Big CartoDB infowindow with only CSS

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
    
    <style>
      html, body, #map {
        height: 100%;
        padding: 0;
        margin: 0;
      }
      .infowindow-custom{ 
        position: relative;
        width: 350px;
        background-color: white;
        margin-bottom: 11px;

}

.cartodb-popup-close-button {
        position: absolute;
        top: -12px;
        right: -11px;
        width: 26px;
        height: 26px;
        background: url('https://libs.cartodb.com/cartodb.js/v3/themes/img/light.png') no-repeat 0 -23px;
        text-indent: -9999px;
        font-size: 0;
        line-height: 0;
        opacity: 1;
        text-transform: uppercase;
        z-index: 3;
      }

.cartodb-popup-tip-container {
        position: absolute;
        bottom: -3px;
        left: 23px;
        width: 16px;
        height: 14px;
        background: url('https://libs.cartodb.com/cartodb.js/v3/themes/img/light.png') no-repeat -23px -7px;
        text-indent: -9999px;
        font-size: 0;
        line-height: 0;
        opacity: 1;
        z-index: 3;
      }

blockquote {
        display: hidden;
      }

.cartodb-popup-content {
        min-height: 80px;
      }
    </style>

</head>
    
  <body>
    <div id="map"></div>
  </body>

</script>
    <script src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
    <script src="https://libs.cartocdn.com/cartodb.js/v3/3.0.05-dev/cartodb.js"></script>
  <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

function main() {
        var map = L.map('map', { 
          zoomControl: false,
          center: [0, 0],
          zoom: 3
        });

// add a nice baselayer from Stamen 
        L.tileLayer('https://{s}.tile.stamen.com/toner/{z}/{x}/{y}.png', {
          attribution: 'Stamen'
        }).addTo(map);

cartodb.createLayer(map, 'https://documentation.cartodb.com/api/v2/viz/2b13c956-e7c1-11e2-806b-5404a6a683d5/viz.json')
         .addTo(map)
         .on('done', function(layer) {
           // get sublayer 0 and set the infowindow template
           var sublayer = layer.getSubLayer(0);

sublayer.infowindow.set('template', $('#infowindow_template').html());
          }).on('error', function() {
            console.log("some error occurred");
          });

}

window.onload = main;

</script>

</html>

Modified http://libs.cartocdn.com/cartodb.js/v3/3.0.05-dev/cartodb.js to a secure url

Modified http://platform.twitter.com/widgets.js to a secure url

https://maps.googleapis.com/maps/api/js?sensor=false

https://libs.cartocdn.com/cartodb.js/v3/3.0.05-dev/cartodb.js

https://platform.twitter.com/widgets.js