// ---------------------------------------------------------
// 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;
$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: $color-almostblack;
  }

  // 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 {
        visibility: visible;
        max-height: 100%;
        height: 100vh;
        overflow: auto;
      }
    }
  }

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

    .menu-items {
      margin: 0;
      width: 100%;
      float: none;
      padding: 2rem 0;

      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;

        // We have color here, so it's okay to remove outline
        outline: none;

        &:focus {
          outline: none;
        }

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

        &:hover,
        &:focus,
        &: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;

        &:focus {
          z-index: 10000;
        }

        &:before {
          content: '+';
        }

        &:hover {
          background-color: #3e4853;
          color: #fff;
        }

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

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

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

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

            li {
              padding-left: 3rem;
            }

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

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

        a {
          font-size: 1.4rem;
        }
      }
    }
  }
}

// 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: 0;
  margin: 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;
      }

      &:before,
      &: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;

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

          &:after {
            background-color: $nav-toggle-active-color;
          }
        }
      }
    }

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

        &:after {
          background-color: $nav-toggle-active-color;
        }
      }
    }

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

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

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