How to align lwc made with slds grid?
Can anyone guide me on how to align columns and rows?
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I think you are using incorrect classes for column sizing. The slds grid is a 12 column grid, not 16. You need to divide the viewport into 4 divisions. It can be 3,3,3,3 or 2,4,4,2 or anything else.
Based on that you can fix the col classes.
Also in your lightning:input, if you do not want to show the label, use the variant="label-hidden"
You can also utilise lightning:layout for this.