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CSS

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HTML 

              
                <div class="wrapper">
  <nav>
    ナビゲーションエリア
  </nav>
  <main class="main">
    <h2>メインエリア</h2>
    <div class="tweet">
      <p>よく晴れた気持ちのいい朝。飼い猫の💩の強烈なかほりで私の目は覚めた。ふと見ると、彼はらんらんとした瞳で私を見つめ、彼の創造物を片付けることを期待していた。</p>
      <div class="reaction-bar">
        <div class="reaction">
          <button class="material-symbols-rounded">chat_bubble</button>
          <span class="text">返信する</span>
          <span class="count">60</span>
        </div>
        <div class="reaction">
          <button class="material-symbols-rounded">favorite</button>
          <span class="text">いいね</span>
          <span class="count">120</span>
        </div>
        <div class="reaction">
          <button class="material-symbols-rounded">bar_chart</button>
          <span class="text">View数</span>
          <span class="count">1.2K</span>
        </div>
        <div class="reaction">
          <button class="material-symbols-rounded">share</button>
          <span class="text">シェアする</span>
        </div>
      </div>
    </div>
    <section>
      <h3>1カラム・2カラムが切り替わるエリア</h3>
      <div class="section-inner">
        <div class="tweet">
          <p>「やれやれ…」私は立ち上がり、スコップを手に取る。そう、私は"Splendid cleaner of cat creations"（猫の創造物の華麗な掃除屋）。今日も我が家の秩序のために闘うのだ。</p>
          <div class="reaction-bar">
            <div class="reaction">
              <button class="material-symbols-rounded">chat_bubble</button>
              <span class="text">返信する</span>
              <span class="count">12</span>
            </div>
            <div class="reaction">
              <button class="material-symbols-rounded">favorite</button>
              <span class="text">いいね</span>
              <span class="count">30</span>
            </div>
            <div class="reaction">
              <button class="material-symbols-rounded">bar_chart</button>
              <span class="text">View数</span>
              <span class="count">980</span>
            </div>
            <div class="reaction">
              <button class="material-symbols-rounded">share</button>
              <span class="text">シェアする</span>
            </div>
          </div>
        </div>
        <div class="tweet">
          <p>その創造物は想像を超えていたーーー。まるでジャック・ライアンがスレイマンに追い詰められ、右手の手榴弾のピンを外したときのように、私の緊張感は最高潮に達していた。</p>
          <div class="reaction-bar">
            <div class="reaction">
              <button class="material-symbols-rounded">chat_bubble</button>
              <span class="text">返信する</span>
              <span class="count">10.4K</span>
            </div>
            <div class="reaction">
              <button class="material-symbols-rounded">favorite</button>
              <span class="text">いいね</span>
              <span class="count">120</span>
            </div>

            <div class="reaction">
              <button class="material-symbols-rounded">bar_chart</button>
              <span class="text">View数</span>
              <span class="count">20K</span>
            </div>
            <div class="reaction">
              <button class="material-symbols-rounded">share</button>
              <span class="text">シェアする</span>
            </div>

          </div>
        </div>
      </div>
    </section>
  </main>
</div>
!

CSS 

              
                .reaction-bar {
  container-type: inline-size;
}

@container (max-width: 560px) {
  .reaction-bar .text {
    display: none;
  }
}


/* その他のスタイル */


:root {
  --main-color: 139, 152, 165;
  --padding: 16px;
}

body {
  font-family: "游ゴシック Medium", YuGothic, YuGothicM,
  "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.7;
  color: rgb(var(--main-color));
  background-color: rgb(32, 43, 54);
}

.material-symbols-rounded {
  color: currentColor;
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 48;
}


.wrapper {
  display: grid;
  align-content: start;
  height: calc(100svh - 16px * 2);
  padding: var(--padding);
  grid-template:
    "nav main" 1fr /
    200px 1fr;
}


@media (max-width: 650px) {
  .wrapper {
    grid-template:
      "nav" auto
      "main" auto
      / 1fr;
  }
}

nav {
  display: grid;
  background-color: rgba(var(--main-color), 0.2);
  writing-mode: vertical-rl;
  place-content: center;
}

@media (max-width: 650px) {
  nav {
    height: 70px;
    writing-mode: horizontal-tb;
  }
}

.main {
  padding: var(--padding);
}

.section-inner {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.section-inner > .tweet {
  padding: var(--padding);
  border: 1px solid rgba(var(--main-color), 0.3);
  border-radius: 3px;
}

.reaction-bar {
  font-size: 14px;
  display: flex;
  gap: 20px;
}

.reaction {
  display: flex;
  align-items: center;
  gap: 6px;
}


button {
  width: var(--size);
  height: var(--size);
  padding: 0;
  cursor: pointer;
  transition: 0.3s;
  border: none;
  border-radius: calc(var(--size) / 2);
  background-color: transparent;
  --size: 40px;
}

button:hover {
  color: rgb(242, 43, 131);
  background-color: rgba(242, 43, 131, 0.3);
}
!

JS
!
999px

Console