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              <div class='example-box'>
  <div class='example static'>
    <h3>Static</h3>
    <div class='stats'>
    </div>
    <div class='body'></div>
  </div>
  <div class='example adaptive'>
    <h3>Adaptive</h3>
    <div class='stats'></div>
    <div class='body'></div>
  </div>
  <div class='example fluid'>
    <h3>Fluid</h3>
    <div class='stats'></div>
    <div class='body'></div>
  </div>
 </div>
            
          
!
            
              $serif: 'Crimson Text', serif;
$sans: 'Roboto', sans-serif;
$mono: 'Monaco', monospace;

$grey: #666;
$blue: #0655bd;
$red: #b14343;

$m-med: 800px;
$m-sml: 560px;
$m-mni: 375px;

@function st($n) { // strip units from a number
  @if type-of($n) == 'number' and not unitless($n) {
    @return $n / ($n * 0 + 1);
  }
  @else {
    @return $n;
  }
}

@function li($x0, $x1, $y0, $y1, $x) { // linear interpolation for fonts
  @return calc(0% + #{$y0} + (#{unquote($x)} - #{$x0}) * (#{st($y1 - $y0)} / #{st($x1 - $x0)}));
}

@function li2($x0, $x1, $y0, $y1, $x) { // linear interpolation for lengths
  @return calc(#{$y0} + (#{unquote($x)} - #{$x0}) * (#{st($y1 - $y0)} / #{st($x1 - $x0)}));
}

div.example-box {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-start;
  flex-shrink: 0;
  width: calc(100vw - 40px);
  max-width: 1400px;
  margin: 0 auto;
  @media (max-width: $m-sml) {
    flex-direction: column;
  }
  div.example {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    flex-basis: 0;
    flex: 1;
    margin: 20px 20px 20px 0;
    @media (max-width: $m-sml) {
      margin: 0 10px 20px 10px;
    }
    &:last-child {
      margin: 20px 0;
      @media (max-width: $m-sml) {
        margin: 0 10px;
      }
    }
    h3 {
      font-family: $sans;
      font-size: 18px;
      margin: 0 0 10px 0;
    }
    div.body {
      width: 100%;
      padding: 30px;
      margin: 0 0 5px 0;
      background-color: #eee;
      border-radius: 4px;
      box-shadow: inset 0px 1px 3px 0px rgba(0,0,0,0.2);
      box-sizing: border-box;
      font-family: $serif;
      line-height: 125%;
    }
    div.stats {
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
      align-items: center;
      width: 100%;
      padding: 0 30px;
      margin: 0 0 10px 0;
      box-sizing: border-box;
      @media (max-width: $m-med) {
        padding: 0 10px;
      }
      p.stat-line {
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        width: 80%;
        min-width: 100px;
        margin: 0 0 0 0;
        font-family: $mono;
        font-size: 12px;
        white-space: nowrap;
        position: relative;
        span.stat-val {

        }
        span.stat-unit {
          color: $grey;
          position: absolute;
          right: -20px;
        }
      }
    }
  }
}

div.example-box {
  div.example {
    div.body {
      font-size: 16px;
    }
    &.static {

    }
    &.adaptive {
      div.body {
        @media (max-width: 1060px) {
          font-size: 13.01px;
        }
        @media (max-width: 820px) {
          font-size: 9.14px;
        }
        @media (max-width: $m-sml) {
          font-size: 16px;
        }
        @media (max-width: 460px) {
          font-size: 12.36px;
        }
        @media (max-width: 375px) {
          font-size: 9.27px;
        }
      }
    }
    &.fluid {
      div.body {
        @media (max-width: 1438px) {
          font-size: li(0px,393px,0px,16px,'(((100vw - 80px) / 3) - 60px)');
        }
        @media (max-width: $m-sml) {
          font-size: li(0px,440px,0px,16px,'(((100vw - 60px) / 1) - 60px)');
        }
      }
    }
  }
}
            
          
!
            
              document.addEventListener('DOMContentLoaded', () => {

  // constants
  const text = 'But they could not blame her, for through her eyes now shone the sun, and her veins were as fire. She lifted her gaze to the stars and the stars gazed back, their gentle shimmers whispering words that were not words, her instruments seeming to come alive with their voices of heat and light. Her ship&#146;s grievous damage was nothing; now, no one could stop them.';
  const stats = [{
    name: 'width',
    unit: 'px',
  },{
    name: 'font size',
    unit: 'px',
  },{
    name: 'cpl',
    unit: '',
  }];
  const is_safari = !!navigator.userAgent.match(/Version\/[\d\.]+.*Safari/);

  // elements
  var EXPL = $('div.example');

  // listeners
  window.addEventListener('resize', window_resize);

  // stack
  let stat_block = '';
  stats.forEach((c) => {
    stat_block += cr('p', {
      class: 'stat-line',
      children: [
        c.name + ': ',
        cr('span', {
          class: 'stat-val',
        }),
        cr('span', {
          class: 'stat-unit',
          children: [
            c.unit,
          ],
        }),
      ],
    });
  })
  EXPL.forEach((c) => {
    $('div.body',c).innerHTML = text;
    $('div.stats',c).innerHTML = stat_block;
  });
  setTimeout(() => {
    window_resize();
  },100);

  // functions

  function $(t,s) {
    if (s === undefined) {
      s = document;
    }
    let y = Array.prototype.slice.call(s.querySelectorAll(t));
    if (y.length > 1) {
      return y;
    }
    else {
      return y[0];
    }
  }

  function css(x) {
    return window.getComputedStyle(x);
  }

  function cr(x,o) {
    let html = '';
    html += '<' + x;
    let k = [];
    Object.keys(o).forEach((c) => {
      if (c !== 'children') {
        html += ' ' + c + '="' + o[c] + '"';
      }
      else {
        k = o[c];
      }
    });
    html += '>';
    if (k.length > 0) {
      k.forEach((c) => {
        html += c;
      });
    }
    html += '</' + x + '>';
    return html;
  }

  function window_resize() {
    EXPL.forEach((c) => {
      const wdh = c.offsetWidth - 60;
      const fsz = parseFloat(css($('div.body',c))['font-size']);
      const cpl = wdh / fsz * 2.1;
      let P = $('div.stats p span.stat-val',c);
      P[0].innerHTML = wdh;
      P[1].innerHTML = fsz.toFixed(2);
      P[2].innerHTML = cpl.toFixed(2);
    });
    document.querySelector('div.example.fluid div.body').style.zIndex = 1;
    if (is_safari) {

    }
  }

});
            
          
!
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