:root {
  --chapter-radius: 12px;
  --chapter-gap: 1rem;
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #ffffff;
  --md-default-fg-color: #000000;
  --md-default-fg-color--light: #000000;
  --md-default-fg-color--lighter: #000000;
  --md-typeset-a-color: #005cc5;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #000000;
  --md-default-fg-color: #ffffff;
  --md-default-fg-color--light: #ffffff;
  --md-default-fg-color--lighter: #ffffff;
  --md-typeset-a-color: #58a6ff;
}

.md-typeset,
.md-header,
.md-tabs,
.md-nav,
.md-footer {
  font-weight: 500;
}

.hero-image {
  width: 100%;
  border-radius: var(--chapter-radius);
  border: 2px solid currentColor;
  margin-bottom: 1rem;
}

.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--chapter-gap);
  margin-top: 1.2rem;
}

.chapter-card {
  display: block;
  color: inherit !important;
  text-decoration: none;
  border: 2px solid currentColor;
  border-radius: var(--chapter-radius);
  padding: 0.9rem;
  background: transparent;
}

.chapter-card img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 2px solid currentColor;
}

.chapter-card:focus,
.chapter-card:hover {
  outline: 3px solid currentColor;
  outline-offset: 2px;
}

.chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: space-between;
  margin-top: 2rem;
}

.chapter-nav a {
  border: 2px solid currentColor;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  text-decoration: none;
}