/* ============================================================
   Kneller Hall feeder block (v3 banner) — schoolcms home module
   Everything is scoped under .kn-feeder. No font-family is declared,
   so headings and body copy pick up the host theme's fonts.

   SITE-WIDE TOKENS (set once in Additional CSS, on :root):
     --kn-brand      main brand colour (title, image backdrop)
                     falls back to --qr-brand (Quest slider) then #101034
     --kn-accent     second colour (pathway line, link arrows, slider arrows + dots); defaults to --kn-brand
     --kn-radius     corner radius of the card                  (default 0)
     --kn-ctrl-radius corner radius of slider arrows / dots     (default 50%)
     --kn-border     card border shorthand                      (default 1px solid, faint brand tint; use none to remove)
     --kn-surface    card background                            (default #fff)
     --kn-ink        body text colour on the card               (default #1a1a1a)
     --kn-max-width  max width of the block                     (default 875px)
     --kn-space-top / --kn-space-bottom   padding above / below the block's section (default 16px each)
     --kn-offset-top  margin-top of the section; use a NEGATIVE value to pull the block up
                      when the section above leaves a big empty tail   (default 0)

   Text colours that sit on a coloured fill (slider arrows) and brand colours
   used as text on the card are checked in JS (kneller-feeder.js) and flip to dark/light
   automatically if the brand colour would fail WCAG AA contrast.
   ============================================================ */


.kn-feeder {
  /* internal (computed) values — kneller-feeder.js may refine these for contrast */
  --kn-primary: var(--kn-brand, var(--qr-brand, #101034));
  --kn-secondary: var(--kn-accent, var(--kn-primary));
  --kn-on-primary: #fff;
  --kn-on-secondary: #fff;
  --kn-text-accent: var(--kn-primary);
  --kn-secondary-text: var(--kn-secondary);
  --kn-muted: color-mix(in srgb, var(--kn-ink, #1a1a1a) 78%, #fff);
  --kn-line: color-mix(in srgb, var(--kn-primary) 14%, transparent);
  --kn-heading-font: inherit;   /* kneller-feeder.js copies the theme heading font here */

  max-width: var(--kn-max-width, 875px);
  margin: 0 auto;
  container-type: inline-size;   /* layout follows the column width, so it works in narrow inner-page columns too */
  color: var(--kn-ink, #1a1a1a);
  -webkit-font-smoothing: antialiased;
}
.kn-feeder *,
.kn-feeder *::before,
.kn-feeder *::after { box-sizing: border-box; }

/* The dispatcher's <section>: spacing controls + hide it when the block rendered nothing (preview mode, logged-out) */
.dynamicContent[class*="dynamic-kneller_feeder"] {
  position: relative;
  padding-top: var(--kn-space-top, 16px);
  padding-bottom: var(--kn-space-bottom, 16px);
  margin-top: var(--kn-offset-top, 0);
}
.dynamicContent[class*="dynamic-kneller_feeder"]:not(:has(.kn-feeder)) { display: none; }

/* visually hidden helper */
.kn-feeder .kn-sr {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Card + layout ---- */
.kn-feeder .kn-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.kn-feeder .kn-shell {
  display: grid;
  overflow: clip;
  background: var(--kn-surface, #fff);
  border: var(--kn-border, 1px solid var(--kn-line));
  border-radius: var(--kn-radius, 0);
  box-shadow: var(--kn-shadow, none);
}

/* ---- Media / slider (curved bottom edge when stacked, curved right edge side by side) ---- */
.kn-feeder .kn-media {
  position: relative;
  z-index: 1;
  aspect-ratio: 16 / 9;
  min-height: 10rem;
  background: var(--kn-primary);
  overflow: hidden;
  clip-path: var(--kn-clip-m);
}
.kn-feeder .kn-viewport {
  position: absolute;
  inset: 0;
  overflow: hidden;
  touch-action: pan-y;
  cursor: grab;
  outline: none;
}
.kn-feeder .kn-viewport.is-dragging { cursor: grabbing; }
.kn-feeder .kn-viewport:focus-visible {
  outline: 3px solid #fff;
  outline-offset: -6px;
  box-shadow: inset 0 0 0 6px color-mix(in srgb, var(--kn-primary) 70%, #000);
}
/* faint neutral shade top and bottom so the logo and controls always have a backdrop */
.kn-feeder .kn-viewport::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(0,0,0,.28) 0%, rgba(0,0,0,0) 38%, rgba(0,0,0,0) 62%, rgba(0,0,0,.32) 100%);
}
.kn-feeder .kn-track {
  display: flex;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.25, 0.8, 0.3, 1);
}
.kn-feeder .kn-slide {
  flex: 0 0 100%;
  min-width: 0;
  margin: 0;
  height: 100%;
}
.kn-feeder .kn-slide img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}
.kn-feeder .kn-logo {
  position: absolute;
  z-index: 3;
  top: 0.7rem;
  left: 0.7rem;
  width: clamp(3.4rem, 28%, 5.25rem);
  height: auto;
  max-height: 4.5rem;
  margin: 0;
  object-fit: contain;
  object-position: left top;
  pointer-events: none;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}

.kn-feeder .kn-controls {
  position: absolute;
  z-index: 10;
  left: 50%;                    /* stacked layout: centred, where the curved bottom edge is lowest */
  transform: translateX(-50%);
  bottom: 1.25rem;              /* lifted so the curved bottom edge never clips it */
  display: flex;
  align-items: center;
  gap: 0.15rem;
}
.kn-feeder .kn-arrow {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.875rem;
  height: 1.875rem;
  min-width: 0;                 /* beat theme button min-width */
  padding: 0;                   /* theme buttons add padding that collapses the arrow */
  margin: 0;
  line-height: 1;
  -webkit-appearance: none;
  appearance: none;
  border: none;
  border-radius: var(--kn-ctrl-radius, 50%);
  background: var(--kn-secondary);
  color: var(--kn-on-secondary);
  cursor: pointer;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}
.kn-feeder .kn-arrow svg { width: 1rem; height: 1rem; flex: 0 0 auto; }
/* Some themes set a global svg { fill } that fills the arrow head; the icon is outline-only */
.kn-feeder .kn-arrow svg,
.kn-feeder .kn-arrow svg * { fill: none !important; }
.kn-feeder .kn-arrow:hover:not(:disabled) { background: color-mix(in srgb, var(--kn-secondary) 85%, #000); }
.kn-feeder .kn-arrow:disabled { opacity: 0.4; cursor: default; }

.kn-feeder .kn-dots { display: flex; align-items: center; }
/* 24px hit area around a small visible dot (WCAG 2.2 target size) */
.kn-feeder .kn-dot {
  position: relative;
  width: 1.5rem;
  height: 1.5rem;
  min-width: 0;
  padding: 0;
  margin: 0;
  border: 0;
  background: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.kn-feeder .kn-dot::before {
  content: "";
  position: absolute;
  inset: 0.55rem;
  border-radius: var(--kn-ctrl-radius, 50%);
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
  transition: background-color 0.2s ease;
}
.kn-feeder .kn-dot[aria-current="true"]::before {
  background: var(--kn-secondary);
  box-shadow: 0 0 0 1.5px #fff;   /* ring keeps the active dot visible on any photo */
}

.kn-feeder .kn-arrow:focus-visible,
.kn-feeder .kn-dot:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 1px;
  box-shadow: 0 0 0 5px rgba(0, 0, 0, 0.55);
}

/* ---- Body ---- */
.kn-feeder .kn-body {
  display: grid;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem 1.25rem;
  align-content: center;
}
.kn-feeder .kn-title {
  margin: 0;
  padding: 0;
  font-size: clamp(1.45rem, 5vw, 1.9rem);
  line-height: 1.15;
  letter-spacing: var(--kn-ls, normal);   /* matches the link text (set by kneller-feeder.js) */
  color: var(--kn-text-accent);
}
.kn-feeder .kn-school { display: inline-block; max-width: 100%; }   /* school name never splits across lines */
.kn-feeder .kn-pathway {
  margin: 0;
  font-family: var(--kn-heading-font, inherit);
  font-size: 1.4rem;
  font-style: normal;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: var(--kn-ls, normal);
  color: var(--kn-secondary-text);
}
.kn-feeder .kn-lede {
  margin: 0;
  max-width: 44rem;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--kn-muted);
}
.kn-feeder .kn-actions { display: flex; flex-wrap: wrap; gap: 0.25rem 2rem; margin-top: 0.25rem; }

/* CTAs are text links with a circled arrow, to match the links elsewhere on the site */
.kn-feeder .kn-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 2.75rem;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.3;
  color: var(--kn-ink, #1a1a1a);
  text-decoration: none;
  cursor: pointer;
}
.kn-feeder .kn-link-text { padding-top: 0.15rem; }
.kn-feeder .kn-link-icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.875rem;
  height: 1.875rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--kn-secondary-text);
  transition: background-color 0.1s ease, color 0.1s ease;
}
.kn-feeder .kn-link-icon svg { display: block; width: 1rem; height: 1rem; }
.kn-feeder .kn-link-icon svg,
.kn-feeder .kn-link-icon svg * { fill: none !important; } /* some themes set a global svg fill */
.kn-feeder .kn-link:hover,
.kn-feeder .kn-link:focus { color: var(--kn-ink, #1a1a1a); text-decoration: none; }
.kn-feeder .kn-link:hover .kn-link-icon {
  background: var(--kn-secondary);
  border-color: var(--kn-secondary);
  color: var(--kn-on-secondary);
}
.kn-feeder .kn-link:focus-visible {
  outline: 3px solid var(--kn-text-accent);
  outline-offset: 3px;
}

/* ---- Wide enough column: image left, content right (container queries) ---- */
@container (min-width: 720px) {
  .kn-feeder .kn-shell { grid-template-columns: minmax(13rem, 320px) minmax(0, 1fr); min-height: 21rem; }
  .kn-feeder .kn-media { aspect-ratio: auto; min-height: 100%; clip-path: var(--kn-clip-d); }
  .kn-feeder .kn-controls { left: 0.75rem; transform: none; bottom: 0.85rem; }   /* side by side: bottom-left of the image */
  .kn-feeder .kn-body { padding: 1.5rem 2rem 1.5rem 1rem; gap: 0.6rem; }
}
@container (min-width: 960px) {
  .kn-feeder .kn-body { padding-left: 0.35rem; }
}
/* Narrow column */
@container (max-width: 420px) {
  .kn-feeder .kn-title { font-size: clamp(1.3rem, 6vw, 1.55rem); }
  .kn-feeder .kn-actions { flex-direction: column; gap: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .kn-feeder .kn-track,
  .kn-feeder .kn-link-icon,
  .kn-feeder .kn-dot::before,
  .kn-feeder .kn-arrow { transition: none !important; }
}