@font-face {
  font-family: "Jersey 25";
  src: url("/assets/fonts/Jersey25-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  --learn-void: #121526;
  --learn-field: #1f233d;
  --learn-panel: #292f4b;
  --learn-ink: #f5eedc;
  --learn-muted: #b5bbd0;
  --learn-border: #465274;
  --learn-cyan: #83d7f3;
  --learn-amber: #e9b56d;
  --learn-on-accent: #121526;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--learn-void);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--learn-ink);
  background: var(--learn-void);
  font-family: "Jersey 25", "Courier New", monospace;
  overflow-x: hidden;
  font-size: 18px;
  line-height: 1.45;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 3px solid var(--learn-amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 20px;
  z-index: 200;
  padding: 12px 16px;
  color: var(--learn-on-accent);
  background: var(--learn-cyan);
}

.skip-link:focus {
  top: 20px;
}

.shell {
  width: min(calc(100% - 64px), 1240px);
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--learn-border);
  background: var(--learn-void);
}

.nav-wrap {
  display: flex;
  min-height: 76px;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  flex: 0 0 auto;
}

.brand-wordmark {
  display: block;
  width: 188px;
  height: auto;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}

.mobile-menu {
  display: none;
}

.desktop-nav a,
.footer-links a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--learn-muted);
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: 15px;
  letter-spacing: .06em;
  text-decoration: none;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--learn-ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--learn-cyan);
  padding: 9px 14px;
  color: var(--learn-cyan);
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: 15px;
  letter-spacing: .04em;
  text-decoration: none;
}

.button-primary {
  color: var(--learn-on-accent);
  background: var(--learn-cyan);
}

.button:hover,
.button:focus-visible {
  color: var(--learn-on-accent);
  border-color: var(--learn-ink);
  background: var(--learn-ink);
}

.button-small {
  min-height: 40px;
  padding-inline: 11px;
  font-size: 14px;
}

.site-footer {
  background: var(--learn-void);
}

.footer-main {
  display: flex;
  min-height: 120px;
  align-items: center;
  gap: 34px;
}

.footer-main p {
  max-width: 45ch;
  margin: 0;
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 15px;
}

.footer-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  color: var(--learn-cyan);
  font-family: "Jersey 25", "Courier New", monospace;
  text-decoration: none;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  border-top: 1px solid var(--learn-border);
  padding-block: 12px 16px;
}

.footer-links a {
  color: var(--learn-cyan);
  font-size: 14px;
}

.footer-meta {
  display: flex;
  min-height: 50px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--learn-border);
  color: var(--learn-muted);
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: 13px;
  letter-spacing: .05em;
}

.learn-page {
  background: var(--learn-void);
  color: var(--learn-ink);
}

.learn-page .learn-header {
  position: sticky;
  background: var(--learn-void);
}

.learn-main {
  min-height: 65vh;
  padding: 0;
}

.learn-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(36px, 6vw, 84px);
  padding-top: clamp(72px, 12vw, 148px);
  padding-bottom: clamp(52px, 8vw, 96px);
}

.learn-hero-copy {
  min-width: 0;
}

.learn-hero-art {
  min-width: 0;
  margin: 0;
}

.learn-hero-art img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 660px;
  object-fit: contain;
  object-position: center;
}

.learn-kicker {
  margin: 0 0 18px;
  color: var(--learn-cyan);
  font-size: 14px;
  letter-spacing: .1em;
}

.learn-hero h1,
.learn-article-header h1,
.learn-empty h1 {
  max-width: 13ch;
  margin: 0;
  color: var(--learn-ink);
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: clamp(48px, 8vw, 104px);
  font-weight: 400;
  line-height: .92;
  letter-spacing: -.02em;
}

.learn-intro {
  max-width: 60ch;
  margin: 28px 0 0;
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.55;
}

.learn-hero-actions,
.learn-article-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
}

.learn-hero-actions .button,
.learn-article-actions .button {
  text-decoration: none;
}

.learn-index {
  border-top: 1px solid var(--learn-border);
  padding-top: 26px;
}

.learn-section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.learn-section-heading h2 {
  margin: 0;
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 400;
  line-height: 1;
}

.learn-section-heading > span {
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 14px;
}

.learn-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.learn-card {
  display: flex;
  min-height: 224px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--learn-border);
  padding: clamp(20px, 3vw, 32px);
  background: var(--learn-field);
}

.learn-card-image-link {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  margin: clamp(-32px, -3vw, -20px) clamp(-32px, -3vw, -20px) 24px;
  background: var(--learn-panel);
}

.learn-card-image-link img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .2s ease;
}

.learn-card:hover .learn-card-image-link img,
.learn-card:focus-within .learn-card-image-link img {
  transform: scale(1.02);
}

.learn-card:hover,
.learn-card:focus-within {
  border-color: var(--learn-cyan);
  background: var(--learn-panel);
}

.learn-card h2 {
  max-width: 18ch;
  margin: 0 0 14px;
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 400;
  line-height: 1;
}

.learn-card h2 a {
  text-decoration: none;
}

.learn-card p,
.learn-empty p,
.learn-aside p {
  max-width: 58ch;
  margin: 0;
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

.learn-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 34px;
  color: var(--learn-cyan);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 13px;
}

.learn-link {
  color: var(--learn-cyan);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: .18em;
}

.learn-link:hover,
.learn-link:focus-visible,
.learn-card h2 a:hover,
.learn-card h2 a:focus-visible {
  color: var(--learn-ink);
  text-decoration-color: currentColor;
}

.learn-hero-actions .learn-link.button-secondary:hover,
.learn-hero-actions .learn-link.button-secondary:focus-visible,
.learn-article-actions .learn-link.button-secondary:hover,
.learn-article-actions .learn-link.button-secondary:focus-visible {
  color: var(--learn-on-accent);
  text-decoration: none;
}

.learn-empty {
  border: 1px dashed var(--learn-border);
  padding: clamp(24px, 5vw, 56px);
}

.learn-empty h2 {
  margin: 0 0 12px;
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: 32px;
  font-weight: 400;
}

.learn-article-main {
  padding-top: clamp(44px, 8vw, 92px);
}

.learn-article {
  max-width: 1240px;
}

.learn-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 36px;
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 14px;
}

.learn-article-header {
  min-width: 0;
  border-bottom: 1px solid var(--learn-border);
  padding-bottom: 34px;
}

.learn-article-header h1 {
  max-width: 18ch;
  font-size: clamp(50px, 8vw, 100px);
}

.learn-article-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(36px, 6vw, 84px);
}

.learn-article-visual {
  min-width: 0;
  margin: 0;
}

.learn-article-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: contain;
  object-position: center;
}

.learn-article-visual-community {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.learn-article-visual-community img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
}

.learn-summary {
  max-width: 62ch;
  margin: 24px 0 0;
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.55;
}

.learn-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  margin-top: 25px;
  color: var(--learn-muted);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 14px;
}

.learn-byline > span:first-child {
  color: var(--learn-ink);
}

.learn-date {
  display: inline-flex;
  gap: 5px;
}

.learn-article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(190px, 260px);
  justify-content: space-between;
  gap: clamp(36px, 8vw, 120px);
  margin-top: 44px;
}

.learn-prose {
  min-width: 0;
  color: var(--learn-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.75;
}

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

.learn-prose h2,
.learn-prose h3,
.learn-prose h4 {
  margin: 2.2em 0 .5em;
  color: var(--learn-ink);
  font-family: "Jersey 25", "Courier New", monospace;
  font-weight: 400;
  line-height: 1.1;
}

.learn-prose h2 { font-size: 34px; }
.learn-prose h3 { font-size: 27px; }
.learn-prose h4 { font-size: 22px; }

.learn-prose p,
.learn-prose ul,
.learn-prose ol,
.learn-prose blockquote,
.learn-prose pre,
.learn-prose table {
  margin: 0 0 1.15em;
}

.learn-prose ul,
.learn-prose ol {
  padding-left: 1.35em;
}

.learn-prose li + li {
  margin-top: .35em;
}

.learn-prose a {
  color: var(--learn-cyan);
  text-decoration: underline;
  text-underline-offset: .15em;
}

.learn-prose a:hover,
.learn-prose a:focus-visible {
  color: var(--learn-ink);
}

.learn-prose strong {
  color: var(--learn-ink);
  font-weight: 700;
}

.learn-prose blockquote {
  border: 1px solid var(--learn-border);
  padding: 18px 20px;
  color: var(--learn-muted);
  background: var(--learn-field);
}

.learn-prose code {
  padding: .1em .3em;
  color: var(--learn-cyan);
  background: var(--learn-field);
  font-size: .9em;
}

.learn-prose pre {
  overflow-x: auto;
  border: 1px solid var(--learn-border);
  padding: 16px;
  color: var(--learn-ink);
  background: var(--learn-field);
}

.learn-prose pre code {
  padding: 0;
  color: inherit;
  background: transparent;
}

.learn-prose hr {
  margin: 2.4em 0;
  border: 0;
  border-top: 1px solid var(--learn-border);
}

.learn-prose table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}

.learn-prose th,
.learn-prose td {
  border-bottom: 1px solid var(--learn-border);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
}

.learn-prose th {
  color: var(--learn-cyan);
  font-weight: 600;
}

.learn-prose img {
  display: block;
  max-width: 100%;
  height: auto;
}

.learn-prose code,
.learn-prose pre {
  overflow-wrap: anywhere;
}

.learn-aside {
  align-self: start;
  border-top: 1px solid var(--learn-border);
  padding-top: 14px;
}

.learn-final-cta {
  margin-top: 96px;
  border-top: 1px solid var(--learn-cyan);
  padding: 90px 0 96px;
  background: var(--learn-cyan);
  color: var(--learn-on-accent);
}

.learn-final-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, .65fr);
  align-items: end;
  gap: 70px;
}

.learn-final-cta h2 {
  margin: 0;
  color: var(--learn-on-accent);
  font-size: clamp(52px, 6vw, 86px);
  font-weight: 400;
  line-height: .92;
  letter-spacing: -.045em;
}

.learn-final-cta h2 span {
  color: var(--learn-void);
}

.learn-final-cta p {
  margin: 0 0 25px;
  color: var(--learn-on-accent);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 20px;
}

.learn-final-cta .button-primary,
.learn-final-cta .button-primary:hover,
.learn-final-cta .button-primary:focus-visible {
  border-color: var(--learn-void);
  color: var(--learn-ink);
  background: var(--learn-void);
  box-shadow: none;
}

.learn-final-cta .button-primary:hover,
.learn-final-cta .button-primary:focus-visible {
  border-color: var(--learn-panel);
  background: var(--learn-panel);
}

.learn-final-cta small {
  display: block;
  margin-top: 17px;
  color: var(--learn-void);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 15px;
}

.learn-aside h2 {
  margin: 0 0 10px;
  font-family: "Jersey 25", "Courier New", monospace;
  font-size: 28px;
  font-weight: 400;
}

.learn-aside-links {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.learn-footer {
  border-top: 1px solid var(--learn-border);
}

@media (max-width: 760px) {
  .shell {
    width: min(calc(100% - 32px), 1240px);
  }

  .brand-wordmark {
    width: min(175px, 55vw);
  }

  .learn-page .desktop-nav,
  .learn-page .nav-actions > .button {
    display: none;
  }

  .learn-page .nav-actions {
    margin-left: auto;
  }

  .learn-page .mobile-menu {
    display: grid;
    grid-template-columns: repeat(3, max-content) minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    padding: 8px 0 12px;
    border-top: 1px solid var(--learn-border);
    background: var(--learn-void);
  }

  .learn-page .mobile-menu a {
    display: flex;
    min-width: 0;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    color: var(--learn-muted);
    font-size: 14px;
    letter-spacing: .05em;
    text-decoration: none;
  }

  .learn-page .mobile-menu a:hover,
  .learn-page .mobile-menu a:focus-visible {
    color: var(--learn-ink);
  }

  .learn-page .mobile-menu-cta {
    margin-top: 0;
    padding: 0 8px;
    color: var(--learn-on-accent) !important;
    background: var(--learn-cyan);
  }

  .learn-hero,
  .learn-article-hero {
    grid-template-columns: 1fr;
  }

  .learn-hero-art img {
    max-height: 480px;
  }

  .learn-card-grid,
  .learn-article-layout {
    grid-template-columns: 1fr;
  }

  .learn-card {
    min-height: 190px;
  }

  .learn-article-layout {
    gap: 52px;
  }

  .learn-article-visual img {
    max-height: 380px;
  }

  .learn-aside {
    max-width: 420px;
  }

  .learn-final-cta-inner {
    display: block;
  }

  .learn-final-cta-inner > div:last-child {
    margin-top: 32px;
  }

  .learn-final-cta-inner > div:last-child p {
    font-size: 18px;
  }

  .learn-final-cta .button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .shell {
    width: min(calc(100% - 24px), 1240px);
  }

  .learn-page .footer-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px 18px;
    padding-block: 18px;
  }

  .learn-page .footer-main .brand {
    grid-column: 1 / -1;
  }

  .learn-page .footer-main p {
    min-width: 0;
  }

  .learn-page .footer-link {
    margin-left: 0;
  }

  .learn-hero {
    padding-top: 56px;
  }

  .learn-section-heading {
    align-items: start;
    flex-direction: column;
    gap: 8px;
  }

  .learn-prose {
    font-size: 17px;
  }
}