<!DOCTYPE html>

<html lang="de">

<head>

<meta charset="UTF-8">

<meta name="viewport" content="width=device-width, initial-scale=1.0">


<title>Portfolio</title>


<style>

body {

  margin: 0;

  background: #111;

  color: #fff;

  font-family: Arial, sans-serif;

  overflow: hidden;

}


#viewer {

  width: 100vw;

  height: 100vh;

}


.controls {

  position: fixed;

  bottom: 30px;

  width: 100%;

  display: flex;

  justify-content: center;

  gap: 20px;

}


button {

  background: transparent;

  border: 1px solid #fff;

  color: #fff;

  padding: 10px 15px;

  cursor: pointer;

}

</style>

</head>


<body>


<canvas id="viewer"></canvas>


<div class="controls">

  <button onclick="prevPage()">←</button>

  <button onclick="nextPage()">→</button>

</div>


<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>


<script>

let pdfDoc = null;

let pageNum = 1;

let canvas = document.getElementById('viewer');

let ctx = canvas.getContext('2d');


pdfjsLib.getDocument('portfolio.pdf').promise.then(pdf => {

  pdfDoc = pdf;

  renderPage(pageNum);

});


function renderPage(num) {

  pdfDoc.getPage(num).then(page => {

    let viewport = page.getViewport({ scale: 1.5 });

    canvas.width = viewport.width;

    canvas.height = viewport.height;


    page.render({

      canvasContext: ctx,

      viewport: viewport

    });

  });

}


function nextPage() {

  if (pageNum < pdfDoc.numPages) {

    pageNum++;

    renderPage(pageNum);

  }

}


function prevPage() {

  if (pageNum > 1) {

    pageNum--;

    renderPage(pageNum);

  }

}

</script>


</body>

</html>