Styles Sitecore controls with Bootstrap inspired style (for Labels and Sitecore Text controls). The trick is in knowing that the span following the .scChromeData element is the content editable one used by Sitecore.

BootstrapLikeStyledSitecoreControls.aspx

<div class="sitecore-form">
        <div>
            <label>Name</label>
        </div>
        <div>
            <sc:Text runat="server" Field="Name" />
        </div>

        <div>
            <label>Title</label>
        </div>
        <div>
            <sc:Text runat="server" Field="Title" />
        </div>

        <div>
            <label>Bio</label>
        </div>
        <div>
            <sc:Text runat="server" Field="Bio" />
        </div>

        <div>
            <label>Picture</label>
        </div>
        <div>
            <sc:Image runat="server" Field="Picture" />
        </div>

    </div>

style.css

.sitecore-form label {
    display: block;
    margin: 10px 0;
    font-weight: bold;
    font-size: 18px;
    text-decoration: underline;
}

.sitecore-form .scChromeData + span {
    border: 1px solid #ccc;
    -ms-border-radius: 4px;
    border-radius: 4px;
    color: #555;
    font-size: 14px;
    padding: 6px 12px;
    margin-left: 15px;
    width: 100%;
    display: block;
    -webkit-box-shadow: inset 0 1px 1px #000000;
    -ms-box-shadow: inset 0 1px 1px #000000;
    box-shadow: inset 0 1px 1px #000000;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075);
    -webkit-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
    -moz-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
    -ms-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
    -o-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
}