edx-platform/cms/static/sass/elements/_header.scss

// studio - elements - global header
// ====================

.wrapper-header {
  @extend .depth3;
  @include box-shadow(0 1px 2px 0 $shadow-l1);
  position: relative;
  width: 100%;
  margin: 0;
  padding: 0 $baseline;
  background: $white;

  header.primary {
    @include box-sizing(border-box);
    @include clearfix();
    max-width: $fg-max-width;
    min-width: $fg-min-width;
    width: flex-grid(12);
    margin: 0 auto;
  }

  // ====================

  // basic layout

  .wrapper-l, .wrapper-r {
    background: $white;
  }

  .wrapper-l {
    float: left;
    width: flex-grid(7,12);
  }

  .wrapper-r {
    float: right;
    width: flex-grid(4,12);
    text-align: right;
  }

  .branding, .info-course, .nav-course, .nav-account, .nav-pitch {
    @include box-sizing(border-box);
    display: inline-block;
    vertical-align: middle;
  }

  .nav-account {
    width: 100%;
  }

  // basic layout - nav items
  nav {

    > ol > .nav-item {
      @extend .t-action3;
      display: inline-block;
      vertical-align: middle;
      font-weight: 600;

      &:last-child {
        margin-right: 0;
      }
    }

    .nav-item a {
      color: $gray-d1;

      &:hover {
        color: $blue-s1;
      }
    }
  }

  // basic layout - dropdowns
  .nav-dd {

    .title {
      @extend .t-action2;
      @extend .btn-dd-nav-primary;
      @include transition(all 0.25s ease-in-out 0);

      .label, .icon-caret-down {

      }

      .label {

      }

      .icon-caret-down {
        opacity: 0.25;
      }

      &:hover {

        .icon-caret-down {
          opacity: 1.0;
        }
      }

      .nav-sub .nav-item {

        [class^="icon-"] {
          display: inline-block;
          vertical-align: middle;
          margin-right: ($baseline/4);
        }
      }
    }
  }

  // ====================

  // specific elements - branding
  .branding {
    padding: ($baseline*0.75) 0;

    a {
      display: block;

      img {
        width: 100%;
        display: block;
      }
    }
  }

  // ====================

  // specific elements - course name/info
  .info-course {
    margin-right: flex-gutter();
    border-right: 1px solid $gray-l4;
    padding: ($baseline*0.75) flex-gutter() ($baseline*0.75) 0;

    .course-org, .course-number {
      @extend .t-action4;
      display: inline-block;
      vertical-align: middle;
      max-width: 45%;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
      opacity: 0.75;
    }

    .course-org {
      margin-right: ($baseline/4);
    }

    .course-title {
      @extend .t-action2;
      display: block;
      width: 100%;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
      font-weight: 600;
    }

    // entire link
    .course-link {
      @include transition(color 0.25s ease-in-out);
      display: block;
      color: $gray-d1;

      &:hover {
        color: $blue-s1;
      }
    }
  }

  // ====================

  // specific elements - course nav
  .nav-course {
    padding: ($baseline*0.75) 0;
  }

  // ====================

  // specific elements - account-based nav
  .nav-account {
    position: relative;
    padding: ($baseline*0.75) 0;

    .nav-sub {
      text-align: left;
    }

    .nav-account-help {

      .wrapper-nav-sub {
        width: ($baseline*10);
      }
    }

    .nav-account-user {

      .title {
        max-width: ($baseline*6.5);

        > .label {
          display: inline-block;
          max-width: 85%;
          overflow: hidden;
          white-space: nowrap;
          text-overflow: ellipsis;
        }
      }
    }
  }

  // ====================

  // specific elements - pitch/how it works nav
  .nav-pitch {
    position: relative;
    padding: ($baseline*0.75) 0;

    .nav-sub {
      text-align: left;
    }
  }
}

// ====================

// CASE: user signed in
.is-signedin {

  .wrapper-l {
    width: flex-grid(9,12);
  }

  .wrapper-r {
    width: flex-grid(3,12);
  }

  .branding {
    width: 20%;
    margin-right: 2%;
  }

  .nav-account {
    top: ($baseline/4);
  }
}

// ====================

// CASE: in course {
.is-signedin.course {

  .wrapper-header {

    .wrapper-l {
      width: flex-grid(9,12);
    }

    .wrapper-r {
      width: flex-grid(3,12);
    }

    .branding {
      width: 20%;
      margin-right: 2%;
    }

    .info-course {
      width: 25%;
      margin-right: 2%;
    }

    .nav-course {
      width: 45%;
    }
  }
}

// ====================

// CASE: user not signed in
.not-signedin {

  .wrapper-header {

    .wrapper-l {
      width: flex-grid(2,12);
    }

    .wrapper-r {
      width: flex-grid(10,12);
    }

    .branding {
      width: 100%;
    }

    .nav-pitch {
      top: ($baseline/4);

      .nav-item {
        margin-right: ($baseline/2);

        &:last-child {
          margin-right: 0;
        }
      }

      .action-signup {
        @include blue-button;
        @include transition(all .15s);
        @include font-size(14);
        padding: ($baseline/4) ($baseline/2);
        text-transform: uppercase;
        font-weight: 600;
      }

      .action-signin {
        @include white-button;
        @include transition(all .15s);
        @include font-size(14);
        padding: ($baseline/4) ($baseline/2);
        text-transform: uppercase;
        font-weight: 600;
      }
    }
  }
}

// ====================

// STATE: active/current nav states

.nav-item.is-current,
body.howitworks .nav-not-signedin-hiw,

// dashboard
body.dashboard .nav-account-dashboard,

// course content
body.course.outline .nav-course-courseware .title,
body.course.updates .nav-course-courseware .title,
body.course.pages .nav-course-courseware .title,
body.course.uploads .nav-course-courseware .title,

body.course.outline .nav-course-courseware-outline,
body.course.updates .nav-course-courseware-updates,
body.course.pages .nav-course-courseware-pages,
body.course.uploads .nav-course-courseware-uploads,

// course settings
body.course.schedule .nav-course-settings .title,
body.course.grading .nav-course-settings .title,
body.course.team .nav-course-settings .title,
body.course.advanced .nav-course-settings .title,

body.course.schedule .nav-course-settings-schedule,
body.course.grading .nav-course-settings-grading,
body.course.team .nav-course-settings-team,
body.course.advanced .nav-course-settings-advanced,

// course tools
body.course.import .nav-course-tools .title,
body.course.export .nav-course-tools .title,
body.course.checklists .nav-course-tools .title,

body.course.import .nav-course-tools-import,
body.course.export .nav-course-tools-export,
body.course.checklists .nav-course-tools-checklists,

{
  color: $blue;

  a {
    color: $blue;
    pointer-events: none;
  }
}