<form role="search" method="get" class="searchform" action="<?php echo esc_url( home_url( '/' ) ); ?>">
    <div>
        <input type="text" name="s" class="input-search" placeholder="<?php _e('Search...', 'blogger-light');?>"/>
        <button type="submit" class="search-submit"></button>
    </div>
</form>