$font-family: Helvetica, Arial, sans-serif !default;

$main-font-color: #000;

$code-listing-background-color: rgba($main-font-color, 0.03);
$code-listing-border-color: lighten($main-font-color, 70);

$primary-color: lightblue !default;
$primary-dark-color: $primary-color !default;
$accent-color: red !default;

$warning-color: red !default;
$important-color: orange !default;

$main-background: linear-gradient(315deg, $accent-color 0%, $primary-color 74%) !default;
$header-background: $main-background !default;

$hub-software--primary-color: lightsalmon !default;
$hub-software--primary-dark-color: tomato !default;
$hub-software--hero-background: $hub-software--primary-dark-color !default;

$hub-specs--primary-color: lightpink !default;
$hub-specs--primary-dark-color: palevioletred !default;
$hub-specs--hero-background: $hub-specs--primary-dark-color !default;

$gutter: 15px;
$featured-cols: 3;
$featured-cols-narrow: 2;
$grid-cols: 3;

$widescreen-breakpoint: 1140px + $gutter * 2;
$bigscreen-breakpoint: 900px + $gutter * 2;

$external-links-side-margin: 16px;  // for external links


@import "open-project-base";
@import "open-project-header-footer";
@import "headroom";


main {

  /* Generic */

  .layout--home > & {
    padding-bottom: 2em;

    > .featured-posts {
      @extend .main-section;

      .items {
        @extend .item-grid;
        justify-content: center;
      }

      .item {
        @extend .item-card;
        @extend .post-card;
        @include hoverable-card(4px, 12px, rgba(0, 0, 0, 0.08));

        padding: 32px 30px;
        box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.08);

        .header {
          font-size: 22px;
        }

        .body, .meta {
          font-size: 15px;
        }

        @media screen and (min-width: $bigscreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols-narrow} - #{$gutter} );

          // Hide third element (there’re at most 3)
          &:nth-child(3) {
            opacity: 0;
            display: none;
          }
        }

        @media screen and (min-width: $widescreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols} - #{$gutter} );

          // Show third element
          &:nth-child(3) {
            opacity: 1;
            display: block;
          }
        }
      }
    }
  }

  .layout--spec-index > &,
  .layout--software-index > &,
  .layout--blog-index > &,
  .layout--product > &,
  .layout--post > &,
  .layout--spec > &,
  .layout--project-index > &,
  .docs-page > & {
    padding-bottom: 50px;

    @media screen and (min-width: $bigscreen-breakpoint) {
      padding-bottom: 100px;
    }
  }

  .layout--home > & {
    padding-bottom: 50px;
  }

  .layout--spec-index > &,
  .layout--software-index > & {
    > .filter-header {
      // Shown when a tag is selected.
      background-color: #fafafa;
      font-size: 80%;
      box-shadow: 0 4px 40px -14px rgba(0, 0, 0, 0.4);
      border-radius: .5em;
      margin-top: -.5em;

      .title {
        font-weight: normal;
        text-align: center;

        .tag {
          white-space: nowrap;
          font-weight: bold;

          .namespace {
            font-weight: normal;
          }

          &:before { content: "“"; font-weight: normal; }
          &:after { content: "”"; font-weight: normal; }
        }
        a.show-all {
          white-space: nowrap;
        }
      }
    }
    > .item-filter {
      padding: 18px 2em;
      background-color: #F3F3F3;
      align-self: stretch;
      text-align: left;

      .namespace, ul.tags {
        font-size: 14px;
      }

      .namespace {
        display: flex;
        flex-flow: row nowrap;
        align-items: flex-start;
        margin-top: .5em;

        .namespace-title {
          margin-right: 14px;
        }

        &.empty {
          display: none;
        }

        &:first-child {
          margin-top: 0;
        }
      }

      ul.tags {
        flex: 1;

        list-style: none;
        margin: 0;
        padding: 0;

        white-space: nowrap;
        overflow-x: scroll;
        overflow-y: hidden;

        text-overflow: ellipsis;

        > li {
          display: inline;
          margin: 0;
          padding: 0;

          > * {
            font-weight: 700;
            margin: 0 4px;
            padding: 3px 10px 3px 10px;
            white-space: nowrap;

            &:first-child {
              margin-left: -10px;
            }
          }
          > a {
            color: grey;
          }
        }

        &.scrolled {
          text-overflow: unset;
        }
      }
    }
  }
  // Item filter: color override for selected tags
  > .item-filter ul.tags li > span {
    .layout--software-index > & {
      color: $hub-software--primary-dark-color;
      background-color: rgba($hub-software--primary-color, 0.1);
    }
    .layout--spec-index > & {
      color: $hub-specs--primary-dark-color;
      background-color: rgba($hub-specs--primary-color, 0.1);
    }
  }

  .layout--blog-index > & {
    > .items {
      @extend .item-grid;
      @extend .index-item-grid;

      .item {
        @extend .item-card;
        @extend .post-card;
        @include hoverable-card(4px, 12px, rgba(0, 0, 0, 0.08));

        padding: 32px 30px;

        .header {
          font-size: 22px;
        }
        .body {
          font-size: 15px;
        }

        @media screen and (min-width: $bigscreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols-narrow} - #{$gutter} );
          margin-bottom: $gutter;
        }
        @media screen and (min-width: $widescreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols} - #{$gutter} );
          margin-bottom: $gutter;
        }
      }
    }

    > .items.one-row {
      justify-content: center;
    }
  }

  .layout--post > & {
    > article {
      @extend .main-article;

      > header {
        > .title {
          margin-bottom: 14px;
        }
        > .meta {
          @extend .post-meta-row;
          margin-bottom: 36px;
        }
      }
      aside.social-links {
        position: relative;
        top: -10px;
        margin-bottom: 14px;

        .ico-ext {
          display: none;
        }

        @media screen and (min-width: $bigscreen-breakpoint) {
          // "Remove" from the flow, and offset to the left
          $height: 100px;

          height: $height;
          width: 80px;

          margin-bottom: -$height;

          top: 10px;
          left: -140px;

          display: flex;
          flex-flow: column nowrap;
          align-items: flex-start;
        }

        > .ico {
          margin-right: 5px;

          @media screen and (min-width: $bigscreen-breakpoint) {
            margin-right: 0;
            margin-bottom: 5px;
          }

          .fa-layers {
            > .fa-circle {
              color: $primary-color;
            }
            > :not(.fa-circle) {
              color: white;
            }
          }
        }
      }
    }
  }
}


/* Hub */

.site--hub {

  &.layout--home > main {
    > .featured-projects {
      @extend .main-section;

      > .title:after {
        border-bottom-color: rgba($primary-dark-color, 0.12);
      }

      .items {
        @extend .item-grid;
        justify-content: center;
      }

      .item {
        @extend .item-card;
        @include hoverable-card(4px, 16px, rgba(0, 0, 0, 0.12));

        padding: 40px 32px;
        text-align: center;

        .logo {
          display: inline-block;
          height: 80px;
          width: 80px;

          // Without this, some items’ logos don’t conform to above dimensions
          overflow: hidden;
        }

        header > .title {
          font-size: 24px;
          margin: 0;
        }

        .body {
          font-size: 16px;
          padding-bottom: 20px;
          overflow: hidden;
          text-overflow: ellipsis;

          @media screen and (min-width: $bigscreen-breakpoint) {
            height: 100px;
            padding-bottom: 0;
          }
        }

        .cta-view-project {
          text-align: center;

          .button {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 700;
            color: white;
            background-color: $accent-color;
          }
        }

        @media screen and (min-width: $bigscreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols} - #{$gutter} );
        }
      }
    }
    > .other-projects {
      @extend .main-section;
      @extend .with-symbol-background;

      .items {
        @extend .item-grid;
      }

      > .title:after {
        border-bottom-color: rgba($primary-color, 0.12);
      }
    }
  }

  &.layout--software-index > main,
  &.layout--spec-index > main {
    > .items {
      @extend .item-grid;
      @extend .index-item-grid;

      .item {
        @extend .item-card;
        @include hoverable-card(4px, 12px, rgba(0, 0, 0, 0.08));

        padding: 16px 30px 22px 30px;

        .header {
          font-size: 18px;
        }
        .body {
          font-size: 15px;
        }

        @media screen and (min-width: $bigscreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$grid-cols} - #{$gutter} );
          margin-bottom: $gutter;
        }
      }
    }
  }

  &.layout--project-index > main {
    .items {
      @extend .item-grid;
      @extend .index-item-grid;
    }
  }

  &.layout--project-index > main,
  &.layout--blog-index > main,
  &.layout--software-index > main,
  &.layout--spec-index > main {
    > .items {
      @extend .with-symbol-background;
    }
  }

  &.layout--home > main > .other-projects,
  &.layout--project-index > main {
    .items.one-row {
      justify-content: center;
    }

    .item {
      @extend .item-card;
      @include hoverable-card(2px, 10px, rgba(desaturate($primary-color, 50), 0.08));

      padding: 32px 30px;
      text-align: center;

      .logo {
        display: inline-block;
        height: 60px;
        width: 60px;
      }

      header > .title {
        font-size: 18px;
        margin: 0;
      }

      .body {
        font-size: 15px;
      }

      @media screen and (min-width: $bigscreen-breakpoint) {
        box-sizing: border-box;
        flex-basis: calc( 100%/#{$featured-cols} - #{$gutter} );
      }
    }
  }
}


/* Project */

body.site--project {
  &.layout--home {
    background: $main-background;
  }

  &.layout--home > main {
    .item {
      background: linear-gradient(120deg, white 20%, rgba(white, 0.9) 80%, rgba(white, 0.75) 100%);

      display: flex;
      flex-flow: column nowrap;
      padding: 1em 1.5em;

      .body {
        flex: 1;
      }

      .title {
        font-size: 24px;
        font-weight: normal;
      }

      .docs-nav {
        flex-basis: 100%;
        margin-bottom: 1em;
        @include item-nav-toc();
      }

      .external-links {
        @include item-external-links();
        margin-left: -1.5em;
        margin-right: -1.5em;

        .nav-items {
          display: flex;
          flex-direction: row;
          flex-wrap: wrap-reverse;

          a {
            white-space: nowrap;
          }
        }
      }
    }

    > .custom-intro {
      .summary {
        font-size: 20px;
        color: #fefefe;

        .cta {
          margin-top: 30px;
          .button {
            @include cta-button($primary-dark-color, white);
            border-radius: 25px;
            border: 1px solid $primary-color;
          }
        }
        p:first-child:first-letter {
          color: $accent-color;
          float: left;
          font-size: 75px;
          line-height: 60px;
          padding-right: 8px;
          margin-left: -5px;
        }
        @media screen and (min-width: $bigscreen-breakpoint) {
          p:first-child {
            padding-right: 20vw;
          }
        }
      }
    }
  }

  &.site--project--one-software.layout--home > main {
    // On single-software project sites, the only software item on landing
    // is made part of the page rather than being constrained to a card widget.
    // No own background means it’ll appear on landing page’s overall dark background.

    .custom-intro {
      .summary {
        a {
          @include static-link-color(white);
        }
      }
    }

    .item {
      background: none;
      padding: 0;

      .docs-nav {
        ul.nav-items > li {
          > .item-title {
            font-size: 24px;

            a {
              @include static-link-color(white);
            }
          }
        }
      }
      .external-links {
        @include item-external-links(true);
        margin-left: 0;
        margin-right: 0;
      }
    }
  }

  &.layout--home > main > .software,
  &.layout--home > main > .specs,
  &.layout--software-index > main,
  &.layout--spec-index > main {
    > .items {
      > hr {
        // Separates featured items, listed initially, from the rest
        width: 10em;
        margin: 40px auto;
        border-style: solid;
        border-color: $primary-color;
        background-color: $primary-color;
        color: $primary-color;
        box-shadow: 2px 2px 0 3px $primary-color;
      }

      .item {
        flex: 1;
        text-align: left;

        header > .title {
          margin: 0;
        }
        .body {
          font-size: 16px;
        }
      }
    }
  }

  &.layout--software-index > main,
  &.layout--spec-index > main {
    > .items .item {
      @extend .item-card;
      @include hoverable-card(2px, 10px, rgba(desaturate($primary-color, 50), 0.08));

      padding: 30px 32px;
      flex: unset;
    }
  }

  &.layout--home > main > .software {
    > .items {
      .item {
        $logo-space: 64px;
        $logo-side: 32px;

        header {
          display: flex;
          flex-flow: row nowrap;
          align-items: center;

          .title {
            flex: 1;
          }
          .logo-container {
            width: $logo-space;
            flex: 0;
            padding: 4px ($logo-space - $logo-side) 4px 0;

            .logo > :only-child {
              width: $logo-side;
              height: $logo-side;
              vertical-align: middle;
            }
          }
        }
      }
    }
  }

  &.layout--software-index > main {
    > .items {
      .item {
        $logo-space: 132px;
        $logo-side: 48px;

        .logo-container {
          .logo > :only-child {
            width: $logo-side;
            height: $logo-side;
          }
        }

        @media screen and (min-width: $bigscreen-breakpoint) {
          padding-left: $logo-space;

          .logo-container {
            float: left;
            margin-left: -$logo-space;
            padding: 8px (($logo-space - $logo-side) / 2);
          }
        }
      }
    }
  }

  &.layout--home > main > .software,
  &.layout--home > main > .specs {
    @extend .main-section;

    > .title {
      padding: .4em 1.5em;
      background: rgba(white, 0.9);
      font-size: 110%;
      font-weight: normal;
      align-self: flex-start;
      color: lighten($main-font-color, 20);
      margin-bottom: $gutter;

      a {
        @include static-link-color($primary-dark-color);
      }
    }

    .items {
      @extend .item-grid;
      justify-content: center;

      > .item {
        @media screen and (min-width: $bigscreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols-narrow} - #{$gutter} );

          // Hide third element (there’re at most 3)
          &:nth-child(3) {
            opacity: 0;
            display: none;
          }
        }

        @media screen and (min-width: $widescreen-breakpoint) {
          box-sizing: border-box;
          flex-basis: calc( 100%/#{$featured-cols} - #{$gutter} );

          // Show third element
          &:nth-child(3) {
            opacity: 1;
            display: flex;
          }
        }
      }
    }
  }

  &.layout--software-index > main,
  &.layout--spec-index > main {
    > .items {
      @extend .index-item-grid;
    }
  }

  &.layout--spec > main > article {
    @extend .main-article;
  }
  &.docs-page > main {
    @include docs-page($primary-dark-color);
  }
}