refactor(components): update to use shadow DOM and work with css variables

- updates components to use shadow DOM or scoped if they require css variables
- moves global styles to an external stylesheet that needs to be imported
- adds support for additional colors and removes the Sass loops to generate colors for each component
- several property renames, bug fixes, and test updates

Co-authored-by: Manu Mtz.-Almeida <manu.mtza@gmail.com>
Co-authored-by: Adam Bradley <adambradley25@gmail.com>
Co-authored-by: Cam Wiegert <cam@camwiegert.com>

core/src/css/normalize.scss

@@ -0,0 +1,234 @@
+// ! normalize.css v3.0.2 | MIT License | github.com/necolas/normalize.css
+
+
+// HTML5 display definitions
+// ==========================================================================
+
+// 1. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
+audio,
+canvas,
+progress,
+video {
+  vertical-align: baseline; // 1
+}
+
+// Prevent modern browsers from displaying `audio` without controls.
+// Remove excess height in iOS 5 devices.
+audio:not([controls]) {
+  display: none;
+
+  height: 0;
+}
+
+
+// Text-level semantics
+// ==========================================================================
+
+// Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
+b,
+strong {
+  font-weight: bold;
+}
+
+
+// Embedded content
+// ==========================================================================
+
+// Remove border when inside `a` element in IE 8/9/10.
+img {
+  max-width: 100%;
+
+  border: 0;
+}
+
+// Correct overflow not hidden in IE 9/10/11.
+svg:not(:root) {
+  overflow: hidden;
+}
+
+
+// Grouping content
+// ==========================================================================
+
+// Address margin not present in IE 8/9 and Safari.
+figure {
+  margin: 1em 40px;
+}
+
+hr {
+  height: 1px;
+
+  border-width: 0;
+
+  box-sizing: content-box;
+}
+
+// Contain overflow in all browsers.
+pre {
+  overflow: auto;
+}
+
+// Address odd `em`-unit font size rendering in all browsers.
+code,
+kbd,
+pre,
+samp {
+  font-family: monospace, monospace;
+  font-size: 1em;
+}
+
+
+// Forms
+// ==========================================================================
+
+// Known limitation: by default, Chrome and Safari on OS X allow very limited
+// styling of `select`, unless a `border` property is set.
+
+// 1. Correct color not being inherited.
+//    Known issue: affects color of disabled elements.
+// 2. Correct font properties not being inherited.
+// 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
+//
+
+label,
+input,
+select,
+textarea {
+  font-family: inherit;
+  line-height: normal;
+}
+
+textarea {
+  overflow: auto;
+
+  height: auto;
+
+  font: inherit;
+  color: inherit;
+}
+
+textarea::placeholder {
+  padding-left: 2px;
+}
+
+form,
+input,
+optgroup,
+select {
+  margin: 0; // 3
+
+  font: inherit; // 2
+  color: inherit; // 1
+}
+
+// 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
+//    and `video` controls.
+// 2. Correct inability to style clickable `input` types in iOS.
+// 3. Improve usability and consistency of cursor style between image-type
+//    `input` and others.
+html input[type="button"], // 1
+input[type="reset"],
+input[type="submit"] {
+  cursor: pointer; // 3
+
+  -webkit-appearance: button; // 2
+}
+
+// remove 300ms delay
+a,
+a div,
+a span,
+a ion-icon,
+a ion-label,
+button,
+button div,
+button span,
+button ion-icon,
+button ion-label,
+[tappable],
+[tappable] div,
+[tappable] span,
+[tappable] ion-icon,
+[tappable] ion-label,
+input,
+textarea {
+  touch-action: manipulation;
+}
+
+a ion-label,
+button ion-label {
+  pointer-events: none;
+}
+
+button {
+  border: 0;
+  border-radius: 0;
+  font-family: inherit;
+  font-style: inherit;
+  font-variant: inherit;
+  line-height: 1;
+  text-transform: none;
+  cursor: pointer;
+
+  -webkit-appearance: button;
+}
+
+[tappable] {
+  cursor: pointer;
+}
+
+// Re-set default cursor for disabled elements.
+a[disabled],
+button[disabled],
+html input[disabled] {
+  cursor: default;
+}
+
+// Remove inner padding and border in Firefox 4+.
+button::-moz-focus-inner,
+input::-moz-focus-inner {
+  padding: 0;
+
+  border: 0;
+}
+
+// Firefox's implementation doesn't respect box-sizing, padding, or width.
+// 1. Address box sizing set to `content-box` in IE 8/9/10.
+// 2. Remove excess padding in IE 8/9/10.
+input[type="checkbox"],
+input[type="radio"] {
+  padding: 0; // 2
+
+  box-sizing: border-box; // 1
+}
+
+// Fix the cursor style for Chrome's increment/decrement buttons. For certain
+// `font-size` values of the `input`, it causes the cursor style of the
+// decrement button to change from `default` to `text`.
+input[type="number"]::-webkit-inner-spin-button,
+input[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+// Remove inner padding and search cancel button in Safari and Chrome on OS X.
+// Safari (but not Chrome) clips the cancel button when the search input has
+// padding (and `textfield` appearance).
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+
+// Tables
+// ==========================================================================//
+
+// Remove most spacing between table cells.
+table {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+td,
+th {
+  padding: 0;
+}