/*
 * Contents
 *
 * Global resets
 * Masthead
 * Sidebar
 * Slide effect
 * Posts and pages
 * Pagination
 * Reverse layout
 */


/*
 * Global resets
 *
 * Update the foundational and global aspects of the page.
 */

:root {
  --black-bean:         #3C0D0B;
  --engineering-orange: #FF8C00; /* High-contrast red for links and accents */
  --blood-red:          #611711;
  --black:              #000000;
  --smoky-black:        #100D0B;
  --off-white:          #f1f1f1;
  --white:              #ffffff;
  --subtle-gray:        #9e9e9e;
  --border-color:       rgba(255, 255, 255, 0.15);
}


/* Prevent scroll on narrow devices */
html,
body {
  overflow-x: hidden;
  /* Dark Mode Change */
  background-color: var(--smoky-black);
  color: var(--off-white);
}

html {
  font-family: "PT Serif", Georgia, "Times New Roman", serif;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "PT Sans", Helvetica, Arial, sans-serif;
  font-weight: 700; /* Increased for contrast */
  /* Dark Mode Change */
  color: var(--white);
  letter-spacing: -.025rem;
}

/* General Link Styling for Dark Mode */
a {
  color: var(--engineering-orange);
  text-decoration: underline;
}
a:hover, a:focus {
  text-decoration: none;
}


/*
 * Wrapper
 *
 * The wrapper is used to position site content when the sidebar is toggled.
 */

.wrap {
  position: relative;
  width: 100%;
}


/*
 * Container
 *
 * Center the page content.
 */

.container {
  max-width: 28rem;
}
@media (min-width: 38em) {
  .container {
    max-width: 32rem;
  }
}
@media (min-width: 56em) {
  .container {
    max-width: 38rem;
  }
}


/*
 * Masthead
 *
 * Super small header above the content for site name and short description.
 */

.masthead {
  padding-top:    1rem;
  padding-bottom: 1rem;
  margin-bottom: 3rem;
  /* Dark Mode Change */
  border-bottom: 1px solid var(--border-color);
}
.masthead-title {
  margin-top: 0;
  margin-bottom: 0;
  color: var(--white);
}
.masthead-title a {
  color: var(--white);
}
.masthead-title small {
  font-size: 75%;
  font-weight: 400;
  color: var(--subtle-gray);
  letter-spacing: 0;
}

@media (max-width: 48em) {
  .masthead-title {
    text-align: center;
  }
  .masthead-title small {
    display: none;
  }
}


/*
 * Sidebar
 *
 * The sidebar is the drawer, the item we are toggling.
 */

/* Style and "hide" the sidebar */
.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: -14rem;
  width: 14rem;
  visibility: hidden;
  overflow-y: auto;
  font-family: "PT Sans", Helvetica, Arial, sans-serif;
  font-size: .875rem; /* 15px */
  color: var(--off-white);
  background-color: var(--black-bean);
  -webkit-transition: all .3s ease-in-out;
          transition: all .3s ease-in-out;
}
@media (min-width: 30em) {
  .sidebar {
    font-size: .75rem; /* 14px */
  }
}

/* Sidebar content */
.sidebar a {
  font-weight: normal;
  color: var(--white);
  text-decoration: none;
}
.sidebar-item {
  padding: 1rem;
}
.sidebar-item p:last-child {
  margin-bottom: 0;
}

/* Sidebar nav */
.sidebar-nav {
  border-bottom: 1px solid var(--blood-red);
}
.sidebar-nav-item {
  display: block;
  padding: .5rem 1rem;
  border-top: 1px solid var(--blood-red);
}
.sidebar-nav-item.active,
a.sidebar-nav-item:hover,
a.sidebar-nav-item:focus {
  text-decoration: none;
  background-color: var(--blood-red);
  border-color: transparent;
}

@media (min-width: 48em) {
  .sidebar-item {
    padding: 1.5rem;
  }
  .sidebar-nav-item {
    padding-left:  1.5rem;
    padding-right: 1.5rem;
  }
}

/* Hide the sidebar checkbox that we toggle with `.sidebar-toggle` */
.sidebar-checkbox {
  position: absolute;
  opacity: 0;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
}

/* Style the `label` that we use to target the `.sidebar-checkbox` */
.sidebar-toggle {
  position: absolute;
  top:  .8rem;
  left: 1rem;
  display: flex;
  align-items: center;
  padding: .25rem .75rem;
  background-color: transparent;
  border-radius: .25rem;
  cursor: pointer;
}

.sidebar-toggle::before {
  display: inline-block;
  width: 32px;
  height: 32px;
  content: "";
  /* Dark Mode Change: Icon is now white to show up on dark background */
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='%23f1f1f1' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill-rule='evenodd' d='M2.5 11.5A.5.5 0 013 11h10a.5.5 0 010 1H3a.5.5 0 01-.5-.5zm0-4A.5.5 0 013 7h10a.5.5 0 010 1H3a.5.5 0 01-.5-.5zm0-4A.5.5 0 013 3h10a.5.5 0 010 1H3a.5.5 0 01-.5-.5z' clip-rule='evenodd'/%3E%3C/svg%3E") no-repeat;
}

.sidebar-toggle:active,
#sidebar-checkbox:focus ~ .sidebar-toggle,
#sidebar-checkbox:checked ~ .sidebar-toggle {
  background-color: var(--engineering-orange);
}

.sidebar-toggle:active:before,
#sidebar-checkbox:focus ~ .sidebar-toggle::before,
#sidebar-checkbox:checked ~ .sidebar-toggle::before {
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='%23ffffff' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill-rule='evenodd' d='M2.5 11.5A.5.5 0 013 11h10a.5.5 0 010 1H3a.5.5 0 01-.5-.5zm0-4A.5.5 0 013 7h10a.5.5 0 010 1H3a.5.5 0 01-.5-.5zm0-4A.5.5 0 013 3h10a.5.5 0 010 1H3a.5.5 0 01-.5-.5z' clip-rule='evenodd'/%3E%3C/svg%3E") no-repeat;
}

@media (min-width: 30.1em) {
  .sidebar-toggle {
    position: fixed;
  }
}

@media print {
  .sidebar-toggle {
    display: none;
  }
}

/* Slide effect
 *
 * Handle the sliding effects of the sidebar and content.
 */

.wrap,
.sidebar,
.sidebar-toggle {
  -webkit-backface-visibility: hidden;
      -ms-backface-visibility: hidden;
          backface-visibility: hidden;
}
.wrap,
.sidebar-toggle {
  -webkit-transition: -webkit-transform .3s ease-in-out;
          transition: transform .3s ease-in-out;
}

#sidebar-checkbox:checked + .sidebar {
  z-index: 10;
  visibility: visible;
}
#sidebar-checkbox:checked ~ .sidebar,
#sidebar-checkbox:checked ~ .wrap,
#sidebar-checkbox:checked ~ .sidebar-toggle {
  -webkit-transform: translateX(14rem);
      -ms-transform: translateX(14rem);
          transform: translateX(14rem);
}


/*
 * Posts and pages
 */

.page,
.post {
  margin-bottom: 4em;
}

/* Blog post or page title */
.page-title,
.post-title {
  margin-top: 0;
  color: var(--white);
}
.post-title a {
  color: var(--white);
}
.post-title a:hover, .post-title a:focus {
    color: var(--engineering-orange);
}


/* Meta data line below post title */
.post-date {
  display: block;
  margin-top: -.5rem;
  margin-bottom: 1rem;
  color: var(--subtle-gray);
}

/* Related posts */
.related {
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border-color);
}
.related-posts {
  padding-left: 0;
  list-style: none;
}
.related-posts h3 {
  margin-top: 0;
}
.related-posts li small {
  font-size: 75%;
  color: var(--subtle-gray);
}
.related-posts li a:hover,
.related-posts li a:hover small {
  color: var(--engineering-orange);
}


/*
 * Pagination
 */

.pagination {
  overflow: hidden; /* clearfix */
  margin-left: -1rem;
  margin-right: -1rem;
  font-family: "PT Sans", Helvetica, Arial, sans-serif;
  text-align: center;
}

/* Pagination items can be `span`s or `a`s */
.pagination-item {
  display: block;
  padding: 1rem;
  border: 1px solid var(--border-color);
  color: var(--off-white);
}
.pagination-item:first-child {
  margin-bottom: -1px;
}

/* Only provide a hover state for linked pagination items */
a.pagination-item:hover {
  background-color: var(--blood-red);
  color: var(--white);
}

@media (min-width: 30em) {
  .pagination {
    margin: 3rem 0;
  }
  .pagination-item {
    float: left;
    width: 50%;
  }
  .pagination-item:first-child {
    margin-bottom: 0;
    border-top-left-radius:    4px;
    border-bottom-left-radius: 4px;
  }
  .pagination-item:last-child {
    margin-left: -1px;
    border-top-right-radius:    4px;
    border-bottom-right-radius: 4px;
  }
}


/*
 * Reverse layout
 *
 * Flip the orientation of the page.
 */

.layout-reverse .sidebar {
  left: auto;
  right: -14rem;
}
.layout-reverse .sidebar-toggle {
  left: auto;
  right: 1rem;
}

.layout-reverse #sidebar-checkbox:checked ~ .sidebar,
.layout-reverse #sidebar-checkbox:checked ~ .wrap,
.layout-reverse #sidebar-checkbox:checked ~ .sidebar-toggle {
  -webkit-transform: translateX(-14rem);
      -ms-transform: translateX(-14rem);
          transform: translateX(-14rem);
}


/*
 * Overlay sidebar
 *
 * Make the sidebar content overlay the viewport content.
 */

.sidebar-overlay #sidebar-checkbox:checked ~ .wrap {
  -webkit-transform: translateX(0);
      -ms-transform: translateX(0);
          transform: translateX(0);
}
.sidebar-overlay #sidebar-checkbox:checked ~ .sidebar-toggle {
  /* Dark Mode Change: Shadow is now against a dark background */
  box-shadow: 0 0 0 .25rem var(--smoky-black);
}
.sidebar-overlay #sidebar-checkbox:checked ~ .sidebar {
  box-shadow: .25rem 0 .5rem rgba(0,0,0,.1);
}

/* Only one tweak for a reverse layout */
.layout-reverse.sidebar-overlay #sidebar-checkbox:checked ~ .sidebar {
  box-shadow: -.25rem 0 .5rem rgba(0,0,0,.1);
}