blog/_sass/yat/_layout.scss

/**
 * Animation for transparent header
 */
html {
  &[data-header-transparent] {
    header.site-header {
      position: fixed;
    }
  }

  &[data-scroll-status='top'] {
    header.site-header-transparent {
      height: 0;

      &.site-header {
        text-shadow: 0 0 2px #505050a0;
      }
    }

    footer.site-footer {
      color: #888;
      background-color: transparent;

      .site-footer-inner {
        border-top: solid 1px #eee;
      }
    }
  }

  &[data-scroll-status='down'] {
    header.site-header {
      top: -$header-height;
    }

    .framework .sidebar {
      top: 20px;
    }
  }
}

/**
 * Site header
 */
.site-header {
  background-color: $header-background-color;
  height: $header-height;
  width: 100%;
  transition: height 0.2s, text-shadow 0.2s, top 0.2s;

  // Positioning context for the mobile navigation icon
  @include flex-sticky(0);
  z-index: 1000;

  a {
    text-decoration: none;
  }

  .site-header-inner {
    position: relative;
  }
}

.site-brand {
  line-height: $header-height;
  margin-right: 50px;

  .site-brand-inner {
    @include relative-font-size(1.125);
    font-weight: $base-font-weight;
    letter-spacing: -1px;
    transition: filter 0.2s;

    &, &:visited {
      color: $header-text-color;
    }

    &:hover {
      filter: drop-shadow(0 0 2px #08080880);
    }

    .site-favicon {
      display: inline-block;
      height: $header-height / 1.5;
      margin-right: 5px;
    }
  }
}

.site-nav {
  @include relative-font-size(1.025);
  line-height: $header-height;
  position: absolute;
  right: 0;
  top: 0;

  .nav-trigger {
    display: none;
  }

  .menu-icon {
    display: none;
  }

  .page-link {
    color: $header-text-color;
    line-height: $base-line-height;

    // Gaps between nav items, but not on the last one
    &:not(:last-child) {
      margin-right: 20px;
    }
  }

  @include media-query($on-palm) {
    position: absolute;
    top: 0;
    text-align: left;

    label[for="nav-trigger"] {
      display: block;
      z-index: 2;
      cursor: pointer;
    }

    .menu-icon {
      display: block;
      float: right;
      text-align: center;

      > svg {
        fill: $white-color;
      }
    }

    input ~ .trigger {
      clear: both;
      display: none;
    }

    input:checked ~ .trigger {
      display: block;
      background: $header-background-color;
    }

    .page-link {
      display: block;
      padding: 5px 10px;
      color: rgba($header-text-color, 80%);
      margin: 0 25px;
    }
  }
}

/**
 * Site footer
 */
.site-footer {
  @include relative-font-size(0.9);
  color: $footer-text-color;
  background-color: $footer-background-color;
  text-align: left;
  transition: background-color 0.2s;

  .site-footer-inner {
    transition: border-top 0.2s;
    padding: $spacing-unit * 0.8 0;
  }

  a {
    $a-color: invert(mix(invert($theme-color), #0030ae));
    color: $a-color;

    &:hover {
      color: lighten($a-color, 10%);
    }
  }
}

/**
 * Post header
 */
%post-header {
  .post-header {
    margin-bottom: $spacing-unit;
  }

  .post-title {
    @include relative-font-size(2.625);
    letter-spacing: -1px;
    line-height: 1;

    @include media-query($on-laptop) {
      @include relative-font-size(2.25);
    }
  }
}

/**
 * Page content
 */
.page-content {
  @extend %flex-1; /* <-- Keep footer on the bottom */
  padding: $spacing-unit * 1.5 0;
}

.page-heading {
  @include relative-font-size(2);
}

.post-list-heading {
  @include relative-font-size(1.75);
}

/**
 * Pagination page
 */
.pagination {
  .post-list {
    margin-left: 0;
    list-style: none;

    > li {
      margin-bottom: $spacing-unit;
    }
  }

  .post-meta {
    font-size: $small-font-size;
    color: $grey-color;
  }

  .post-link {
    @include relative-font-size(1.5);

    display: block;
    font-weight: $base-font-weight * 1.5;
  }
}


/**
 * Posts
 */
.post {
  @extend %post-header;

  .post-content {
    margin-bottom: $spacing-unit;

    h2 {
      @include relative-font-size(2);

      @include media-query($on-laptop) {
        @include relative-font-size(1.75);
      }
    }

    h3 {
      @include relative-font-size(1.625);

      @include media-query($on-laptop) {
        @include relative-font-size(1.375);
      }
    }

    h4 {
      @include relative-font-size(1.25);

      @include media-query($on-laptop) {
        @include relative-font-size(1.125);
      }
    }
  }
}


/**
 * Posts misc
 */
.post-nav {
  display: flex;
  justify-content: space-between;

  a {
    display: flex;
  }
}


/**
 * Archives page
 */
.page-archives {
  .page-archives-list {
    margin-left: 0;
    list-style: none;
  }

  .archives-time {
    @include relative-font-size(1.5);

    &:not(:first-child) {
      margin-top: 18px;
    }
    margin-bottom: 8px;
  }

  .post-meta {
    font-size: $small-font-size;
    color: $grey-color;
  }
}


/**
 * Page banner
 */
.page-banner {
  display: block;
  position: relative;
  height: $banner-height;
  background-color: $banner-background;
  transition: height 0.2s;

  .page-banner-img {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;

    & > *:first-child {
      @include center-image;
    }
  }

  .wrapper {
    height: 100%;
  }

  .page-banner-inner {
    @include vertical-center(relative);

    color: $banner-text-color;
    padding: 10px 5px;
    text-shadow: 1px 1px 2px #333;

    & > *:first-child {
      margin: 0;

      > :nth-child(1) {
        @include relative-font-size(2.825);
        letter-spacing: -1px;
        line-height: 1;
        margin-bottom: 10px;

        @include media-query($on-palm) {
          @include relative-font-size(2.425);
        }
      }

      > :nth-child(2) {
        font-weight: $base-font-weight * 1.5;
      }

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

  @include media-query($on-palm) {
    height: $banner-height / 1.5;
  }
}


/**
 * Layout and sidebar
 */
.framework {
    @extend %flex-layout;

  .main {
    @extend %flex-1;
  }

  .sidebar {
    padding-left: 8px;
    transition: top 0.2s, display 0.2s;

    @include flex-sticky($header-height + 20px);

    @include media-query($on-palm) {
      display: none;
    }

  }
}


/**
 * Segments page
 */
.page-segments {
  .page-segments-list {
    margin-left: 0;
    list-style: none;
  }

  .segment-name {
    font-weight: $base-font-weight * 1.5;
    margin-bottom: 8px;
    position: relative;

    @include relative-font-size(1.6);

    &:not(:first-child) {
      margin-top: 28px;
    }


    &:hover:before {
      content: '#';
      left: -1em;
      position: absolute;
    }
  }

  .post-meta {
    font-size: $small-font-size;
    color: $grey-color;
  }

}