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<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="description" content="Bilanz QuickCheck: Bilanzkennzahlen lokal im Browser berechnen und Geschäftsjahre vergleichen.">
<title>Bilanz QuickCheck</title>
<style>
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a{color:var(--cyan)}
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.panel h2{margin:0 0 5px;font-size:20px}
.sub{color:var(--muted);font-size:13px;margin-bottom:16px}
.year-label{
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.year-input{
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.sum-box small{display:block;color:var(--muted)}
.sum-box strong{font-size:18px}
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.results-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:12px}
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.metric-delta{font-size:12px;font-weight:800;min-height:18px}
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.explainer{margin-top:18px}
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details p{color:var(--muted);font-size:13px;margin:8px 0 0}
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}
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</style>
</head>
<body>
<div class="wrap">
  <section class="hero">
    <span class="badge">📊 Bilanz · Local-first Financial Tool</span>
    <h1>Bilanz QuickCheck</h1>
    <p>Zentrale Bilanzkennzahlen berechnen, zwei Geschäftsjahre vergleichen und die Finanzstruktur übersichtlich darstellen – direkt im Browser.</p>
    <div class="hero-actions">
      <button class="primary" onclick="loadDemo()">Beispieldaten laden</button>
      <button class="secondary" onclick="window.print()">Bericht drucken / PDF</button>
      <button class="ghost" onclick="resetAll()">Zurücksetzen</button>
    </div>
    <div class="privacy">
      <div>🔒</div>
      <div><strong>Private by design:</strong> Alle Werte werden ausschließlich in deinem Browser verarbeitet. Dieser Static Space überträgt oder speichert keine eingegebenen Finanzdaten.</div>
    </div>
  </section>

  <div class="grid input-area">
    <section class="panel">
      <div class="year-label">
        <div>
          <h2>Aktuelles Jahr</h2>
          <div class="sub">Pflichtangaben für die Kennzahlen</div>
        </div>
        <input class="year-input" id="year0" type="number" value="2025" min="1900" max="2200" aria-label="Aktuelles Geschäftsjahr">
      </div>
      <div id="fields0"></div>
      <div id="summary0"></div>
    </section>

    <section class="panel">
      <div class="year-label">
        <div>
          <h2>Vorjahr <span style="color:var(--muted);font-weight:500">(optional)</span></h2>
          <div class="sub">Für Veränderungsanalyse</div>
        </div>
        <input class="year-input" id="year1" type="number" value="2024" min="1900" max="2200" aria-label="Vorjahr">
      </div>
      <div id="fields1"></div>
      <div id="summary1"></div>
    </section>
  </div>

  <section class="panel results">
    <div class="results-head">
      <div>
        <h2>Kennzahlen</h2>
        <p>Rechnerische Orientierung – keine fachliche Unternehmensbewertung.</p>
      </div>
    </div>
    <div class="metrics" id="metrics"></div>
  </section>

  <div class="visuals">
    <section class="panel">
      <h2>Vermögensstruktur</h2>
      <div class="sub">Zusammensetzung der Aktivseite im aktuellen Jahr</div>
      <div class="stack" id="assetsStack"></div>
      <div class="legend" id="assetsLegend"></div>
    </section>

    <section class="panel">
      <h2>Finanzierungsstruktur</h2>
      <div class="sub">Zusammensetzung der Passivseite im aktuellen Jahr</div>
      <div class="stack" id="liabStack"></div>
      <div class="legend" id="liabLegend"></div>
    </section>
  </div>

  <section class="panel explainer">
    <h2>Kennzahlen verstehen</h2>
    <div class="sub">Formeln und neutrale Einordnung</div>
    <details open>
      <summary>Eigenkapitalquote</summary>
      <p>Eigenkapital ÷ Bilanzsumme × 100. Sie beschreibt den Anteil des Vermögens, der rechnerisch durch Eigenkapital finanziert ist. Branchen und Geschäftsmodelle unterscheiden sich stark.</p>
    </details>
    <details>
      <summary>Verschuldungsgrad</summary>
      <p>Fremdkapital ÷ Eigenkapital × 100. Die Kennzahl stellt Fremd- und Eigenfinanzierung gegenüber. Bei sehr geringem oder negativem Eigenkapital verliert die Kennzahl an Aussagekraft.</p>
    </details>
    <details>
      <summary>Working Capital</summary>
      <p>Umlaufvermögen minus kurzfristige Verbindlichkeiten. Es zeigt den rechnerischen Überschuss beziehungsweise Fehlbetrag kurzfristig gebundener Vermögenswerte gegenüber kurzfristigen Verpflichtungen.</p>
    </details>
    <details>
      <summary>Liquidität 1., 2. und 3. Grades</summary>
      <p>Vergleichen liquide Mittel, liquide Mittel plus Forderungen beziehungsweise das gesamte Umlaufvermögen mit kurzfristigen Verbindlichkeiten. Die Aussage hängt unter anderem von Zahlungszielen, Forderungsqualität und Vorratsstruktur ab.</p>
    </details>
    <details>
      <summary>Anlagendeckung I und II</summary>
      <p>Vergleichen Anlagevermögen mit langfristig verfügbarem Kapital. Anlagendeckung I verwendet Eigenkapital, Anlagendeckung II zusätzlich langfristige Verbindlichkeiten.</p>
    </details>
  </section>

  <div class="notice">
    <strong>Wichtiger Hinweis:</strong> Bilanz QuickCheck ist ein technisches Analyse- und Lernwerkzeug. Es ersetzt keine Steuerberatung, Rechtsberatung, Wirtschaftsprüfung, Kreditentscheidung oder Unternehmensbewertung. Kennzahlen sind ohne Branchen-, Zeitreihen- und Unternehmenskontext nicht abschließend interpretierbar.
  </div>

  <footer>Bilanz · Independent Hugging Face Community Project</footer>
</div>

<script>
const fieldDefs = [
  {group:"Aktiva", key:"fixed", label:"Anlagevermögen"},
  {group:"Aktiva", key:"inventory", label:"Vorräte"},
  {group:"Aktiva", key:"receivables", label:"Forderungen"},
  {group:"Aktiva", key:"cash", label:"Liquide Mittel"},
  {group:"Aktiva", key:"otherCurrent", label:"Sonstiges Umlaufvermögen"},
  {group:"Passiva", key:"equity", label:"Eigenkapital"},
  {group:"Passiva", key:"longDebt", label:"Langfristige Verbindlichkeiten"},
  {group:"Passiva", key:"shortDebt", label:"Kurzfristige Verbindlichkeiten"},
  {group:"Passiva", key:"provisions", label:"Rückstellungen"},
  {group:"Passiva", key:"otherLiab", label:"Sonstige Passiva"}
];

function euro(n){
  if(!Number.isFinite(n)) return "–";
  return new Intl.NumberFormat("de-DE",{style:"currency",currency:"EUR",maximumFractionDigits:0}).format(n);
}
function pct(n){
  if(!Number.isFinite(n)) return "–";
  return new Intl.NumberFormat("de-DE",{maximumFractionDigits:1,minimumFractionDigits:1}).format(n)+" %";
}
function num(id){
  const v=parseFloat(document.getElementById(id)?.value);
  return Number.isFinite(v)?v:0;
}
function safeDiv(a,b){ return b!==0 ? a/b : NaN; }

function renderFields(yearIndex){
  let html="", lastGroup="";
  for(const f of fieldDefs){
    if(f.group!==lastGroup){
      html+=`<div class="section-title">${f.group}</div><div class="field-grid">`;
      lastGroup=f.group;
    }
    html+=`<label for="${f.key}${yearIndex}">${f.label}</label>
           <input id="${f.key}${yearIndex}" data-y="${yearIndex}" type="number" min="0" step="1000" placeholder="0" inputmode="decimal">`;
    const next=fieldDefs[fieldDefs.indexOf(f)+1];
    if(!next || next.group!==f.group) html+="</div>";
  }
  document.getElementById("fields"+yearIndex).innerHTML=html;
}

function getYear(i){
  const x={};
  fieldDefs.forEach(f=>x[f.key]=num(f.key+i));
  x.current=x.inventory+x.receivables+x.cash+x.otherCurrent;
  x.assets=x.fixed+x.current;
  x.debt=x.longDebt+x.shortDebt+x.provisions+x.otherLiab;
  x.liabilities=x.equity+x.debt;
  x.diff=x.assets-x.liabilities;
  return x;
}

function metricsFor(x){
  return {
    equityRatio: safeDiv(x.equity,x.assets)*100,
    debtRatio: safeDiv(x.debt,x.liabilities)*100,
    debtEquity: safeDiv(x.debt,x.equity)*100,
    workingCapital: x.current-x.shortDebt,
    cashRatio: safeDiv(x.cash,x.shortDebt)*100,
    quickRatio: safeDiv(x.cash+x.receivables,x.shortDebt)*100,
    currentRatio: safeDiv(x.current,x.shortDebt)*100,
    cover1: safeDiv(x.equity,x.fixed)*100,
    cover2: safeDiv(x.equity+x.longDebt,x.fixed)*100,
    fixedIntensity: safeDiv(x.fixed,x.assets)*100,
    cashShare: safeDiv(x.cash,x.assets)*100
  };
}

const metricDefs = [
  ["equityRatio","Eigenkapitalquote","pct","Eigenkapital ÷ Bilanzsumme"],
  ["debtRatio","Fremdkapitalquote","pct","Fremdkapital ÷ Passivsumme"],
  ["debtEquity","Verschuldungsgrad","pct","Fremdkapital ÷ Eigenkapital"],
  ["workingCapital","Working Capital","eur","Umlaufvermögen − kurzfr. Verbindlichkeiten"],
  ["cashRatio","Liquidität 1. Grades","pct","Liquide Mittel ÷ kurzfr. Verbindlichkeiten"],
  ["quickRatio","Liquidität 2. Grades","pct","Liquide Mittel + Forderungen ÷ kurzfr. Verbindlichkeiten"],
  ["currentRatio","Liquidität 3. Grades","pct","Umlaufvermögen ÷ kurzfr. Verbindlichkeiten"],
  ["cover1","Anlagendeckung I","pct","Eigenkapital ÷ Anlagevermögen"],
  ["cover2","Anlagendeckung II","pct","EK + langfristige Verbindlichkeiten ÷ Anlagevermögen"],
  ["fixedIntensity","Anlagenintensität","pct","Anlagevermögen ÷ Bilanzsumme"],
  ["cashShare","Anteil liquide Mittel","pct","Liquide Mittel ÷ Bilanzsumme"]
];

function hasPrior(){
  return fieldDefs.some(f=>num(f.key+"1")!==0);
}

function renderSummary(i,x){
  const tolerance=Math.max(x.assets,x.liabilities,1)*0.001;
  const balanced=Math.abs(x.diff)<=tolerance;
  document.getElementById("summary"+i).innerHTML=`
    <div class="summary-row">
      <div class="sum-box"><small>Summe Aktiva</small><strong>${euro(x.assets)}</strong></div>
      <div class="sum-box"><small>Summe Passiva</small><strong>${euro(x.liabilities)}</strong></div>
    </div>
    <div class="balance-message" style="border-color:${balanced?'rgba(85,217,139,.28)':'rgba(255,123,123,.35)'}">
      ${balanced?'✓ Aktiv- und Passivsumme stimmen rechnerisch überein.':'⚠ Bilanzdifferenz: '+euro(x.diff)+'. Eingaben prüfen.'}
    </div>`;
}

function deltaText(a,b,type){
  if(!Number.isFinite(a)||!Number.isFinite(b)) return ["","flat"];
  const d=a-b;
  const threshold=type==="eur" ? 0.5 : 0.05;
  if(Math.abs(d)<threshold) return ["Keine Veränderung","flat"];
  const value=type==="eur"?euro(Math.abs(d)):pct(Math.abs(d));
  return [(d>0?"▲ ":"▼ ")+value+" ggü. Vorjahr",d>0?"up":"down"];
}

function renderMetrics(m0,m1){
  const prior=hasPrior();
  document.getElementById("metrics").innerHTML=metricDefs.map(([k,name,type,info])=>{
    const val=type==="eur"?euro(m0[k]):pct(m0[k]);
    let d=["","flat"];
    if(prior) d=deltaText(m0[k],m1[k],type);
    return `<div class="metric">
      <div class="metric-name">${name}</div>
      <div class="metric-value">${val}</div>
      <div class="metric-delta ${d[1]}">${d[0]}</div>
      <div class="metric-info">${info}</div>
    </div>`;
  }).join("");
}

function stack(el, legendEl, items){
  const total=items.reduce((s,x)=>s+x.value,0);
  document.getElementById(el).innerHTML=items.map((x,i)=>{
    const w=total?Math.max(0,x.value/total*100):0;
    return `<div class="seg s${i+1}" style="width:${w}%" title="${x.name}: ${pct(w)}"></div>`;
  }).join("");
  document.getElementById(legendEl).innerHTML=items.map((x,i)=>{
    const w=total?x.value/total*100:0;
    return `<span><i class="dot s${i+1}"></i>${x.name} ${pct(w)}</span>`;
  }).join("");
}

function update(){
  const y0=getYear(0), y1=getYear(1);
  renderSummary(0,y0); renderSummary(1,y1);
  renderMetrics(metricsFor(y0),metricsFor(y1));
  stack("assetsStack","assetsLegend",[
    {name:"Anlagevermögen",value:y0.fixed},
    {name:"Vorräte",value:y0.inventory},
    {name:"Forderungen",value:y0.receivables},
    {name:"Liquide Mittel",value:y0.cash},
    {name:"Sonst. UV",value:y0.otherCurrent}
  ]);
  stack("liabStack","liabLegend",[
    {name:"Eigenkapital",value:y0.equity},
    {name:"Langfr. Verb.",value:y0.longDebt},
    {name:"Kurzfr. Verb.",value:y0.shortDebt},
    {name:"Rückstellungen",value:y0.provisions},
    {name:"Sonst. Passiva",value:y0.otherLiab}
  ]);
}

function setVals(i, vals){
  for(const [k,v] of Object.entries(vals)){
    const e=document.getElementById(k+i);
    if(e) e.value=v;
  }
}
function loadDemo(){
  setVals(0,{
    fixed:4800000,inventory:950000,receivables:1750000,cash:1200000,otherCurrent:300000,
    equity:3600000,longDebt:2450000,shortDebt:1950000,provisions:700000,otherLiab:300000
  });
  setVals(1,{
    fixed:4550000,inventory:900000,receivables:1600000,cash:950000,otherCurrent:250000,
    equity:3250000,longDebt:2400000,shortDebt:1850000,provisions:550000,otherLiab:200000
  });
  document.getElementById("year0").value=2025;
  document.getElementById("year1").value=2024;
  update();
}
function resetAll(){
  fieldDefs.forEach(f=>{document.getElementById(f.key+"0").value="";document.getElementById(f.key+"1").value=""});
  update();
}

renderFields(0);
renderFields(1);
document.addEventListener("input",e=>{
  if(e.target.matches('input[type="number"]')) update();
});
update();
</script>
</body>
</html>