/* process-improve docs: brand colours and the landing page (docs/index.rst).

   The colours are the README banner's: blue design points and a red centre
   point, with the lighter versions the dark banner uses. Everything else reads
   the theme's own --pst-color-* properties, so light and dark mode both work. */

html[data-theme="light"] {
  --pst-color-primary: #1f5f8f;
  --pst-color-primary-highlight: #174a70;
  --pst-color-secondary: #b03a2e;
  --pst-color-link: #1f5f8f;
  --pst-color-link-hover: #b03a2e;
}

html[data-theme="dark"] {
  --pst-color-primary: #4f93cf;
  --pst-color-primary-highlight: #79afdf;
  --pst-color-secondary: #dc614f;
  --pst-color-link: #4f93cf;
  --pst-color-link-hover: #dc614f;
}

/* -- Landing page ---------------------------------------------------------- */

/* docutils gives every ``.. container::`` the class "container", which the theme's
   Bootstrap styles give a maximum width and no side padding; undo both here. */
.pi-landing div.container {
  max-width: none;
  margin-left: 0;
  margin-right: 0;
  padding-left: 0;
  padding-right: 0;
}

.pi-landing > h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.pi-landing > h1 .headerlink {
  display: none;
}

.pi-tagline {
  font-size: 1.3rem;
  line-height: 1.5;
  color: var(--pst-color-text-muted);
  max-width: 48rem;
}

.pi-landing img.pi-banner {
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--pst-color-border);
  border-radius: 14px;
  margin: 1.25rem 0 1.5rem;
}

.pi-install pre {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.6rem 1rem;
  font-size: 1rem;
  border-radius: 8px;
}

/* A row of links, drawn as buttons; the first is the main one. */
.pi-buttons p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 0.25rem 0 2.5rem;
}

.pi-buttons a {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border: 1.5px solid var(--pst-color-primary);
  border-radius: 8px;
  color: var(--pst-color-primary);
  font-weight: 600;
  text-decoration: none;
}

.pi-buttons a:hover {
  background: var(--pst-color-primary);
  color: var(--pst-color-background);
}

.pi-buttons a:first-child {
  background: var(--pst-color-primary);
  color: var(--pst-color-background);
}

.pi-buttons a:first-child:hover {
  background: var(--pst-color-primary-highlight);
  border-color: var(--pst-color-primary-highlight);
}

/* Cards: each one is a link to the guide for that part of the package. */
.pi-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1rem;
  margin: 1rem 0 2.5rem;
}

.pi-landing div.pi-card.container {
  position: relative;
  padding: 1.1rem 1.25rem 0.9rem;
  border: 1px solid var(--pst-color-border);
  border-radius: 12px;
  background: var(--pst-color-surface);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.pi-card:hover {
  border-color: var(--pst-color-primary);
  box-shadow: 0 6px 18px rgb(0 0 0 / 8%);
  transform: translateY(-2px);
}

.pi-card .pi-icon {
  font-size: 1.5rem;
  color: var(--pst-color-primary);
}

.pi-landing .pi-card p.rubric {
  margin: 0.45rem 0 0.35rem;
  padding: 0;
  border-bottom: none;
  font-size: 1.12rem;
  font-weight: 700;
}

.pi-card p {
  margin-bottom: 0.5rem;
}

/* The card's link covers the whole card. */
.pi-card a.reference::after {
  content: "";
  position: absolute;
  inset: 0;
}

.pi-card a.reference {
  font-weight: 600;
  text-decoration: none;
}

/* Two columns, picture and words, for the app and the textbook sections. */
.pi-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 1.75rem;
  align-items: center;
  margin: 1rem 0 2.5rem;
}

.pi-feature img {
  width: 100%;
  border: 1px solid var(--pst-color-border);
  border-radius: 12px;
}

@media (max-width: 800px) {
  .pi-landing > h1 {
    font-size: 2.3rem;
  }

  .pi-tagline {
    font-size: 1.12rem;
  }

  .pi-feature {
    grid-template-columns: 1fr;
  }
}