How to change the style of kartik datetime picker's div

Hi, I am using kartik date time picker. I know how to change the style of the date time picker itself but I want to change the style of the div in which the datetime picker is placed. Below is my code

`<form action="index" method="post" >
            <select id="s" name="dtype" class="dropdown" required
                    style="float: left; text-align: left;width: 20%; margin: 10px;">
                <option value="400">Select Data Type</option>
                <option value="401">Current</option>
                <option value="402">Voltage</option>
                <option value="403">kWh</option>
            </select>

            <input style="float: left; text-align: left; margin: 10px; width: 20%" type="text" id="name" name="msn" required
                   minlength="4" maxlength="15" size="15" placeholder="MSN" autocomplete="off">

            <p style="float: right; text-align: right; width: 20%; margin: 5px;">
                <input type="submit" class="btn btn-success pull-right" />
            </p>

                <?=
                DateTimePicker::widget([
                    'name' => 'datetime_10',

                    'options' => [
                            'placeholder' => 'Start Date Time',
                            'autocomplete' => 'off'
                            ],
                    'convertFormat' => false,
                    'pluginOptions' => [
                        'format' => 'yyyy-mm-dd hh:i:ss',
                        'startDate' => '01-Mar-2014 12:00 AM',
                        'todayHighlight' => true,

                    ]
                ]);
                ?>



                <?=
                DateTimePicker::widget([
                    'name' => 'datetime_11',

                    'options' => [
                            'placeholder' => 'End Date Time',
                            'autocomplete' => 'off'
                            ],
                    'convertFormat' => false,
                    'pluginOptions' => [
                        'format' => 'yyyy-mm-dd hh:i:ss',
                        'startDate' => '01-Mar-2014 12:00 AM',
                        'todayHighlight' => true,

                    ]
                ]);
                ?>



        </form>`

My output

I want to set the date time picker in one line along with other fields. How can I do it?