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<html><head><style> div { background-color: lightgreen; inline-size: 70%; border-block-start-style: solid; border-block-start-width: 10px;}</style></head><body><h2>border-block-start-width: 10px:</h2><div> <p>The border-block-start-width property defines the width of the border at the start in the block direction.</p></div></body></html>