/* PERTS support portals */

:root {
  --primary: #167bb1;
  --primary-hover: #12699a;
  --primary-dark: #061d2a;
  --primary-light: #acdbf4;
  --primary-tint: #eaf5fb;
  --primary-wash: #f4f9fd;
  --accent: #1c9de3; /* the FreshDesk portal's blue, for decoration only */
  --text: #2b3138;
  --text-muted: #5b6672;
  --border: #e2e8ee;
  --border-strong: #cdd6df;
  --surface: #ffffff;
  --bg: #f7f9fb;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(6, 29, 42, 0.06);
  --shadow: 0 1px 2px rgba(6, 29, 42, 0.05), 0 4px 16px rgba(6, 29, 42, 0.06);
  --shadow-hover: 0 2px 4px rgba(6, 29, 42, 0.06), 0 12px 28px rgba(6, 29, 42, 0.12);
  --header-h: 68px;
  --font: 'Open Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

html {
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

img {
  max-width: 100%;
  height: auto;
}

svg {
  width: 1em;
  height: 1em;
  flex: none;
}

a {
  color: var(--primary);
}

a:hover {
  color: var(--primary-hover);
}

:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
  border-radius: 4px;
}

h1,
h2,
h3,
h4 {
  color: var(--primary-dark);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 8px 14px;
  background: var(--primary-dark);
  color: #fff;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 12px;
}

/* ------------------------------------------------------------ buttons -- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.button:hover {
  background: var(--primary-hover);
  color: #fff;
}

.button svg {
  font-size: 18px;
}

.button--small {
  padding: 8px 14px;
  font-size: 14px;
}

.button--light {
  background: #fff;
  color: var(--primary-dark);
}

.button--light:hover {
  background: var(--primary-tint);
  color: var(--primary-dark);
}

/* ------------------------------------------------------------- header -- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: var(--primary-dark);
  min-width: 0;
  margin-right: auto;
}

.brand img {
  width: 126px;
  flex: none;
  display: block;
}

.brand-name {
  padding-left: 16px;
  border-left: 1px solid var(--border-strong);
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav a:not(.button),
.nav-menu nav a:not(.button) {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
}

.site-nav a:not(.button):hover,
.nav-menu nav a:not(.button):hover {
  background: var(--primary-tint);
  color: var(--primary-dark);
}

.site-nav .button {
  margin-left: 8px;
}

.header-search {
  position: relative;
  display: flex;
  width: 220px;
}

.header-search input {
  width: 100%;
  font: inherit;
  font-size: 14px;
  padding: 7px 36px 7px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
}

.header-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.header-search button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 999px;
  background: none;
  color: var(--text-muted);
  font-size: 17px;
  cursor: pointer;
}

.nav-menu {
  display: none;
  position: relative;
}

.nav-menu summary {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  list-style: none;
  cursor: pointer;
  font-size: 22px;
  color: var(--primary-dark);
}

.nav-menu summary::-webkit-details-marker {
  display: none;
}

.nav-menu[open] summary {
  background: var(--primary-tint);
}

.nav-menu nav {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 2px;
  min-width: 220px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
}

.nav-menu nav .button {
  margin-top: 6px;
}

/* --------------------------------------------------------------- hero -- */

.hero {
  background:
    radial-gradient(900px 420px at 88% -20%, rgba(172, 219, 244, 0.6), transparent 62%),
    radial-gradient(700px 360px at 0% 120%, rgba(28, 157, 227, 0.12), transparent 60%),
    linear-gradient(180deg, var(--primary-wash) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  padding-top: 64px;
  padding-bottom: 72px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 28px;
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.search-form {
  position: relative;
  display: flex;
  gap: 8px;
  max-width: 640px;
  margin: 0 auto;
  padding: 6px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  box-shadow: var(--shadow);
}

.search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light), var(--shadow);
}

.search-icon {
  display: grid;
  place-items: center;
  padding-left: 12px;
  color: var(--text-muted);
  font-size: 20px;
}

.search-form input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 17px;
  padding: 8px 4px;
  border: 0;
  background: none;
  color: var(--text);
}

.search-form input:focus {
  outline: none;
}

.search-form .button {
  border-radius: 999px;
  padding-left: 24px;
  padding-right: 24px;
}

.page-home .quick-links {
  margin-top: -36px;
}

/* -------------------------------------------------------- quick links -- */

.quick-links {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quick-link {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 100%;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--primary-dark);
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.quick-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  color: var(--primary-dark);
}

.quick-link-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 12px;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 24px;
}

/* -------------------------------------------------------------- cards -- */

.kb {
  padding: 56px 0 72px;
}

.kb > h2 {
  margin: 0 0 20px;
  font-size: 24px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
  color: inherit;
}

.card-title {
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--primary-dark);
}

.card-text {
  flex: 1;
  color: var(--text-muted);
  font-size: 15px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.card-arrow {
  margin-left: auto;
  color: var(--primary);
  font-size: 20px;
  display: grid;
  transition: transform 0.15s ease;
}

.card:hover .card-arrow {
  transform: translateX(3px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--primary-tint);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

/* ---------------------------------------------------------- page header -- */

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumbs li + li::before {
  content: '/';
  margin: 0 8px;
  color: var(--border-strong);
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.breadcrumbs [aria-current] {
  color: var(--text);
}

.page-header {
  padding: 20px 0 28px;
}

.page-header h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  font-size: 18px;
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 70ch;
}

.page-meta {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.page-tags {
  margin: 14px 0 0;
}

/* ------------------------------------------------------- folder lists -- */

.category-section {
  padding: 8px 0 32px;
}

.category-section h2 {
  margin: 0 0 4px;
  font-size: 22px;
}

.category-section h2 a {
  color: inherit;
  text-decoration: none;
}

.category-section h2 a:hover {
  color: var(--primary);
}

.section-text {
  margin: 0 0 16px;
  color: var(--text-muted);
  max-width: 70ch;
}

.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  padding-bottom: 48px;
}

.folder-card {
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.folder-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 17px;
}

.folder-card-title a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-dark);
  text-decoration: none;
}

.folder-card-title a:hover {
  color: var(--primary);
}

.folder-card-title svg {
  color: var(--primary);
  font-size: 20px;
}

.count {
  margin-left: auto;
  padding: 1px 9px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
}

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

.article-list li {
  border-top: 1px solid var(--border);
}

.article-list a {
  display: block;
  padding: 8px 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.4;
  text-decoration: none;
}

.article-list a:hover {
  color: var(--primary);
}

.more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.article-index {
  margin: 0 0 72px;
  padding: 0;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.article-index li + li {
  border-top: 1px solid var(--border);
}

.article-index a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  text-decoration: none;
}

.article-index a:hover {
  background: var(--primary-wash);
}

.article-index-title {
  font-weight: 600;
  color: var(--primary-dark);
}

.article-index-date {
  flex: none;
  font-size: 13px;
  color: var(--text-muted);
}

/* ----------------------------------------------------------- articles -- */

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
  padding-bottom: 72px;
}

.article {
  min-width: 0;
}

.prose {
  font-size: 16.5px;
  line-height: 1.7;
  max-width: 76ch;
  overflow-wrap: break-word;
}

/* Long addresses and emails in the text wrap rather than widen the page. */
.prose a {
  overflow-wrap: anywhere;
}

.prose > :first-child {
  margin-top: 0;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1em;
}

.prose li {
  margin: 0.3em 0;
}

.prose li > ul,
.prose li > ol {
  margin: 0.3em 0 0;
}

.prose h3 {
  margin: 1.8em 0 0.5em;
  font-size: 21px;
}

.prose h4 {
  margin: 1.5em 0 0.4em;
  font-size: 18px;
}

.prose strong {
  color: var(--primary-dark);
}

.prose a {
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.prose blockquote {
  margin: 1.4em 0;
  padding: 4px 0 4px 18px;
  border-left: 4px solid var(--primary-light);
  color: var(--text-muted);
}

.prose hr {
  margin: 2em 0;
  border: 0;
  border-top: 1px solid var(--border);
}

/* Screenshots: framed, and enlarged on click (app.js). */
.prose img {
  display: block;
  margin: 1.2em 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}

.prose img.zoomable {
  cursor: zoom-in;
}

.prose li img {
  margin: 0.6em 0;
}

/* Tables from FreshDesk, kept as HTML. */
.prose table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  margin: 1.4em 0;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.5;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.prose td,
.prose th {
  min-width: 9em; /* narrow screens scroll the table rather than crush it */
  padding: 10px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
  text-align: left;
}

.prose tr:first-child td,
.prose th {
  background: var(--primary-wash);
}

.prose td p {
  margin: 0 0 0.5em;
}

.prose td p:last-child {
  margin: 0;
}

.prose td img {
  margin: 0.4em 0;
}

/* Collapsible sections (FreshDesk accordions). */
.prose details {
  margin: 0 0 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.prose details[open] {
  box-shadow: var(--shadow);
}

.prose summary {
  position: relative;
  padding: 14px 48px 14px 18px;
  font-weight: 700;
  color: var(--primary-dark);
  cursor: pointer;
  list-style: none;
}

.prose summary::-webkit-details-marker {
  display: none;
}

.prose summary::after {
  content: '';
  position: absolute;
  right: 18px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -7px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}

.prose details[open] > summary::after {
  margin-top: -2px;
  transform: rotate(-135deg);
}

.prose summary:hover {
  background: var(--primary-wash);
}

.prose details > :not(summary) {
  margin-left: 18px;
  margin-right: 18px;
}

.prose details > summary + * {
  margin-top: 6px;
}

.prose details > :last-child {
  margin-bottom: 18px;
}

/* Video posters: the Wistia player loads only on click. */
.video {
  margin: 1.4em 0;
}

.video-poster,
.video iframe {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--primary-dark);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.video-poster img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin: 0;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transition: transform 0.3s ease, opacity 0.2s ease;
}

.video-poster:hover img {
  transform: scale(1.02);
  opacity: 0.92;
}

.play-badge {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  margin: -36px 0 0 -36px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--primary);
  font-size: 34px;
  box-shadow: 0 6px 24px rgba(6, 29, 42, 0.3);
}

.play-badge svg {
  margin-left: 4px;
}

.duration {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(6, 29, 42, 0.78);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.video figcaption {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

/* Previous and next in the folder. */
.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 48px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.pager-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.pager-link:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.pager-link--next {
  text-align: right;
  align-items: flex-end;
}

.pager-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
}

.pager-title {
  font-weight: 600;
  color: var(--primary-dark);
  line-height: 1.35;
}

.help-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding: 18px 22px;
  border-radius: var(--radius);
  background: var(--primary-tint);
}

.help-box p {
  margin: 0;
  color: var(--primary-dark);
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto;
  padding-bottom: 8px;
}

.side-card {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.side-title {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.side-title a {
  color: inherit;
  text-decoration: none;
}

.side-title a:hover {
  color: var(--primary);
}

.side-list,
.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.side-list a,
.toc a {
  display: block;
  padding: 6px 10px;
  margin: 0 -10px;
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
}

.side-list a:hover,
.toc a:hover {
  background: var(--primary-wash);
  color: var(--primary);
}

.side-list a[aria-current] {
  background: var(--primary-tint);
  color: var(--primary-dark);
  font-weight: 700;
}

.toc a {
  border-left: 2px solid var(--border);
  border-radius: 0 6px 6px 0;
  margin-left: 0;
}

.toc .toc-level-2 a {
  padding-left: 22px;
  font-size: 13px;
}

.toc a.is-current {
  border-left-color: var(--primary);
  color: var(--primary-dark);
  font-weight: 700;
}

/* ------------------------------------------------------------- search -- */

.search-results {
  max-width: 820px;
  margin: 32px 0 72px;
}

.search-summary {
  margin: 0 0 16px;
  color: var(--text-muted);
}

.result {
  display: block;
  padding: 16px 20px;
  margin-bottom: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.result:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  color: inherit;
}

.result-title {
  display: block;
  font-weight: 700;
  font-size: 17px;
  color: var(--primary-dark);
}

.result-place {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  color: var(--text-muted);
}

.result-text {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  color: var(--text);
}

.result mark {
  background: #fff1b8;
  color: inherit;
  border-radius: 2px;
}

/* Under a left-aligned page heading, the search box aligns left too. */
.page-search .search-form {
  margin: 0;
}

.not-found .search-form {
  margin: 0 0 20px;
}

/* ------------------------------------------------------------- signup -- */

.signup {
  background: linear-gradient(120deg, var(--primary-dark) 0%, #0c3a54 100%);
  color: #fff;
}

.signup-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.signup h2 {
  margin: 0 0 6px;
  color: #fff;
  font-size: 24px;
}

.signup p {
  margin: 0;
  max-width: 64ch;
  color: rgba(255, 255, 255, 0.82);
}

/* ------------------------------------------------------------- footer -- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 24px;
  padding-bottom: 24px;
}

.footer-inner img {
  display: block;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  font-size: 14px;
}

.footer-inner nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-inner nav a:hover {
  color: var(--primary);
}

/* --------------------------------------------------------------- misc -- */

.not-found {
  padding: 72px 24px 96px;
  max-width: 720px;
}

.not-found h1 {
  font-size: 36px;
  margin: 0 0 8px;
}

.not-found .lede {
  margin-bottom: 28px;
}

/* Enlarged screenshot */
.zoom-dialog {
  max-width: min(1200px, 96vw);
  max-height: 94vh;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 20px 60px rgba(6, 29, 42, 0.4);
}

.zoom-dialog::backdrop {
  background: rgba(6, 29, 42, 0.7);
}

.zoom-dialog img {
  display: block;
  max-width: 100%;
  max-height: 94vh;
  margin: 0;
  cursor: zoom-out;
}

/* ------------------------------------------------------------- narrow -- */

@media (max-width: 1080px) {
  .site-nav,
  .header-search {
    display: none;
  }

  .nav-menu {
    display: block;
  }
}

@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  /* The folder list moves below the article; the outline hides. */
  .sidebar {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .toc {
    display: none;
  }

  .quick-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .wrap {
    padding: 0 16px;
  }

  .brand {
    gap: 10px;
  }

  .brand img {
    width: 92px;
  }

  .brand-name {
    padding-left: 10px;
    font-size: 14px;
  }

  .hero-inner {
    padding-top: 40px;
    padding-bottom: 60px;
  }

  .search-form {
    border-radius: var(--radius);
  }

  .search-icon {
    display: none;
  }

  .search-form input {
    padding-left: 10px;
    font-size: 16px;
  }

  .search-form .button {
    border-radius: var(--radius-sm);
    padding-left: 16px;
    padding-right: 16px;
  }

  .quick-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .quick-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 14px;
    font-size: 14px;
  }

  .quick-link-icon {
    width: 38px;
    height: 38px;
    font-size: 20px;
  }

  .card-grid,
  .folder-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .kb {
    padding: 40px 0 56px;
  }

  .article-index a {
    flex-direction: column;
    gap: 2px;
    padding: 12px 16px;
  }

  .prose {
    font-size: 16px;
  }

  .pager {
    grid-template-columns: minmax(0, 1fr);
  }

  .pager-link--next {
    text-align: left;
    align-items: flex-start;
  }

  .help-box,
  .signup-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .play-badge {
    width: 56px;
    height: 56px;
    margin: -28px 0 0 -28px;
    font-size: 26px;
  }
}

@media (max-width: 380px) {
  .brand img {
    width: 76px;
  }

  .brand-name {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .sidebar,
  .pager,
  .help-box,
  .signup {
    display: none;
  }
}