framework/ember/app/styles/flarum/layout.less

body {
  background: @fl-body-bg;
  color: @fl-body-color;
  padding-top: 56px;
}
.container-narrow {
  max-width: 500px;
  margin: 0 auto;
}

// ------------------------------------
// Header

.global-header {
  background: fade(@fl-hdr-bg, 98%);
  transform: translateZ(0); // Fix for Chrome bug where a transparent white background is actually gray
  padding: 10px;
  height: 56px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: @zindex-navbar-fixed;
  .clearfix();
  .transition(box-shadow 0.2s);

  .scrolled & {
    .box-shadow(0 2px 6px @fl-shadow-color);
  }

  & when (@fl-colored-hdr = true) {
    &, & .btn-link {
      color: @fl-hdr-control-color;
    }
    & .form-control {
      background: @fl-hdr-control-bg;
      border: 0;
      color: @fl-hdr-control-color;
      .placeholder(@fl-hdr-control-color);

      &:focus {
        background: fadein(@fl-hdr-control-bg, 5%);
      }
    }
    & .search-input:before {
      color: @fl-hdr-control-color;
    }
    & .btn-default, & .btn-default:hover {
      background: @fl-hdr-control-bg;
      color: @fl-hdr-control-color;
    }
    & .btn-default.active, .open > .dropdown-toggle.btn-default {
      background: fadein(@fl-hdr-control-bg, 5%);
    }
    & .btn-naked {
      background: transparent;
    }
  }
}
.header-controls {
  margin: 0;
  padding: 0;
  list-style-type: none;
  &, & > li {
    display: inline-block;
    vertical-align: top;
  }
}
.header-primary {
  float: left;
  & h1 {
    display: inline-block;
    vertical-align: top;
  }
}
.header-title {
  font-size: 18px;
  font-weight: normal;
  margin: 0;
  line-height: 36px;
  &, & a {
    color: @fl-hdr-color;
  }
}
.header-secondary {
  float: right;
}

// Back button
// @todo Lots of !importants in here, could we be more specific?
.back-button {
  float: left;
  margin-right: 25px;

  & .back {
    z-index: 3 !important; // z-index of an active .btn-group .btn is 2
    border-radius: @border-radius-base !important;
    .transition(border-radius 0.2s);
  }
  & .pin {
    opacity: 0;
    margin-left: -36px !important;
    .transition(~"opacity 0.2s, margin-left 0.2s");

    &:not(.active) .fa {
      .rotate(45deg);
    }
  }
  &.active {
    & .back {
      border-radius: @border-radius-base 0 0 @border-radius-base !important;
    }
    & .pin {
      opacity: 1;
      margin-left: 1px !important;
    }
  }
}

// ------------------------------------
// Main

.global-main, .paned {
  border-top: 1px solid @fl-body-control-bg;
}

// Hero
.hero {
  background: @fl-body-hero-bg;
  margin-top: -1px;
  text-align: center;
  padding: 30px 0;
  font-size: 14px;

  &, & a {
    color: @fl-body-hero-color;
  }
  & a {
    opacity: 0.5;
  }
}
.hero .close {
  float: right;
  margin-top: -10px;
  color: #fff;
  opacity: 0.5;
}
.hero h2 {
  margin: 0;
  font-size: 22px;
  font-weight: normal;
}
.hero p {
  margin: 10px 0 0;
}

// ------------------------------------
// Footer

.global-footer {
  margin: 100px 0 20px;
  color: @fl-body-muted-more-color;
  .clearfix();
}
.footer-primary, .footer-secondary {
  margin: 0;
  padding: 0;
  list-style-type: none;

  & > li {
    display: inline-block;
    vertical-align: middle;
  }
  & a {
    color: @fl-body-muted-more-color;
    &:hover,
    &:focus {
      text-decoration: none;
      color: @link-hover-color;
    }
  }
}
.footer-primary {
  display: inline-block;
  & > li {
    margin-right: 15px;
  }
}
.footer-secondary {
  float: right;
  & > li {
    margin-left: 15px;
  }
}