/* ============================================================
   ASPF Mega Menu – aspf-megamenu.css
   Requires CSS variables from base.css
   ============================================================ */

/* ---- wrapper ---- */
.mega-nav {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-body);
}

/* ---- top-level item ---- */
.mega-nav__item {
  position: relative; /* anchor for panel */
}

/* ---- trigger (category link + chevron) ---- */
.mega-nav__trigger {
  display: flex;
  align-items: center;
  gap: 0.3em;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius);
  transition: color var(--duration-fast) var(--ease),
              background var(--duration-fast) var(--ease);
  white-space: nowrap;
  line-height: 1.4;
}

.mega-nav__trigger:hover,
.mega-nav__trigger:focus-visible {
  color: var(--color-primary);
  background: var(--color-support-light);
}

/* chevron icon */
.mega-nav__chevron {
  display: inline-flex;
  width: 1em;
  height: 1em;
  transition: transform var(--duration-fast) var(--ease);
  flex-shrink: 0;
}

.mega-nav__chevron svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* chevron rotates when panel is open */
.mega-nav__item.is-open .mega-nav__chevron {
  transform: rotate(180deg);
}

/* ---- dropdown panel (desktop) ---- */
.mega-nav__panel {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 320px;
  max-width: 540px;
  background: var(--color-white);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5) var(--space-5) var(--space-4);
  z-index: 1000;

  /* animation */
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-fast) var(--ease),
              transform var(--duration-fast) var(--ease),
              visibility 0s linear var(--duration-fast);
}

.mega-nav__item.is-open > .mega-nav__panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition: opacity var(--duration-fast) var(--ease),
              transform var(--duration-fast) var(--ease),
              visibility 0s linear 0s;
}

/* keep panel open while mouse travels from trigger to panel */
.mega-nav__panel::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

/* ---- sub-topic grid ---- */
.mega-nav__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-1) var(--space-4);
}

/* ---- individual sub-topic link ---- */
.mega-nav__subtopic {
  display: block;
  padding: var(--space-2) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  text-decoration: none;
  border-radius: var(--radius);
  transition: color var(--duration-fast) var(--ease),
              background var(--duration-fast) var(--ease);
  line-height: 1.4;
}

.mega-nav__subtopic:hover,
.mega-nav__subtopic:focus-visible {
  color: var(--color-primary);
  background: var(--color-support-light);
}

/* ---- "View all in Category" link ---- */
.mega-nav__viewall {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-rule);
  width: 100%;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease);
}

.mega-nav__viewall:hover,
.mega-nav__viewall:focus-visible {
  color: var(--color-accent);
}

.mega-nav__viewall-arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease);
}

.mega-nav__viewall:hover .mega-nav__viewall-arrow {
  transform: translateX(3px);
}

/* ---- "Get help now" button – leave alone, just ensure no dropdown ---- */
.mega-nav__help-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease);
  white-space: nowrap;
}

.mega-nav__help-btn:hover,
.mega-nav__help-btn:focus-visible {
  background: #c8520e; /* slightly darker amber */
}

/* ---- hamburger toggle (mobile) ---- */
.mega-nav__hamburger {
  display: none; /* hidden on desktop */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1100;
}

.mega-nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease),
              opacity var(--duration-fast) var(--ease);
}

/* hamburger -> X transform */
.mega-nav__hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mega-nav__hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.mega-nav__hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- overlay backdrop (mobile) ---- */
.mega-nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1050;
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}

.mega-nav__overlay.is-visible {
  display: block;
  opacity: 1;
}

/* =============================================================
   MOBILE  (860px and below)
   ============================================================= */
@media (max-width: 860px) {
  .mega-nav__hamburger {
    display: flex;
  }

  /* side panel container */
  .mega-nav__list {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    background: var(--color-white);
    z-index: 1100;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: var(--space-8) var(--space-4) var(--space-6);
    transform: translateX(100%);
    transition: transform var(--duration) var(--ease);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .mega-nav__list.is-open {
    transform: translateX(0);
  }

  /* top-level items stack vertically */
  .mega-nav__item {
    border-bottom: 1px solid var(--color-rule);
  }

  /* trigger row: link + separate chevron button */
  .mega-nav__trigger {
    width: 100%;
    justify-content: space-between;
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-base);
  }

  /* separate tap target for the chevron on mobile */
  .mega-nav__expand-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: none;
    border-left: 1px solid var(--color-rule);
    cursor: pointer;
    color: var(--color-ink-muted);
    flex-shrink: 0;
    transition: color var(--duration-fast) var(--ease);
  }

  .mega-nav__expand-btn:hover {
    color: var(--color-primary);
  }

  .mega-nav__expand-btn .mega-nav__chevron {
    width: 1.1em;
    height: 1.1em;
  }

  .mega-nav__item.is-open .mega-nav__expand-btn .mega-nav__chevron {
    transform: rotate(180deg);
  }

  /* mobile trigger row layout */
  .mega-nav__trigger-row {
    display: flex;
    align-items: center;
  }

  .mega-nav__trigger-row .mega-nav__trigger {
    flex: 1;
  }

  /* dropdown panel becomes accordion */
  .mega-nav__panel {
    position: static;
    transform: none;
    min-width: 0;
    max-width: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0 var(--space-2) 0 var(--space-4);
    background: var(--color-cream);

    /* accordion animation */
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transition: max-height var(--duration) var(--ease),
                padding var(--duration) var(--ease);
  }

  .mega-nav__panel::before {
    display: none;
  }

  .mega-nav__item.is-open > .mega-nav__panel {
    max-height: 600px; /* large enough for content */
    padding: var(--space-2) var(--space-2) var(--space-3) var(--space-4);
    transform: none;
  }

  /* grid becomes single column */
  .mega-nav__grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .mega-nav__subtopic {
    padding: var(--space-2) var(--space-2);
  }

  .mega-nav__viewall {
    margin-top: var(--space-2);
    padding-top: var(--space-2);
  }

  /* help button full width */
  .mega-nav__help-btn {
    margin-top: var(--space-3);
    justify-content: center;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
  }
}

/* =============================================================
   DESKTOP  (above 860px)
   ============================================================= */
@media (min-width: 861px) {
  .mega-nav__list {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  /* hide the separate mobile expand button on desktop */
  .mega-nav__expand-btn {
    display: none;
  }

  /* trigger row wrapper not needed on desktop */
  .mega-nav__trigger-row {
    display: contents;
  }
}

/* =============================================================
   A11y & Focus
   ============================================================= */
.mega-nav__trigger:focus-visible,
.mega-nav__subtopic:focus-visible,
.mega-nav__viewall:focus-visible,
.mega-nav__expand-btn:focus-visible,
.mega-nav__help-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
  .mega-nav__panel,
  .mega-nav__chevron,
  .mega-nav__trigger,
  .mega-nav__subtopic,
  .mega-nav__viewall-arrow,
  .mega-nav__hamburger span,
  .mega-nav__overlay {
    transition-duration: 0.01ms !important;
  }
}