To set focus on page load using pure html you can use the autofocus keyword. Here is an example on JsFiddle. And to set the css for on focus use the :focus selector in your css. Below is the sample code I have used.

<form>
    <input type="text" id="FirstName" placeholder="First Name" autofocus>
    <input type="text" id="LastName" placeholder="Last Name">
    <input type="text" id="EmailAddress" placeholder="Email Address">
</form>

@import url(http://fonts.googleapis.com/css?family=Roboto);
form input {font-family: Roboto;}
form input:focus {border: 1px solid #044068;}

Hope this helps.