .header__nav{flex-direction:row-reverse}[dir=rtl] .tool-card__link{direction:ltr}@media (width<=768px){[dir=rtl] .header__nav{border-left:none;border-right:1px solid #ffffff0f;flex-direction:column;left:0;right:auto;transform:translate(-100%)}[dir=rtl] .header__nav.open{transform:translate(0)}}.cost-card-block{background:var(--bg-card);border:1.5px solid var(--border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-base), border-color var(--transition-base);margin-bottom:32px;padding:32px}.cost-card-block:hover{box-shadow:var(--shadow-md);border-color:var(--primary-300)}.cost-card-header{border-bottom:1px solid var(--border-light);align-items:center;gap:14px;margin-bottom:20px;padding-bottom:16px;display:flex}.cost-card-header__icon{border-radius:var(--radius-md);background:var(--primary-50);width:48px;height:48px;color:var(--primary-600);border:1px solid var(--primary-100);flex-shrink:0;justify-content:center;align-items:center;font-size:1.4rem;display:flex}.cost-card-header__title{color:var(--text-primary);margin:0;font-size:1.4rem;font-weight:700}.cost-badge-group{flex-wrap:wrap;gap:8px;margin:16px 0 20px;display:flex}.cost-badge-pill{border-radius:var(--radius-full);background:var(--bg-surface);border:1px solid var(--border-default);color:var(--text-secondary);align-items:center;gap:6px;padding:6px 14px;font-size:.825rem;font-weight:600;display:inline-flex}.flooring-materials-grid{grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0;display:grid}.flooring-material-card{background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-md);transition:transform var(--transition-fast), border-color var(--transition-fast);flex-direction:column;gap:12px;padding:20px;display:flex}.flooring-material-card:hover{border-color:var(--primary-400);box-shadow:var(--shadow-xs);transform:translateY(-3px)}.flooring-material-card__title{color:var(--primary-700);border-bottom:1px solid var(--border-light);align-items:center;gap:8px;padding-bottom:8px;font-size:1.1rem;font-weight:700;display:flex}.flooring-subitem{color:var(--text-secondary);font-size:.875rem;line-height:1.6}.flooring-subitem strong{color:var(--text-primary)}.cost-calc-widget-wrap{background:var(--bg-surface);border:1px dashed var(--primary-300);border-radius:var(--radius-md);margin-top:24px;padding:20px}@media (width<=900px){.flooring-materials-grid{grid-template-columns:1fr}}@media (width<=640px){.cost-card-block{padding:20px}}.formula-highlight-pill{background:var(--primary-50);border:1.5px solid var(--primary-300);border-radius:var(--radius-md);color:var(--primary-700);align-items:center;gap:10px;margin:16px 0;padding:12px 20px;font-family:Outfit,monospace;font-size:1.1rem;font-weight:700;display:inline-flex}.shape-quick-grid{grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0;display:grid}.shape-quick-card{background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-md);text-align:center;padding:14px;transition:transform .2s,border-color .2s}.shape-quick-card:hover{border-color:var(--primary-400);transform:translateY(-2px)}.shape-quick-card__title{color:var(--text-primary);margin-bottom:4px;font-family:Outfit,sans-serif;font-size:.95rem;font-weight:700}.shape-quick-card__formula{color:var(--primary-600);font-family:monospace;font-size:.85rem;font-weight:600}.step-workflow-grid{grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0;display:grid}.step-workflow-card{background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:18px;position:relative}.step-workflow-num{background:var(--primary-600);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;margin-bottom:10px;font-family:Outfit,sans-serif;font-size:.85rem;font-weight:700;display:flex}.step-workflow-card__title{color:var(--text-primary);margin-bottom:6px;font-family:Outfit,sans-serif;font-size:.95rem;font-weight:700}.step-workflow-card__desc{color:var(--text-muted);font-size:.85rem;line-height:1.5}@media (width<=768px){.shape-quick-grid{grid-template-columns:repeat(2,1fr)}.step-workflow-grid{grid-template-columns:1fr}}