basspistol.com/_sass/components/_items.scss

///
/// Story by HTML5 UP
/// html5up.net | @ajlkn
/// Free for personal and commercial use under the CCA 3.0 license (html5up.net/license)
///

/* Items (transitions) */

	.items {

		// Mixin.
			@mixin transition-items($event) {
				$x: null;
				$y: null;

				@if ($event == 'load') {
					$x: 'body.is-preload &';
					$y: _duration(on-load);
				}
				@else if ($event == 'scroll') {
					$x: '&.is-inactive';
					$y: _duration(on-scroll);
				}

				&.on#{$event}-fade-in {
					> * {
						> .inner {
							@include vendor('transition', 'opacity #{$y} ease-in-out');
							@include vendor('transition-delay', '#{_misc(items-limit) * _duration(items-delay)}');
						}

						@for $i from 0 through _misc(items-limit) {
							&:nth-child(#{$i + 1}) {
								> .inner {
									@include vendor('transition-delay', '#{$i * _duration(items-delay)}');
								}
							}
						}
					}

					#{$x} {
						> * {
							> .inner {
								opacity: 0;
							}
						}
					}
				}
			}

		// On Load.
			@include transition-items('load');

		// On Scroll.
			@include transition-items('scroll');

	}

/* Items (style1) */

	@mixin items-style1-size($name, $size, $padding) {
		&.#{$name} {
			> * {
				@include padding($padding, $padding);
				width: #{100% / $size};

				&:nth-child(-n + #{$size}) {
					border-top-width: 0;
				}

				&:nth-child(#{$size}n + 1) {
					border-left-width: 0;
				}
			}
		}
	}

	@mixin items-style1-size-reset($name, $size) {
		&.#{$name} {
			> * {
				&:nth-child(-n + #{$size}) {
					border-top-width: _size(border-width);
				}

				&:nth-child(#{$size}n + 1) {
					border-left-width: _size(border-width);
				}
			}
		}
	}

	.items.style1 {
		@include vendor('display', 'flex');
		@include vendor('flex-wrap', 'wrap');
		@include vendor('justify-content', 'center');
		margin: (_size(element-margin) * 1.5) 0;
		position: relative;

		> * {
			@include vendor('flex-grow', '0');
			@include vendor('flex-shrink', '0');
			border-style: solid;
			border-left-width: _size(border-width);
			border-top-width: _size(border-width);
		}

		// Modifiers.

			// Size.
				@include items-style1-size(big, 2, _size(gutter));
				@include items-style1-size(medium, 3, _size(gutter) * 0.625);
				@include items-style1-size(small, 4, _size(gutter) * 0.375);

				@include breakpoint('<=large') {
					@include items-style1-size-reset(small, 4);
					@include items-style1-size(small, 3, _size(gutter) * 0.625);
				}

				@include breakpoint('<=medium') {
					@include items-style1-size-reset(medium, 3);
					@include items-style1-size(medium, 2, _size(gutter));

					@include items-style1-size-reset(small, 3);
					@include items-style1-size(small, 2, _size(gutter));
				}

				@include breakpoint('<=xsmall') {
					@include items-style1-size-reset(big, 2);
					@include items-style1-size(big, 1, _size(gutter) * 0.75);

					@include items-style1-size-reset(medium, 2);
					@include items-style1-size(medium, 1, _size(gutter) * 0.75);

					@include items-style1-size-reset(small, 2);
					@include items-style1-size(small, 1, _size(gutter) * 0.75);

					&.big,
					&.medium,
					&.small {
						> * {
							padding-left: 0;
							padding-right: 0;
						}

						> :first-child {
							padding-top: 0;
						}

						> :last-child {
							padding-bottom: 0;

							> .inner {
								> :last-child {
									margin-bottom: 0;
								}
							}
						}
					}
				}

	}

/* Items (style2) */

	@mixin items-style2-size($name, $size, $padding) {
		&.#{$name} {
			> * {
				@include padding($padding, $padding);
				width: #{100% / $size};

				&:nth-child(-n + #{$size}) {
					border-top-width: 0;
				}

				&:nth-child(#{$size}n + 1) {
					border-left-width: 0;
				}
			}
		}
	}

	@mixin items-style2-size-reset($name, $size) {
		&.#{$name} {
			> * {
				&:nth-child(-n + #{$size}) {
					border-top-width: _size(border-width);
				}

				&:nth-child(#{$size}n + 1) {
					border-left-width: _size(border-width);
				}
			}
		}
	}

	.items.style2 {
		@include vendor('display', 'flex');
		@include vendor('flex-wrap', 'wrap');
		@include vendor('justify-content', 'center');
		margin: (_size(element-margin) * 1.5) 0;
		position: relative;
		border: solid _size(border-width);
		border-radius: _size(border-radius);

		> * {
			@include vendor('flex-grow', '0');
			@include vendor('flex-shrink', '0');
			border-style: solid;
			border-left-width: _size(border-width);
			border-top-width: _size(border-width);
		}

		// Modifiers.

			// Size.
				@include items-style2-size(big, 2, _size(gutter));
				@include items-style2-size(medium, 3, _size(gutter) * 0.625);
				@include items-style2-size(small, 4, _size(gutter) * 0.375);

				@include breakpoint('<=large') {
					@include items-style2-size-reset(small, 4);
					@include items-style2-size(small, 3, _size(gutter) * 0.625);
				}

				@include breakpoint('<=medium') {
					@include items-style2-size-reset(medium, 3);
					@include items-style2-size(medium, 2, _size(gutter));

					@include items-style2-size-reset(small, 3);
					@include items-style2-size(small, 2, _size(gutter));
				}

				@include breakpoint('<=xsmall') {
					@include items-style2-size-reset(big, 2);
					@include items-style2-size(big, 1, _size(gutter) * 0.75);

					@include items-style2-size-reset(medium, 2);
					@include items-style2-size(medium, 1, _size(gutter) * 0.75);

					@include items-style2-size-reset(small, 2);
					@include items-style2-size(small, 1, _size(gutter) * 0.75);
				}

	}

/* Items (style3) */

	@mixin items-style3-size($name, $size, $padding) {
		&.#{$name} {
			> * {
				@include padding($padding, $padding);
				width: #{100% / $size};
			}
		}
	}

	.items.style3 {
		@include vendor('display', 'flex');
		@include vendor('flex-wrap', 'wrap');
		@include vendor('justify-content', 'center');
		margin: (_size(element-margin) * 1.5) 0;
		position: relative;

		> * {
			@include vendor('flex-grow', '0');
			@include vendor('flex-shrink', '0');
		}

		// Modifiers.

			// Size.
				@include items-style3-size(big, 2, _size(gutter) * 0.5);
				@include items-style3-size(medium, 3, _size(gutter) * 0.5 * 0.625);
				@include items-style3-size(small, 4, _size(gutter) * 0.5 * 0.375);

				@include breakpoint('<=large') {
					@include items-style3-size(small, 3, _size(gutter) * 0.5 * 0.625);
				}

				@include breakpoint('<=medium') {
					@include items-style3-size(medium, 2, _size(gutter) * 0.5);
					@include items-style3-size(small, 2, _size(gutter) * 0.5);
				}

				@include breakpoint('<=small') {
					margin: _size(element-margin) 0;
				}

				@include breakpoint('<=xsmall') {
					@include items-style3-size(big, 1, _size(gutter) * 0.5 * 0.75);
					@include items-style3-size(medium, 1, _size(gutter) * 0.5 * 0.75);
					@include items-style3-size(small, 1, _size(gutter) * 0.5 * 0.75);

					&.big,
					&.medium,
					&.small {
						> * {
							padding-left: 0;
							padding-right: 0;
						}

						> :first-child {
							padding-top: 0;
						}

						> :last-child {
							padding-bottom: 0;

							> .inner {
								> :last-child {
									margin-bottom: 0;
								}
							}
						}
					}
				}

	}

// Mixin

	@mixin color-items($p: null) {
 		.items.style1 {
 			> * {
	 			border-color: _palette($p, #fff);
	 		}
 		}

 		.items.style2 {
 			border-color: _palette($p, border);

 			> * {
	 			border-color: _palette($p, border);
	 		}
 		}
	}

	@include color-items;