diff --git a/normalize.scss b/normalize.scss
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+/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */
+
+/* Document
+   ========================================================================== */
+
+/**
+ * 1. Correct the line height in all browsers.
+ * 2. Prevent adjustments of font size after orientation changes in iOS.
+ */
+
+html {
+  line-height: 1.15; /* 1 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/* Sections
+   ========================================================================== */
+
+/**
+ * Remove the margin in all browsers.
+ */
+
+body {
+  margin: 0;
+}
+
+/**
+ * Render the `main` element consistently in IE.
+ */
+
+main {
+  display: block;
+}
+
+/**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/* Grouping content
+   ========================================================================== */
+
+/**
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge and IE.
+ */
+
+hr {
+  box-sizing: content-box; /* 1 */
+  height: 0; /* 1 */
+  overflow: visible; /* 2 */
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+pre {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/* Text-level semantics
+   ========================================================================== */
+
+/**
+ * Remove the gray background on active links in IE 10.
+ */
+
+a {
+  background-color: transparent;
+}
+
+/**
+ * 1. Remove the bottom border in Chrome 57-
+ * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
+ */
+
+abbr[title] {
+  border-bottom: none; /* 1 */
+  text-decoration: underline; /* 2 */
+  text-decoration: underline dotted; /* 2 */
+}
+
+/**
+ * Add the correct font weight in Chrome, Edge, and Safari.
+ */
+
+// SCSS extend for `b` and `strong`.
+
+%bold-text {
+  font-weight: bolder;
+}
+
+b {
+  @extend %bold-text;
+}
+
+strong {
+  @extend %bold-text;
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+// SCSS extend for `code`, `kbd` and `samp`.
+
+%monospace-text {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+code {
+  @extend %monospace-text;
+}
+
+kbd {
+  @extend %monospace-text;
+}
+
+samp {
+  @extend %monospace-text;
+}
+
+/**
+ * Add the correct font size in all browsers.
+ */
+
+small {
+  font-size: 80%;
+}
+
+/**
+ * Prevent `sub` and `sup` elements from affecting the line height in
+ * all browsers.
+ */
+
+// SCSS extend for `sub` and `sup`.
+
+%sub-sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+
+sub {
+  @extend %sub-sup;
+  bottom: -0.25em;
+}
+
+sup {
+  @extend %sub-sup;
+  top: -0.5em;
+}
+
+/* Embedded content
+   ========================================================================== */
+
+/**
+ * Remove the border on images inside links in IE 10.
+ */
+
+img {
+  border-style: none;
+}
+
+/* Forms
+   ========================================================================== */
+
+/**
+ * 1. Change the font styles in all browsers.
+ * 2. Remove the margin in Firefox and Safari.
+ */
+
+// SCSS extend for `button`, `input`, `optgroup`, `select` and `textarea`.
+
+%button-input-optgroup-select-textarea {
+  font-family: inherit; /* 1 */
+  font-size: 100%; /* 1 */
+  line-height: 1.15; /* 1 */
+  margin: 0; /* 2 */
+}
+
+/**
+ * Show the overflow in IE.
+ * 1. Show the overflow in Edge.
+ */
+
+// SCSS extend for `button` and `input`.
+
+%button-input { /* 1 */
+  overflow: visible;
+}
+
+/**
+ * Remove the inheritance of text transform in Edge, Firefox, and IE.
+ * 1. Remove the inheritance of text transform in Firefox.
+ */
+
+// SCSS extend for `button` and `select`.
+
+%button-select { /* 1 */
+  text-transform: none;
+}
+
+/**
+ * Correct the inability to style clickable types in iOS and Safari.
+ */
+
+// SCSS extend for `button`, `[type="button"]`, `[type="reset"]` and `[type="submit"]`.
+
+%button-type {
+  -webkit-appearance: button;
+}
+
+/**
+ * Remove the inner border and padding in Firefox.
+ */
+
+// SCSS extend for `button::-moz-focus-inner`, `[type="button"]::-moz-focus-inner`, `[type="reset"]::-moz-focus-inner` and `[type="submit"]::-moz-focus-inner`.
+
+%button-type-focus {
+  border-style: none;
+  padding: 0;
+}
+
+/**
+ * Restore the focus styles unset by the previous rule.
+ */
+
+// SCSS extend for `button:-moz-focusring`, `[type="button"]:-moz-focusring`, `[type="reset"]:-moz-focusring` and `[type="submit"]:-moz-focusring`.
+
+%button-type-focusring {
+  outline: 1px dotted ButtonText;
+}
+
+/**
+ * Correct the cursor style of increment and decrement buttons in Chrome.
+ */
+
+// SCSS extend for `[type="number"]::-webkit-inner-spin-button` and `[type="number"]::-webkit-outer-spin-button`.
+
+%number-type-button-spin {
+  height: auto;
+}
+
+[type="number"] {
+  &::-webkit-inner-spin-button {
+    @extend %number-type-button-spin
+  }
+  
+  &::-webkit-outer-spin-button {
+    @extend %number-type-button-spin
+  }
+}
+
+[type="button"] {
+  @extend %button-type;
+  
+  &::-moz-focus-inner {
+    @extend %button-type-focus;
+  }
+  
+  &:-moz-focusring {
+    @extend %button-type-focusring;
+  }
+}
+
+[type="reset"] {
+  @extend %button-type;
+  
+  &::-moz-focus-inner {
+    @extend %button-type-focus;
+  }
+  
+  &:-moz-focusring {
+    @extend %button-type-focusring;
+  }
+}
+
+[type="submit"] {
+  @extend %button-type;
+  
+  &::-moz-focus-inner {
+    @extend %button-type-focus;
+  }
+  
+  &:-moz-focusring {
+    @extend %button-type-focusring;
+  }
+}
+
+button {
+  @extend %button-input-optgroup-select-textarea;
+  @extend %button-input;
+  @extend %button-select;
+  @extend %button-type;
+  
+  &::-moz-focus-inner {
+    @extend %button-type-focus;
+  }
+}
+
+input {
+  @extend %button-input-optgroup-select-textarea;
+  @extend %button-input;
+}
+
+optgroup {
+  @extend %button-input-optgroup-select-textarea;
+}
+
+select {
+  @extend %button-input-optgroup-select-textarea;
+  @extend %button-select;
+}
+
+textarea {
+  @extend %button-input-optgroup-select-textarea;
+}
+
+/**
+ * Correct the padding in Firefox.
+ */
+
+fieldset {
+  padding: 0.35em 0.75em 0.625em;
+}
+
+/**
+ * 1. Correct the text wrapping in Edge and IE.
+ * 2. Correct the color inheritance from `fieldset` elements in IE.
+ * 3. Remove the padding so developers are not caught out when they zero out
+ *    `fieldset` elements in all browsers.
+ */
+
+legend {
+  box-sizing: border-box; /* 1 */
+  color: inherit; /* 2 */
+  display: table; /* 1 */
+  max-width: 100%; /* 1 */
+  padding: 0; /* 3 */
+  white-space: normal; /* 1 */
+}
+
+/**
+ * Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  vertical-align: baseline;
+}
+
+/**
+ * Remove the default vertical scrollbar in IE 10+.
+ */
+
+textarea {
+  overflow: auto;
+}
+
+/**
+ * 1. Add the correct box sizing in IE 10.
+ * 2. Remove the padding in IE 10.
+ */
+
+// SCSS extend for `[type="checkbox"]` and `[type="radio"]`.
+
+%checkbox-radio {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+[type="checkbox"] {
+  @extend %checkbox-radio;
+}
+
+[type="radio"] {
+  @extend %checkbox-radio;
+}
+
+/**
+ * 1. Correct the odd appearance in Chrome and Safari.
+ * 2. Correct the outline style in Safari.
+ */
+
+[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  outline-offset: -2px; /* 2 */
+}
+
+/**
+ * Remove the inner padding in Chrome and Safari on macOS.
+ */
+
+[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * 1. Correct the inability to style clickable types in iOS and Safari.
+ * 2. Change font properties to `inherit` in Safari.
+ */
+
+::-webkit-file-upload-button {
+  -webkit-appearance: button; /* 1 */
+  font: inherit; /* 2 */
+}
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in Edge, IE 10+, and Firefox.
+ */
+
+details {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Misc
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10+.
+ */
+
+template {
+  display: none;
+}
+
+/**
+ * Add the correct display in IE 10.
+ */
+
+[hidden] {
+  display: none;
+}
