Làm cách nào để sắp xếp theo chiều dọc tất cả văn bản trong CSS?

.avatar {
    border-radius: 50%;
    display: inline-block;
    text-align: center;
    width: 125px;
    height: 125px;
    font-size: 60px;
    background-color: rgb(81, 75, 93);
    font-family: "Segoe UI";
    margin-bottom: 10px;
}

.character {
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    line-height: 100%;
    color: #fff;
}

<div class="avatar">
  <div class="character">W</div>
</div>

<div class="avatar">
  <div class="character">y</div>
</div>

var elems = document.querySelectorAll(".avatar");
var k = 0;

for (var i = 0; i < elems.length; i++) {
  domtoimage.toPixelData(elems[i])
    .then(function(im) {
     var l = im.length;
      /* Search for the top limit */
      var t = 0;
      for (var j = 0; j < l; j+=4) {
          if (im[j+1] == 255) { /* Since we know the colors, we can only test the G composant */
            t = Math.ceil((j/4)/125);
            break;
          }
      }
      /* Search the bottom limit*/
      var b = 0;
      for (var j = l - 1; j >= 0; j-=4) {
          if (im[j+1] == 255) {
            b = 125 - Math.ceil((j/4)/125);
            break;
          }
      }
      /* get the difference and apply a translation*/
      elems[k].querySelector('.character').style.transform = "translateY(" + (b - t)/2 + "px)";
      k++;
    });
}

.avatar {
  border-radius: 50%;
  display: inline-flex;
  vertical-align:top;
  justify-content: center;
  align-items: center;
  width: 125px;
  height: 125px;
  font-size: 60px;
  background: 
    linear-gradient(red,red) center/100% 1px no-repeat,
    rgb(81, 75, 93);
  font-family: "Segoe UI";
  margin-bottom: 10px;
}

.character {
  color: #fff;
}

<script type="text/javascript" src="https://css-challenges.com/wp-content/themes/ronneby_child/js/dom-to-image.js"></script>
<div class="avatar">
  <div class="character">W</div>
</div>

<div class="avatar">
  <div class="character">y</div>
</div>

<div class="avatar">
  <div class="character" style="font-size:35px">a</div>
</div>

<div class="avatar">
  <div class="character" style="font-size:25px">2</div>
</div>
<div class="avatar">
  <div class="character">o</div>
</div>
<div class="avatar">
  <div class="character">|</div>
</div>
<div class="avatar">
  <div class="character">@</div>
</div>
<div class="avatar">
  <div class="character">Â</div>
</div>

<div class="avatar">
  <div class="character" style="font-family:arial">Q</div>
</div>
<div class="avatar">
  <div class="character">~</div>
</div>
<div class="avatar">
  <div class="character">8</div>
</div>

<div class="avatar">
  <div class="character">ä</div>
</div>
<div class="avatar">
  <div class="character">ç</div>
</div>

<div class="avatar">
  <div class="character">$</div>
</div>

<div class="avatar">
  <div class="character">></div>
</div>
<div class="avatar">
  <div class="character">%</div>
</div>

const letters = ['a', 'b', 'y', 'X', 'c', 'y', 'A', 'B', 'Y']; 

function getAdditionalClass(char){
    //To do - fill arrays with the rest of the appropriate letters
    if (['y', 'g'].includes(char)) {
        return "tail"; 
    }
    if (['b', 'd'].includes(char)) {
        return "stalk"; 
    }
    
    if (['a', 'c'].includes(char)) {
        return "small"; 
    }
    
    return "capital"; 
}

letters.forEach(v => {
  const avatar = document.createElement("div"); 
  avatar.className = "avatar"; 
  const character = document.createElement("div");
  character.textContent = v; 
  character.className = `character ${getAdditionalClass(v)}`; 
  
  avatar.appendChild(character); 
  
  const root = document.getElementById("root"); 
  
  root.appendChild(avatar); 
  
});

.avatar {
    border-radius: 50%;
    display: block;
    text-align: center;
    width: 125px;
    height: 125px;
    font-size: 60px;
    background-color: rgb(81, 75, 93);
    font-family: "Segoe UI";
    margin-bottom: 10px;
}

.character {
    position: relative;
    transform: translateY(-50%);
    line-height: 100%;
    color: #fff;
}


.small {
    top: 45%; 
}

.stalk {
    top: 50%;
}

.tail {
    top: 41%;
}

.capital {
    top: 50%;
}

#root {
    display: flex; 
    flex-flow: row wrap; 
}

<div id = "root">

</div>

var circles = document.getElementsByClassName('circle');
var tails = ['q', 'y', 'p', 'g', 'j'] ;

Array.from(circles).forEach(render);
  
function render(element) { 		
    if(element.innerText == element.innerText.toLowerCase() &&
    	tails.includes(element.innerText)) {
    	element.className += " scale";
    }
}

.circle {
  height: 150px;
  width: 150px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  text-align: center;
  vertical-align: middle;
  line-height: 150px;
  font-size: 50px;
}

.scale {
  line-height: 135px;
}

<div>
  <div class="circle">W</div>
  <div class="circle">X</div>
</div>
<div>
  <div class="circle">y</div>
  <div class="circle">t</div>
</div>

.avatar {
    border-radius: 50%;
    display: block;
    text-align: center;
    width: 125px;
    height: 125px;
    font-size: 60px;
    background-color: rgb(81, 75, 93);
    font-family: "Segoe UI";
    margin-bottom: 10px;
}

.character {
    position: relative;
    top: 50%;
    line-height: 100%;
    color: #fff;
}
.character-lowercase {
  transform: translateY(-60%);
}
.character-capital {
  transform: translateY(-50%);
}

<div class="avatar">
  <div class="character character-capital">W</div>
</div>

<div class="avatar">
  <div class="character character-lowercase">y</div>
</div>