Fixed branding page and other fixes

assets/components.scss

assets/layout.scss

assets/main.scss

content/design.md

layouts/brand/single.html

layouts/design/single.html

layouts/index.html

layouts/partials/brand/logo.html

layouts/partials/brand/typography.html

layouts/partials/components/alerts.html

layouts/partials/components/buttons.html

layouts/partials/design/assets.html

layouts/partials/design/icons.html

static/images/safespace-vertical.svg