/* Task-oriented documentation UX layer.
   Kept separate from the product/API styles so it can evolve without
   changing the scientific package surface. */

:root {
  --gp-surface-1: color-mix(in srgb, var(--md-default-bg-color) 94%, var(--md-primary-fg-color) 6%);
  --gp-surface-2: color-mix(in srgb, var(--md-default-bg-color) 90%, var(--md-accent-fg-color) 10%);
  --gp-focus-ring: color-mix(in srgb, var(--md-accent-fg-color) 78%, white 22%);
  --gp-radius-lg: 1rem;
  --gp-radius-xl: 1.35rem;
}

.md-typeset a:focus-visible,
.md-typeset button:focus-visible,
.md-typeset .md-button:focus-visible,
.gp-card-link:focus-visible,
.gp-route-card:focus-visible,
.gp-visual-card:focus-visible,
.gp-mini-grid a:focus-visible,
.gp-jump-nav a:focus-visible {
  outline: 3px solid var(--gp-focus-ring);
  outline-offset: 3px;
  border-radius: 0.45rem;
}

.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  scroll-margin-top: 6rem;
}

.md-typeset table:not([class]) {
  border-radius: 0.7rem;
  overflow: hidden;
}

.md-typeset .md-typeset__table {
  width: 100%;
}

.md-typeset .md-typeset__table table {
  width: 100%;
}

.gp-page-intro {
  max-width: 58rem;
  margin: -0.35rem 0 1.5rem;
  font-size: 1.04rem;
  line-height: 1.7;
  color: var(--md-default-fg-color--light);
}

.gp-route-grid,
.gp-visual-grid,
.gp-guide-grid,
.gp-metric-grid {
  display: grid;
  gap: 1rem;
  margin: 1rem 0 2rem;
}

.gp-route-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gp-guide-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gp-visual-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gp-metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.gp-status-grid-home {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gp-route-card,
.gp-guide-card,
.gp-visual-card,
.gp-metric-card,
.gp-visual-grid > figure {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--gp-card-border);
  border-radius: var(--gp-radius-lg);
  background: linear-gradient(180deg, var(--gp-surface-1), var(--md-default-bg-color));
}

.gp-route-card,
.gp-guide-card {
  padding: 1.15rem 1.2rem;
}

.gp-route-card {
  display: block;
  min-height: 10rem;
  color: inherit !important;
  text-decoration: none !important;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.gp-route-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0.22rem;
  background: var(--md-accent-fg-color);
  opacity: 0.78;
}

.gp-route-card:hover,
.gp-visual-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--md-accent-fg-color) 55%, var(--gp-card-border));
  box-shadow: var(--gp-shadow);
}

.gp-route-label,
.gp-eyebrow,
.gp-chip {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 760;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.gp-route-label,
.gp-eyebrow {
  padding: 0.24rem 0.5rem;
  background: var(--gp-accent-bg);
  color: var(--md-accent-fg-color);
}

.gp-route-card h3,
.gp-guide-card h3 {
  margin: 0.6rem 0 0.4rem;
}

.gp-route-card p,
.gp-guide-card p {
  margin: 0;
  line-height: 1.55;
}

.gp-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.8rem 0 1.4rem;
}

.gp-chip {
  padding: 0.28rem 0.58rem;
  border: 1px solid var(--gp-soft-border);
  background: var(--gp-surface-1);
  color: var(--md-default-fg-color--light);
}

.gp-jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.6rem;
  padding: 0.7rem;
  border: 1px solid var(--gp-soft-border);
  border-radius: var(--gp-radius-lg);
  background: var(--gp-surface-1);
}

.gp-jump-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.35rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--md-default-fg-color) !important;
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none !important;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.gp-jump-nav a:hover {
  border-color: var(--gp-soft-border);
  background: var(--md-default-bg-color);
}

.gp-visual-card {
  display: block;
  color: inherit !important;
  text-decoration: none !important;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.gp-visual-card img,
.gp-visual-grid > figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--gp-surface-1);
}

.gp-visual-grid > figure {
  margin: 0;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.gp-visual-grid > figure:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--md-accent-fg-color) 45%, var(--gp-card-border));
  box-shadow: var(--gp-shadow);
}

.gp-visual-grid > figure figcaption {
  padding: 0.85rem 0.95rem 1rem;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--md-default-fg-color--light);
}

.gp-visual-grid > figure figcaption strong {
  color: var(--md-default-fg-color);
}

.gp-visual-card-body {
  padding: 0.85rem 0.95rem 1rem;
}

.gp-visual-card-body strong,
.gp-visual-card-body span {
  display: block;
}

.gp-visual-card-body span {
  margin-top: 0.24rem;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--md-default-fg-color--light);
}

.gp-metric-card {
  padding: 0.85rem 0.95rem;
}

.gp-metric-card strong,
.gp-metric-card span {
  display: block;
}

.gp-metric-card strong {
  font-size: 1.1rem;
}

.gp-metric-card span {
  margin-top: 0.15rem;
  font-size: 0.73rem;
  line-height: 1.3;
  color: var(--md-default-fg-color--light);
}

.gp-actions .md-button {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.gp-mini-grid a {
  min-height: 2.9rem;
  display: flex;
  align-items: center;
}

.gp-steps {
  counter-reset: gp-step;
  display: grid;
  gap: 0.8rem;
  margin: 1rem 0 1.8rem;
}

.gp-step {
  position: relative;
  padding: 1rem 1rem 1rem 3.6rem;
  border: 1px solid var(--gp-soft-border);
  border-radius: 0.85rem;
  background: var(--md-default-bg-color);
}

.gp-step::before {
  counter-increment: gp-step;
  content: counter(gp-step, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--md-accent-fg-color);
  font-weight: 800;
  letter-spacing: 0.05em;
}

.gp-step strong {
  display: block;
  margin-bottom: 0.2rem;
}

.gp-decision {
  margin: 1rem 0 1.7rem;
  padding: 1rem 1.1rem;
  border: 1px solid color-mix(in srgb, var(--md-accent-fg-color) 35%, var(--gp-card-border));
  border-radius: var(--gp-radius-lg);
  background: linear-gradient(135deg, var(--gp-accent-bg), transparent);
}

.gp-code-path {
  display: inline-block;
  padding: 0.15rem 0.4rem;
  border-radius: 0.38rem;
  background: var(--gp-surface-1);
  font-family: var(--md-code-font-family);
  font-size: 0.78em;
}

.gp-gallery figure,
.gp-feature-gallery figure {
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.gp-gallery figure:hover,
.gp-feature-gallery figure:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--md-accent-fg-color) 45%, var(--gp-card-border));
  box-shadow: var(--gp-shadow);
}

.gp-gallery figcaption strong {
  color: var(--md-default-fg-color);
}

.gp-gallery-next {
  margin: -0.7rem 0 2rem;
  padding: 0.75rem 0.9rem;
  border-left: 0.2rem solid var(--md-accent-fg-color);
  border-radius: 0 0.65rem 0.65rem 0;
  background: var(--gp-surface-1);
  color: var(--md-default-fg-color--light);
  font-size: 0.82rem;
  line-height: 1.5;
}

.gp-gallery-next a {
  font-weight: 700;
}

.gp-science-boundary {
  margin: 1.2rem 0;
  padding: 0.9rem 1rem;
  border-left: 0.25rem solid var(--md-primary-fg-color);
  background: color-mix(in srgb, var(--md-primary-fg-color) 6%, transparent);
  border-radius: 0.25rem 0.75rem 0.75rem 0.25rem;
}

@media (max-width: 900px) {
  .gp-status-grid-home,
  .gp-guide-grid,
  .gp-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 650px) {
  .gp-route-grid,
  .gp-guide-grid,
  .gp-visual-grid,
  .gp-metric-grid,
  .gp-status-grid-home {
    grid-template-columns: 1fr;
  }

  .gp-route-card {
    min-height: 0;
  }

  .gp-actions .md-button {
    flex: 1 1 100%;
    width: 100%;
  }

  .gp-jump-nav {
    gap: 0.4rem;
    padding: 0.55rem;
  }

  .gp-jump-nav a {
    flex: 1 1 calc(50% - 0.4rem);
    justify-content: center;
    min-height: 2.65rem;
    text-align: center;
  }

  .gp-landing-hero h1 {
    font-size: clamp(2rem, 12vw, 3rem);
    line-height: 1.02;
  }
}

@media (max-width: 420px) {
  .gp-jump-nav a {
    flex-basis: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .gp-card-link,
  .gp-route-card,
  .gp-visual-card,
  .gp-visual-grid > figure,
  .gp-gallery figure,
  .gp-feature-gallery figure,
  .gp-jump-nav a {
    transition: none;
  }

  .gp-card-link:hover,
  .gp-route-card:hover,
  .gp-visual-card:hover,
  .gp-visual-grid > figure:hover,
  .gp-gallery figure:hover,
  .gp-feature-gallery figure:hover {
    transform: none;
  }
}

@media (prefers-contrast: more) {
  .gp-route-card,
  .gp-guide-card,
  .gp-visual-card,
  .gp-metric-card,
  .gp-visual-grid > figure,
  .gp-status-grid,
  .gp-card,
  .gp-pillar,
  .gp-jump-nav {
    border-color: currentColor;
  }
}