Revise paste Custom Calculator

<script type="application/json" id="win-calc-config">
{
  "MODELS": [
    {"id":"win_fixed","label":"Прозорец глух","img":"линк към снимката за дограма"},
    {"id":"win_single","label":"Прозорец еднокрил","img":"линк към снимката за дограма"},
    {"id":"win_double","label":"Прозорец двукрил","img":"линк към снимката за дограма"},
    {"id":"win_divider","label":"Прозорец с делител","img":"линк към снимката за дограма"},
    {"id":"door_balcony","label":"Балконска врата","img":"линк към снимката за дограма"},
    {"id":"door_balcony_div","label":"Балконска врата с делител","img":"линк към снимката за дограма"},
    {"id":"win_tilt","label":"Прозорец tilt & turn","img":"линк към снимката за дограма"},
    {"id":"win_panorama","label":"Панорамен прозорец","img":"линк към снимката за дограма"}
  ],
  "PRICING": {
    "eurRate": 1.95583,
    "vatRate": 0.2,

"profilePerMeter": { "pvc":45, "alu":70, "wood":85 },
    "colorMultiplier": { "white":1, "oneSideColor":1.15, "bothSidesColor":1.25 },

"glazingPerM2": { "double24":85, "triple36":120 },
    "glazingAddersPerM2": { "lowE":25, "fourSeasons":40, "argon":10 },

"hardware": { "fixed":0, "single":55, "double":95, "tiltTurn":75 },

"mosquito": 35,
    "rollerShutterPerM2": 120,
    "innerSillPerMeter": 18,
    "dripEdgePerMeter": 15,

"uninstallPerWindow": 20,
    "installPerWindow": 45,
    "finishingPerMeter": 14,
    "transportPerKm": 1.96,

"labels": {
      "profile": "Профили (периметър)",
      "glazing": "Стъклопакет",
      "hardware": "Обков",
      "mosquito": "Комарници",
      "rollerShutter": "Ролетна щора",
      "innerSill": "Вътрешен перваз",
      "dripEdge": "Външен водобран",
      "uninstall": "Демонтаж",
      "install": "Монтаж",
      "finishing": "Обръщане",
      "transport": "Транспорт",
      "vat": "ДДС (20%)",
      "discount": "Отстъпка"
    },

"enabled": {
      "mosquito": false,
      "rollerShutter": true,
      "innerSill": true,
      "dripEdge": true,
      "uninstall": true,
      "install": true,
      "finishing": false,
      "transport": true
    },

"fixedAdders": []
  }
}
</script>

<div id="win-calc" class="idi-win">
  <style>
    .idi-win{--c:#0ea5e9;--bg:#0b1220;--panel:#121a2a;--muted:#8aa0bd;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:#e6eefb;border-radius:18px;}
    .idi-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    @media(max-width:980px){.idi-grid{grid-template-columns:1fr}}
    .idi-card{background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:16px}
    .idi-title{font-size:22px;font-weight:800;margin:0 0 12px}
    .idi-sub{font-size:12px;color:var(--muted);margin:-4px 0 10px}
    .idi-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;margin:10px 0}
    .idi-row label{font-size:14px}
    .idi-row input[type="number"],.idi-row select{width:190px;background:#0e1626;color:#e6eefb;border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:8px 10px}
    .idi-check{display:flex;align-items:center;gap:10px;margin:6px 0}
    .idi-check input{transform:scale(1.15)}
    .idi-divider{height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.14),transparent);margin:14px 0}
    .idi-models{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
    @media(max-width:980px){.idi-models{grid-template-columns:repeat(2,1fr)}}
    .idi-model{background:#0e1626;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:10px;cursor:pointer;text-align:center;font-size:13px;line-height:1.2}
    .idi-model:hover{border-color:rgba(255,255,255,.25)}
    .idi-model.active{outline:2px solid var(--c);box-shadow:0 0 0 2px rgba(14,165,233,.25) inset}
    .idi-model img{width:100%;max-height:90px;object-fit:contain;margin-bottom:6px;display:block}
    .idi-model.idi-img-error::before{content:"(снимката не се зареди)";display:block;font-size:11px;color:#ffb4b4;margin-bottom:6px}
    .idi-badges{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
    .idi-badge{background:#0e1626;border:1px solid rgba(255,255,255,.08);padding:4px 8px;border-radius:999px;font-size:12px;color:#9fb2d0}
    .idi-breakdown{list-style:none;margin:8px 0 0;padding:0}
    .idi-breakdown li{display:flex;justify-content:space-between;border-bottom:1px dashed rgba(255,255,255,.1);padding:7px 0}
    .idi-total{font-size:28px;font-weight:900}
    .idi-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
    .idi-btn{background:var(--c);border:none;color:#021322;font-weight:800;padding:10px 14px;border-radius:12px;cursor:pointer}
    .idi-btn.secondary{background:#0e1626;color:#e6eefb;border:1px solid rgba(255,255,255,.15)}
    .idi-note{font-size:12px;color:#8aa0bd;margin-top:6px}
    .idi-model-preview{margin-top:10px;background:#0e1626;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px}
    .idi-model-preview img{max-width:100%;height:auto;display:block;margin:0 auto}
    .idi-model-caption{font-size:12px;color:#9fb2d0;text-align:center;margin-top:6px}
  </style>

<div class="idi-grid">
    
    <div class="idi-card">
      <h3 class="idi-title">Калкулатор за дограма</h3>
      <p class="idi-sub">1) Изберете модел → 2) Попълнете параметрите → 3) Вижте разбивката и тотала (BGN/EUR).</p>

<div class="idi-sub">Модел</div>
      <div class="idi-models" id="modelsWrap"></div>

<div id="formWrap" style="display:none">
        <div class="idi-divider"></div>
        <div class="idi-row"><label>Материал</label>
          <select id="material">
            <option value="" selected disabled hidden>— Изберете —</option>
            <option value="pvc">PVC</option><option value="alu">Алуминий</option><option value="wood">Дърво</option>
          </select>
        </div>
        <div class="idi-row"><label>Цвят</label>
          <select id="color">
            <option value="" selected disabled hidden>— Изберете —</option>
            <option value="white">Бял</option><option value="oneSideColor">Едностранно цветен</option><option value="bothSidesColor">Двустранно цветен</option>
          </select>
        </div>
        <div class="idi-row"><label>Ширина (см)</label><input id="width" type="number" min="30" max="350" step="1" placeholder="напр. 120"></div>
        <div class="idi-row"><label>Височина (см)</label><input id="height" type="number" min="30" max="350" step="1" placeholder="напр. 140"></div>
        <div class="idi-row"><label>Разделител (делител)</label>
          <select id="divider">
            <option value="" selected disabled hidden>— Изберете —</option>
            <option value="none">Без</option><option value="vertical">Вертикален</option><option value="horizontal">Хоризонтален</option>
          </select>
        </div>
        <div class="idi-row"><label>Стъклопакет (база)</label>
          <select id="glazingBase">
            <option value="" selected disabled hidden>— Изберете —</option>
            <option value="double24">Двоен 24 мм</option><option value="triple36">Троен 36 мм</option>
          </select>
        </div>
        <div class="idi-check"><input id="gLowE" type="checkbox"><label for="gLowE">Low-E добавка</label></div>
        <div class="idi-check"><input id="gFour" type="checkbox"><label for="gFour">4 сезона добавка</label></div>
        <div class="idi-check"><input id="gArgon" type="checkbox"><label for="gArgon">Аргон добавка</label></div>
        <div class="idi-row"><label>Отваряемост / Обков</label>
          <select id="hardware">
            <option value="" selected disabled hidden>— Изберете —</option>
            <option value="fixed">Глух</option><option value="single">Еднокрила</option><option value="double">Двукрила</option><option value="tiltTurn">Падащо-отваряема</option>
          </select>
        </div>

<div class="idi-divider"></div>
        <div class="idi-sub">Екстри</div>
        <div class="idi-row"><label>Комарници (бр.)</label><input id="mosquitoQty" type="number" min="0" step="1" value="0"></div>
        <div class="idi-row"><label>Външна ролетна щора</label>
          <select id="shutterYes"><option value="" selected disabled hidden>— Изберете —</option><option value="no">Не</option><option value="yes">Да</option></select>
        </div>
        <div class="idi-row"><label>Вътрешен перваз</label>
          <select id="innerSillYes"><option value="" selected disabled hidden>— Изберете —</option><option value="no">Не</option><option value="yes">Да</option></select>
        </div>
        <div class="idi-row"><label>Външен водобран</label>
          <select id="dripYes"><option value="" selected disabled hidden>— Изберете —</option><option value="no">Не</option><option value="yes">Да</option></select>
        </div>

<div class="idi-divider"></div>
        <div class="idi-sub">Услуги</div>
        <div class="idi-check"><input id="uninstallOld" type="checkbox"><label for="uninstallOld">Демонтаж на стара дограма</label></div>
        <div class="idi-check"><input id="installNew" type="checkbox"><label for="installNew">Монтаж</label></div>
        <div class="idi-check"><input id="finishing" type="checkbox"><label for="finishing">Обръщане/довършителни работи</label></div>
        <div class="idi-row"><label>Транспорт (км)</label><input id="distanceKm" type="number" min="0" step="1" value="0"></div>

<div class="idi-divider"></div>
        <div class="idi-row"><label>Отстъпка (%)</label><input id="discount" type="number" min="0" max="100" step="1" value="0"></div>
        <div class="idi-check"><input id="vatOn" type="checkbox" checked><label for="vatOn">Включи ДДС (20%)</label></div>
      </div>
    </div>

<div class="idi-card">
      <h3 class="idi-title">Обобщение</h3>
      <div class="idi-badges" id="badges"></div>
      <ul class="idi-breakdown" id="breakdown"></ul>
      <div class="idi-divider"></div>
      <div class="idi-row">
        <div><div class="idi-sub">Общо (BGN)</div><div class="idi-total" id="totalBGN">—</div></div>
        <div><div class="idi-sub">Общо (EUR)</div><div class="idi-total" id="totalEUR">—</div></div>
      </div>
      <div class="idi-actions">
        <button class="idi-btn" id="copyQuote">Копирай офертата</button>
        <button class="idi-btn secondary" id="pdfExport" type="button">Експорт PDF</button>
        <button class="idi-btn secondary" id="resetForm" type="button">Нулирай</button>
      </div>
      <p class="idi-note">* Резултатът е ориентировъчен и зависи от точните размери и спецификация.</p>
      <p class="idi-note">* EUR при курс 1 EUR = 1.95583 BGN.</p>
    </div>
  </div>

// -- DOM елементи
      const $ = id => document.getElementById(id);
      const modelsWrap=$('modelsWrap'), formWrap=$('formWrap'), modelPreview=$('modelPreview'),
            modelImg=$('modelImg'), modelCaption=$('modelCaption');
      const material=$('material'), color=$('color'), width=$('width'), height=$('height');
      const divider=$('divider'), glazingBase=$('glazingBase');
      const gLowE=$('gLowE'), gFour=$('gFour'), gArgon=$('gArgon');
      const hardware=$('hardware'), mosquitoQty=$('mosquitoQty');
      const shutterYes=$('shutterYes'), innerSillYes=$('innerSillYes'), dripYes=$('dripYes');
      const uninstallOld=$('uninstallOld'), installNew=$('installNew'), finishing=$('finishing');
      const distanceKm=$('distanceKm'), discount=$('discount'), vatOn=$('vatOn');
      const badges=$('badges'), breakdown=$('breakdown'), totalBGN=$('totalBGN'), totalEUR=$('totalEUR');
      const copyBtn=$('copyQuote'), pdfBtn=$('pdfExport'), resetBtn=$('resetForm');

// -- Помощни
      const fmtBGN = n => new Intl.NumberFormat('bg-BG',{style:'currency',currency:'BGN',maximumFractionDigits:0}).format(n);
      const fmtEUR = n => new Intl.NumberFormat('de-DE',{style:'currency',currency:'EUR',maximumFractionDigits:0}).format(n);
      const toEUR  = bgn => bgn/PRICING.eurRate;
      const clamp  = (v,min,max)=>Math.min(Math.max(v,min),max);
      const badge  = txt => `<span class="idi-badge">${txt}</span>`;
      const m2     = (wcm,hcm)=> (wcm/100)*(hcm/100);
      const perim  = (wcm,hcm)=> 2*((wcm/100)+(hcm/100));
      const L   = (k, def) => (PRICING.labels && PRICING.labels[k]) || def;
      const ON  = (k) => !PRICING.enabled || PRICING.enabled[k] !== false;

// -- Рендер на моделите (с cache-buster и fallback)
      let selectedModel = '';
      function renderModels(){
        modelsWrap.innerHTML='';
        MODELS.forEach(m=>{
          const d=document.createElement('div'); d.className='idi-model'; d.dataset.id=m.id;
          const src = (m.img||'').trim();
          const imgTag = src
            ? `<img loading="lazy" src="${src}${src.includes('?')?'&':'?'}v=${Date.now()}" alt="${m.label}" onerror="this.closest('.idi-model').classList.add('idi-img-error'); this.remove();">`
            : '';
          d.innerHTML = imgTag + `<div>${m.label}</div>`;
          d.addEventListener('click',()=>{
            selectedModel=m.id;
            [...modelsWrap.children].forEach(x=>x.classList.remove('active'));
            d.classList.add('active');
            const previewSrc = src ? src + (src.includes('?')?'&':'?') + 'v='+Date.now() : '';
            modelImg.src = previewSrc;
            modelImg.alt = m.label; modelCaption.textContent = m.label;
            modelPreview.style.display = 'block';
            formWrap.style.display='block';
            calculate();
          });
          modelsWrap.appendChild(d);
        });
      }
      renderModels();

// -- Скриване/показване на полета според PRICING.enabled
      function toggleRow(idOrEl, on) {
        const el = typeof idOrEl === 'string' ? document.getElementById(idOrEl) : idOrEl;
        if (!el) return;
        const wrap = el.closest('.idi-row') || el.closest('.idi-check');
        if (!wrap) return;
        wrap.style.display = on ? '' : 'none';
        if (!on) {
          if (el.tagName === 'SELECT') el.selectedIndex = 0;
          else if (el.type === 'checkbox') el.checked = false;
          else if (el.type === 'number') el.value = '';
        }
      }
      function applyEnabledVisibility(){
        const e = PRICING.enabled || {};
        toggleRow('mosquitoQty',   e.mosquito       !== false);
        toggleRow('shutterYes',    e.rollerShutter !== false);
        toggleRow('innerSillYes',  e.innerSill     !== false);
        toggleRow('dripYes',       e.dripEdge      !== false);
        toggleRow('uninstallOld',  e.uninstall     !== false);
        toggleRow('installNew',    e.install       !== false);
        toggleRow('finishing',     e.finishing     !== false);
        toggleRow('distanceKm',    e.transport     !== false);
      }
      applyEnabledVisibility();

// -- Готовност на формата
      function ready(){
        if(!selectedModel) return false;
        if(!material.value || !color.value || !glazingBase.value || !hardware.value) return false;
        const W=parseFloat(width.value||0), H=parseFloat(height.value||0);
        return (W>0 && H>0);
      }

// -- Последна калкулация (за PDF/копиране)
      let LAST = null;

function gatherSelections(W,H,discP){
        return {
          Модел: (MODELS.find(x=>x.id===selectedModel)?.label || ''),
          Материал: {pvc:'PVC', alu:'Алуминий', wood:'Дърво'}[material.value] || '',
          Цвят: {white:'Бял', oneSideColor:'Едностранно цветен', bothSidesColor:'Двустранно цветен'}[color.value] || '',
          Размер: `${W} × ${H} см`,
          Делител: {none:'Без', vertical:'Вертикален', horizontal:'Хоризонтален'}[divider.value||'none'] || '—',
          'Стъклопакет (база)': {double24:'Двоен 24 мм', triple36:'Троен 36 мм'}[glazingBase.value] || '',
          'Добавки към стъклопакет': [
            gLowE.checked?'Low-E':null,
            gFour.checked?'4 сезона':null,
            gArgon.checked?'Аргон':null
          ].filter(Boolean).join(', ') || '—',
          Обков: {fixed:'Глух', single:'Еднокрила', double:'Двукрила', tiltTurn:'Падащо-отваряема'}[hardware.value] || '',
          'Комарници (бр.)': parseInt(mosquitoQty.value||'0',10),
          'Ролетна щора': {yes:'Да', no:'Не'}[shutterYes.value||'no'] || '—',
          'Вътрешен перваз': {yes:'Да', no:'Не'}[innerSillYes.value||'no'] || '—',
          'Външен водобран': {yes:'Да', no:'Не'}[dripYes.value||'no'] || '—',
          Демонтаж: uninstallOld.checked ? 'Да' : 'Не',
          Монтаж: installNew.checked ? 'Да' : 'Не',
          'Обръщане/довършителни': finishing.checked ? 'Да' : 'Не',
          'Транспорт (км)': parseFloat(distanceKm.value||'0'),
          'Отстъпка (%)': discP,
          'ДДС включено': vatOn.checked ? 'Да' : 'Не'
        };
      }

// -- Калкулация
      function calculate(){
        if(!ready()){
          breakdown.innerHTML='';
          badges.innerHTML = selectedModel ? badge(MODELS.find(x=>x.id===selectedModel)?.label||'') : '';
          totalBGN.textContent='—'; totalEUR.textContent='—';
          LAST=null;
          return;
        }

const W = clamp(parseFloat(width.value),30,350);
        const H = clamp(parseFloat(height.value),30,350);
        const area = m2(W,H);
        const perimeter = perim(W,H);

const profPrice = PRICING.profilePerMeter[material.value];
        const colorK    = PRICING.colorMultiplier[color.value] || 1;
        let profileCost = perimeter * profPrice * colorK;
        if(divider.value==='vertical'){ profileCost += (H/100) * profPrice * colorK; }
        else if(divider.value==='horizontal'){ profileCost += (W/100) * profPrice * colorK; }

let glazingCost = area * PRICING.glazingPerM2[glazingBase.value];
        if(gLowE.checked)  glazingCost += area * PRICING.glazingAddersPerM2.lowE;
        if(gFour.checked)  glazingCost += area * PRICING.glazingAddersPerM2.fourSeasons;
        if(gArgon.checked) glazingCost += area * PRICING.glazingAddersPerM2.argon;

const hardwareCost = PRICING.hardware[hardware.value];

const e = PRICING.enabled || {};
        const widthMeters  = W/100;

const mosquitoCost = (e.mosquito === false) ? 0
          : (parseInt(mosquitoQty.value||'0',10)) * PRICING.mosquito;

const shutterCost  = (e.rollerShutter === false) ? 0
          : (shutterYes.value==='yes' ? (area * PRICING.rollerShutterPerM2) : 0);

const innerSillCost= (e.innerSill === false) ? 0
          : (innerSillYes.value==='yes' ? (widthMeters * PRICING.innerSillPerMeter) : 0);

const dripCost     = (e.dripEdge === false) ? 0
          : (dripYes.value==='yes' ? (widthMeters * PRICING.dripEdgePerMeter) : 0);

const uninstallCost = (e.uninstall === false) ? 0
          : (uninstallOld.checked ? PRICING.uninstallPerWindow : 0);

const installCost   = (e.install === false) ? 0
          : (installNew.checked ? PRICING.installPerWindow : 0);

const finishingCost = (e.finishing === false) ? 0
          : (finishing.checked ? (perimeter * PRICING.finishingPerMeter) : 0);

const transportCost = (e.transport === false) ? 0
          : ((parseFloat(distanceKm.value||'0')>0) ? (parseFloat(distanceKm.value)*PRICING.transportPerKm) : 0);

// Редове за разбивката
        const items = [];
        if (ON('profile'))    items.push([L('profile','Профили (периметър)'), Math.round(profileCost)]);
        if (ON('glazing'))    items.push([L('glazing','Стъклопакет'),        Math.round(glazingCost)]);
        if (ON('hardware'))   items.push([L('hardware','Обков'),             Math.round(hardwareCost)]);
        if (mosquitoCost && ON('mosquito'))     items.push([L('mosquito','Комарници'),        Math.round(mosquitoCost)]);
        if (shutterCost && ON('rollerShutter')) items.push([L('rollerShutter','Ролетна щора'), Math.round(shutterCost)]);
        if (innerSillCost && ON('innerSill'))   items.push([L('innerSill','Вътрешен перваз'),  Math.round(innerSillCost)]);
        if (dripCost && ON('dripEdge'))         items.push([L('dripEdge','Външен водобран'),   Math.round(dripCost)]);
        if (uninstallCost && ON('uninstall'))   items.push([L('uninstall','Демонтаж'),         Math.round(uninstallCost)]);
        if (installCost && ON('install'))       items.push([L('install','Монтаж'),             Math.round(installCost)]);
        if (finishingCost && ON('finishing'))   items.push([L('finishing','Обръщане'),         Math.round(finishingCost)]);
        if (transportCost && ON('transport'))   items.push([L('transport','Транспорт'),        Math.round(transportCost)]);

if (Array.isArray(PRICING.fixedAdders)) {
          for (const adder of PRICING.fixedAdders) {
            const amt = Number(adder && adder.amount);
            if (!isNaN(amt) && amt !== 0) items.push([adder.label || 'Допълнителна позиция', Math.round(amt)]);
          }
        }

let subtotal = items.reduce((s, it)=> s + (typeof it[1]==='number' ? it[1] : 0), 0);
        const discP = clamp(parseFloat(discount.value||'0'),0,100);
        const discAmount = Math.round(subtotal * (discP/100));
        let afterDisc = subtotal - discAmount;
        const vat = vatOn.checked ? Math.round(afterDisc * PRICING.vatRate) : 0;
        const total = afterDisc + vat;

// Баджове
        const modelObj = MODELS.find(x=>x.id===selectedModel) || {};
        const badgeList = [];
        badgeList.push(badge(modelObj.label || ''));
        badgeList.push(badge((material.value||'').toUpperCase()));
        badgeList.push(badge(color.value==='white'?'бял':(color.value==='oneSideColor'?'едностранно':'двустранно')));
        badgeList.push(badge((glazingBase.value||'').replace('double24','двоен 24').replace('triple36','троен 36')));
        if(gLowE.checked)  badgeList.push(badge('Low-E'));
        if(gFour.checked)  badgeList.push(badge('4 сезона'));
        if(gArgon.checked) badgeList.push(badge('аргон'));
        badgeList.push(badge({fixed:'Глух', single:'Еднокрила', double:'Двукрила', tiltTurn:'Падащо-отваряема'}[hardware.value]||''));
        badges.innerHTML = badgeList.join('');

// Рендер на разбивката
        breakdown.innerHTML =
          items.map(([t,v])=>`<li><span>${t}</span><strong>${fmtBGN(v)}</strong></li>`).join('') +
          (discAmount? `<li><span>${L('discount','Отстъпка')} (${discP}%)</span><strong>- ${fmtBGN(discAmount)}</strong></li>`:'') +
          (vat? `<li><span>${L('vat','ДДС (20%)')}</span><strong>${fmtBGN(vat)}</strong></li>`:'');

totalBGN.textContent = fmtBGN(total);
        totalEUR.textContent = fmtEUR(toEUR(total));

// Копиране на офертата
        const selections = gatherSelections(W,H,discP);
        copyBtn.onclick = () => {
          const txt = makePlainText(items, discP, discAmount, vat, total, selections);
          navigator.clipboard.writeText(txt).then(()=>{
            copyBtn.textContent='Копирано!';
            setTimeout(()=>copyBtn.textContent='Копирай офертата',1200);
          });
        };

// Запази за PDF
        LAST = {
          items, discP, discAmount, vat, total,
          eur: Math.round(total/PRICING.eurRate),
          selections,
          modelLabel: modelObj.label || '',
          modelSrc: (modelObj.img||'')
        };
      }

// -- Експорт в PDF (Print → Save as PDF) — без <script> в темплейта
      function exportPDF(){
        if(!LAST){ alert('Попълнете параметрите и генерирайте калкулацията преди експорт.'); return; }

const now = new Date();
        const dateStr = new Intl.DateTimeFormat('bg-BG', {
          year:'numeric', month:'2-digit', day:'2-digit',
          hour:'2-digit', minute:'2-digit'
        }).format(now);

const selHTML = Object.entries(LAST.selections)
          .map(([k,v])=>`<div class="row"><span class="k">${k}</span><span class="v">${v}</span></div>`).join('');

const logoOrModel = LAST.modelSrc
          ? `<img class="hero" src="${LAST.modelSrc}" alt="${LAST.modelLabel}">`
          : '';

<div class="grid">
      <div class="card">
        <h2>Параметри</h2>
        ${selHTML}
      </div>
      <div class="card">
        <h2>Разбивка</h2>
        <table>${rowsHTML}</table>
        <div class="total">ОБЩО: ${LAST.total} лв (≈ ${LAST.eur} EUR)</div>
        <div class="muted">Курс: 1 EUR = ${PRICING.eurRate} BGN</div>
      </div>
    </div>

<div class="footer">
      * Офертата е ориентировъчна и подлежи на уточнение след оглед/детайлизиране.
    </div>

<div class="no-print" style="margin-top:16px">
      <button onclick="window.print()">Печат / Запази като PDF</button>
    </div>
  </div>
</body>
</html>`;

const w = window.open('', '_blank', 'width=900,height=900');
        if(!w){ alert('Моля, разрешете pop-up за този сайт, за да се отвори PDF прозорец.'); return; }
        w.document.write(html);
        w.document.close();
        w.focus();
      }

// -- Събития
      ['change','input'].forEach(evt=>{
        document.querySelectorAll('#win-calc select,#win-calc input')
          .forEach(el=>{ el.addEventListener(evt, calculate); el.setAttribute('autocomplete','off'); });
      });
      pdfBtn.addEventListener('click', exportPDF);

resetBtn.addEventListener('click',()=>{
        selectedModel=''; [...modelsWrap.children].forEach(x=>x.classList.remove('active'));
        formWrap.style.display='none'; modelPreview.style.display='none'; modelImg.src=''; modelCaption.textContent='';
        document.querySelectorAll('#win-calc select').forEach(s=>s.selectedIndex=0);
        document.querySelectorAll('#win-calc input[type="number"]').forEach(i=>i.value='');
        [gLowE,gFour,gArgon,uninstallOld,installNew,finishing,vatOn].forEach(c=>c.checked=false);
        applyEnabledVisibility();
        vatOn.checked=true; mosquitoQty.value='0'; distanceKm.value='0';
        breakdown.innerHTML=''; badges.innerHTML=''; totalBGN.textContent='—'; totalEUR.textContent='—';
        LAST=null;
      });

// -- Старт
      breakdown.innerHTML=''; totalBGN.textContent='—'; totalEUR.textContent='—';
    })();
  </script>
</div>