:root {
  --ai-ink: #0b0b0d;
  --ai-paper: #ffffff;
  --ai-teal: #0e7c86;
  --ai-sage: #5c7f58;
  --ai-lime: #5e8a00;
  --ai-teal-soft: rgba(14, 124, 134, 0.12);
  --ai-sage-soft: rgba(92, 127, 88, 0.12);
  --ai-lime-soft: rgba(94, 138, 0, 0.12);
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: var(--ai-paper);
  --md-default-fg-color: var(--ai-ink);
  --md-default-fg-color--light: rgba(11, 11, 13, 0.72);
  --md-default-fg-color--lighter: rgba(11, 11, 13, 0.56);
  --md-typeset-a-color: var(--ai-teal);
  --md-accent-fg-color: var(--ai-lime);
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: var(--ai-ink);
  --md-default-fg-color: var(--ai-paper);
  --md-default-fg-color--light: rgba(255, 255, 255, 0.74);
  --md-default-fg-color--lighter: rgba(255, 255, 255, 0.54);
  --md-typeset-a-color: #7fe1dd;
  --md-accent-fg-color: #c5e866;
}

html,
body {
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font-family: "Mona Sans", Calibri, "Segoe UI", Arial, sans-serif;
}

.md-main,
.md-content,
.md-content__inner {
  background: transparent;
}

.md-tabs__inner {
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.md-tabs__list {
  display: flex;
  flex-wrap: nowrap;
  width: max-content;
  min-width: 100%;
}

.md-tabs__item {
  flex: 0 0 auto;
}

.md-typeset {
  font-size: 0.98rem;
  line-height: 1.7;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  letter-spacing: -0.03em;
}

.md-typeset a:focus-visible,
.chapter-card:focus-visible,
.button:focus-visible {
  outline: 3px solid var(--ai-teal);
  outline-offset: 4px;
}

.home-hero {
  padding: clamp(1.25rem, 4vw, 2rem);
  border-radius: 1.75rem;
  margin: 0.25rem 0 1.5rem;
  background:
    radial-gradient(circle at top right, var(--ai-lime-soft), transparent 28%),
    radial-gradient(circle at bottom left, var(--ai-teal-soft), transparent 32%),
    linear-gradient(180deg, rgba(92, 127, 88, 0.24), rgba(14, 124, 134, 0.08));
  border: 1px solid rgba(127, 127, 127, 0.18);
}

[data-md-color-scheme="slate"] .home-hero {
  background:
    radial-gradient(circle at top right, rgba(197, 232, 102, 0.14), transparent 28%),
    radial-gradient(circle at bottom left, rgba(79, 209, 197, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

.home-hero__panel {
  max-width: 44rem;
  margin: 0 auto;
  text-align: center;
}

.home-hero__eyebrow,
.chapter-card__tag,
.chapter-meta {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ai-teal);
}

.home-hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 0.95;
}

.home-hero__lede {
  max-width: 38rem;
  margin: 1rem auto 1.5rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--md-default-fg-color--light);
}

.home-hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--ai-teal);
  color: var(--ai-paper);
  box-shadow: 0 0.75rem 1.5rem rgba(14, 124, 134, 0.22);
}

.button--secondary {
  background: transparent;
  color: var(--md-default-fg-color);
  border-color: rgba(127, 127, 127, 0.3);
}

.home-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 0 1.5rem;
}

.home-strip > div {
  padding: 1rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(127, 127, 127, 0.16);
  background: rgba(92, 127, 88, 0.08);
}

[data-md-color-scheme="slate"] .home-strip > div {
  background: rgba(255, 255, 255, 0.03);
}

.home-strip strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.home-strip span {
  color: var(--md-default-fg-color--light);
}

.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.25rem;
}

.chapter-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border-radius: 1.25rem;
  overflow: hidden;
  border: 1px solid rgba(127, 127, 127, 0.16);
  background: rgba(127, 127, 127, 0.03);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 0.7rem 2rem rgba(0, 0, 0, 0.06);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

[data-md-color-scheme="slate"] .chapter-card {
  box-shadow: 0 0.75rem 1.6rem rgba(0, 0, 0, 0.38);
}

.chapter-card:hover {
  transform: translateY(-3px);
  border-color: rgba(14, 124, 134, 0.6);
  box-shadow: 0 1rem 2rem rgba(14, 124, 134, 0.14);
}

.chapter-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #111;
}

.chapter-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1rem 1.15rem;
}

.chapter-card__title {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.1;
}

.chapter-card__description {
  margin: 0;
  color: var(--md-default-fg-color--light);
}

.chapter-meta {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.sn-hero {
  margin: 0 0 1.5rem;
}

.sn-hero img {
  display: block;
  width: 100%;
  border-radius: 1.25rem;
  border: 1px solid rgba(127, 127, 127, 0.18);
  box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.08);
}

.sn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-bottom: 0.65rem;
  font-weight: 700;
  text-decoration: none;
}

.sn-cat {
  display: inline-flex;
  margin-top: 0.75rem;
  padding: 0.34rem 0.75rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--ai-paper);
  background: var(--ai-teal);
}

[data-md-color-scheme="slate"] .sn-cat {
  color: var(--ai-ink);
  background: #7fe1dd;
}

.md-typeset h1 + p em {
  display: inline-block;
  margin-top: -0.25rem;
  margin-bottom: 1rem;
  color: var(--md-default-fg-color--light);
}

.md-typeset h2 {
  margin-top: 1.9rem;
}

.md-typeset blockquote {
  border-left-color: var(--ai-teal);
}

.md-typeset ul {
  padding-left: 1.15rem;
}

.md-typeset li::marker {
  color: var(--ai-lime);
}

.md-typeset hr {
  border-bottom-color: rgba(127, 127, 127, 0.25);
}

.chapter-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: 100%;
  margin-top: 2rem;
}

.chapter-nav__button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 2.7rem;
  padding: 0.7rem 1rem;
  min-width: 13.5rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.chapter-nav__button:first-child {
  margin-right: auto;
}

.chapter-nav__button:last-child {
  margin-left: auto;
}

.chapter-nav__button:hover {
  transform: translateY(-1px);
}

.chapter-nav__button--primary {
  background: var(--ai-teal);
  color: var(--ai-paper);
  box-shadow: 0 0.6rem 1.2rem rgba(14, 124, 134, 0.2);
}

.chapter-nav__button--secondary {
  background: transparent;
  color: var(--md-default-fg-color);
  border-color: rgba(127, 127, 127, 0.3);
}

[data-md-color-scheme="slate"] .chapter-nav__button--primary {
  color: var(--ai-ink);
  background: #7fe1dd;
}

[data-md-color-scheme="slate"] .chapter-nav__button--secondary {
  border-color: rgba(255, 255, 255, 0.25);
}

.chapter-nav__button:focus-visible {
  outline: 3px solid var(--ai-teal);
  outline-offset: 3px;
}

.chapter-panel {
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(127, 127, 127, 0.16);
  background: rgba(14, 124, 134, 0.05);
}

[data-md-color-scheme="slate"] .chapter-panel {
  background: rgba(255, 255, 255, 0.03);
}

@media (max-width: 900px) {
  .home-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .home-hero {
    padding: 1rem;
    border-radius: 1.25rem;
  }

  .home-hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .chapter-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .chapter-nav__button {
    width: 100%;
    min-width: 0;
  }

  .chapter-nav__button:first-child,
  .chapter-nav__button:last-child {
    margin: 0;
  }
}