:root {
  --navy: #102c2c;
  --navy-deep: #071d1d;
  --navy-light: #153f3b;
  --gold: #9a6721;
  --gold-light: #c99a52;
  --gold-header: #a87328;
  --gray-50: #f8f7f2;
  --gray-100: #f1f1eb;
  --gray-200: #dde1d9;
  --gray-500: #62716e;
  --gray-700: #294440;
  --ai-ink: #102c2c;
  --ai-ink-deep: #071d1d;
  --ai-ink-soft: #28504c;
  --ai-accent: #b98235;
  --ai-accent-strong: #82571f;
  --ai-accent-soft: #ead8b8;
  --ai-paper: #f8f7f2;
  --ai-line: rgba(16, 44, 44, 0.16);
  --ai-white: #fff;
}

html {
  scroll-padding-top: 90px;
}

body.ai-learning-site {
  padding-top: 78px;
  color: var(--ai-ink);
  background: var(--ai-paper);
}

body.ai-learning-site .hero,
body.ai-learning-site .catalog-hero,
body.ai-learning-site .course-hero {
  background: linear-gradient(135deg, var(--ai-ink-deep) 0%, var(--ai-ink) 58%, #174b45 100%);
}

body.ai-learning-site .cat-nav {
  top: 78px;
  max-width: 100vw;
  overflow-x: auto;
  overflow-y: hidden;
  contain: inline-size;
}

body.ai-learning-site > .site-footer {
  display: none;
}

.ai-skip-link {
  position: fixed;
  z-index: 10002;
  top: 8px;
  left: 8px;
  padding: 0.7rem 1rem;
  transform: translateY(-150%);
  border-radius: 6px;
  color: var(--ai-white);
  background: var(--ai-ink-deep);
}

.ai-skip-link:focus {
  transform: translateY(0);
}

.ai-learning-header {
  position: fixed;
  z-index: 10000;
  top: 0;
  right: 0;
  left: 0;
  height: 78px;
  border-bottom: 1px solid var(--ai-line);
  background: rgba(248, 247, 242, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.ai-learning-header__inner {
  display: flex;
  align-items: center;
  width: min(1360px, calc(100% - 48px));
  height: 100%;
  margin: 0 auto;
  gap: 2rem;
}

.ai-learning-brand {
  display: inline-flex;
  align-items: center;
  color: var(--ai-ink) !important;
  text-decoration: none !important;
  gap: 0.75rem;
}

.ai-learning-brand__logo { display: block; width: 44px; height: 44px; border-radius: 50%; flex: none; }
.ai-learning-brand__wordmark { display: block; width: 88px; height: 40px; flex: none; }
.ai-learning-footer .ai-learning-brand__wordmark { filter: brightness(0) invert(1); }
.ai-learning-brand__division { border-left: 1px solid var(--ai-line); padding-left: 0.75rem; color: var(--ai-ink-soft); font: 650 .69rem/1.2 system-ui, sans-serif; letter-spacing: .12em; text-transform: uppercase; }

.ai-learning-brand__name {
  display: grid;
  font: 750 0.94rem/1.05 system-ui, sans-serif;
  letter-spacing: -0.025em;
}

.ai-learning-brand__name small {
  margin-top: 0.28rem;
  color: var(--ai-ink-soft);
  font-size: 0.69rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.ai-learning-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 0.35rem;
}

.ai-learning-nav a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 0.9rem;
  border-radius: 7px;
  color: var(--ai-ink) !important;
  font: 700 0.82rem/1 system-ui, sans-serif;
  text-decoration: none !important;
  transition: background 160ms ease, transform 160ms ease;
}

.ai-learning-nav a:hover {
  background: rgba(16, 44, 44, 0.07);
  transform: translateY(-1px);
}

.ai-learning-nav .ai-nav-account {
  margin-left: 0.5rem;
  border: 1px solid var(--ai-line);
}

.ai-learning-nav .ai-nav-primary {
  color: var(--ai-ink-deep) !important;
  background: var(--ai-accent);
}

.ai-learning-nav .ai-nav-primary:hover {
  background: #c99a52;
}

.ai-learning-menu {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 1px solid var(--ai-line);
  border-radius: 7px;
  color: var(--ai-ink);
  background: transparent;
  font: 800 1.25rem/1 system-ui, sans-serif;
}

.ai-learning-footer {
  color: rgba(255, 255, 255, 0.78);
  background: var(--ai-ink-deep);
}

.ai-learning-footer__inner {
  display: grid;
  grid-template-columns: minmax(250px, 1.5fr) repeat(2, minmax(150px, 0.55fr));
  width: min(1360px, calc(100% - 48px));
  margin: 0 auto;
  padding: 4rem 0 2rem;
  gap: 3rem;
}

.ai-learning-footer h2 {
  max-width: 540px;
  margin: 1.2rem 0 0;
  color: var(--ai-white);
  font: 700 clamp(2rem, 4vw, 3.6rem)/0.98 Georgia, serif;
  letter-spacing: -0.045em;
}

.ai-learning-footer h3 {
  margin: 0 0 1rem;
  color: var(--ai-white);
  font: 750 0.75rem/1 system-ui, sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.ai-learning-footer a {
  display: block;
  width: fit-content;
  margin: 0.75rem 0;
  color: rgba(255, 255, 255, 0.78) !important;
  text-decoration: none !important;
}

.ai-learning-footer a:hover {
  color: var(--ai-accent) !important;
}

.ai-learning-footer__legal {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1.3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font: 600 0.72rem/1.4 system-ui, sans-serif;
}

body.ai-learning-site .course-card,
body.ai-learning-site [class*="course-card"],
body.ai-learning-site .pathway-card,
body.ai-learning-site .module-card {
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(7, 29, 29, 0.08);
}

body.ai-learning-site .card-body h3 {
  font-size: 1rem;
}

body.ai-learning-site .card-body p {
  font-size: 0.875rem;
}

body.ai-learning-site a:focus-visible,
body.ai-learning-site button:focus-visible {
  outline: 3px solid #2d7b72;
  outline-offset: 3px;
}

body.ai-learning-site .card-price.free,
body.ai-learning-site .card-tag.green,
body.ai-learning-site .price-option .save {
  color: #17756f;
}

body.ai-learning-site .card-tag.green {
  background: rgba(23, 117, 111, 0.11);
}

body.ai-learning-site .pricing-banner .price-option .save {
  color: #c9ddd8;
}

/* Course identity system: one visual grammar, varied by pathway and course. */
.ai-course-art {
  --art-ink: #f7f4eb;
  --art-accent: #c58b3a;
  --art-accent-2: #69a49d;
  position: relative;
  display: grid;
  width: 100%;
  height: 160px;
  overflow: hidden;
  isolation: isolate;
  color: var(--art-ink);
  background:
    radial-gradient(circle at 82% 18%, color-mix(in srgb, var(--art-accent) 32%, transparent), transparent 38%),
    linear-gradient(145deg, #071d1d, #123a37 62%, #1d504b);
}

.ai-course-art::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(115deg, #000, transparent 76%);
}

.ai-course-art svg {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 68%;
  height: calc(100% - 16px);
  overflow: visible;
  transition: transform 320ms ease-out;
}

.course-card:hover .ai-course-art svg {
  transform: translate3d(0, -3px, 0) scale(1.025);
}

.ai-course-art__label,
.ai-course-art__code {
  position: absolute;
  left: 16px;
  z-index: 2;
  font-family: ui-sans-serif, system-ui, sans-serif;
  text-transform: uppercase;
}

.ai-course-art__label {
  top: 16px;
  max-width: 42%;
  color: color-mix(in srgb, var(--art-ink) 72%, transparent);
  font-size: 0.62rem;
  font-weight: 760;
  line-height: 1.25;
  letter-spacing: 0.13em;
}

.ai-course-art__code {
  bottom: 15px;
  color: var(--art-ink);
  font-size: 1.14rem;
  font-weight: 820;
  letter-spacing: -0.035em;
}

.ai-course-art--foundation {
  --art-accent: #d39c51;
  --art-accent-2: #6ba69d;
  background: linear-gradient(145deg, #183235, #28534f 66%, #466f68);
}

.ai-course-art--executive {
  --art-accent: #d4a25a;
  --art-accent-2: #a9c9c3;
  background: linear-gradient(145deg, #071b24, #123642 60%, #284b55);
}

.ai-course-art--functional {
  --art-accent: #d4785f;
  --art-accent-2: #75b6ac;
  background: linear-gradient(145deg, #162b31, #244c50 62%, #3f6865);
}

.ai-course-art--industry {
  --art-accent: #c98c45;
  --art-accent-2: #83aeba;
  background: linear-gradient(145deg, #182832, #304955 60%, #49636b);
}

.ai-course-art--strategy {
  --art-accent: #d2a44f;
  --art-accent-2: #66a2a2;
  background: linear-gradient(145deg, #102530, #1f4550 62%, #365e62);
}

.ai-course-art--ethics {
  --art-accent: #d19472;
  --art-accent-2: #b5c2a8;
  background: linear-gradient(145deg, #2b2028, #4b3540 62%, #62505a);
}

.ai-course-art--advanced {
  --art-accent: #b896d4;
  --art-accent-2: #6bb4b5;
  background: linear-gradient(145deg, #181f3a, #29385a 62%, #405170);
}

.ai-release-note {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  margin-top: 0.7rem;
  padding: 0.3rem 0.55rem;
  border: 1px solid rgba(16, 44, 44, 0.16);
  border-radius: 999px;
  color: #31534f;
  background: #f3efe6;
  font: 720 0.72rem/1.15 system-ui, sans-serif;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

@media (max-width: 600px) {
  .ai-course-art {
    height: 145px;
  }
}

@media (max-width: 900px) {
  .ai-learning-header__inner,
  .ai-learning-footer__inner {
    width: min(100% - 30px, 1360px);
  }

  .ai-learning-menu {
    display: grid;
    place-items: center;
  }

  .ai-learning-nav {
    position: absolute;
    top: 70px;
    right: 15px;
    left: 15px;
    display: none;
    align-items: stretch;
    padding: 0.75rem;
    border: 1px solid var(--ai-line);
    border-radius: 10px;
    background: var(--ai-paper);
    box-shadow: 0 18px 40px rgba(7, 29, 29, 0.16);
  }

  .ai-learning-header[data-open="true"] .ai-learning-nav {
    display: grid;
  }

  .ai-learning-nav a {
    justify-content: flex-start;
  }

  .ai-learning-nav .ai-nav-account {
    margin: 0.3rem 0 0;
  }

  .ai-learning-footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .ai-learning-footer__lead,
  .ai-learning-footer__legal {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .ai-learning-brand__division { display: none; }
  body.ai-learning-site {
    padding-top: 68px;
  }

  .ai-learning-header {
    height: 68px;
  }

  body.ai-learning-site .cat-nav {
    top: 68px;
  }

  .ai-learning-brand__name {
    font-size: 0.82rem;
  }

  .ai-learning-footer__inner {
    grid-template-columns: 1fr;
    padding-top: 3rem;
    gap: 2rem;
  }

  .ai-learning-footer__lead,
  .ai-learning-footer__legal {
    grid-column: auto;
  }

  .ai-learning-footer__legal {
    display: grid;
    gap: 0.5rem;
  }

  body.ai-learning-site .price-option {
    width: 100%;
    min-width: 0;
  }
}

@media (max-width: 260px) {
  html,
  body.ai-learning-site {
    overflow-x: clip;
  }

  .ai-learning-header__inner,
  .ai-learning-footer__inner {
    width: calc(100% - 20px);
  }

  body.ai-learning-site .container {
    padding-inline: 10px;
  }

  body.ai-learning-site .cat-section,
  body.ai-learning-site .pricing-banner,
  body.ai-learning-site .catalog-hero {
    padding-inline: 10px;
  }

  body.ai-learning-site .price-option .price span {
    display: block;
    margin-top: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-learning-nav a,
  .ai-skip-link,
  .ai-course-art svg {
    transition: none;
  }
}