/* Base styles */
:root {
  --primary-color: #1d70b8;
  --secondary-color: #003078;
  --text-color: #0b0c0c;
  --background-color: #ffffff;
  --light-grey: #f3f2f1;
  --mid-grey: #b1b4b6;
  --dark-grey: #505a5f;
  --focus-color: #ffdd00;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --container-width: 960px;
  --breakpoint-mobile: 640px;
  --breakpoint-tablet: 768px;
  --breakpoint-desktop: 960px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, figcaption, blockquote, dl, dd {
  margin: 0;
  padding: 0;
}

/* Base styling */
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--background-color);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

.heading-xl {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.heading-l {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.heading-m {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.heading-s {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary-color);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--secondary-color);
  text-decoration-thickness: 3px;
}

a:focus {
  outline: 3px solid transparent;
  color: var(--text-color);
  background-color: var(--focus-color);
  box-shadow: 0 -2px var(--focus-color), 0 4px var(--text-color);
  text-decoration: none;
}

/* Lists */
ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

.list {
  list-style: none;
  padding-left: 0;
}

/* Grid system */
.grid-row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -1rem;
  margin-bottom: 2rem;
}

.grid-column-one-third {
  width: 100%;
  padding: 0 1rem;
}

.grid-column-two-thirds {
  width: 100%;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .grid-column-one-third {
    width: 33.333%;
  }
  
  .grid-column-two-thirds {
    width: 66.666%;
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  margin: inherit;
  overflow: visible;
  clip: auto;
  clip-path: none;
  white-space: inherit;
  display: block;
  padding: 1rem;
  background: var(--focus-color);
  outline: 3px solid var(--focus-color);
  text-align: center;
  z-index: 100;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--mid-grey);
  padding: 1rem 0;
  margin-bottom: 2rem;
  background-color: var(--light-grey);
}

.header-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}


/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}

th, td {
  border: 1px solid var(--mid-grey);
  padding: 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  background-color: var(--light-grey);
  font-weight: 700;
}

tr:nth-child(even) {
  background-color: #fafafa;
}


@media (min-width: 768px) {
  .header-wrapper {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.site-logo {
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .site-logo {
    margin-bottom: 0;
  }
}

.logo-link {
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-color);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item {
  margin-right: 1.5rem;
  margin-bottom: 0.5rem;
}

.nav-item:last-child {
  margin-right: 0;
}

.nav-item a {
  text-decoration: none;
  font-weight: 500;
}

.nav-item.active a {
  font-weight: 700;
  text-decoration: underline;
}

/* Breadcrumbs */
.breadcrumbs {
  margin-bottom: 2rem;
}

.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  padding: 0;
  margin: 0;
  list-style: none;
}

.breadcrumbs-item {
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

.breadcrumbs-item::after {
  content: "/";
  display: inline-block;
  margin-left: 0.5rem;
  color: var(--dark-grey);
}

.breadcrumbs-item:last-child::after {
  content: "";
  margin: 0;
}

.breadcrumbs-item a {
  color: var(--primary-color);
}

.breadcrumbs-item[aria-current="page"] {
  color: var(--text-color);
  font-weight: 700;
}

/* Post styles */
.post-list {
  margin-top: 2rem;
}

.post-preview {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--light-grey);
}

.post-preview:last-child {
  border-bottom: none;
}

.post-meta {
  color: var(--dark-grey);
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.post-content {
  margin-bottom: 3rem;
}

.post-content h2 {
  margin-top: 2rem;
}

.post-content h3 {
  margin-top: 1.5rem;
}

.post-content img {
  max-width: 100%;
  height: auto;
  margin: 1.5rem 0;
}

.post-content blockquote {
  margin: 1.5rem 0;
  padding: 0.5rem 0 0.5rem 1.5rem;
  border-left: 5px solid var(--mid-grey);
  color: var(--dark-grey);
}

.post-content code {
  font-family: monospace;
  background-color: var(--light-grey);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
}

.post-content pre {
  background-color: var(--light-grey);
  padding: 1rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: 3px;
}

.post-content pre code {
  background-color: transparent;
  padding: 0;
}

/* Table of contents */
.table-of-contents {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--light-grey);
  border-left: 5px solid var(--primary-color);
}

.toc-list {
  margin-bottom: 0;
}

/* Sidebar */
.sidebar {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--light-grey);
}

.sidebar .heading-m {
  margin-top: 0;
}

.sidebar ul {
  margin-bottom: 0;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--light-grey);
}

.pagination-previous,
.pagination-next {
  flex: 1;
}

.pagination-next {
  text-align: right;
}

.pagination-link {
  display: inline-block;
  text-decoration: none;
}

.pagination-link-title {
  display: block;
  font-size: 0.875rem;
  color: var(--dark-grey);
}

.pagination-link-label {
  display: block;
  font-weight: 700;
}

/* Footer */
.site-footer {
  margin-top: 3rem;
  padding: 2rem 0;
  background-color: var(--light-grey);
  border-top: 1px solid var(--mid-grey);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-section {
  width: 100%;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .footer-section {
    width: 33.333%;
    padding-right: 2rem;
    margin-bottom: 0;
  }
}

.footer-heading {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--mid-grey);
  text-align: center;
  color: var(--dark-grey);
  font-size: 0.875rem;
}

/* Related items */
.related-items {
  margin-top: 2rem;
  padding: 1.5rem;
  background-color: var(--light-grey);
  border-left: 5px solid var(--primary-color);
}

.related-items .heading-m {
  margin-top: 0;
}

.related-items .list {
  margin-bottom: 0;
}

/* Media objects */
.media {
  display: flex;
  margin-bottom: 1.5rem;
}

.media-image {
  margin-right: 1rem;
  width: 100px;
  flex-shrink: 0;
}

.media-content {
  flex-grow: 1;
}

/* Print styles */
@media print {
  body {
    font-size: 12pt;
    line-height: 1.2;
  }
  
  .site-header,
  .site-nav,
  .site-footer,
  .related-items,
  .pagination {
    display: none;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.9em;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .grid-column-two-thirds {
    width: 100%;
  }
  
  .grid-column-one-third {
    display: none;
  }
}