// Flexible grid
@function flex-grid($columns, $container-columns: $fg-max-columns) {
  $width: $columns * $fg-column + ($columns - 1) * $fg-gutter;
  $container-width: $container-columns * $fg-column + ($container-columns - 1) * $fg-gutter;
  @return percentage($width / $container-width);
}

// Flexible grid gutter
@function flex-gutter($container-columns: $fg-max-columns, $gutter: $fg-gutter) {
  $container-width: $container-columns * $fg-column + ($container-columns - 1) * $fg-gutter;
  @return percentage($gutter / $container-width);
}
// Percentage of container calculator
@function perc($width, $container-width: $max-width) {
  @return percentage($width / $container-width);
}

// Line-height
@function lh($amount: 1) {
  @return $body-line-height * $amount;
}

// Variables
// ---------------------------------------- //

// fonts
$body-font-family: "Open Sans", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Geneva, Verdana, sans-serif;;
$body-font-size: 14px;

// grid
$columns: 12;
$column-width: 80px;
$gutter-width: 25px;
$max-width: ($columns * $column-width) + (($columns - 1) * $gutter-width);

$gw-column: perc($column-width);
$gw-gutter: perc($gutter-width);
$body-line-height: golden-ratio($body-font-size, 1);

//Flexible grid
$fg-column: $column-width;
$fg-gutter: $gutter-width;
$fg-max-columns: $columns;
$fg-max-width: 1400px;
$fg-min-width: 810px;

// color
$light-gray: #ddd;
$dark-gray: #333;
$mit-red: #993333;

$text-color: $dark-gray;
$border-color: $light-gray;