/* ==========================================================================
   COMPONENT: Mega navigation (desktop ≥1180px)
   Eight categories, staggered column reveal, morphing underline indicator.
   No-JS: panels open on :focus-within and :hover, so the whole IA stays
   reachable without JavaScript.
   ========================================================================== */

.c-nav {
  display: none;
  flex: 1 1 auto;
  justify-content: center;
}

@media (min-width: 1180px) {
  .c-nav { display: block; }
}

.c-nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  position: relative;
}

.c-nav__item { position: relative; }

.c-nav__link {
  position: relative;
  isolation: isolate;          /* keeps the hover pill behind the label */
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-3) var(--sp-4);
  font-family: var(--ff-utility);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
  background: none;
  border-radius: var(--r-full);
  transition:
    color var(--d-fast) var(--e-out),
    background-color var(--d-fast) var(--e-out);
}

/* A pill fades in under the pointer. It is drawn from currentColor so the same
   rule works on the plaster bar and over the hero, where the text is white. */
.c-nav__link::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-color: currentColor;
  z-index: -1;
  opacity: 0;
  transform: scale(0.94);
  transition:
    opacity var(--d-fast) var(--e-out),
    transform var(--d-base) var(--e-spring);
  pointer-events: none;
}

.c-nav__item:hover > .c-nav__link::before,
.c-nav__link:focus-visible::before,
.c-nav__link[aria-expanded="true"]::before {
  opacity: 0.07;
  transform: scale(1);
}

.c-nav__chev {
  width: 12px;
  height: 12px;
  transition: transform var(--d-fast) var(--e-out);
}

.c-nav__item:hover .c-nav__chev,
.c-nav__item:focus-within .c-nav__chev,
.c-nav__link[aria-expanded="true"] .c-nav__chev { transform: rotate(180deg); }

/* --------------------------------------------------------------------------
   MORPHING UNDERLINE — one element, measured and transformed between items
   by navigation.js. Not per-item borders, so it can travel.
   -------------------------------------------------------------------------- */

.c-nav__indicator {
  position: absolute;
  inset-block-end: 2px;
  inset-inline-start: 0;
  height: 2px;
  width: 1px;
  border-radius: var(--r-full);
  background-color: var(--c-verdigris);
  transform: translateX(var(--ind-x, 0)) scaleX(var(--ind-w, 0));
  transform-origin: left center;
  opacity: var(--ind-o, 0);
  /* The travel is slower than the fade, so the bar reads as ONE object moving
     between items rather than two bars swapping places. */
  transition:
    transform var(--d-base) var(--e-spring),
    opacity var(--d-fast) var(--e-out);
  pointer-events: none;
}

.c-header--over-hero:not(.is-stuck) .c-nav__indicator {
  background-color: var(--c-verdigris-lt);
}

/* Current page marker is a real, always-visible rule — independent of hover. */
.c-nav__link[aria-current="page"] {
  box-shadow: inset 0 -2px 0 0 var(--c-verdigris);
}

.c-header--over-hero:not(.is-stuck) .c-nav__link[aria-current="page"] {
  box-shadow: inset 0 -2px 0 0 var(--c-verdigris-lt);
}

/* --------------------------------------------------------------------------
   PANEL
   -------------------------------------------------------------------------- */

.c-nav__panel {
  position: absolute;
  inset-block-start: calc(100% + var(--sp-2));
  inset-inline-start: 50%;
  z-index: var(--z-megamenu);
  width: min(64rem, calc(100vw - var(--gutter) * 2));
  padding: var(--sp-6);
  background-color: var(--c-paper);
  color: var(--c-ink);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-3);

  /* Closed state. visibility keeps it out of the tab order without display:none,
     which would kill the transition. */
  visibility: hidden;
  opacity: 0;
  /* Drops in from slightly above AND slightly small, with the origin at the top
     edge — so it reads as unfolding from the nav item rather than sliding in
     from nowhere. transform-origin is what sells it. */
  transform: translateX(-50%) translateY(-10px) scale(0.985);
  transform-origin: top center;
  transition:
    opacity var(--d-fast) var(--e-out),
    transform var(--d-base) var(--e-out),
    visibility 0s linear var(--d-base);
}

.c-nav__panel--narrow { width: min(34rem, calc(100vw - var(--gutter) * 2)); }

/* Open — driven by hover, focus-within (no-JS), or JS-set aria-expanded. */
.c-nav__item:hover > .c-nav__panel,
.c-nav__item:focus-within > .c-nav__panel,
.c-nav__link[aria-expanded="true"] + .c-nav__panel {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
  transition-delay: 0s;
}

/* Panels near the viewport edge are re-anchored by navigation.js. */
.c-nav__panel[data-align="end"] {
  inset-inline-start: auto;
  inset-inline-end: 0;
  transform: translateY(-10px) scale(0.985);
  transform-origin: top right;
}

.c-nav__panel[data-align="start"] {
  inset-inline-start: 0;
  inset-inline-end: auto;
  transform: translateY(-10px) scale(0.985);
  transform-origin: top left;
}

.c-nav__item:hover > .c-nav__panel[data-align="end"],
.c-nav__item:focus-within > .c-nav__panel[data-align="end"],
.c-nav__link[aria-expanded="true"] + .c-nav__panel[data-align="end"],
.c-nav__item:hover > .c-nav__panel[data-align="start"],
.c-nav__item:focus-within > .c-nav__panel[data-align="start"],
.c-nav__link[aria-expanded="true"] + .c-nav__panel[data-align="start"] {
  transform: translateY(0) scale(1);
}

/* --------------------------------------------------------------------------
   PANEL LAYOUT
   -------------------------------------------------------------------------- */

.c-nav__panel-grid {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1fr;
}

.c-nav__panel--wide .c-nav__panel-grid {
  grid-template-columns: 1fr 1fr 20rem;
}

.c-nav__col { min-width: 0; }

/* Staggered column reveal — motion.js sets --i; CSS provides the delay so the
   effect survives without GSAP. */
.c-nav__col,
.c-nav__feature {
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity var(--d-fast) var(--e-out),
    transform var(--d-base) var(--e-out);
  transition-delay: calc(var(--i, 0) * var(--stagger));
}

.c-nav__item:hover .c-nav__col,
.c-nav__item:focus-within .c-nav__col,
.c-nav__item:hover .c-nav__feature,
.c-nav__item:focus-within .c-nav__feature {
  opacity: 1;
  transform: translateY(0);
}

.c-nav__col-title {
  font-family: var(--ff-utility);
  font-size: var(--fs-3xs);
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-block-end: var(--sp-3);
}

.c-nav__sublist {
  display: grid;
  gap: var(--sp-1);
}

/* --------------------------------------------------------------------------
   SUB-LINK — thumbnail + title + one-line description
   -------------------------------------------------------------------------- */

.c-nav__sublink {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2);
  border-radius: var(--r-md);
  text-decoration: none;
  color: inherit;
  transition: background-color var(--d-fast) var(--e-out);
}

.c-nav__sublink:hover { background-color: var(--c-verdigris-05); }

.c-nav__thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  object-fit: cover;
  background-color: var(--surface-sunken);
  flex: none;
}

.c-nav__sublink-title {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  line-height: 1.3;
}

.c-nav__sublink-desc {
  display: block;
  font-size: var(--fs-2xs);
  line-height: 1.4;
  color: var(--c-text-muted);
}

/* Compact variant for text-only panels (Zakat, About, Fundraise). */
.c-nav__sublink--plain { grid-template-columns: 1fr; }

/* --------------------------------------------------------------------------
   FEATURED URGENT-APPEAL PANEL
   -------------------------------------------------------------------------- */

.c-nav__feature {
  padding: var(--sp-4);
  background-color: var(--c-ink);
  color: var(--c-text-inv);
  border-radius: var(--r-md);
  display: grid;
  gap: var(--sp-3);
  align-content: start;
}

.c-nav__feature .l-frame { border-radius: var(--r-sm); }

.c-nav__feature-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  align-self: start;
  font-family: var(--ff-utility);
  font-size: var(--fs-3xs);
  letter-spacing: var(--tr-wide);
  text-transform: uppercase;
  color: var(--c-ink);
  background-color: var(--c-marigold);
  padding: 0.2rem var(--sp-2);
  border-radius: var(--r-sm);
}

.c-nav__feature-title {
  font-family: var(--ff-body);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  line-height: 1.25;
  color: var(--c-text-inv);
}

.c-nav__feature-desc {
  font-size: var(--fs-2xs);
  color: var(--c-text-muted-inv);
}

/* Panel footer — "view all" */
.c-nav__panel-foot {
  margin-block-start: var(--sp-5);
  padding-block-start: var(--sp-4);
  border-block-start: 1px solid var(--c-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
}