/**
* @NAVIGATION CSS
*
* Uses flexbox layout concepts. Based on Pure CSS Hamburger Menu without
* JavaScript by Mark Caron.
*
* This file loads on all devices and platforms.
*
*
* @version      1.0.0
* @author       Christopher Leonard - University of Delaware | IT CS&S
* @license      MIT License
* @see          https://codepen.io/markcaron/pen/pPZVWO
*/
/*------------------------------------------------------------------
  1. @FLEXBOX
-------------------------------------------------------------------*/
/* Button styling */
.menu-toggle {
  display: inline-block;
  padding: .75em 15px;
  line-height: 1em;
  font-size: 1em;
  color: #333;
}

.menu-toggle:hover,
.menu-toggle:focus {
  color: #c00;
}

/*
 Default styles + Mobile first
 Offscreen menu style

300ms cubic-bezier(0.694, 0.0482, 0.335, 1)
*/
.main-menu {
  position: absolute;
  left: -200px;
  top: 0;
  height: 100%;
  overflow-y: scroll;
  overflow-x: visible;
  transition: left 0.3s ease,
              box-shadow 0.3s ease;
  z-index: 999;
}

.main-menu ul {
  list-style: none;
  margin: 0;
  padding: 2.5em 0 0;
  /* Hide shadow w/ -8px while 'closed' */
  -webkit-box-shadow: -8px 0 8px rgba(0,0,0,.5);
     -moz-box-shadow: -8px 0 8px rgba(0,0,0,.5);
          box-shadow: -8px 0 8px rgba(0,0,0,.5);
  min-height: 100%;
  width: 200px;
  background: #1a1a1a;
}

.main-menu a {
  display: block;
  padding: .75em 15px;
  line-height: 1em;
  font-size: 1em;
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid #383838;
}

.main-menu li:first-child a {
  border-top: 1px solid #383838;
}

.main-menu a:hover,
.main-menu a:focus {
  background: #333;
  text-decoration: underline;
}

.main-menu .menu-close {
  position: absolute;
  right: 0;
  top: 0;
}

/*
 On small devices, allow it to toggle...
*/
/*
 :target for non-JavaScript
 aria-expanded="true/false" will be for JavaScript
*/
.main-menu:target,
.main-menu[aria-expanded="true"] {
  left: 0;
  outline: none;
  -moz-box-shadow: 3px 0 12px rgba(0,0,0,.25);
  -webkit-box-shadow: 3px 0 12px rgba(0,0,0,.25);
  box-shadow: 3px 0 12px rgba(0,0,0,.25);
}

.main-menu:target .menu-close,
.main-menu[aria-expanded="true"] .menu-close {
  z-index: 1001;
}

.main-menu:target ul,
.main-menu[aria-expanded="true"] ul {
  position: relative;
  z-index: 1000;
}

/*
 We could us `.main-menu:target:after`, but
 it wouldn't be clickable.
*/
.main-menu:target + .backdrop,
.main-menu[aria-expanded="true"] + .backdrop {
  position: absolute;
  display: block;
  content: "";
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 998;
  background: #000;
  background: rgba(0,0,0,.85);
  cursor: default;
}

@supports (position: fixed) {
  .main-menu,
  .main-menu:target + .backdrop,
  .main-menu[aria-expanded="true"] + .backdrop {
    position: fixed;
  }
}

/*
 Larger screen styling
 Horizontal menu
*/
@media (min-width: 768px) {
  .menu-toggle,
  .main-menu .menu-close {
    display: none;
  }

  /* Undo positioning of off-canvas menu */
  .main-menu {
    position: relative;
    left: auto;
    top: auto;
    height: auto;
  }

  .main-menu ul {
    display: flex;

    /* Undo off-canvas styling */
    padding: 0;
    -webkit-box-shadow: none;
       -moz-box-shadow: none;
            box-shadow: none;
    height: auto;
    width: auto;
    background: none;
  }

  .main-menu a {
    color: #06c;
    border: 0 !important; /* Remove borders from off-canvas styling */
  }

  .main-menu a:hover,
  .main-menu a:focus {
    background: none; /* Remove background from off-canvas styling */
    color: #c00;
  }
  .main-menu:target + .backdrop,
  .main-menu[aria-expanded="true"] + .backdrop {
    background: transparent;
    cursor: none;
  }
  .main-menu:target,
  .main-menu[aria-expanded="true"]{
    box-shadow: none;
  }
}