Add missed files

assets/sass/libs/_breakpoints.scss

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+// breakpoints.scss v1.0 | @ajlkn | MIT licensed */
+
+// Vars.
+
+	/// Breakpoints.
+	/// @var {list}
+	$breakpoints: () !global;
+
+// Mixins.
+
+	/// Sets breakpoints.
+	/// @param {map} $x Breakpoints.
+	@mixin breakpoints($x: ()) {
+		$breakpoints: $x !global;
+	}
+
+	/// Wraps @content in a @media block targeting a specific orientation.
+	/// @param {string} $orientation Orientation.
+	@mixin orientation($orientation) {
+		@media screen and (orientation: #{$orientation}) {
+			@content;
+		}
+	}
+
+	/// Wraps @content in a @media block using a given query.
+	/// @param {string} $query Query.
+	@mixin breakpoint($query: null) {
+
+		$breakpoint: null;
+		$op: null;
+		$media: null;
+
+		// Determine operator, breakpoint.
+
+			// Greater than or equal.
+				@if (str-slice($query, 0, 2) == '>=') {
+
+					$op: 'gte';
+					$breakpoint: str-slice($query, 3);
+
+				}
+
+			// Less than or equal.
+				@elseif (str-slice($query, 0, 2) == '<=') {
+
+					$op: 'lte';
+					$breakpoint: str-slice($query, 3);
+
+				}
+
+			// Greater than.
+				@elseif (str-slice($query, 0, 1) == '>') {
+
+					$op: 'gt';
+					$breakpoint: str-slice($query, 2);
+
+				}
+
+			// Less than.
+				@elseif (str-slice($query, 0, 1) == '<') {
+
+					$op: 'lt';
+					$breakpoint: str-slice($query, 2);
+
+				}
+
+			// Not.
+				@elseif (str-slice($query, 0, 1) == '!') {
+
+					$op: 'not';
+					$breakpoint: str-slice($query, 2);
+
+				}
+
+			// Equal.
+				@else {
+
+					$op: 'eq';
+					$breakpoint: $query;
+
+				}
+
+		// Build media.
+			@if ($breakpoint and map-has-key($breakpoints, $breakpoint)) {
+
+				$a: map-get($breakpoints, $breakpoint);
+
+				// Range.
+					@if (type-of($a) == 'list') {
+
+						$x: nth($a, 1);
+						$y: nth($a, 2);
+
+						// Max only.
+							@if ($x == null) {
+
+								// Greater than or equal (>= 0 / anything)
+									@if ($op == 'gte') {
+										$media: 'screen';
+									}
+
+								// Less than or equal (<= y)
+									@elseif ($op == 'lte') {
+										$media: 'screen and (max-width: ' + $y + ')';
+									}
+
+								// Greater than (> y)
+									@elseif ($op == 'gt') {
+										$media: 'screen and (min-width: ' + ($y + 1) + ')';
+									}
+
+								// Less than (< 0 / invalid)
+									@elseif ($op == 'lt') {
+										$media: 'screen and (max-width: -1px)';
+									}
+
+								// Not (> y)
+									@elseif ($op == 'not') {
+										$media: 'screen and (min-width: ' + ($y + 1) + ')';
+									}
+
+								// Equal (<= y)
+									@else {
+										$media: 'screen and (max-width: ' + $y + ')';
+									}
+
+							}
+
+						// Min only.
+							@else if ($y == null) {
+
+								// Greater than or equal (>= x)
+									@if ($op == 'gte') {
+										$media: 'screen and (min-width: ' + $x + ')';
+									}
+
+								// Less than or equal (<= inf / anything)
+									@elseif ($op == 'lte') {
+										$media: 'screen';
+									}
+
+								// Greater than (> inf / invalid)
+									@elseif ($op == 'gt') {
+										$media: 'screen and (max-width: -1px)';
+									}
+
+								// Less than (< x)
+									@elseif ($op == 'lt') {
+										$media: 'screen and (max-width: ' + ($x - 1) + ')';
+									}
+
+								// Not (< x)
+									@elseif ($op == 'not') {
+										$media: 'screen and (max-width: ' + ($x - 1) + ')';
+									}
+
+								// Equal (>= x)
+									@else {
+										$media: 'screen and (min-width: ' + $x + ')';
+									}
+
+							}
+
+						// Min and max.
+							@else {
+
+								// Greater than or equal (>= x)
+									@if ($op == 'gte') {
+										$media: 'screen and (min-width: ' + $x + ')';
+									}
+
+								// Less than or equal (<= y)
+									@elseif ($op == 'lte') {
+										$media: 'screen and (max-width: ' + $y + ')';
+									}
+
+								// Greater than (> y)
+									@elseif ($op == 'gt') {
+										$media: 'screen and (min-width: ' + ($y + 1) + ')';
+									}
+
+								// Less than (< x)
+									@elseif ($op == 'lt') {
+										$media: 'screen and (max-width: ' + ($x - 1) + ')';
+									}
+
+								// Not (< x and > y)
+									@elseif ($op == 'not') {
+										$media: 'screen and (max-width: ' + ($x - 1) + '), screen and (min-width: ' + ($y + 1) + ')';
+									}
+
+								// Equal (>= x and <= y)
+									@else {
+										$media: 'screen and (min-width: ' + $x + ') and (max-width: ' + $y + ')';
+									}
+
+							}
+
+					}
+
+				// String.
+					@else {
+
+						// Missing a media type? Prefix with "screen".
+							@if (str-slice($a, 0, 1) == '(') {
+								$media: 'screen and ' + $a;
+							}
+
+						// Otherwise, use as-is.
+							@else {
+								$media: $a;
+							}
+
+					}
+
+			}
+
+		// Output.
+	        @media #{$media} {
+				@content;
+			}
+
+	}

assets/sass/libs/_html-grid.scss

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+// html-grid.scss v1.0 | @ajlkn | MIT licensed */
+
+// Mixins.
+
+	/// Initializes the current element as an HTML grid.
+	/// @param {mixed} $gutters Gutters (either a single number to set both column/row gutters, or a list to set them individually).
+	/// @param {mixed} $suffix Column class suffix (optional; either a single suffix or a list).
+	@mixin html-grid($gutters: 1.5em, $suffix: '') {
+
+		// Initialize.
+			$cols: 12;
+			$multipliers: 0, 0.25, 0.5, 1, 1.50, 2.00;
+			$unit: 100% / $cols;
+
+			// Suffixes.
+				$suffixes: null;
+
+				@if (type-of($suffix) == 'list') {
+					$suffixes: $suffix;
+				}
+				@else {
+					$suffixes: ($suffix);
+				}
+
+			// Gutters.
+				$guttersCols: null;
+				$guttersRows: null;
+
+				@if (type-of($gutters) == 'list') {
+
+					$guttersCols: nth($gutters, 1);
+					$guttersRows: nth($gutters, 2);
+
+				}
+				@else {
+
+					$guttersCols: $gutters;
+					$guttersRows: 0;
+
+				}
+
+		// Row.
+			display: flex;
+			flex-wrap: wrap;
+			box-sizing: border-box;
+			align-items: stretch;
+
+			// Columns.
+				> * {
+					box-sizing: border-box;
+				}
+
+			// Gutters.
+				&.gtr-uniform {
+					> * {
+						> :last-child {
+							margin-bottom: 0;
+						}
+					}
+				}
+
+			// Alignment.
+				&.aln-left {
+					justify-content: flex-start;
+				}
+
+				&.aln-center {
+					justify-content: center;
+				}
+
+				&.aln-right {
+					justify-content: flex-end;
+				}
+
+				&.aln-top {
+					align-items: flex-start;
+				}
+
+				&.aln-middle {
+					align-items: center;
+				}
+
+				&.aln-bottom {
+					align-items: flex-end;
+				}
+
+		// Step through suffixes.
+			@each $suffix in $suffixes {
+
+				// Suffix.
+					@if ($suffix != '') {
+						$suffix: '-' + $suffix;
+					}
+					@else {
+						$suffix: '';
+					}
+
+				// Row.
+
+					// Important.
+						> .imp#{$suffix} {
+							order: -1;
+						}
+
+					// Columns, offsets.
+						@for $i from 1 through $cols {
+							> .col-#{$i}#{$suffix} {
+								width: $unit * $i;
+							}
+
+							> .off-#{$i}#{$suffix} {
+								margin-left: $unit * $i;
+							}
+						}
+
+					// Step through multipliers.
+						@each $multiplier in $multipliers {
+
+							// Gutters.
+								$class: null;
+
+								@if ($multiplier != 1) {
+									$class: '.gtr-' + ($multiplier * 100);
+								}
+
+								&#{$class} {
+									margin-top: ($guttersRows * $multiplier * -1);
+									margin-left: ($guttersCols * $multiplier * -1);
+
+									> * {
+										padding: ($guttersRows * $multiplier) 0 0 ($guttersCols * $multiplier);
+									}
+
+									// Uniform.
+										&.gtr-uniform {
+											margin-top: $guttersCols * $multiplier * -1;
+
+											> * {
+												padding-top: $guttersCols * $multiplier;
+											}
+										}
+
+								}
+
+						}
+
+			}
+
+	}