diff --git a/themes/typing/source/css/typing.css b/themes/typing/source/css/typing.css
index 4461193..87d4999 100644
--- a/themes/typing/source/css/typing.css
+++ b/themes/typing/source/css/typing.css
@@ -1,12 +1,515 @@
 @charset "utf-8";
-
-html {
-  -webkit-text-size-adjust: 100%;
+/* Document
+ * ========================================================================== */
+/**
+ * Add border box sizing in all browsers (opinionated).
+ */
+*,
+::before,
+::after {
+  box-sizing: border-box;
 }
+/**
+ * 1. Add text decoration inheritance in all browsers (opinionated).
+ * 2. Add vertical alignment inheritance in all browsers (opinionated).
+ */
+::before,
+::after {
+  text-decoration: inherit; /* 1 */
+  vertical-align: inherit; /* 2 */
+}
+/**
+ * 1. Use the default cursor in all browsers (opinionated).
+ * 2. Change the line height in all browsers (opinionated).
+ * 3. Use a 4-space tab width in all browsers (opinionated).
+ * 4. Remove the grey highlight on links in iOS (opinionated).
+ * 5. Prevent adjustments of font size after orientation changes in
+ *    IE on Windows Phone and in iOS.
+ * 6. Breaks words to prevent overflow in all browsers (opinionated).
+ */
+html {
+  cursor: default; /* 1 */
+  line-height: 1.5; /* 2 */
+  -moz-tab-size: 4; /* 3 */
+  -o-tab-size: 4;
+     tab-size: 4; /* 3 */
+  -webkit-tap-highlight-color: transparent /* 4 */;
+  -ms-text-size-adjust: 100%; /* 5 */
+  -webkit-text-size-adjust: 100%; /* 5 */
+  word-break: break-word; /* 6 */
+}
+/* Sections
+ * ========================================================================== */
+/**
+ * Remove the margin in all browsers (opinionated).
+ */
+body {
+  margin: 0;
+}
+/**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Edge, Firefox, and Safari.
+ */
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+/* Grouping content
+ * ========================================================================== */
+/**
+ * Remove the margin on nested lists in Chrome, Edge, IE, and Safari.
+ */
+dl dl,
+dl ol,
+dl ul,
+ol dl,
+ul dl {
+  margin: 0;
+}
+/**
+ * Remove the margin on nested lists in Edge 18- and IE.
+ */
+ol ol,
+ol ul,
+ul ol,
+ul ul {
+  margin: 0;
+}
+/**
+ * 1. Add the correct sizing in Firefox.
+ * 2. Show the overflow in Edge 18- and IE.
+ */
+hr {
+  height: 0; /* 1 */
+  overflow: visible; /* 2 */
+}
+/**
+ * Add the correct display in IE.
+ */
+main {
+  display: block;
+}
+/**
+ * Remove the list style on navigation lists in all browsers (opinionated).
+ */
+nav ol,
+nav ul {
+  list-style: none;
+  padding: 0;
+}
+/**
+ * 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
+ * ========================================================================== */
+/**
+ * Add the correct text decoration in Edge 18-, IE, and Safari.
+ */
+abbr[title] {
+  text-decoration: underline;
+  -webkit-text-decoration: underline dotted;
+          text-decoration: underline dotted;
+}
+/**
+ * Add the correct font weight in Chrome, Edge, and Safari.
+ */
+b,
+strong {
+  font-weight: bolder;
+}
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+code,
+kbd,
+samp {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+/**
+ * Add the correct font size in all browsers.
+ */
+small {
+  font-size: 80%;
+}
+/* Embedded content
+ * ========================================================================== */
+/*
+ * Change the alignment on media elements in all browsers (opinionated).
+ */
+audio,
+canvas,
+iframe,
+img,
+svg,
+video {
+  vertical-align: middle;
+}
+/**
+ * Remove the border on iframes in all browsers (opinionated).
+ */
+iframe {
+  border-style: none;
+}
+/**
+ * Change the fill color to match the text color in all browsers (opinionated).
+ */
+svg:not([fill]) {
+  fill: currentColor;
+}
+/**
+ * Hide the overflow in IE.
+ */
+svg:not(:root) {
+  overflow: hidden;
+}
+/* Tabular data
+ * ========================================================================== */
+/**
+ * Collapse border spacing in all browsers (opinionated).
+ */
+table {
+  border-collapse: collapse;
+}
+/* Forms
+ * ========================================================================== */
+/**
+ * Remove the margin on controls in Safari.
+ */
+button,
+input,
+select {
+  margin: 0;
+}
+/**
+ * 1. Show the overflow in IE.
+ * 2. Remove the inheritance of text transform in Edge 18-, Firefox, and IE.
+ */
+button {
+  overflow: visible; /* 1 */
+  text-transform: none; /* 2 */
+}
+/**
+ * Correct the inability to style buttons in iOS and Safari.
+ */
+button,
+[type="button"],
+[type="reset"],
+[type="submit"] {
+  -webkit-appearance: button;
+}
+/**
+ * 1. Change the inconsistent appearance in all browsers (opinionated).
+ * 2. Correct the padding in Firefox.
+ */
+fieldset {
+  border: 1px solid #a0a0a0; /* 1 */
+  padding: 0.35em 0.75em 0.625em; /* 2 */
+}
+/**
+ * Show the overflow in Edge 18- and IE.
+ */
+input {
+  overflow: visible;
+}
+/**
+ * 1. Correct the text wrapping in Edge 18- and IE.
+ * 2. Correct the color inheritance from `fieldset` elements in IE.
+ */
+legend {
+  color: inherit; /* 2 */
+  display: table; /* 1 */
+  max-width: 100%; /* 1 */
+  white-space: normal; /* 1 */
+}
+/**
+ * 1. Add the correct display in Edge 18- and IE.
+ * 2. Add the correct vertical alignment in Chrome, Edge, and Firefox.
+ */
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+/**
+ * Remove the inheritance of text transform in Firefox.
+ */
+select {
+  text-transform: none;
+}
+/**
+ * 1. Remove the margin in Firefox and Safari.
+ * 2. Remove the default vertical scrollbar in IE.
+ * 3. Change the resize direction in all browsers (opinionated).
+ */
+textarea {
+  margin: 0; /* 1 */
+  overflow: auto; /* 2 */
+  resize: vertical; /* 3 */
+}
+/**
+ * 1. Correct the odd appearance in Chrome, Edge, and Safari.
+ * 2. Correct the outline style in Safari.
+ */
+[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  outline-offset: -2px; /* 2 */
+}
+/**
+ * Correct the cursor style of increment and decrement buttons in Safari.
+ */
+::-webkit-inner-spin-button,
+::-webkit-outer-spin-button {
+  height: auto;
+}
+/**
+ * Correct the text style of placeholders in Chrome, Edge, and Safari.
+ */
+::-webkit-input-placeholder {
+  color: inherit;
+  opacity: 0.54;
+}
+/**
+ * Remove the inner padding in Chrome, Edge, and Safari on macOS.
+ */
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+/**
+ * 1. Correct the inability to style upload buttons in iOS and Safari.
+ * 2. Change font properties to `inherit` in Safari.
+ */
+::-webkit-file-upload-button {
+  -webkit-appearance: button; /* 1 */
+  font: inherit; /* 2 */
+}
+/**
+ * Remove the inner border and padding of focus outlines in Firefox.
+ */
+::-moz-focus-inner {
+  border-style: none;
+  padding: 0;
+}
+/**
+ * Restore the focus outline styles unset by the previous rule in Firefox.
+ */
+:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+/**
+ * Remove the additional :invalid styles in Firefox.
+ */
+:-moz-ui-invalid {
+  box-shadow: none;
+}
+/* Interactive
+ * ========================================================================== */
+/*
+ * Add the correct display in Edge 18- and IE.
+ */
+details {
+  display: block;
+}
+/*
+ * Add the correct styles in Edge 18-, IE, and Safari.
+ */
+dialog {
+  background-color: white;
+  border: solid;
+  color: black;
+  display: block;
+  height: -moz-fit-content;
+  height: -webkit-fit-content;
+  height: fit-content;
+  left: 0;
+  margin: auto;
+  padding: 1em;
+  position: absolute;
+  right: 0;
+  width: -moz-fit-content;
+  width: -webkit-fit-content;
+  width: fit-content;
+}
+dialog:not([open]) {
+  display: none;
+}
+/*
+ * Add the correct display in all browsers.
+ */
+summary {
+  display: list-item;
+}
+/* Scripting
+ * ========================================================================== */
+/**
+ * Add the correct display in IE.
+ */
+template {
+  display: none;
+}
+/* User interaction
+ * ========================================================================== */
+/*
+ * 1. Remove the tapping delay in IE 10.
+ * 2. Remove the tapping delay on clickable elements
+      in all browsers (opinionated).
+ */
+a,
+area,
+button,
+input,
+label,
+select,
+summary,
+textarea,
+[tabindex] { /* 1 */
+  touch-action: manipulation; /* 2 */
+}
+/* Accessibility
+ * ========================================================================== */
+/**
+ * Change the cursor on busy elements in all browsers (opinionated).
+ */
+[aria-busy="true"] {
+  cursor: progress;
+}
+/*
+ * Change the cursor on control elements in all browsers (opinionated).
+ */
+[aria-controls] {
+  cursor: pointer;
+}
+/*
+ * Change the cursor on disabled, not-editable, or otherwise
+ * inoperable elements in all browsers (opinionated).
+ */
+[aria-disabled="true"],
+[disabled] {
+  cursor: not-allowed;
+}
+/*
+ * Change the display on visually hidden accessible elements
+ * in all browsers (opinionated).
+ */
+[aria-hidden="false"][hidden] {
+  display: initial;
+}
+[aria-hidden="false"][hidden]:not(:focus) {
+  clip: rect(0, 0, 0, 0);
+  position: absolute;
+}
+/**
+ * 1. Change the inconsistent appearance in all browsers (opinionated).
+ * 2. Add typography inheritance in all browsers (opinionated).
+ */
+button,
+input,
+select,
+textarea {
+  background-color: transparent; /* 1 */
+  border: 1px solid WindowFrame; /* 1 */
+  color: inherit; /* 1 */
+  font: inherit; /* 2 */
+  letter-spacing: inherit; /* 2 */
+  padding: 0.25em 0.375em; /* 1 */
+}
+/**
+ * Change the inconsistent appearance in all browsers (opinionated).
+ */
+select {
+  -moz-appearance: none;
+  -webkit-appearance: none;
+  background: no-repeat right center / 1em;
+  border-radius: 0;
+  padding-right: 1em;
+}
+/**
+ * Change the inconsistent appearance in all browsers (opinionated).
+ */
+select:not([multiple]):not([size]) {
+  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='4'%3E%3Cpath d='M4 0h6L7 4'/%3E%3C/svg%3E");
+}
+/**
+ * Change the inconsistent appearance in IE (opinionated).
+ */
+::-ms-expand {
+  display: none;
+}
+/**
+ * Correct the inconsistent appearance in IE (opinionated).
+ */
+:-ms-input-placeholder {
+  color: rgba(0, 0, 0, 0.54);
+}
+/**
+ * Use a comfortable measure in all browsers (opinionated).
+ */
+html {
+  padding: 1em;
+}
+@media (min-width: 34em) {
+  html {
+    padding: 1em calc(50% - 16em);
+  }
+}
+/**
+ * Restrict sizing to the page width in all browsers (opinionated).
+ */
+iframe,
+img,
+input,
+select,
+textarea {
+  height: auto;
+  max-width: 100%;
+}
+/**
+ * Use the default user interface font in all browsers (opinionated).
+ */
+html {
+  font-family:
+    system-ui,
+    /* macOS 10.11-10.12 */ -apple-system,
+    /* Windows 6+ */ "Segoe UI",
+    /* Android 4+ */ "Roboto",
+    /* Ubuntu 10.10+ */ "Ubuntu",
+    /* Gnome 3+ */ "Cantarell",
+    /* KDE Plasma 5+ */ "Noto Sans",
+    /* fallback */ sans-serif,
+    /* macOS emoji */ "Apple Color Emoji",
+    /* Windows emoji */ "Segoe UI Emoji",
+    /* Windows emoji */ "Segoe UI Symbol",
+    /* Linux emoji */ "Noto Color Emoji";
+}
+/**
+ * Use the default monospace user interface font in all browsers (opinionated).
+ */
+code,
+kbd,
+samp,
+pre {
+  font-family:
+    /* macOS 10.10+ */ "Menlo",
+    /* Windows 6+ */ "Consolas",
+    /* Android 4+ */ "Roboto Mono",
+    /* Ubuntu 10.10+ */ "Ubuntu Monospace",
+    /* KDE Plasma 5+ */ "Noto Mono",
+    /* KDE Plasma 4+ */ "Oxygen Mono",
+    /* Linux/OpenOffice fallback */ "Liberation Mono",
+    /* fallback */ monospace,
+    /* macOS emoji */ "Apple Color Emoji",
+    /* Windows emoji */ "Segoe UI Emoji",
+    /* Windows emoji */ "Segoe UI Symbol",
+    /* Linux emoji */ "Noto Color Emoji";
+} /**/
 
 button,
 input,
-optgroup,
 select,
 textarea {
   font-family: inherit;
@@ -14,63 +517,6 @@ textarea {
   line-height: 1.15;
 }
 
-[type="button"],
-[type="reset"],
-[type="submit"],
-button {
-  -webkit-appearance: button;
-}
-
-[type="search"]::-webkit-search-decoration {
-  -webkit-appearance: none;
-}
-
-html.borderbox *,
-html.borderbox :after,
-html.borderbox :before {
-  box-sizing: border-box;
-}
-
-article,
-aside,
-blockquote,
-body,
-button,
-code,
-dd,
-details,
-dl,
-dt,
-fieldset,
-figcaption,
-figure,
-footer,
-form,
-h1,
-h2,
-h3,
-h4,
-h5,
-h6,
-header,
-hr,
-input,
-legend,
-li,
-menu,
-nav,
-ol,
-p,
-pre,
-section,
-td,
-textarea,
-th,
-ul {
-  margin: 0;
-  padding: 0;
-}
-
 body,
 button,
 input,
@@ -79,105 +525,10 @@ textarea {
   font: normal 1em/1.8 sans-serif;
 }
 
-button::-moz-focus-inner,
-input::-moz-focus-inner {
-  padding: 0;
-  border: 0;
-}
-
-table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-
-fieldset,
-img {
-  border: 0;
-}
-
-blockquote {
-  position: relative;
-  font-weight: 400;
-}
-
-abbr,
-acronym {
-  border-bottom: 1px dotted;
-  -webkit-font-feature-settings: normal;
-  font-feature-settings: normal;
-  font-variant: normal;
-}
-
-abbr {
-  cursor: help;
-}
-
-del {
-  text-decoration: line-through;
-}
-
-address,
-caption,
-cite,
-code,
-dfn,
-em,
-th,
-var {
-  font-style: normal;
-  font-weight: 400;
-}
-
-ol,
-ul {
-  list-style: none;
-}
-
-caption,
-th {
-  text-align: left;
-}
-
-q:after,
-q:before {
-  content: "";
-}
-
-:root sub,
-:root sup {
-  vertical-align: baseline;
-}
-
-.typo a:hover,
-a,
-ins {
-  text-decoration: none;
-}
-
-.typo-u,
-u {
-  text-decoration: underline;
-}
-
-mark {
-  background: #fffdd1;
-  border-bottom: 1px solid #ffedce;
-  padding: 2px;
-  margin: 0 5px;
-}
-
-code,
-pre,
-pre tt {
-  font-family: monospace, monospace;
-}
-
 pre {
   background: #f8f8f8;
   border: 1px solid #ddd;
   padding: 1em 1.5em;
-  display: block;
-  -webkit-overflow-scrolling: touch;
 }
 
 hr {
@@ -191,191 +542,80 @@ hr {
   margin-left: 25%;
 }
 
-.typo-small,
 figcaption,
 small {
   font-size: 0.9em;
   color: #888;
 }
 
-[draggable] {
-  cursor: move;
-}
-
-.clearfix:after,
-.clearfix:before {
-  content: "";
-  display: table;
-}
-
-.clearfix:after {
-  clear: both;
-}
-
-.clearfix {
-  zoom: 1;
-}
-
-.textwrap,
-.textwrap td,
-.textwrap th {
-  word-wrap: break-word;
-  word-break: break-all;
-}
-
-.textwrap-table {
-  table-layout: fixed;
-}
-
-.typo dl,
-.typo form,
-.typo hr,
-.typo ol,
-.typo p,
-.typo pre,
-.typo table,
-.typo ul,
-.typo-dl,
-.typo-form,
-.typo-hr,
-.typo-ol,
-.typo-p,
-.typo-pre,
-.typo-table,
-.typo-ul,
+dl,
+form,
+hr,
+ol,
+p,
+pre,
+table,
+ul,
 blockquote {
   margin-bottom: 1em;
 }
 
-.typo ul,
-.typo-ul {
+ul {
   margin-left: 1.3em;
   list-style: disc;
 }
 
-.typo ol,
-.typo-ol {
+ol {
   list-style: decimal;
   margin-left: 1.9em;
 }
 
-.typo li ol,
-.typo li ul,
-.typo-ol ol,
-.typo-ol ul,
-.typo-ul ol,
-.typo-ul ul {
+li ol,
+li ul,
+ol,
+ul {
   margin-bottom: 0.8em;
   margin-left: 2em;
 }
 
-.typo li ul,
-.typo-ol ul,
-.typo-ul ul {
+li ul,
+ul {
   list-style: circle;
 }
 
-.typo table caption,
-.typo table td,
-.typo table th,
-.typo-table td,
-.typo-table th {
+table caption,
+table td,
+table th,
+td,
+th {
   border: 1px solid #ddd;
   padding: 0.5em 1em;
   color: #666;
 }
 
-.typo table th,
-.typo-table th {
+table th,
+th {
   background: #fbfbfb;
 }
 
-.typo table thead th,
-.typo-table thead th {
+table thead th,
+thead th {
   background: #f1f1f1;
 }
 
-.typo table caption {
-  border-bottom: none;
-}
-
-.typo-input,
-.typo-textarea {
-  -webkit-appearance: none;
-  border-radius: 0;
-}
-
-.typo em,
-.typo-em,
+em,
 caption,
 legend {
   color: #000;
   font-weight: inherit;
 }
 
-.typo-em {
-  position: relative;
-}
-
-.typo-em:after {
-  position: absolute;
-  top: 0.65em;
-  left: 0;
-  width: 100%;
-  overflow: hidden;
-  white-space: nowrap;
-  content: "・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・";
-}
-
 html {
-  -webkit-text-size-adjust: 100%;
-  -ms-text-size-adjust: 100%;
-  text-rendering: optimizelegibility;
   font-family: sans-serif;
   line-height: 1.15;
-  -ms-text-size-adjust: 100%;
-  -webkit-text-size-adjust: 100%;
-}
-
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block;
-}
-
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-}
-
-audio:not([controls]) {
-  display: none;
-  height: 0;
-}
-
-progress {
-  vertical-align: baseline;
-}
-
-[hidden],
-template {
-  display: none;
 }
 
 a {
-  background-color: transparent;
-  -webkit-text-decoration-skip: objects;
   color: #222;
   transition: color 0.25s linear;
   cursor: pointer;
@@ -386,17 +626,6 @@ a:hover {
   outline-width: 0;
 }
 
-abbr[title] {
-  border-bottom: none;
-  text-decoration: underline;
-  -webkit-text-decoration: underline dotted;
-  text-decoration: underline dotted;
-}
-
-dfn {
-  font-style: italic;
-}
-
 h1 {
   font-family: serif;
   font-size: 1.5em;
@@ -412,44 +641,10 @@ h3 {
   font-size: 1.1em;
 }
 
-mark {
-  background-color: #ff0;
-  color: #000;
-}
-
-small {
-  font-size: 80%;
-}
-
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline;
-}
-
-sub {
-  bottom: -0.25em;
-}
-
-sup {
-  top: -0.5em;
-}
-
-img {
-  border-style: none;
-}
-
-svg:not(:root) {
-  overflow: hidden;
-}
-
 code,
 kbd,
 pre,
 samp {
-  font-family: monospace, monospace;
   font-size: 0.9em;
   background-color: #f3f5f6;
 }
@@ -458,94 +653,6 @@ figure {
   margin: 1em 40px;
 }
 
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  margin: 0;
-}
-
-optgroup {
-  font-weight: 700;
-}
-
-button,
-input {
-  overflow: visible;
-}
-
-button,
-select {
-  text-transform: none;
-}
-
-[type="reset"],
-[type="submit"],
-button,
-html [type="button"] {
-  -webkit-appearance: button;
-}
-
-[type="button"]::-moz-focus-inner,
-[type="reset"]::-moz-focus-inner,
-[type="submit"]::-moz-focus-inner,
-button::-moz-focus-inner {
-  border-style: none;
-  padding: 0;
-}
-
-fieldset {
-  border: 1px solid silver;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em;
-}
-
-legend {
-  box-sizing: border-box;
-  color: inherit;
-  display: table;
-  max-width: 100%;
-  padding: 0;
-  white-space: normal;
-}
-
-textarea {
-  overflow: auto;
-}
-
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  padding: 0;
-}
-
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto;
-}
-
-[type="search"] {
-  -webkit-appearance: textfield;
-  outline-offset: -2px;
-}
-
-[type="search"]::-webkit-search-cancel-button,
-[type="search"]::-webkit-search-decoration {
-  -webkit-appearance: none;
-}
-
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54;
-}
-
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  font: inherit;
-}
-
 .article .article-entry blockquote footer cite a:hover,
 .article .article-nav-link-wrap:hover {
   color: #22c5e5;
@@ -601,12 +708,10 @@ h5,
 h6 {
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
-  -moz-font-feature-settings: "liga" on;
   transition: 0.25s;
 }
 
 body {
-  margin: 0;
   font-family: sans-serif;
   font-size: 1.2em;
 }
@@ -1161,16 +1266,15 @@ samp {
   color: #e6e6e6;
 }
 
-.dark .typo em,
-.dark .typo-em,
+.dark em,
 .dark caption,
 .dark legend {
   color: #e6e6e6;
 }
 
-.dark .typo table caption,
-.dark .typo table td,
-.dark .typo-table td {
+.dark table caption,
+.dark table td,
+.dark td {
   border: 1px solid #ddd;
   color: #e6e6e6;
 }
@@ -1365,8 +1469,6 @@ pre .keyword {
   width: 85%;
   padding-left: 0.2em;
   box-sizing: border-box;
-  -moz-box-sizing: border-box;
-  -webkit-box-sizing: border-box;
 }
 
 /* highlight the text box when focused */
@@ -1427,7 +1529,6 @@ svg#link {
   /* use grid to display each link in new line */
   #mobile-menu-toggle:checked + .mobile-nav-link {
     display: grid;
-    display: -ms-grid;
   }
 }
 
@@ -1484,10 +1585,10 @@ svg#link {
   font-size: 0.8em;
   line-height: 1em;
   padding: 5px;
-  user-select: none;
   -webkit-user-select: none;
-  -moz-user-select: none;
-  -ms-user-select: none;
+     -moz-user-select: none;
+      -ms-user-select: none;
+          user-select: none;
 }
 
 .copy-button:hover {