Bootstrap 3

HTML

<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<div class="form-body">
    <div class="row">
        <div class="col-md-2">
            <div class="form-group">
                <label class="radio-inline">
                    <input type="radio" ID="optRequestImmediate" runat="server">Immediately</input>
                </label>
                <label class="radio-inline">
                    <input type="radio" ID="optRequestAt" runat="server">At:</input>
                </label>
            </div>
        </div>
        <div class="col-md-2">
            <div class="form-group">
                <label>Request Date</label>
                <input ID="txtRequestDate" Class="form-control date" runat="server"></input>
            </div>
        </div>
        <div class="col-md-2">
            <div class="form-group">
                <label>Request Time</label>
                <input ID="txtRequestTime" Class="form-control time" runat="server"></input>
            </div>
        </div>
        <div class="col-md-4">
            <div class="form-group">
                <button ID="btnRequest" Class="btn green" Text="Request Synchronization">Request Synchronization</button>
            </div>
        </div>
    </div>
</div>

CSS

.big-box, .small-box {
    border: 1px solid red;
}