$max-width: 1200px !default;

// Padding used for layout margins
$pad-min: 18px !default;
$pad-narrow: 25px !default;
$pad-medium: 35px !default;
$pad-wide: 55px !default;

// Sidebar widths used in media queries
$sidebar-width-medium: 240px !default;
$sidebar-pad-medium: 15px !default;
$sidebar-pad-wide: 20px !default;
$sidebar-width-wide: 300px !default;

.group { @include pie-clearfix; }

body {
  -webkit-text-size-adjust: none;
  max-width: $max-width;
  position: relative;
  margin: 0 auto;
  > header, > nav, > footer, #articles > article, #articles > nav {
    @extend .group;
    padding-left: $pad-min;
    padding-right: $pad-min;
    @media only screen and (min-width: 480px) {
      padding-left: $pad-narrow;
      padding-right: $pad-narrow;
    }
    @media only screen and (min-width: 768px) {
      padding-left: $pad-medium;
      padding-right: $pad-medium;
    }
    @media only screen and (min-width: 992px) {
      padding-left: $pad-wide;
      padding-right: $pad-wide;
    }
  }
  > header {
    font-size: 1em;
    padding-top: 1.5em;
    padding-bottom: 1.5em;
  }
}

.toggle-sidebar { display: none; }
#articles { width: 100%;
  + aside {
    float: none;
    padding: 0 $pad-min 1px;
    background-color: $sidebar-bg;
    border-top: 1px solid $sidebar-border;
  }
}

@media only screen and (min-width: 550px) {
  body > header { font-size: 1em; }
}
@media only screen and (min-width: 768px) {
  body { -webkit-text-size-adjust: auto; }
  body > header { font-size: 1.2em; }
  body > nav {
    + div {
      @extend .group;
      padding: 0;
      margin: 0 auto;
      > div {
        @extend .group;
        margin-right: $sidebar-width-medium;
      }
    }
  }
  #articles {
    padding-top: $pad-medium/2;
    padding-bottom: $pad-medium/2;
    float: left;
    + aside {
      width: $sidebar-width-medium - $sidebar-pad-medium*2;
      padding: 0 $sidebar-pad-medium $sidebar-pad-medium;
      background: none;
      float: left;
      margin: 0 -100% 0 0;
    }
  }
  body > div > div { position: relative; }

  .collapse-sidebar {
    > div > div { margin-right: 10px; }
    #articles + aside {
      display: none;
    }
    .toggle-sidebar {
      right: -1px;
      background-color: $sidebar-bg;
      border-right-width: 0;
      text-indent: 2px;
      border-left: 1px solid $sidebar-border;
      @include border-bottom-right-radius(0);
      @include border-bottom-left-radius(.3em);
      @include link-colors(#aaa, #888);
    }
  }

  .toggle-sidebar {
    outline: none;
    position: absolute; right: -21px; top: 0;
    width: 20px;
    font-size: 1.2em;
    line-height: 1.1em;
    padding-bottom: .1em;
    text-indent: -1px;
    text-decoration: none;
    @include link-colors(#ccc, #999);
    @include border-bottom-right-radius(.3em);
    text-align: center;
    background: $main-bg;
    border-bottom: 1px solid $sidebar-border;
    border-right: 1px solid $sidebar-border;
    display: inline-block;
  }
}

@media only screen and (min-width: 992px) {
  body > header { font-size: 1.3em; }
  body > nav + div > div { margin-right: $sidebar-width-wide; }
  #articles {
    padding-top: $pad-wide/2;
    padding-bottom: $pad-wide/2;
    + aside {
      width: $sidebar-width-wide - $sidebar-pad-wide*2;
      padding: 1.2em $sidebar-pad-wide $sidebar-pad-wide;
    }
  }
}