hugo-book-theme/assets/book.scss

@import 'variables';
@import 'markdown';


html {
  font-size: $font-size-base;
  letter-spacing: .33px;
}

html, body {
  min-width: $body-min-width;
  overflow: hidden auto;
}

body {
  color: $body-font-color;
  background: $body-background;

  font-family: 'Oxygen', sans-serif;
  font-weight: $body-font-weight;

  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  box-sizing: border-box;
  * {
    box-sizing: inherit;
  }
}

h1, h2, h3, h4, h5 {
  font-weight: 400;
}

a {
  text-decoration: none;
  color: $color-link;

  &:visited {
    color: $color-visited-link;
  }
}

img {
  vertical-align: middle;
}

aside {
  ul {
    margin: 0;
    padding-left: $padding-16;
    list-style: none;
    line-height: 1.5em;

    li {
      margin: .75em 0;

      a { display: block; }
      a:hover { opacity: .5; }
  
      img {
        height: $padding-16;
      }
    }
  }

  // start padding on second level
  nav > ul {
    padding-left: 0;
  }
}

aside.fixed nav {
  position: fixed;
  top: 0;
  bottom: 0;
  overflow: hidden auto;
}

header {
  display: flex;
  align-items:center;
  justify-content: space-between;
  margin-bottom: $padding-16;

  display: none;
}

main {
  max-width: $content-max-width;
  margin: 0 auto;

  display: flex;
  flex-flow: row;

  aside nav, .content, .markdown {
    transition: .2s ease-in-out;
    transition-property: transform, margin-left, opacity;
    will-change: transform, margin-left;
  }

  .menu {
    flex: 0 0 $nav-menu-width;

    .brand {
      margin-top: 0;
    }

    nav {
      width: $nav-menu-width;
      padding: $padding-16;
      font-size: $font-size-14;
    }

    a { color: $nav-link-color; }
    a.active { color: $color-link; }

    .flat-section {
      margin-bottom: $padding-16;
      > a { font-weight: 700; }
      > ul { padding-left: 0; }
    }
  }

  .content {
    flex: 1 0;
    width: 0;
    min-width: $body-min-width;
    padding: $padding-16;
  }

  .toc {
    flex: 0 0 $toc-menu-width;

    nav {
      width: $toc-menu-width;
      padding: $padding-16;
      font-size: $font-size-12;

      ul ul {
        padding-left: $padding-8;
      }
    }
  }
}

// Responsive styles
$menu-hide-point: $nav-menu-width + $body-min-width;
$toc-hide-point: $menu-hide-point + $nav-menu-width;

@media screen and (max-width: $toc-hide-point) {
  .toc {
    display: none;
  }
}

@media screen and (max-width: $menu-hide-point) {
  .menu {
    margin-left: -$nav-menu-width;
  }

  main header {
    display: flex;
  }

  #menu-control:checked + main {
    .menu nav, .content {
      transform: translateX($nav-menu-width);
    }
    
    header label img {
      transform: rotate(90deg);
    }

    .markdown {
      opacity: .25;
    }
  }
}

// Extra space for big screens
@media screen and (min-width: $toc-hide-point) {
  main {
    .content {
      padding: $padding-16 * 2 $padding-16;
    }

    .menu nav, .toc nav {
      padding: $padding-16 * 2;
    }
  } 
}