/* Jarvis Timeline — one component, three renderings. Everything keys off the
   wrapper modifier so the three DOM shapes share the icon, label and content
   rules. */

.jarvis-timeline {
  --jarvis-timeline-icon: 2rem; /* medium; size modifiers override */
  --jarvis-timeline-accent: var(--bs-primary, #2d6cdf);
}
.jarvis-timeline--icon-size-small { --jarvis-timeline-icon: 1.5rem; }
.jarvis-timeline--icon-size-medium { --jarvis-timeline-icon: 2rem; }
.jarvis-timeline--icon-size-large { --jarvis-timeline-icon: 3rem; }

.jarvis-timeline__icon {
  font-size: var(--jarvis-timeline-icon);
  line-height: 1;
  color: var(--jarvis-timeline-accent);
  flex: 0 0 auto;
}
/* icon = none: the step number in a circle the same size the glyph would be,
   so a partly-iconned set keeps one rhythm. */
.jarvis-timeline__icon--number {
  display: inline-grid;
  place-items: center;
  inline-size: var(--jarvis-timeline-icon);
  block-size: var(--jarvis-timeline-icon);
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: calc(var(--jarvis-timeline-icon) * 0.5);
  font-weight: 700;
}

.jarvis-timeline__label {
  font-weight: 600;
}

/* Editors paste tables and oversized images into the rich-text props. Contain
   them or they force the whole document to scroll sideways. */
.jarvis-timeline__content :is(img, table, iframe, pre, video) {
  max-width: 100%;
}
.jarvis-timeline__content img {
  height: auto;
}

/* --- Tabs --- */
.jarvis-timeline__nav .nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px; /* WCAG 2.2 target size; Jarvis holds 44, not the 24 minimum */
  white-space: nowrap;
  color: var(--bs-body-color);
}
.jarvis-timeline__nav .nav-link:hover {
  color: var(--bs-nav-link-hover-color);
}
.jarvis-timeline--icon-above .jarvis-timeline__nav .nav-link {
  flex-direction: column;
  gap: 0.35rem;
}
.jarvis-timeline__panels {
  padding-block-start: 1.5rem;
}
@media (prefers-reduced-motion: reduce) {
  .jarvis-timeline .tab-pane.fade {
    transition: none;
  }
}

/* --- Accordion --- */
.jarvis-timeline__item {
  border-block-end: 1px solid var(--bs-border-color, #dee2e6);
}
.jarvis-timeline__item:first-child {
  border-block-start: 1px solid var(--bs-border-color, #dee2e6);
}
.jarvis-timeline__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  padding-block: 0.75rem;
  cursor: pointer;
  list-style: none;
}
.jarvis-timeline__summary::-webkit-details-marker {
  display: none;
}
/* Chevron, rotated when open. */
.jarvis-timeline__summary::after {
  content: "";
  margin-inline-start: auto;
  inline-size: 0.6rem;
  block-size: 0.6rem;
  border-inline-end: 2px solid currentColor;
  border-block-end: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s;
}
.jarvis-timeline__item[open] .jarvis-timeline__summary::after {
  transform: rotate(-135deg);
}
.jarvis-timeline__item .jarvis-timeline__content {
  padding-block-end: 1rem;
}
@media (prefers-reduced-motion: reduce) {
  .jarvis-timeline__summary::after {
    transition: none;
  }
}

/* --- Vertical rail --- */
.jarvis-timeline__rail {
  margin: 0;
  padding: 0;
  list-style: none;
}
.jarvis-timeline__step {
  display: grid;
  /* minmax(0, 1fr) so a long unbroken string wraps instead of widening the grid */
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 1rem;
}
/* Two rows: the marker, then the connector filling whatever height is left.
   Grid rather than absolute positioning, so no fixed height is assumed. */
.jarvis-timeline__marker {
  display: grid;
  grid-template-rows: auto 1fr;
  justify-items: center;
  align-self: stretch;
}
.jarvis-timeline__step:not(:last-child) .jarvis-timeline__marker::after {
  content: "";
  grid-row: 2;
  inline-size: 2px;
  block-size: 100%;
  margin-block: 0.5rem;
  background: var(--bs-border-color, #dee2e6);
}
.jarvis-timeline__body {
  padding-block-end: 2rem;
}
.jarvis-timeline__rail .jarvis-timeline__label {
  margin-block: 0 0.5rem;
}

/* --- Tabs strip (all widths) ---
   Bootstrap's .nav-tabs wraps by default. Six tabs at 375px then become a
   three-line block that pushes the panel below the fold, so pin the strip to
   one line and let it scroll. These rules are unconditional — only the
   @media block further down is width-gated. */
.jarvis-timeline__nav {
  flex-wrap: nowrap;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scroll-padding-inline: 1rem;
  -webkit-overflow-scrolling: touch;
  /* Keep the platform's own affordance rather than hiding it and rebuilding an
     edge fade. iOS hides it until scroll anyway. */
  scrollbar-width: thin;
}
.jarvis-timeline__nav .nav-link {
  scroll-snap-align: start;
}
/* `safe` matters: a centred flex container that overflows puts its leading
   items out of reach of scrolling. */
.jarvis-timeline--align-center .jarvis-timeline__nav {
  justify-content: safe center;
}

/* A wide table or pre scrolls inside its own box instead of taking the
   document with it. */
.jarvis-timeline__content {
  overflow-x: auto;
}

@media (max-width: 767.98px) {
  /* A 48px icon above a label is a ~90px tall tab on a phone. */
  .jarvis-timeline--icon-size-large { --jarvis-timeline-icon: 2rem; }
  .jarvis-timeline--icon-size-medium { --jarvis-timeline-icon: 1.5rem; }

  .jarvis-timeline__step {
    gap: 0 0.75rem;
  }
  .jarvis-timeline__body {
    padding-block-end: 1.5rem;
  }
}

/* --- Coloured sections ---
   On a jarvis-bg--* parent the fixed accent can fail contrast (primary text on
   a primary fill vanishes). Fall back to the section's ADA-safe foreground,
   which jarvis_preprocess_html has already computed into --bs-body-color. */
:is(
  .jarvis-bg--primary,
  .jarvis-bg--secondary,
  .jarvis-bg--bg1,
  .jarvis-bg--bg2,
  .jarvis-bg--dark,
  .jarvis-bg--image
) .jarvis-timeline {
  --jarvis-timeline-accent: var(--bs-body-color);
}

/* Rules and the rail connector need to read on the coloured fill too. Follows
   the section's own ADA-safe foreground (--bs-body-color-rgb, set for every
   .jarvis-bg--* by overrides.css) rather than a fixed white, so it also works
   on --light where the foreground is black. */
:is(
  .jarvis-bg--primary,
  .jarvis-bg--secondary,
  .jarvis-bg--bg1,
  .jarvis-bg--bg2,
  .jarvis-bg--dark,
  .jarvis-bg--light,
  .jarvis-bg--image
) .jarvis-timeline__item {
  border-color: rgba(var(--bs-body-color-rgb), 0.25);
}
:is(
  .jarvis-bg--primary,
  .jarvis-bg--secondary,
  .jarvis-bg--bg1,
  .jarvis-bg--bg2,
  .jarvis-bg--dark,
  .jarvis-bg--light,
  .jarvis-bg--image
) .jarvis-timeline__step:not(:last-child) .jarvis-timeline__marker::after {
  background: rgba(var(--bs-body-color-rgb), 0.25);
}

/* Bootstrap's tab chrome is light-theme by default: a white active tab on a
   dark section reads as a hole. Retarget its custom properties. */
:is(
  .jarvis-bg--primary,
  .jarvis-bg--secondary,
  .jarvis-bg--bg1,
  .jarvis-bg--bg2,
  .jarvis-bg--dark,
  .jarvis-bg--light,
  .jarvis-bg--image
) .jarvis-timeline__nav {
  --bs-nav-tabs-border-color: rgba(var(--bs-body-color-rgb), 0.25);
  --bs-nav-tabs-link-active-color: var(--bs-body-color);
  --bs-nav-tabs-link-active-bg: transparent;
  --bs-nav-tabs-link-active-border-color: currentColor;
  --bs-nav-tabs-link-hover-border-color: rgba(var(--bs-body-color-rgb), 0.4);
}