Shadow Style

[ssorallen]

Move styles inline to work in shadow DOM

• Remove tag name selector where scoping is no longer needed
• Replace tag name selector with :host when selecting based on host class name

Also...

• Add content to <button> elements to prevent them from collapsing in Firefox

[ssorallen]

@morethanreal, can you take another look?

[morethanreal]

lgtm

[ssorallen]

Thanks. :bee: