HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Card grid</title>
    <style>
      *, *::before, *::after { box-sizing: border-box; }

body {
        font: 16px/1.6 system-ui, sans-serif;
        margin: 0;
        padding: clamp(1rem, 4vw, 2rem);
        background: #fbfbfd;
        color: #16181d;
      }

h1 { font-size: clamp(1.5rem, 1rem + 2.5vw, 2.25rem); margin: 0 0 1.25rem; }

/* No media query. auto-fit fits as many columns as will hold
         14rem, and min() stops the track overflowing a narrow box. */
      .cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(min(14rem, 100%), 1fr));
        gap: 1rem;
        list-style: none;
        margin: 0;
        padding: 0;
      }

.card {
        display: grid;
        grid-template-rows: auto 1fr auto;
        gap: .4rem;
        background: #fff;
        border: 1px solid #e3e5ea;
        border-radius: 10px;
        padding: 1rem;
      }

.card h2 { margin: 0; font-size: 1rem; }
      .card p  { margin: 0; color: #5c626e; font-size: .925rem; }
      .card .meta { color: #868c99; font-size: .8rem; }
    </style>
  </head>
  <body>
    <h1>Drag the window edge</h1>
    <ul class="cards">
      <li class="card">
        <h2>auto-fit</h2>
        <p>Fits as many columns as will hold the minimum.</p>
        <span class="meta">grid-template-columns</span>
      </li>
      <li class="card">
        <h2>minmax</h2>
        <p>At least 14rem, at most one fair share of what is left.</p>
        <span class="meta">track sizing</span>
      </li>
      <li class="card">
        <h2>1fr rows</h2>
        <p>The meta line sits at the bottom however long this text gets.</p>
        <span class="meta">grid-template-rows</span>
      </li>
    </ul>
  </body>
</html>

Output

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