:root {
  color-scheme: light dark;
  --bg: #f6f8fa;
  --surface: #fff;
  --text: #223249;
  --heading: #14283d;
  --muted: #526478;
  --line: #dbe3ea;
  --accent: #086f98;
  --accent-soft: #e8f3f8;
  --warm: #de6732;
  --shadow: 0 12px 36px rgb(23 49 74 / 6%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 1rem; line-height: 1.75; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent); text-underline-offset: .22em; text-decoration-thickness: .075em; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: .14em; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
.skip-link { position: absolute; z-index: 10; left: 1rem; top: -8rem; padding: .65rem 1rem; background: var(--surface); border: 2px solid var(--accent); }
.skip-link:focus { top: 1rem; }
.site-header { background: var(--surface); border-top: 4px solid var(--accent); border-bottom: 1px solid var(--line); }
.header-inner { max-width: 1200px; margin: auto; padding: 1.1rem 1.25rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; flex-shrink: 0; padding: .35rem .65rem; border-radius: .7rem; background: #fff; }
.brand img { display: block; width: 182px; height: auto; }
nav { width: 100%; }
.nav-list, .submenu { list-style: none; padding: 0; margin: 0; }
.nav-list { display: flex; flex-direction: column; gap: .3rem; }
.nav-list a { display: block; padding: .6rem .8rem; color: var(--heading); font-weight: 600; font-size: .92rem; text-decoration: none; border-radius: .4rem; }
.nav-list a:hover, .nav-list a[aria-current] { background: var(--accent-soft); color: var(--accent); }
.nav-list a[aria-current] { box-shadow: inset 3px 0 var(--accent); }
.submenu { margin: .15rem 0 .5rem 1rem; border-left: 1px solid var(--line); }
.submenu a { font-size: .88rem; }
.has-submenu > a::after { content: "⌄"; display: inline-block; margin-left: .45rem; color: var(--accent); }
.menu-toggle { display: none; align-items: center; gap: .55rem; padding: .55rem .75rem; background: var(--surface); color: var(--heading); border: 1px solid var(--line); border-radius: .5rem; cursor: pointer; }
.menu-icon, .menu-icon::before, .menu-icon::after { width: 18px; height: 2px; background: currentColor; display: block; position: relative; }
.menu-icon::before, .menu-icon::after { content: ""; position: absolute; left: 0; }
.menu-icon::before { top: -6px; }
.menu-icon::after { top: 6px; }
.nav-ready .menu-toggle { display: inline-flex; }
.nav-ready nav:not(.is-open) { display: none; }
main { width: 100%; flex: 1; }
.page-heading { max-width: 82ch; margin: 0 auto; padding: 2.6rem 1.25rem 1.65rem; }
.page-heading::before { content: ""; display: block; width: 2.5rem; height: 4px; background: var(--warm); margin-bottom: 1.1rem; border-radius: 2px; }
h1, h2, h3, h4 { color: var(--heading); line-height: 1.3; overflow-wrap: break-word; }
h1 { margin: 0; font-size: clamp(1.85rem, 4.5vw, 3rem); letter-spacing: -.035em; font-weight: 750; }
h2 { margin: 2.5rem 0 1rem; font-size: clamp(1.4rem, 3vw, 1.8rem); letter-spacing: -.02em; }
h3 { margin: 2rem 0 .85rem; font-size: 1.25rem; }
h4 { font-size: 1.1rem; margin: 1.5rem 0 .75rem; }
h2 strong, h3 strong { font-weight: inherit; }
p { margin: 0 0 1.3rem; }
.content { max-width: 82ch; padding: 1.6rem 1.25rem 2.5rem; margin: 0 auto 3.5rem; background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flow-root; }
.content > :first-child { margin-top: 0; }
.content > :last-child { margin-bottom: 0; }
.content ul, .content ol { padding-left: 1.5rem; margin: 1rem 0 1.7rem; }
.content li { margin: .55rem 0; padding-left: .15rem; }
.content li::marker { color: var(--accent); }
strong { font-weight: 650; }
blockquote { margin: 1.8rem 0; padding: 1.1rem 1.4rem; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 .6rem .6rem 0; }
blockquote > :last-child { margin-bottom: 0; }
img { max-width: 100%; height: auto; }
.content img { background: #fff; border-radius: .45rem; }
.image-left, .image-center { display: block; margin: 1.2rem auto; }
.module-icon { float: left; width: 40px; margin: .25rem .8rem .5rem 0; }
.signup-image { display: block; width: 160px; margin: 1.1rem auto 0; }
.course-link { display: inline-block; font-weight: 650; border: 1px solid var(--accent); border-radius: .5rem; padding: .65rem 1rem; margin-top: .4rem; }
.course-section { display: flow-root; padding: 1.8rem 0; border-bottom: 1px solid var(--line); }
.course-section:first-child { padding-top: 0; }
.course-section:last-child { border-bottom: 0; padding-bottom: 0; }
.module-grid { display: grid; gap: 1.25rem; margin: 1.8rem 0 2.5rem; }
.module-card { padding: 1rem; background: var(--bg); border: 1px solid var(--line); border-radius: .7rem; }
.module-card h3 { margin: 0 0 1rem; font-size: 1.05rem; }
.module-card p, .module-card img { margin: 0; }
.module-card a { display: block; }
.module-card img { width: 100%; display: block; }
.home .page-heading, .home .content { max-width: 1160px; }
.home .page-heading { padding-top: 2.1rem; padding-bottom: 1.8rem; }
.home h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.home .content { background: none; border: 0; padding-top: 0; }
.home-features { display: grid; gap: 1.1rem; }
.feature { display: block; background: #fff; border-radius: .8rem; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); transition: transform .18s ease, box-shadow .18s ease; }
.feature:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgb(23 49 74 / 13%); }
.feature img { display: block; width: 100%; border-radius: 0; }
.home-boxes { display: grid; gap: 1.1rem; margin-top: 2.1rem; }
.home-box { background: var(--surface); border: 1px solid var(--line); border-radius: .8rem; padding: 1.7rem; }
.home-box img { display: block; width: auto; height: 85px; margin: 0 0 1.5rem; padding: .45rem; border-radius: .6rem; }
.home-box p { margin: 0; font-size: .97rem; }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { max-width: 1160px; margin: auto; padding: 1.7rem 1.25rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 2rem; font-size: .9rem; }
.footer-inner p { margin: 0; color: var(--muted); }
.social-links { display: flex; gap: 1.5rem; }
.social-links a { color: var(--heading); text-decoration: none; }
.social-links a:hover { color: var(--accent); text-decoration: underline; }
@media (min-width: 600px) {
  .content { padding: 2.25rem 2.6rem 3rem; border: 1px solid var(--line); border-radius: .8rem; box-shadow: var(--shadow); }
  .page-heading { padding-left: 0; padding-right: 0; width: calc(100% - 3rem); }
  .content { width: calc(100% - 3rem); }
  .image-left { float: left; margin: .4rem 1.6rem 1rem 0; max-width: 45%; }
  .image-center { margin: 1.4rem auto; }
  .signup-image { margin-left: 0; }
  .module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-215 .content { max-width: 1000px; }
  .page-215 .content > p, .page-215 .content > ul { max-width: 72ch; }
  .home .content { padding: 0 0 2rem; box-shadow: none; }
  .home-features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature:first-child { grid-column: 1 / -1; }
}
@media (min-width: 820px) {
  .home-boxes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1060px) {
  .header-inner { flex-wrap: nowrap; padding-top: 1.3rem; padding-bottom: 1.3rem; }
  .brand img { width: 205px; }
  .nav-ready .menu-toggle { display: none; }
  nav, .nav-ready nav:not(.is-open) { display: block; width: auto; }
  .nav-list { flex-direction: row; gap: .3rem; align-items: center; }
  .nav-list a { padding: .7rem .75rem; }
  .nav-list a[aria-current] { box-shadow: inset 0 -2px var(--accent); }
  .has-submenu { position: relative; }
  .submenu { position: absolute; top: 100%; left: 0; min-width: 245px; z-index: 5; visibility: hidden; opacity: 0; background: var(--surface); border: 1px solid var(--line); border-radius: .5rem; box-shadow: var(--shadow); padding: .45rem; margin: 0; }
  .has-submenu:hover .submenu, .has-submenu:focus-within .submenu { visibility: visible; opacity: 1; }
  .page-heading { padding-top: 3.6rem; padding-bottom: 2rem; }
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111b26; --surface: #192633; --text: #dae3eb; --heading: #f1f6fa; --muted: #b3c3d1; --line: #354657; --accent: #7bcbe9; --accent-soft: #213e50; --warm: #f39265; --shadow: 0 12px 36px rgb(0 0 0 / 12%); }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; } }
@media print {
  .menu-toggle, .site-header nav, .skip-link, .social-links { display: none; }
  body, .content { background: #fff; color: #000; }
  .content { border: 0; box-shadow: none; width: 100%; max-width: none; }
  .page-heading { padding-top: 1rem; }
  a { color: #000; }
}