How to add style to the search widget ?

Hi, I need to eliminate the "margin-bottom of 18 that adds {view:search} by default, I need to add style="margin-bottom: 0px;" someware but I don't know.
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Part of my index event:
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{fn:read_datos}
<div class="ui divider"></div>
<div class="ui segment">
<div class="ui three column grid">
<div class="column">{view:new_dato_button}</div>
<div class="column"></div>
<div class="column">{view:search}</div>
</div>
</div>
<div class="ui divider"></div>

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Thanks,
Pablo

Sorry, it was the ISIS template in administrator's context.