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<html><head><style>.grid-container { display: grid; grid-template-columns: 1fr 2fr 200px; gap: 10px; background-color: dodgerblue; padding: 10px;}.grid-container > div { background-color: #f1f1f1; color: #000; padding: 10px; font-size: 30px; text-align: center;}</style></head><body><h1>The fr Unit</h1><p>The fr unit is a fractional unit. 1fr equals 1 part of the available space.</p><div class="grid-container"> <div>1fr</div> <div>2fr</div> <div>200px</div> </div></body></html>