/* Mega navigation (enterprise header) */

/* Full-page scrim (injected by /assets/js/nav.js). */
.mega-scrim {
  position: fixed;
  inset: 0;
  /* Keep underlying page text from competing with the panel. */
  background:
    radial-gradient(
      1100px 720px at 12% 0%,
      color-mix(in srgb, var(--accent) 10%, transparent),
      transparent 62%
    ),
    radial-gradient(
      1100px 720px at 92% 10%,
      color-mix(in srgb, var(--accent-3) 8%, transparent),
      transparent 64%
    ),
    /* Transparent base so the page stays legible behind the panel. */
    color-mix(in srgb, var(--bg) 88%, transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
  /* Keep header clickable (header is z-index: 10). */
  z-index: 9;
}

:root.mega-open .mega-scrim {
  /* Dim, don't blackout: keep the page legible behind the panel. */
  opacity: 0.35;
  pointer-events: auto;
  /* Blur the page behind the panel without making the panel itself glassy. */
  backdrop-filter: blur(4px) saturate(1.02);
}

@supports not (backdrop-filter: blur(2px)) {
  :root.mega-open .mega-scrim {
    backdrop-filter: none;
  }
}

:root.mega-open body {
  /* Prevent scroll / accidental interaction behind mega panels. */
  overflow: hidden;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.mega {
  /* Panels are positioned relative to the header container (layout.css). */
  position: static;
}

.mega-summary {
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.mega-summary::-webkit-details-marker {
  display: none;
}

.mega[open] .mega-summary {
  opacity: 1;
  border-color: color-mix(in srgb, var(--border) 70%, var(--accent));
  background: var(--panel-2);
}

.mega-panel {
  position: absolute;
  top: calc(100% + 0.8rem);
  left: 0;
  right: 0;
  width: auto;
  padding: var(--space-7);
  border-radius: var(--radius-lg);
  border: 1px solid var(--panel-border);
  /* Opaque base so underlying page content never shows through. */
  background-color: var(--panel-3);
  background-image:
    radial-gradient(1100px 680px at 10% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%),
    radial-gradient(1100px 680px at 92% 10%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 62%),
    linear-gradient(
      180deg,
      var(--panel-2),
      var(--panel-1)
    );
  box-shadow: var(--shadow-lg);
  z-index: 30;
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px);
  transform-origin: top center;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.mega[open] .mega-panel {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.mega-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0.9rem;
}

.mega-col {
  grid-column: span 4;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  background-color: var(--panel-2);
  background-image:
    radial-gradient(900px 520px at 12% 0%, color-mix(in srgb, var(--accent-3) 8%, transparent), transparent 62%);
  padding: 1rem 1rem 0.95rem;
}

.mega-col-accent {
  background-color: var(--panel-2);
  background-image:
    radial-gradient(900px 520px at 15% 0%, color-mix(in srgb, var(--accent-3) 14%, transparent), transparent 62%),
    radial-gradient(900px 520px at 92% 12%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 62%);
  border-color: var(--panel-border);
}

.mega-title {
  font-family: var(--font-serif);
  font-weight: 780;
  letter-spacing: -0.02em;
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
}

.mega-text {
  margin: 0 0 0.8rem;
  color: color-mix(in srgb, var(--text) 82%, var(--muted));
  max-width: var(--line);
  font-size: var(--text-sm);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.mega-links {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.mega-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.5rem 0.6rem;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  color: color-mix(in srgb, var(--text) 86%, var(--muted));
  background-color: var(--panel-1);
  /* Prevent long labels from wrecking layout. */
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mega-link:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--border) 70%, var(--accent));
  background: var(--panel-2);
}

.mega-link::after {
  content: "→";
  opacity: 0.85;
  color: color-mix(in srgb, var(--accent) 70%, var(--text));
}

.mega-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.2rem;
}

.mega-search {
  margin-top: 0.35rem;
}

.mega-search-input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background-color: var(--panel-2);
  color: var(--text);
  outline: none;
  box-shadow: var(--shadow-sm);
}

.mega-search-input:focus {
  border-color: color-mix(in srgb, var(--border) 70%, var(--accent));
}

.mega-results {
  margin-top: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mega-hint {
  font-size: var(--text-xs);
  padding: 0.55rem 0.7rem;
  border-radius: 14px;
  border: 1px dashed var(--panel-border);
  background-color: var(--panel-2);
}

.mega-result {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.6rem 0.7rem;
  border-radius: 14px;
  border: 1px solid transparent;
  text-decoration: none;
  background-color: var(--panel-1);
  color: color-mix(in srgb, var(--text) 86%, var(--muted));
  max-height: 92px;
  overflow: hidden;
}

.mega-result:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--border) 70%, var(--accent));
  background: var(--panel-2);
}

.mega-result-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.mega-result-meta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  font-size: var(--text-xs);
}

.mega-result-kind {
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text) 70%, var(--muted));
}

.mega-result-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: var(--panel-2);
}

.mega-summary::after {
  content: "v";
  margin-left: 0.35rem;
  opacity: 0.7;
  font-size: 0.9em;
  display: inline-block;
  transition: transform 160ms ease;
}

.mega[open] .mega-summary::after {
  transform: rotate(180deg);
}

/* Mobile: panels become inline sections (no absolute). */
@media (max-width: 820px) {
  .mega-scrim {
    opacity: 0 !important;
    pointer-events: none !important;
  }
  .mega-panel {
    position: static;
    width: 100%;
    margin-top: 0.75rem;
    padding: var(--space-6);
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
  .mega-col {
    grid-column: span 12;
  }
}