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HTML 

              
                <html lang="ja">

<head>
  <link href="https://fonts.googleapis.com/css?family=M+PLUS+1p:400,900&display=swap" rel="stylesheet" />
</head>

<body>
  <header>
    <ul>
      <li class="ui-input"><label for="input-upper">上段:</label>
        <input id="input-upper" type="text" value="5000兆円" /></li>
      <li class="ui-input"><label for="input-lower">下段:</label>
        <input id="input-lower" type="text" value="欲しい！" /></li>
    </ul>
    <div>
      <small>ロゴを直接クリックすることで編集も可能です</small>
    </div>
  </header>
  <main class="preview" spellcheck="false">
    <p id="logo-upper" class="go-sen-chou-yen" data-text="5000兆円">
      <span id="content-upper" class="logo" data-text="5000兆円" contenteditable>5000兆円</span>
    </p>
    <p id="logo-lower" class="hoshii" data-text="欲しい！">
      <span id="content-lower" class="logo" data-text="欲しい！" contenteditable>欲しい！</span>
    </p>
  </main>
  <footer>
    <ul>
      <li>Original: <a href="//www.pixiv.net/member_illust.php?mode=medium&illust_id=62495210" target="top" rel="noopener noreferrer">5000兆円欲しい！ | ケースワベ【金-東M04b】</a></li>
      <li><a href="//twitter.com/mattn_jp/status/887208062578171904" target="top" rel="noopener">発端のツイート</a></li>
    </ul>
  </footer>
</body>
!

CSS 

              
                @charset "UTF-8";

/* フォームを含めた全体のスタイリング */
/* ======================================== */

/* 全体設定とプロパティ定数 */
:root {
  font-family: "M PLUS 1p", sans-serif;
  line-height: 1.5;
}

html, body, div, p, ul {
  padding: 0;
  margin: 0;
}

header, footer {
  display: block;
  color: #333;
  background: #EEE;
  padding: 8px;
}

header {
  border-bottom: 1px solid #DDD;
}

footer {
  border-top: 1px solid #DDD;
}

li.ui-input {
  list-style: none;
}

small:before {
  content: "※";
}

[contenteditable]:focus {
  outline: none;
  caret-color: #000;
}

.preview {
  display: inline-flex;
  flex-direction: column;
  transform: skewX(-25deg);
  margin: 8px;
}

/* ５０００兆円欲しい */
/* ======================================== */

/* フォント指定 */
/* ---------------------------------------- */
.go-sen-chou-yen, .hoshii {
  font-size: 96px;
  font-weight: 900;
  font-variant-east-asian: proportional-width;
  -moz-font-feature-settings: "palt";
  -webkit-font-feature-settings: "palt";
  font-feature-settings: "palt";
  line-height: 1.2;
}

.go-sen-chou-yen {
  font-family: "M PLUS 1p", sans-serif;
  letter-spacing: 0.05em;
}

.hoshii {
  font-family: "游明朝", YuMincho, "ヒラギノ明朝 ProN W3", "Hiragino Mincho ProN", "HG明朝E", "ＭＳ Ｐ明朝", "ＭＳ 明朝", serif;
  letter-spacing: 0.05em;
}

/* 共通プロパティ */
/* ---------------------------------------- */
.go-sen-chou-yen, .hoshii, .logo {
  position: relative;
}

/* z-index */
/* ---------------------------------------- */
.go-sen-chou-yen:after,
.hoshii:after {
  z-index: 2;
}

.go-sen-chou-yen, .hoshii {
  z-index: 1;
}

.logo:after {
  z-index: -1;
}

.logo:before {
  z-index: -2;
}

.go-sen-chou-yen:before,
.hoshii:before {
  z-index: -3;
}

.go-sen-chou-yen:before,
.go-sen-chou-yen:after,
.hoshii:before,
.hoshii:after,
.logo,
.logo:before,
.logo:after {
  display: inline-block;
  color: transparent;
  -webkit-background-clip: text;
  background-position: 0 0;
  background-size: 100% calc(1em * 1.2);
}

[data-text]:before,
[data-text]:after {
  content: attr(data-text) "";
  position: absolute;
  top: 0;
}

.go-sen-chou-yen:before,
.go-sen-chou-yen:after,
.go-sen-chou-yen > .logo:before,
.go-sen-chou-yen > .logo:after {
  left: 0;
}

.hoshii:before,
.hoshii:after,
.hoshii > .logo:before,
.hoshii > .logo:after {
  right: 0;
}

/* レイアウト */
/* ---------------------------------------- */
/* ※ 本来はmarginやpadding, width, height等のプロパティは単独のセレクタに付与せず、親のセレクタ次第で調整できるようにした方が望ましい。単体ではコンテナ側のレイアウトロジックに委ねる方式が柔軟。例：grid-gap, justify-content, flex-grow/flex-shrink ※ */

.go-sen-chou-yen:before,
.go-sen-chou-yen:after,
.hoshii:before,
.hoshii:after,
.logo,
.logo:before,
.logo:after {
  paddinf-top: 0.125em;
  padding-left: 0.125em;
  padding-right: 0.125em;
  padding-bottom: 0.25em;
}

/* 「欲しい！」はロゴの右下にアラインがあるように配置　*/
.hoshii {
  margin-top: -0.125em;
  margin-left: 2.5em;
  text-align: right;
}

/* プレート側面の金属光沢をグラデーションで再現 */
.logo:before {
  -webkit-text-stroke-width: 16px;
  transform: translate(10px, 10px);
  color: transparent;
  -webkit-background-clip: text;
  background-image:
    linear-gradient(
      90deg,
      #876 0%,
      #123 30%,
      #456 40%,
      #DEF 50%,
      #123 70%,
      #345 90%,
      #876 100%
    );
  background-size: 0.5em 1.5em;
  background-repeart: repeat;
  filter:
    drop-shadow(0px 0px 1px #000)
    blur(1px)
    ;
  mix-blend-mode: hard-light;
}

.go-sen-chou-yen > .logo {
  background-image:
    linear-gradient(
      #E00 20%,
      #600 50%,
      #F00 50%,
      #600 65%,
      #000 80%
    );
}

/* 金色に輝く ５０００兆円のベベル */
.go-sen-chou-yen > .logo:after {
  -webkit-text-stroke-width: 12px;
  background-image:
    linear-gradient(
      #FFF 35%,
      #FF0 49%,
      #FC0 50%,
      #930 55%,
      #300 65%,
      #960 70%,
      #F90 75%,
      #FF6 80%
    ); 
  text-shadow:
    /* ベベル（光沢） */
    #FFF -4px -4px 0px,
    #FFF -4px -4px 2px,
    /* ベベル（暗） */
    #300 -2px -2px 4px,
    #C00 -1px -1px 2px,
    #300 -1px -2px 1px,
    #300 -2px -2px 1px,
    /* 縁取り（白） */
    #FFF  1px -4px 1px,
    #FFF  1px -3px 1px,
    #FFF  1px -2px 1px,
    #FFF  1px -1px 1px,
    #FFF  1px  0px 1px,
    #FFF  1px  1px 1px,
    #FFF  0px  0px 1px,
    #FFF -1px  0px 1px,
    #FFF -4px  0px 1px,
    #FFF -4px -1px 1px,
    #FFF -4px -2px 1px,
    #FFF -4px -3px 1px,
    /* 縁取り（茶）*/
    #300  2px -3px 1px,
    #300  2px -2px 1px,
    #300  2px -1px 1px,
    #300  2px  0px 1px,
    #300  2px  1px 1px,
    #300  1px  1px 1px,
    #300  0px  0px 1px,
    #300 -1px  1px 1px,
    #300 -1px  0px 1px,
    #300 -1px -1px 1px,
    #300 -1px -2px 1px
    ;
  filter:
    drop-shadow( 0px  0px 1px #F00)
    drop-shadow(-1px -1px 1px #FFF)
    drop-shadow( 2px  2px 1px #300)
    ;
  transform: translate(2px, 2px);
}

.hoshii > .logo {
  background-image:
    linear-gradient(
      #DEE,
      #FFF 30%,
      #BCC 50%,
      #CDD 50%,
      #FFF 80%
    );
}

/* 瑞々しく輝く「欲しさ」を放つベベル */
.hoshii > .logo:after {
  -webkit-text-stroke-width: 10px;
  background-image:
    linear-gradient(
      #ABC,
      #FFF 30%,
      #456 60%,
      #FFF 80%
    );
  text-shadow:
    #FFF -3px -2px 0px,
    #FFF -3px -2px 1px,
    
    #39C -2px -1px 2px,
    
    #9BC  1px  1px 2px,
    #ABC  1px -1px 2px,
    /* 縁取り */
    #256 -2px -2px 1px,
    #256 -2px  2px 1px,
    #256  2px -2px 1px,
    #256  2px  2px 1px
    ;
  filter:
    drop-shadow( 0px  0px 1px #069)
    drop-shadow(-1px -1px 1px #FFF)
    drop-shadow( 2px  2px 1px #333)
    ;
  transform: translate(1px, 1px);
}

.go-sen-chou-yen:before,
.hoshii:before {
  text-shadow:
    /* ベベル右上の光沢 */
    #FFF  0px  0px 0px,
    /* 側面の光沢(暗) */
    #ABC  0px  0px 8px,
    #ABC  4px  4px 8px,
    #ABC  8px  8px 8px,
    #ABC 12px 12px 8px,
    /* 側面の光沢(明) */
    #FFF  0px  6px 1px,
    #FFF  0px  7px 1px,
    #FFF  0px  8px 1px,
    #FFF  1px  9px 1px,
    #FFF  1px 10px 1px,
    #FFF  2px 11px 1px,
    #FFF  2px 12px 1px,
    #FFF  3px 13px 1px,
    #FFF  3px 14px 1px,
    #FFF  4px 15px 1px,
    #FFF  4px 16px 1px,
    #FFF  5px 17px 1px,
    #FFF  6px 18px 1px,
    #FFF  7px 17px 1px,
    #FFF  8px 16px 1px,
    #FFF  8px 15px 1px,
    #FFF  8px 14px 1px,
    #FFF  8px 13px 1px,
    #FFF  8px 12px 1px,
    #FFF  8px 11px 1px,
    #FFF  8px 10px 1px,
    #FFF  8px 9px 1px,
    #FFF  8px 8px 1px,
    #FFF  8px 7px 1px,
    #FFF  8px 6px 1px,
    /*　上端　*/
    #222 -7px -4px 2px,
    #222 -6px -4px 2px,
    #222 -5px -4px 2px,
    #222 -4px -4px 2px,
    #222 -3px -4px 2px,
    #222 -2px -4px 2px,
    #222 -1px -4px 2px,
    #222  0px -4px 2px,
    #222  1px -5px 2px,
    #222  2px -5px 2px,
    #222  3px -5px 2px,
    #222  4px -5px 2px,
    #222  5px -5px 2px,
    #222  6px -5px 2px,
    #222  7px -5px 2px,
    #222  8px -5px 2px,
    #222  9px -5px 2px,
    /* 右端 */
    #012 10px -4px 2px,
    #012 10px -3px 2px,
    #012 11px -2px 2px,
    #012 11px -1px 2px,
    #012 12px  0px 2px,
    #012 12px  1px 2px,
    #012 13px  2px 2px,
    #012 13px  3px 2px,
    #012 14px  4px 2px,
    #012 14px  5px 2px,
    #012 15px  6px 2px,
    #012 15px  7px 2px,
    #012 16px  8px 2px,
    #012 15px  9px 2px,
    #012 14px 10px 2px,
    #012 13px 11px 2px,
    #012 12px 12px 2px,
    #012 11px 13px 2px,
    #012 10px 14px 2px,
    #012  9px 15px 2px,
    #012  8px 16px 2px,
    /* 左端 */
    #123 -7px -2px 2px,
    #123 -7px -1px 2px,
    #123 -7px  0px 2px,
    #123 -7px  1px 2px,
    #123 -6px  2px 2px,
    #123 -6px  3px 2px,
    #123 -6px  4px 2px,
    #123 -5px  5px 2px,
    #123 -5px  6px 2px,
    #123 -4px  7px 2px,
    #123 -4px  8px 2px,
    #123 -3px  9px 2px,
    #123 -3px 10px 2px,
    #123 -2px 11px 2px,
    #123 -2px 12px 2px,
    #123 -1px 13px 2px,
    #123 -1px 14px 2px,
    #123  0px 15px 2px,
    #123  0px 16px 2px,
    /*　下端　*/
    #123  1px 17px 2px,
    #123  2px 17px 2px,
    #123  3px 18px 2px,
    #123  4px 18px 2px,
    #123  5px 19px 2px,
    #123  6px 19px 2px,
    #123  7px 20px 2px,
    #123  8px 20px 2px,
    #123  9px 19px 2px,
    #123 10px 19px 2px,
    #123 11px 18px 2px,
    #123 12px 18px 2px,
    #123 13px 17px 2px,
    #123 14px 17px 2px,
    #123 15px 16px 2px,
    #123 16px 16px 2px
    ;
}

/* 仕上げ効果 */
/* ---------------------------------------- */

/* mix-blend-mode がサポートされているブラウザではオーバーレイ効果を付ける */
@supports (mix-blend-mode: overlay) {
  /* 最も上のレイヤー */
  .go-sen-chou-yen:after,
  .hoshii:after {
    -webkit-text-stroke-width: 14px;
    mix-blend-mode: overlay;
    filter: blur(1px);
  }
  
  .go-sen-chou-yen:after {
    background-image:
      radial-gradient(
        0.75em at 0.25em 0.125em,
        #FFF 20%,
        #FC0,
        #960,
        #655
      );
  }
  
  .hoshii:after {
    background-image:
      radial-gradient(
        0.75em at calc(100% - 0.25em) 0.125em,
        #FFF 30%,
        #366,
        #346
      );
  }
}

/* mix-blend-mode がサポートされていないブラウザでは仕上げ効果のレイヤーを描画しない */
@supports not (mix-blend-mode: overlay) {
  .go-sen-chou-yen:after,
  .hoshii:after {
    display: none;
  }
}
!

JS 

              
                document.addEventListener("DOMContentLoaded", () => {
  const setupEditableView = (contentID, wrapperID) => {
    const onInput = (event) => {
      const target = event.currentTarget;
      const value = target.innerText;
      target.dataset.text = value;
      let wrapper = document.getElementById(wrapperID);
      if (wrapper) {
        wrapper.dataset.text = value;
      }
    };
    let dom = document.getElementById(contentID);
    if (dom) {
      dom.addEventListener("input", onInput, false);
    }
  };
  const setupInput = (inputID, contentID, wrapperID) => {
    const onInput = (event) => {
      const value = event.currentTarget.value;
      const content = document.getElementById(contentID);
      if (content) {
        content.dataset.text = value;
        content.innerText = value;
      }
      const wrapper = document.getElementById(wrapperID);
      if (wrapper) {
        wrapper.dataset.text = value;
      }
    };
    const input = document.getElementById(inputID);
    if (input) {
      input.addEventListener("input", onInput, false);
    }
  };
  setupEditableView("content-upper", "logo-upper");
  setupEditableView("content-lower", "logo-lower");
  setupInput("input-upper", "content-upper", "logo-upper");
  setupInput("input-lower", "content-lower", "logo-lower");
});
!
999px

Console