title: how to style menu.item on semantic ui React <input> search bar precisely
body: <p>The code is the menu style of semantic ui available for React including a search input i want to increase the size of the search input and also change the color.</p>
  <pre><code>&lt;Menu secondary&gt;
              &lt;Menu.Item&gt;
                &lt;img alt=&quot;logo&quot; src={logo} 
                 active={activeItem === 'home'}
                 onClick={this.handleItemClick}
                /&gt;
              &lt;/Menu.Item&gt;
              &lt;Menu.Item&gt;
                  &lt;Input icon='circle outline' iconPosition='left' placeholder='Search...' /&gt;
              &lt;/Menu.Item&gt;
              &lt;Menu.Menu position='right'&gt;
                
                &lt;Menu.Item
                  name='logout'
                  active={activeItem === 'logout'}
                  onClick={this.handleItemClick}
                /&gt;
              &lt;/Menu.Menu&gt;
            &lt;/Menu&gt;
  </code></pre>