// ---------------------------------------------------------
// Site navigation mobile layout
//
// The main layout for the website navigation, for the mobile
// version only.
// -----------------------------------------------------------
$nav-toggle-color: #333;
$nav-toggle-active-color: #fff;
$nav-background-color: #232426;
$hamburger-padding-x: 1.5rem;
$hamburger-padding-y: 5rem;
$hamburger-layer-width: 4rem;
$hamburger-layer-height: .2rem;
$hamburger-layer-spacing: .6rem;
$hamburger-layer-color: $nav-toggle-color;
$hamburger-layer-border-radius: 0;
$hamburger-hover-opacity: .8;
$hamburger-hover-transition-duration: .15s;
$hamburger-hover-transition-timing-function: linear;

@charset 'utf-8';

@import 'hamburgers/_sass/hamburgers/hamburgers';

// Choose hamburger animation here
// Choices: https://jonsuh.com/hamburgers/
.hamburger {
  @extend .hamburger--spin;
}

// Mobile styles
@media screen and (max-width: $responsivenav - 1px) {

  // Users that don't have Javascript enabled
  .no-js .site-header {
    position: static;

    // Use the same color than navigation
    background: $nav-background-color;
  }

  // Disable scroll on html body when menu is opened.
  .disable-scroll {
    overflow: hidden;
  }

  // Ensure nav stays in the same position when activated
  .js {
    &.js-nav-active {
      overflow: hidden;

      .nav-primary {
        visibility: visible;
        max-height: 100%;
        height: 100vh;
        overflow: auto;
      }
    }
  }

  .js .nav-primary {
    // Hide mobile navigation by default while enabling use of animations
    visibility: hidden;
    max-height: 0;
    height: 0;
    clip: auto;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    .menu-items {
      padding: 15% 0;
    }
  }

  .nav-primary {
    background: $nav-background-color;
    transition: all .55s;
    margin: 0;
    overflow: hidden;
    display: block;
    width: 100%;

    .menu-items {
      margin: 0;
      width: 100%;
      float: none;
      padding: 2rem 0;
      // We have color here, so it's okay to remove outline
      outline: none;

      a {
        padding-top: 1rem;
        padding-bottom: 1rem;
        padding-left: 5%;
        padding-right: 5.8rem; // Make room for the toggle button (sub indicator)
        color: #fff;
        font-size: 1.6rem;
        font-weight: 400;
        line-height: 1.7rem;
        text-decoration: none;
        position: relative;
        z-index: 0;
        display: block;
        outline: none; // We have color here, so it's okay to remove outline
      }

      a:focus {
        outline: none;
      }

      // Prevent nav item overlapping with dropdown opening toggle
      a.has-submenu {
        width: 80%;
        position: static;
      }

      a:hover,
      a:focus,
      a:active {
        color: $color-links;
      }

      .current {
        color: #d23600;
      }

      .disabled {
        color: #bbb;
      }

      .highlighted .sub-arrow:before {
        display: block;
        content: '-';
      }


      // Dropdown toggle
      .dropdown-toggle {
        position: absolute;
        top: 0;
        margin-top: 0;
        left: auto;
        right: 2rem;
        width: 3.7rem;
        height: 3.7rem;
        overflow: hidden;
        font: bold 18px/37px monospace;
        text-align: center;
        background: #202020;
        color: #fff;
        padding: 0;
        z-index: 9999;
        border: 0;
      }

      .dropdown-toggle:focus {
        z-index: 10000;
      }

      .dropdown-toggle:before {
        content: '+';
      }

      .dropdown-toggle:hover {
        background-color: #3e4853;
        color: #fff;
      }

      .dropdown-toggle.toggled-on:before {
        display: block;
        content: '-';
      }

      // Dropdowns
      ul {
        background: rgba(#666, .1);
        margin-left: 0;
        padding: 0;
      }

      ul a {
        font-size: 1.4rem;
      }

      // Slight margins to improve readability of sub-navs
      // Second level
      ul > li {
        padding-left: 1.5rem;
      }

      // Third level
      ul > li ul {
        margin-left: -1.5rem;
      }

      ul > li ul li {
        padding-left: 3rem;
      }

      // Fourth level
      ul > li ul li ul {
        margin-left: -3rem;
      }

      ul > li ul li ul li {
        padding-left: 4.5rem;
      }
    }
  }
}

// Hamburger menu icon
.nav-toggle {
  list-style: none;
  z-index: 100000;
  -webkit-tap-highlight-color: rgba(#000, 0);
  border: 0;
  overflow: visible;
  color: #fff;
  font-weight: 700;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-touch-callout: none;
  user-select: none;
  text-decoration: none;
  padding: 2rem;
  margin: 0 -2rem 0 0;
  background: transparent;
  cursor: pointer;
  position: relative;

  // Hide from desktops
  display: none;

  span {
    color: $nav-toggle-color;
    font-size: 1.2em;
  }

  // Alternative focus for mobile nav
  &:focus {
    outline: none;

    span span {
      background-color: $nav-toggle-color;
    }

    span span:before,
    span span:after {
      background-color: $nav-toggle-color;
    }
  }

  &:hover,
  &:active {
    color: $nav-toggle-color;

    span {
      color: $nav-toggle-color;
    }
  }

  @media (max-width: $responsivenav - 1px) {
    display: block;
  }

  // Separate active colors for opened state
  &.is-active {
    color: $nav-toggle-active-color;
  }

  &.is-active span:focus,
  &.is-active span.focus {
    .hamburger-box .hamburger-inner {
      background-color: $nav-toggle-active-color;
    }

    .hamburger-box .hamburger-inner:after {
      background-color: $nav-toggle-active-color;
    }
  }

  &.is-active span.hamburger-box {
    .hamburger-inner {
      background-color: $nav-toggle-active-color;
    }

    .hamburger-inner:after {
      background-color: $nav-toggle-active-color;
    }
  }

  &.is-active span:focus,
  &.is-active span:hover,
  &.is-active span:active {
    color: $nav-toggle-active-color;

    span {
      color: $nav-toggle-active-color;
    }
  }

  &.is-active span {
    color: $nav-toggle-active-color;
  }
}