Define a class name in your input field and give some padding in input box.
For example:
This your input field.
<input type="text" class="my_text_field" placeholder="Enter name" name="name">
Apply this CSS code.
<style type="text/css"> .my_text_field{ display: block; width: 100%; height: 34px; padding: 6px 12px; font-size: 14px; } </style>
I hope it will be helpful for you.
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