<div class="container range__slant">


  <div class="paragraph">

    <div class="text">Variable Fonts</div>

  </div>
  <div id='demo-controls' class="controls">
    <!--   Weight   -->
    <div class="value-tag"></div>
    <div class="low-value"></div>
    <div class="slider range-width">
      <input type="range" name="range-weight" value="400" id="text-vf-wght" class="controls--weight" min="100" max="700"> 
      <label for="controls__weight">Weight</label>
    </div>
    <div class=" high-value"></div>
    <div class=" current-value"></div>
    
    <!--  Width    -->
    <div class="value-tag2"></div>
    <div class="low-value2"></div>
    <div class="slider range-width">
      <input type="range" name="range-width" value="95" id="text-vf-wdth" class="controls--width" min="85" max="100"> 
      <label for="controls__width">Width</label>
    </div>
    <div class="high-value2"></div>
    <div class="current-value2"></div>

    <!--  Slant    -->
    <div class="value-tag3"></div>
    <div class="low-value3"></div>
    <div class="slider range-slant">
      <input type="range" name="range-slant" value="9" id="text-vf-slnt" class="controls--slant" min="0" max="15"> 
      <label for="controls__slant">Slant</label>
    </div>
    <div class="high-value3"></div>
    <div class="current-value3"></div>
    
    <!--   Italic   -->
    <div class="value-tag4"></div>
    <div class="low-value4"></div>
    <div class="slider range-italic">
      <input type="range" name="range-italic" value="0" id="text-vf-ital" class="controls--slant" min="0" max="1"> 
      <label for="controls__slant">Italic</label>
    </div>
    <div class="high-value4"></div>
    <div class="current-value4"></div>
    
    <!--  Optical Size    -->
    <div class="value-tag5"></div>
    <div class="low-value5"></div>
    <div class="slider range-width">
      <input type="range" name="range-opsz" value="80" id="text-vf-opsz" class="controls--opsz" min="8" max="144"> <label for="controls__width">Optical Size</label>
    </div>
    <div class="high-value5"></div>
    <div class="current-value5"></div>
  </div>

</div>

@font-face {
  font-family: "Amstelvar VF";
  src: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/Amstelvar-Roman-VF_copy.woff2")
    format("woff2 supports variations"), url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/Amstelvar-Roman-VF_copy.woff2")
    format("woff2-variations");
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 75% 125%;
}

.range__slant {
  --text-vf-wght: 400;  
  --text-vf-wdth: 95;
  --text-vf-slnt: 9;
  --text-vf-ital: 0;
  --text-vf-opsz: 80;
  
  --value-tag: 'wght';
  --low-value: 100;
  --current-value: var(--text-vf-wght);
  --high-value: 700;
  
  --value-tag2: 'wdth';
  --low-value2: 85;
  --current-value2: var(--text-vf-wdth);
  --high-value2: 100;
  
  --value-tag3: 'slnt';
  --low-value3: 0;
  --current-value3: var(--text-vf-slnt);
  --high-value3: 15;
  
  --value-tag4: 'ital';
  --low-value4: 0;
  --current-value4: var(--text-vf-ital);
  --high-value4: 1;
  
  --value-tag5: 'opsz';
  --low-value5: 8;
  --current-value5: var(--text-vf-opsz);
  --high-value5: 144;

  .paragraph {
    background-color: #ffffff;
    margin-left: auto;
    margin-right: auto;
    max-width: 95vw;
    width: 45em;
    flex:1;
  }

  .paragraph .text {
    font-family: "Amstelvar VF", Helvetica, sans-serif;
    font-size: 5rem;
    // font-weight: var(--text-vf-wght);
    font-variation-settings:"wght" var(--text-vf-wght), "wdth" var(--text-vf-wdth), "slnt" calc( var(--text-vf-slnt) * -1), "ital" var(--text-vf-ital), "opsz" var(--text-vf-opsz), "MONO" 0, "CASL" 0;
    line-height: 7rem;
    margin: 0 auto 0 auto;
    text-align: center;
  }


  /* Control buttons */
  .controls {
    display: grid;
    grid-template-columns: min-content 1fr min-content;
    margin: 0 2em;
    text-align: center;
    width: 20rem;

    h3 {
      display: inline;
      font-weight: normal;
      font-family: monospace;
    }
    label {
      float: left;
      height: 1px;
      text-indent: -999em;
      visibility: hidden;
    }
    .slider {
      grid-column: 2/3;
      input {
        width: 100%;
      }
    }
    .value-tag {
      grid-column: span 3;
      font-weight: bold;
      margin-bottom: 0.5rem;
      text-align: left;
      &::before {
        counter-reset: tag var(--value-tag);
        content: "'" var(--value-tag) "' range";
        font-family: sans-serif;
      }
   }
    .low-value {
      grid-column: 1/2;
      text-align: left;
      width: 2.5rem;
      &::before {
        counter-reset: tag var(--low-value);
        content: counter(tag);
        font-family: sans-serif;
      }
    }
    .high-value{
      grid-column: 4/5;
      text-align: right;
      width: 2.5rem;
    &::before {
       counter-reset: tag var(--high-value);
       content: counter(tag);
       font-family: sans-serif;
      }
    }
    .current-value {
      grid-column: 2/3;
      &::before {
        counter-reset: tag var(--current-value);
        border: solid 1px black;
        content: counter(tag);
        display: inline-block;
        font-family: sans-serif;
        min-width: 3rem;
        margin: 0 auto;
        padding: 0.25rem 0.25rem 0.2rem 0.25rem;
      }
    }
    .value-tag2 {
      grid-column: span 3;
      font-weight: bold;
      margin-bottom: 0.5rem;
      text-align: left;
      &::before {
        counter-reset: tag var(--value-tag2);
        content: "'" var(--value-tag2) "' range";
        font-family: sans-serif;
      }
   }
    .low-value2 {
      grid-column: 1/2;
      text-align: left;
      width: 2.5rem;
      &::before {
        counter-reset: tag var(--low-value2);
        content: counter(tag);
        font-family: sans-serif;
      }
    }
    .high-value2 {
      grid-column: 4/5;
      text-align: right;
      width: 2.5rem;
    &::before {
       counter-reset: tag var(--high-value2);
       content: counter(tag);
       font-family: sans-serif;
      }
    }
    .current-value2 {
      grid-column: 2/3;
      &::before {
        counter-reset: tag var(--current-value2);
        border: solid 1px black;
        content: counter(tag);
        display: inline-block;
        font-family: sans-serif;
        min-width: 3rem;
        margin: 0 auto;
        padding: 0.25rem 0.25rem 0.2rem 0.25rem;
      }
    }
    
    .value-tag3 {
      grid-column: span 3;
      font-weight: bold;
      margin-bottom: 0.5rem;
      text-align: left;
      &::before {
        counter-reset: tag var(--value-tag3);
        content: "'" var(--value-tag3) "' range";
        font-family: sans-serif;
      }
   }
    .low-value3 {
      grid-column: 1/2;
      text-align: left;
      width: 2.5rem;
      &::before {
        counter-reset: tag var(--low-value3);
        content: counter(tag);
        font-family: sans-serif;
      }
    }
    .high-value3 {
      grid-column: 4/5;
      text-align: right;
      width: 2.5rem;
    &::before {
       counter-reset: tag var(--high-value3);
       content: counter(tag);
       font-family: sans-serif;
      }
    }
    .current-value3 {
      grid-column: 2/3;
      &::before {
        counter-reset: tag var(--current-value3);
        border: solid 1px black;
        content: counter(tag);
        display: inline-block;
        font-family: sans-serif;
        min-width: 3rem;
        margin: 0 auto;
        padding: 0.25rem 0.25rem 0.2rem 0.25rem;
      }
    }
    .value-tag4 {
      grid-column: span 3;
      font-weight: bold;
      margin-bottom: 0.5rem;
      text-align: left;
      &::before {
        counter-reset: tag var(--value-tag4);
        content: "'" var(--value-tag4) "' range";
        font-family: sans-serif;
      }
   }
    .low-value4 {
      grid-column: 1/2;
      text-align: left;
      width: 2.5rem;
      &::before {
        counter-reset: tag var(--low-value4);
        content: counter(tag);
        font-family: sans-serif;
      }
    }
    .high-value4 {
      grid-column: 4/5;
      text-align: right;
      width: 2.5rem;
    &::before {
       counter-reset: tag var(--high-value4);
       content: counter(tag);
       font-family: sans-serif;
      }
    }
    .current-value4 {
      grid-column: 2/3;
      &::before {
        counter-reset: tag var(--current-value4);
        border: solid 1px black;
        content: counter(tag);
        display: inline-block;
        font-family: sans-serif;
        min-width: 3rem;
        margin: 0 auto;
        padding: 0.25rem 0.25rem 0.2rem 0.25rem;
      }
    }
    .value-tag5 {
      grid-column: span 3;
      font-weight: bold;
      margin-bottom: 0.5rem;
      text-align: left;
      &::before {
        counter-reset: tag var(--value-tag5);
        content: "'" var(--value-tag5) "' range";
        font-family: sans-serif;
      }
   }
    .low-value5 {
      grid-column: 1/2;
      text-align: left;
      width: 2.5rem;
      &::before {
        counter-reset: tag var(--low-value5);
        content: counter(tag);
        font-family: sans-serif;
      }
    }
    .high-value5 {
      grid-column: 4/5;
      text-align: right;
      width: 2.5rem;
    &::before {
       counter-reset: tag var(--high-value5);
       content: counter(tag);
       font-family: sans-serif;
      }
    }
    .current-value5 {
      grid-column: 2/3;
      &::before {
        counter-reset: tag var(--current-value5);
        border: solid 1px black;
        content: counter(tag);
        display: inline-block;
        font-family: sans-serif;
        min-width: 3rem;
        margin: 0 auto;
        padding: 0.25rem 0.25rem 0.2rem 0.25rem;
      }
    }
  }
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
}
.container {
  display: flex;
  width: 100vw;
  align-items: center;
}

// get the inputs
const inputs = [].slice.call(document.querySelectorAll('.range__slant .controls input'));

// listen for changes
inputs.forEach(input => input.addEventListener('change', handleUpdate));
inputs.forEach(input => input.addEventListener('mousemove', handleUpdate));


function handleUpdate(e) {      document.querySelector('.range__slant').style.setProperty(`--${this.id}`, this.value);
}