🚀 init: initial boilerplate

styles/abstracts/_colors.scss

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+$colors: (
+  primary: (
+    400: #fff,
+    600: #d9d9d9,
+  ),
+  secondary: (
+    400: #000,
+    600: #272727,
+  ),
+);

styles/abstracts/_mixins.scss

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+@mixin display-flex($content: center, $items: center, $direction: row) {
+  display: flex;
+  justify-content: #{$content};
+  align-items: #{$items};
+  flex-direction: #{$direction};
+}
+
+@mixin element-invisible($enforce: true) {
+  $important: if($enforce, "!important", null);
+
+  position: absolute #{$important};
+  width: 1px #{$important};
+  height: 1px #{$important};
+  padding: 0 #{$important};
+  overflow: hidden #{$important};
+  clip: rect(0, 0, 0, 0) #{$important};
+  white-space: nowrap #{$important};
+  border: 0 #{$important};
+}
+
+@mixin element-invisible-off($enforce: true) {
+  $important: if($enforce, "!important", null);
+
+  position: static #{$important};
+  width: auto #{$important};
+  height: auto #{$important};
+  overflow: visible #{$important};
+  clip: auto #{$important};
+  white-space: normal #{$important};
+}
+
+@mixin css-triangle($triangle-size, $triangle-color, $triangle-direction) {
+  content: "";
+  display: block;
+  width: 0;
+  height: 0;
+  border-style: solid;
+  border-width: $triangle-size;
+
+  @if $triangle-direction == down {
+    border-bottom-width: 0;
+    border-color: $triangle-color transparent transparent;
+  }
+  @if $triangle-direction == up {
+    border-top-width: 0;
+    border-color: transparent transparent $triangle-color;
+  }
+  @if $triangle-direction == right {
+    border-right-width: 0;
+    border-color: transparent transparent transparent $triangle-color;
+  }
+  @if $triangle-direction == left {
+    border-left-width: 0;
+    border-color: transparent $triangle-color transparent transparent;
+  }
+}

styles/abstracts/_variables.scss

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+$breakpoints: (
+  small: 320px,
+  medium: 768px,
+  large: 1024px,
+) !default;

styles/base/_helpers.scss

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+%content {
+  position: absolute;
+  content: "";
+}
+
+%container {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 20px;
+}
+
+%vertical-center {
+  position: absolute;
+  top: 50%;
+  transform: translateY(-50%);
+}
+
+%horizontal-center {
+  position: absolute;
+  left: 50%;
+  transform: translateX(-50%);
+}
+
+%absolute-center {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+}

styles/base/_root.scss

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+@use "../abstracts/colors" as *;
+
+:root {
+  @each $color, $shades in $colors {
+    @each $prop, $value in $shades {
+      --#{$color}-#{$prop}: #{$value};
+    }
+  }
+}

styles/main.scss

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+@use "base/root" as *;
+@use "vendors/normalize" as *;

styles/vendors/_normalize.scss

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+// 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;
+}
+
+// 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, sans-serif; // 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: 0; // 1
+  text-decoration: underline dotted; // 2
+}
+
+// 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, sans-serif; // 1
+  font-size: 1em; // 2
+}
+
+// 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.
+
+sub,
+sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+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.
+
+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.
+
+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.
+
+button,
+select {
+  // 1
+  text-transform: none;
+}
+
+// Correct the inability to style clickable types in iOS and Safari.
+
+button,
+[type="button"],
+[type="reset"],
+[type="submit"] {
+  -webkit-appearance: button;
+}
+
+// Remove the inner border and padding in Firefox.
+
+button::-moz-focus-inner,
+[type="button"]::-moz-focus-inner,
+[type="reset"]::-moz-focus-inner,
+[type="submit"]::-moz-focus-inner {
+  border-style: none;
+  padding: 0;
+}
+
+// Restore the focus styles unset by the previous rule.
+
+button:-moz-focusring,
+[type="button"]:-moz-focusring,
+[type="reset"]:-moz-focusring,
+[type="submit"]:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+
+// 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.
+
+[type="checkbox"],
+[type="radio"] {
+  box-sizing: border-box; // 1
+  padding: 0; // 2
+}
+
+// Correct the cursor style of increment and decrement buttons in Chrome.
+
+[type="number"]::-webkit-inner-spin-button,
+[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+// 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;
+}
+
+// Disable outline when intent is clearly mouse and touch
+[data-whatintent="mouse"],
+[data-whatintent="touch"],
+[data-whatinput="mouse"],
+[data-whatinput="touch"] {
+  *,
+  *:focus {
+    outline: none;
+  }
+}
+
+// Disable iOS callouts when draggable is false
+[draggable="false"] {
+  -webkit-touch-callout: none;
+  -webkit-user-select: none;
+}