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              <section class="grid clear">
  <div class="col-tiny-6 col-large-4">a</div>
  <div class="col-tiny-6 col-large-8">b</div>

<section class="grid clear">
  <div class="col-small-4 col-large-2">a</div>
  <div class="col-small-4 col-large-5">b</div>
  <div class="col-small-4 col-large-5">c</div>

<section class="grid clear">
  <div class="col-tiny-3 col-large-2">a</div>
  <div class="col-tiny-3 col-large-2">b</div>
  <div class="col-tiny-3 col-large-4 col-nation-4">c</div>
  <div class="col-tiny-3 col-large-4 col-nation-4">d</div>

<section class="grid clear">
  <div class="col-tiny-6 col-galaxy-3">a</div>
  <div class="col-tiny-6 col-galaxy-3">b</div>
  <div class="col-tiny-4 col-galaxy-2">c</div>
  <div class="col-tiny-4 col-galaxy-2">d</div>
  <div class="col-tiny-4 col-galaxy-2">e</div>

<section class="clear">
  <div class="col-tiny-flush-4">a</div>
  <div class="col-tiny-flush-4">b</div>
  <div class="col-tiny-flush-4">c</div>

              // ================
// Variables
// ================

// Number of columns the grid is based off of
$column-base: 12;

// Half the space between each column
// Defines the bottom margin of each column
$column-between: 1%;

// Do you need to utilize the default feature of this grid system?
$column-default-desired: true;

// Do you need to utilize the flush feature of this grid system?
$column-flush-desired: true;

// Do you need to utilize the push feature of this grid system?
$column-push-desired: false;

// Create a sass map to store breakpoint aliases & respective values
$breakpoints: (
  'tiny': 400px,
  'small': 500px,
  'medium': 600px,
  'big': 700px,
  'large': 800px,
  'huge': 900px,
  'nation': 1000px

// ================
// Property Dependency
// ================

// !: The grid will break without this
// !: Make sure this property is at least being applied to your grid and columns
* {
  box-sizing: border-box;

// ================
// Clear
// ================

.clear {
  &:after {
    clear: both;
    display: table;
    content: '';

// ================
// Grid
// ================

// 1: All grids have their right and left margins pulled outward by default
// 1: This ensures that the columns inside will be flush with the grid container
.grid {
  display: flex;
  flex-wrap: wrap;
  margin-right: $column-between * -1;
  margin-left: $column-between * -1;

// ================
// Columns
// ================

// 1: All columns must begin with the class of 'col' within your markup
// 1: If the dependency on that class string is low, you may change the '^' filter to '*'

// 2: Or change this to a generic class rather than a filtered selector
// 2: All columns are float left by default
// 2: This reduces the amount of float declarations and media queries without sacrificing integrity

// 3: All columns have right and left margins pushed inward by default
// 3: This reduces the amount of margin declarations and media queries without sacrificing integrity
// 3: The grid container will stretch these back out so that each column will appear full width by default
[class^='col-'] {
  float: left;
  margin: 0 $column-between $column-between * 2;
  width: 100% - $column-between * 2;

[class*='flush'] {
  margin-right: 0;
  margin-left: 0;
  width: 100%;

// Iterates through a loop given the amount of breakpoints with $breakpoints
// Example class output: .col-small-4, .col-large-push-4, .col-nation-pull-4
@for $i from 1 to length($breakpoints) + 1 {

  // Iterates through each breakpoint within $breakpoints
  @media (min-width: nth(nth($breakpoints, $i), 2)) {

    @for $x from 1 to $column-base {
      @if $column-default-desired {

        // Given the index of this loop, how many columns does that take up?
        .col-#{nth(nth($breakpoints, $i), 1)}-#{$x} {
          width: 100% / $column-base * $x - $column-between * 2;
      // Create 'flush' classes *if* $column-flush-desired is set to true
      @if $column-flush-desired {
        .col-#{nth(nth($breakpoints, $i), 1)}-flush-#{$x} {
          width: 100% / $column-base * $x;
      // Create 'push' classes *if* $column-push-desired is set to true
      @if $column-push-desired {
        // Push classes push a column x number of columns on it's left
        // Given the index of this loop, how many columns does this push on the left?
        .col-#{nth(nth($breakpoints, $i), 1)}-push-#{$x} {
          margin-left: 100% / $column-base * $x + $column-between;



// ================
// Visuals @u@
// ================

body {
  padding: $column-between * 2;

  [class^='col'] {
    padding: 1.25em;
    background: #6ecdc7;
    color: #fff;
    @at-root .grid:nth-of-type(odd) [class^='col'] {
      background: darken(#6ecdc7, 20%);

  .flex-item {
    padding: 1.25em;
    background: #000;
    color: #fff;
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