.buying-tool{--bt-ink:#341c3d;--bt-accent:#71398a;--bt-soft:#e5d8eb;--bt-paper:#faf7f0;background:var(--bt-paper);color:var(--bt-ink);min-height:75vh;padding:38px 20px 80px}.bt-lighting{--bt-soft:#f8e7ba;--bt-accent:#6f4a08}.bt-ventilation{--bt-soft:#d5e7e2;--bt-accent:#285c59}.bt-calendar{--bt-soft:#e2e9d7;--bt-accent:#47643d}.bt-converter{--bt-soft:#e9dccc;--bt-accent:#735039}.bt-container{max-width:1220px;margin:auto}.bt-back{align-items:center;gap:8px;font-size:14px;text-decoration:none;display:inline-flex}.bt-hero{max-width:900px;padding:38px 0 20px}.bt-eyebrow{text-transform:uppercase;letter-spacing:.12em;align-items:center;gap:8px;font-size:12px;font-weight:700;display:flex}.bt-hero h1{letter-spacing:-.045em;margin:14px 0 20px;font-size:clamp(32px,5vw,64px);font-weight:800;line-height:1.08}.bt-hero h1 span{color:var(--bt-accent)}.bt-hero>p:not(.bt-eyebrow):not(.bt-message){max-width:730px;font-size:18px;line-height:1.65}.bt-actions{flex-wrap:wrap;gap:9px;margin-top:23px;display:flex}.buying-tool button{cursor:pointer}.bt-actions button,.bt-products-head button,.bt-product-actions button{background:#fff;border:1px solid #d5c9d5;border-radius:24px;justify-content:center;align-items:center;gap:7px;min-height:42px;padding:10px 16px;font-size:13px;font-weight:600;display:flex}.buying-tool button:disabled{opacity:.6;cursor:wait}.buying-tool :focus-visible{outline:3px solid var(--bt-accent);outline-offset:4px}.bt-message{min-height:18px;margin:10px 0 0;font-size:13px}.bt-layout{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);align-items:start;gap:30px;display:grid}.bt-controls{gap:18px;display:grid}.bt-step{background:#fff;border:1px solid #e7dfdf;border-radius:20px;padding:25px}.bt-step h2{align-items:center;gap:12px;margin:0 0 24px;font-size:20px;font-weight:700;display:flex}.bt-step h2>span{background:var(--bt-soft);color:var(--bt-accent);border-radius:50%;flex-shrink:0;place-items:center;width:30px;height:30px;font-size:13px;display:grid}.bt-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.bt-field{min-width:0}.bt-field label,.bt-choices legend{margin:0 0 9px;font-size:14px;font-weight:650;display:block}.bt-number{background:#fff;border:1px solid #d7cdd4;border-radius:10px;align-items:center;display:flex;overflow:hidden}.bt-number input{font-variant-numeric:tabular-nums;background:0 0;border:0;width:100%;min-width:0;padding:12px 10px;font-size:17px}.bt-number span{white-space:nowrap;color:#64596b;padding-right:10px;font-size:12px}.bt-field input[type=range]{width:100%;accent-color:var(--bt-accent);margin:12px 0 0}.bt-field select,.bt-field input[type=date]{background:#fff;border:1px solid #d7cdd4;border-radius:10px;width:100%;min-height:46px;padding:12px;font-size:14px}.bt-hint{color:#635762;margin:9px 0 0;font-size:12px;line-height:1.65}.bt-choices{border:0;min-width:0;margin:0 0 20px;padding:0}.bt-choices>div{flex-wrap:wrap;gap:7px;display:flex}.bt-choices button{background:#fff;border:1px solid #d5c9d5;border-radius:10px;min-height:43px;padding:11px 14px;font-size:13px}.bt-choices button[aria-pressed=true]{background:var(--bt-accent);border-color:var(--bt-accent);color:#fff}.bt-preview{background:var(--bt-soft);border:1px solid #dfd5cf;border-radius:24px;padding:26px;position:sticky;top:100px;overflow:hidden}.bt-preview h2{margin:0 0 6px;font-size:21px;font-weight:700}.bt-preview>svg{width:100%;height:auto;max-height:340px;margin:18px auto;display:block}.bt-preview-caption{color:#594c58;font-size:12px;line-height:1.6}.bt-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:22px;display:grid}.bt-stat{background:#fffc;border-radius:14px;min-width:0;padding:16px}.bt-stat>span{color:#67556b;font-size:12px;display:block}.bt-stat strong{overflow-wrap:anywhere;margin:5px 0;font-size:clamp(19px,2.5vw,28px);font-weight:750;line-height:1.2;display:block}.bt-stat small{font-size:11px;line-height:1.5;display:block}.bt-warning{background:#fff5df;border:1px solid #b78e39;border-radius:12px;margin:15px 0;padding:15px;font-size:14px;line-height:1.6}.bt-products{background:#fff;border:1px solid #e7dfdf;border-radius:20px;margin:28px 0;padding:25px}.bt-products-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:15px;display:flex}.bt-products-head h3{margin:0;font-size:21px;font-weight:700}.bt-product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:20px;display:grid}.bt-product{border:1px solid #ded5da;border-radius:15px;grid-template-columns:90px minmax(0,1fr);align-items:start;gap:14px;padding:16px;display:grid}.bt-product.is-selected{border:2px solid var(--bt-accent);padding:15px}.bt-product img{object-fit:contain;width:90px;height:100px}.bt-product h4{margin:8px 0;font-size:15px;font-weight:700;line-height:1.4}.bt-product p{margin:5px 0;font-size:12px}.bt-stock{color:#30644d;font-size:11px;font-weight:700}.bt-product-actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:12px;display:flex}.bt-product-actions a{font-size:13px;text-decoration:underline}.bt-preview:has(.bt-shopping){position:static}.bt-selection-preview{gap:8px;margin:16px 0;display:grid}.bt-selection-preview a{background:#ffffffd9;border-radius:12px;align-items:center;gap:12px;padding:10px;text-decoration:none;display:flex}.bt-selection-preview img,.bt-complement img,.bt-shopping-lines img{object-fit:contain;flex-shrink:0}.bt-selection-preview strong,.bt-selection-preview small{font-size:12px;line-height:1.5;display:block}.bt-selection-preview small{margin-top:3px;font-size:11px}.bt-shopping{background:#fff;border:1px solid #e0d7d6;border-radius:18px;margin-top:25px;padding:22px}.bt-shopping h2{font-size:22px;line-height:1.3}.bt-shopping .bt-eyebrow{letter-spacing:.07em;margin-bottom:12px;font-size:10px}.bt-owned,.bt-complement{cursor:pointer;align-items:center;gap:10px;padding:14px 0;scroll-margin-top:130px;font-size:13px;display:flex}.bt-owned small{margin-top:4px;font-size:11px;display:block}.bt-owned:has(.bt-field){display:block}.bt-owned input[type=checkbox],.bt-complement input{width:19px;height:19px;accent-color:var(--bt-accent);flex-shrink:0}.bt-complement{border-top:1px solid #e6dedf;border-bottom:1px solid #e6dedf}.bt-complement span{min-width:0;line-height:1.5}.bt-complement strong,.bt-complement small,.bt-complement span span,.bt-complement b{display:block}.bt-complement small{color:var(--bt-accent);font-size:9px;font-weight:700}.bt-complement span span{margin:5px 0;font-size:11px}.bt-shopping-lines{margin:14px 0;padding:0;list-style:none}.bt-shopping-lines li{border-bottom:1px solid #e6dedf;grid-template-columns:54px minmax(0,1fr) auto;align-items:start;gap:12px;padding:14px 0;font-size:12px;display:grid}.bt-shopping-lines strong{line-height:1.45;display:block}.bt-shopping-lines p{margin:5px 0 8px;font-size:11px;line-height:1.55}.bt-shopping-lines a{align-items:center;gap:4px;margin-top:8px;text-decoration:underline;display:flex}.bt-shopping-total{justify-content:space-between;align-items:center;gap:12px;padding:12px 0 18px;font-size:13px;display:flex}.bt-shopping-total small{margin-top:5px;font-size:10px;display:block}.bt-shopping-total strong{white-space:nowrap;font-size:26px}.bt-buy{background:var(--bt-accent);color:#fff;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;min-height:48px;padding:14px;font-size:13px;font-weight:700;display:flex}.bt-cart-link{justify-content:center;align-items:center;gap:6px;padding:12px;font-size:13px;text-decoration:underline;display:flex}@media (max-width:500px){.bt-shopping{padding:16px}.bt-shopping-lines li{grid-template-columns:42px minmax(0,1fr);gap:9px}.bt-shopping-lines img{width:42px;height:48px}.bt-shopping-lines li>b{grid-column:2}.bt-shopping-total{flex-wrap:wrap}}.bt-explanation{border-top:1px solid #ddd0dc;max-width:900px;margin-top:20px;padding:28px 0}.bt-explanation h2{margin:0 0 20px;font-size:25px;font-weight:700}.bt-explanation h3{margin:24px 0 8px;font-size:17px;font-weight:700}.bt-explanation p{margin:10px 0;font-size:15px;line-height:1.85}.bt-explanation a{text-decoration:underline}.bt-timeline{gap:10px;margin:25px 0;display:grid}.bt-stage{border-left:5px solid var(--bt-accent);background:#ffffffbf;border-radius:12px;padding:14px 16px}.bt-stage span{font-size:14px;font-weight:650}.bt-stage strong{margin-top:6px;font-size:12px;display:block}.bt-stage-bar{background:var(--bt-accent);border-radius:4px;min-width:3px;height:6px;margin-top:10px;transition:width .5s}.bt-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;margin:20px 0}.bt-table th,.bt-table td{text-align:left;border-bottom:1px solid #cfbdc9;padding:13px 8px;font-size:14px}.bt-table th{font-size:12px}.bt-air{stroke-dasharray:7 12;animation:1.5s linear infinite bt-flow}.bt-fan{transform-origin:330px 90px;animation:4s linear infinite bt-spin}.bt-light-cell{transition:opacity .5s,fill .5s}.bt-presets{margin-top:20px}.bt-inline-note{margin-top:16px;font-size:13px;line-height:1.7}.bt-ics{background:var(--bt-accent);color:#fff;border:0;border-radius:20px;min-height:42px;margin-top:18px;padding:11px 16px;font-size:13px}@keyframes bt-flow{to{stroke-dashoffset:-38px}}@keyframes bt-spin{to{transform:rotate(360deg)}}@media (max-width:800px){.bt-layout{grid-template-columns:1fr}.bt-preview{grid-row:1;position:static}.bt-product-grid{grid-template-columns:1fr}.bt-hero{padding-top:25px}.bt-preview{padding:20px}.buying-tool{padding:25px 16px 50px}}@media (max-width:380px){.bt-fields{grid-template-columns:1fr}.bt-step{padding:20px 16px}.bt-stats{gap:8px}.bt-stat{padding:13px 10px}.bt-product{grid-template-columns:65px minmax(0,1fr);gap:10px;padding:12px}.bt-product img{width:65px;height:85px}.bt-product.is-selected{padding:11px}}@media (prefers-reduced-motion:reduce){.buying-tool *{transition:none!important;animation:none!important}}@media print{.bt-back,.bt-actions,.bt-products button{display:none}.bt-layout{display:block}.bt-preview{margin:20px 0;position:static}.bt-controls{display:block}.bt-step{break-inside:avoid;margin-bottom:20px}.buying-tool{background:#fff;padding:0}}.buying-tool.bt-article{border:1px solid #d5c9d5;border-radius:24px;min-height:0;margin:28px 0;padding:20px;scroll-margin-top:110px}.bt-article .bt-hero{padding:0 0 18px}.bt-article .bt-hero h3{margin:10px 0 14px;font-size:clamp(22px,3vw,30px);font-weight:800;line-height:1.2}.bt-article .bt-step h4{align-items:center;gap:10px;margin:0 0 18px;font-size:19px;font-weight:700;display:flex}.bt-article .bt-step h4>span{background:var(--bt-soft);border-radius:50%;place-items:center;min-width:34px;height:34px;display:grid}.bt-article .bt-preview h4,.bt-article .bt-explanation h4{margin:0 0 18px;font-size:19px;font-weight:700}.bt-article .bt-explanation h5{font-size:16px;font-weight:700}@media (max-width:600px){.buying-tool.bt-article{padding:14px}}