/* navigation_menu_html - the navigation rail's own rules, kept here because
 * the Anvil server strips a template's <style> block. Rules in the
 * order the template declared them, declarations byte for byte; only the
 * selector preludes changed.
 *
 * ONE MECHANICAL SCOPING RULE. A selector that already names
 * the root class or an id is left alone: .nav-container, .nav-container *,
 * [data-theme="dark"] .nav-container, the .nav-container.nav-landing /
 * .nav-landing-empty / .nav-loading families, #nav-menu and its .nav-landing
 * descendants, and .nav-fade-in, whose subject IS the root (the root carries
 * `nav-container nav-fade-in px-anvil-reset`, so :where(.nav-container)
 * .nav-fade-in would never match anything). Every other .nav-* selector gains
 * `:where(.nav-container) `, which adds zero specificity and so cannot change
 * which rule wins. The two [data-theme="dark"] .nav-reset-db-btn rules take
 * the scope AFTER the theme attribute, because data-theme sits on <html>,
 * above this root.
 *
 * :root KEEPS ITS :root PRELUDE. applyAccentColors() overrides the four
 * --nav-accent* properties through document.documentElement.style, and
 * .root-burger:hover reads --nav-accent from outside this rail.
 *
 * THE .anvil-m3-navigation-drawer RULES STAY BARE, as they were: that element
 * is Anvil's own drawer, outside this form's root. Their overflow-x: hidden
 * !important ties with theme.css's overflow: hidden !important at the
 * same specificity, and both resolve overflow-x to hidden, so document order
 * cannot change the computed result.
 *
 * NO DESIGNER GATE, and that is a decision rather than an omission. Nothing
 * here is hidden until JavaScript runs: the two clipped-tab wrappers and
 * .nav-menu-empty are default states a class turns on, already hidden on the
 * designer
 * canvas, and #nav-menu renders empty on the canvas because the module
 * fills it - that is the prescribed skeleton.
 *
 * The six keyframes keep their names: all are nav-prefixed and unique in the
 * app. This file declares no .themed-scrollbar rule (the dependency owns that
 * class) and no .root-* or .px-menu-landing rule (the shell owns those six
 * names, theme/assets/main/main.css).
 */

/* ========================================
   NAVIGATION MENU - Premium Control Panel
   ======================================== */

/* Accent vars on :root so applyAccentColors() can override them
   dynamically via document.documentElement.style.setProperty() */
:root {
  --nav-accent: #64748b;
  --nav-accent-light: #94a3b8;
  --nav-accent-glow: rgba(100, 116, 139, 0.12);
  --nav-accent-subtle: rgba(100, 116, 139, 0.06);
}

.nav-container {
  --nav-bg-hover: #e2e8f0;
  --nav-danger: #ef4444;
  --nav-danger-glow: rgba(239, 68, 68, 0.12);
  --nav-success: #22c55e;
  --nav-warning: #f59e0b;
  --nav-card-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --nav-btn-shadow: 0 1px 2px rgba(0,0,0,0.05);
  --nav-scrollbar-track: #f1f5f9;
  --nav-scrollbar-thumb: #cbd5e1;
  font-family: var(--px-font);
  background: var(--px-bg-deep);
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
  color: var(--px-text-primary);
  box-sizing: border-box;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

[data-theme="dark"] .nav-container {
  --nav-bg-hover: #475569;
  --nav-danger: #f87171;
  --nav-danger-glow: rgba(248, 113, 113, 0.2);
  --nav-card-shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.2);
  --nav-btn-shadow: 0 1px 2px rgba(0,0,0,0.2);
  --nav-scrollbar-track: #1e293b;
  --nav-scrollbar-thumb: #475569;
}

/* Style Anvil's navigation drawer background + scrollbar */
[data-theme="dark"] .anvil-m3-navigation-drawer {
  background: #0f172a !important;
}

.anvil-m3-navigation-drawer {
  overflow-x: hidden !important; /* No horizontal scroll */
  scrollbar-width: thin;
  scrollbar-color: var(--nav-accent) var(--px-bg-elevated);
}

.anvil-m3-navigation-drawer::-webkit-scrollbar {
  width: 8px;
}

.anvil-m3-navigation-drawer::-webkit-scrollbar-track {
  background: var(--px-bg-elevated);
  border-radius: 4px;
}

.anvil-m3-navigation-drawer::-webkit-scrollbar-thumb {
  background: var(--nav-accent);
  border-radius: 4px;
}

.anvil-m3-navigation-drawer::-webkit-scrollbar-thumb:hover {
  background: var(--nav-accent-light);
}

.nav-container * {
  box-sizing: border-box;
}

/* ========================================
   HEADER / USER SECTION
   ======================================== */
:where(.nav-container) .nav-header {
  padding: 8px 16px 12px;
  flex-shrink: 0;
}

:where(.nav-container) .nav-user-section {
  position: relative;
}

:where(.nav-container) .nav-user-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--px-bg-card);
  border: 1px solid var(--px-border);
  border-radius: 12px;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  box-shadow: var(--nav-btn-shadow);
}

:where(.nav-container) .nav-user-trigger:hover {
  background: var(--px-bg-elevated);
  border-color: var(--nav-accent);
}

:where(.nav-container) .nav-user-trigger.expanded {
  border-color: var(--nav-accent);
  box-shadow: 0 0 0 3px var(--nav-accent-glow);
}

:where(.nav-container) .nav-user-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--nav-accent) 0%, var(--nav-accent-light) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  box-shadow: 0 2px 8px var(--nav-accent-glow);
  transition: box-shadow 0.3s ease;
}

:where(.nav-container) .nav-user-info {
  flex: 1;
  min-width: 0;
  text-align: left;
}

:where(.nav-container) .nav-user-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--px-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

:where(.nav-container) .nav-user-email {
  font-family: var(--px-mono);
  font-size: 0.7rem;
  color: var(--px-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

:where(.nav-container) .nav-user-chevron {
  color: var(--px-text-muted);
  font-size: 0.75rem;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

:where(.nav-container) .nav-user-trigger.expanded .nav-user-chevron {
  transform: rotate(180deg);
}

/* Permissions Dropdown */
:where(.nav-container) .nav-permissions-dropdown {
  display: none;
  margin-top: 8px;
  background: var(--px-bg-card);
  border: 1px solid var(--px-border);
  border-radius: 10px;
  padding: 12px;
  max-height: 200px;
  overflow-y: auto;
  box-shadow: var(--nav-card-shadow);
  animation: navSlideDown 0.2s ease;
}

:where(.nav-container) .nav-permissions-dropdown.visible {
  display: block;
}

@keyframes navSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

:where(.nav-container) .nav-permissions-section {
  margin-bottom: 10px;
}

:where(.nav-container) .nav-permissions-section:last-child {
  margin-bottom: 0;
}

:where(.nav-container) .nav-permissions-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

:where(.nav-container) .nav-permissions-label.granted {
  color: var(--nav-success);
}

:where(.nav-container) .nav-permissions-label.denied {
  color: var(--nav-danger);
}

:where(.nav-container) .nav-permissions-list {
  font-size: 0.75rem;
  color: var(--px-text-secondary);
  line-height: 1.6;
  padding-left: 16px;
}

:where(.nav-container) .nav-permissions-list span {
  display: block;
}

/* ========================================
   MK TEST BUTTON - Top right clipped tab
   ======================================== */
:where(.nav-container) .nav-test-btn-wrapper {
  display: none;
  flex-shrink: 0;
  position: relative;
  height: 32px;
  margin-bottom: 4px;
}

:where(.nav-container) .nav-test-btn-wrapper.visible {
  display: block;
}

:where(.nav-container) .nav-test-btn {
  position: absolute;
  left: -8px;
  top: 0;
  padding: 6px 12px 6px 16px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border: none;
  border-radius: 0 8px 8px 0;
  color: white;
  font-family: var(--px-font);
  font-weight: 700;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 2px 2px 8px rgba(245, 158, 11, 0.4);
  animation: navTestPulse 2s ease-in-out infinite;
}

@keyframes navTestPulse {
  0%, 100% { box-shadow: 2px 2px 8px rgba(245, 158, 11, 0.4); }
  50% { box-shadow: 2px 2px 16px rgba(245, 158, 11, 0.6); }
}

:where(.nav-container) .nav-test-btn:hover {
  left: 0;
  padding-left: 24px;
  box-shadow: 2px 2px 16px rgba(245, 158, 11, 0.6);
}

:where(.nav-container) .nav-test-btn:active {
  transform: scale(0.98);
}

:where(.nav-container) .nav-test-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  animation: none;
}

/* ========================================
   RESET DB BUTTON - Top clipped tab (Training env only)
   ======================================== */
:where(.nav-container) .nav-reset-db-btn-wrapper {
  display: none;
  flex-shrink: 0;
  position: relative;
  height: 32px;
  margin-bottom: 4px;
}

:where(.nav-container) .nav-reset-db-btn-wrapper.visible {
  display: block;
}

:where(.nav-container) .nav-reset-db-btn {
  position: absolute;
  left: -8px;
  top: 0;
  padding: 6px 12px 6px 16px;
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  border: none;
  border-radius: 0 8px 8px 0;
  color: white;
  font-family: var(--px-font);
  font-weight: 700;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 2px 2px 8px rgba(245, 158, 11, 0.5);
  animation: navResetDbPulse 2s ease-in-out infinite;
}

@keyframes navResetDbPulse {
  0%, 100% { box-shadow: 2px 2px 8px rgba(245, 158, 11, 0.5); }
  50% { box-shadow: 2px 2px 18px rgba(251, 191, 36, 0.75); }
}

:where(.nav-container) .nav-reset-db-btn:hover {
  left: 0;
  padding-left: 24px;
  box-shadow: 2px 2px 18px rgba(251, 191, 36, 0.8);
}

:where(.nav-container) .nav-reset-db-btn:active {
  transform: scale(0.98);
}

:where(.nav-container) .nav-reset-db-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  animation: none;
}

[data-theme="dark"] :where(.nav-container) .nav-reset-db-btn {
  box-shadow: 2px 2px 10px rgba(251, 191, 36, 0.55);
}

[data-theme="dark"] :where(.nav-container) .nav-reset-db-btn:hover {
  box-shadow: 2px 2px 20px rgba(251, 191, 36, 0.9);
}

/* ========================================
   THEME TOGGLE - Top section
   ======================================== */
:where(.nav-container) .nav-theme-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 8px 16px;
  flex-shrink: 0;
}

/* ========================================
   SESSION TIMER - Below user section
   ======================================== */
:where(.nav-container) .nav-timer-section {
  padding: 8px 16px 12px;
  border-bottom: 1px solid var(--px-border);
  flex-shrink: 0;
}

:where(.nav-container) .nav-timer-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--px-bg-card);
  border: 1px solid var(--px-border);
  border-radius: 8px;
}

/* ========================================
   MENU SECTION
   ======================================== */
:where(.nav-container) .nav-menu-wrapper {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--nav-accent) var(--px-bg-elevated);
}

:where(.nav-container) .nav-menu-wrapper::-webkit-scrollbar {
  width: 6px;
}

:where(.nav-container) .nav-menu-wrapper::-webkit-scrollbar-track {
  background: var(--px-bg-elevated);
  border-radius: 3px;
}

:where(.nav-container) .nav-menu-wrapper::-webkit-scrollbar-thumb {
  background: var(--nav-accent);
  border-radius: 3px;
}

.nav-menu,
#nav-menu {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  gap: 4px;
  min-height: 0;
}


:where(.nav-container) .nav-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--px-text-secondary);
  font-family: var(--px-font);
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease, background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  width: 100%;
  text-align: left;
}

:where(.nav-container) .nav-btn:hover {
  background: var(--px-bg-elevated);
  color: var(--px-text-primary);
  border-color: var(--px-border);
}

:where(.nav-container) .nav-btn.active {
  background: var(--nav-accent-subtle);
  color: var(--nav-accent);
  border-color: var(--nav-accent);
  font-weight: 600;
}

:where(.nav-container) .nav-btn.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--nav-accent);
  border-radius: 0 2px 2px 0;
  transition: background-color 0.3s ease;
}

:where(.nav-container) .nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

:where(.nav-container) .nav-btn-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Screen timer - shows time on current screen */
:where(.nav-container) .nav-btn-screen-timer {
  display: none;
  font-family: var(--px-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--nav-accent);
  background: var(--nav-accent-subtle);
  padding: 2px 6px;
  border-radius: 6px;
  margin-left: auto;
  flex-shrink: 0;
  transition: color 0.3s ease, background-color 0.3s ease;
}

:where(.nav-container) .nav-btn.active .nav-btn-screen-timer {
  display: inline-block;
}

/* ========================================
   NAV GROUPS + FLYOUT
   ======================================== */
:where(.nav-container) .nav-group {
  position: relative;
}

/* The group trigger reuses .nav-btn styling; .active look is inherited
   from the existing .nav-btn.active rule. */
:where(.nav-container) .nav-group-chevron {
  flex-shrink: 0;
  margin-left: 8px;
  font-size: 0.7rem;
  line-height: 1;
  color: var(--px-text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
}

.nav-group-trigger:hover .nav-group-chevron,
:where(.nav-container) .nav-group.flyout-open .nav-group-chevron {
  color: var(--nav-accent);
}

:where(.nav-container) .nav-group.flyout-open .nav-group-chevron {
  transform: translateX(3px);
}

/* Flyout panel (desktop default) - fixed so overflow ancestors do not
   clip it; JS positions it at the sidebar's right edge. */
:where(.nav-container) .nav-flyout {
  display: none;
  position: fixed;
  z-index: 200;
  flex-direction: column;
  gap: 2px;
  min-width: 220px;
  max-width: 320px;
  max-height: 70vh;
  overflow-y: auto;
  padding: 8px;
  background: var(--px-bg-card);
  border: 1px solid var(--px-border);
  border-radius: 12px;
  box-shadow: var(--nav-card-shadow);
  scrollbar-width: thin;
  scrollbar-color: var(--nav-scrollbar-thumb) var(--nav-scrollbar-track);
}

:where(.nav-container) .nav-flyout::-webkit-scrollbar {
  width: 6px;
}

:where(.nav-container) .nav-flyout::-webkit-scrollbar-track {
  background: var(--nav-scrollbar-track);
  border-radius: 3px;
}

:where(.nav-container) .nav-flyout::-webkit-scrollbar-thumb {
  background: var(--nav-scrollbar-thumb);
  border-radius: 3px;
}

:where(.nav-container) .nav-flyout.open {
  display: flex;
  animation: navFlyoutIn 0.14s ease forwards;
}

@keyframes navFlyoutIn {
  from { opacity: 0; transform: translateX(-6px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Back row - only visible in the mobile in-drawer drill-down */
:where(.nav-container) .nav-back-btn {
  display: none;
  color: var(--px-text-muted);
  font-weight: 600;
}

:where(.nav-container) .nav-back-btn:hover {
  color: var(--px-text-primary);
}

/* Mobile (<=768px): in-drawer drill-down, no fixed flyout */
@media (max-width: 768px) {
  :where(.nav-container) .nav-flyout {
    position: static;
    z-index: auto;
    min-width: 0;
    max-width: none;
    max-height: none;
    margin-top: 4px;
    padding: 0 0 0 8px;
    background: transparent;
    border: none;
    box-shadow: none;
  }
  :where(.nav-container) .nav-back-btn {
    display: flex;
  }
  :where(.nav-container) .nav-menu.drilled .nav-group:not(.drilled-active) {
    display: none;
  }
  :where(.nav-container) .nav-menu.drilled .nav-group.drilled-active .nav-group-trigger {
    display: none;
  }
  :where(.nav-container) .nav-menu.drilled .nav-group.drilled-active .nav-flyout {
    display: flex;
  }
}

/* ========================================
   FULL-SCREEN MENU LANDING
   ======================================== */
/* The grid, the chrome above and below it and the worded line all
   share one reading width, so it is written once. */
.nav-container.nav-landing {
  --px-landing-width: 760px;
}

.nav-container.nav-landing .nav-header,
.nav-container.nav-landing .nav-logout-section,
.nav-container.nav-landing .nav-timer-section {
  width: 100%;
  max-width: var(--px-landing-width);
  margin: 0 auto;
}

#nav-menu.nav-landing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-content: start;
  gap: 16px;
  width: 100%;
  max-width: var(--px-landing-width);
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* Every group is open INLINE, and it is this rule that opens it - not
   the .open class. Every leaf click runs closeAllFlyouts() in a
   finally, including one whose screen fails to build, so a
   class-driven landing would collapse itself on the first pick. */
#nav-menu.nav-landing .nav-flyout {
  position: static;
  display: flex;
  z-index: auto;
  min-width: 0;
  max-width: none;
  max-height: none;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  animation: none;
}

/* The trigger is a heading here: landing mode never opens a flyout by
   measurement and never enters drill-down. */
#nav-menu.nav-landing .nav-group-trigger {
  cursor: default;
  background: transparent;
  border-color: transparent;
  color: var(--px-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#nav-menu.nav-landing .nav-group-trigger:hover {
  background: transparent;
  border-color: transparent;
  color: var(--px-text-muted);
}

#nav-menu.nav-landing .nav-group-chevron,
#nav-menu.nav-landing .nav-back-btn {
  display: none;
}

:where(.nav-container) .nav-menu-empty {
  display: none;
}

.nav-container.nav-landing-empty .nav-menu-empty {
  display: block;
  max-width: var(--px-landing-width);
  margin: 0 auto;
  padding: 32px 16px;
  color: var(--px-text-secondary);
  text-align: center;
}

/* ========================================
   LOGOUT SECTION - Below user, above timer
   ======================================== */
:where(.nav-container) .nav-logout-section {
  padding: 8px 16px;
  flex-shrink: 0;
}

:where(.nav-container) .nav-timer-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--px-text-muted);
}

:where(.nav-container) .nav-timer-value {
  font-family: var(--px-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--nav-accent);
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

:where(.nav-container) .nav-theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--px-bg-card);
  border: 1px solid var(--px-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  font-size: 18px;
  user-select: none;
}

:where(.nav-container) .nav-theme-toggle:hover {
  border-color: var(--nav-accent);
  box-shadow: 0 0 0 3px var(--nav-accent-glow);
}

/* Logout Button */
:where(.nav-container) .nav-logout-btn {
  width: 100%;
  padding: 12px 14px;
  background: var(--px-bg-card);
  border: 1px solid var(--px-border);
  border-radius: 10px;
  color: var(--nav-danger);
  font-family: var(--px-font);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

:where(.nav-container) .nav-logout-btn:hover {
  background: var(--nav-danger-glow);
  border-color: var(--nav-danger);
}

:where(.nav-container) .nav-logout-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

:where(.nav-container) .nav-logout-icon {
  font-size: 1rem;
}

/* ========================================
   LOADING STATE
   ======================================== */
.nav-container.nav-loading .nav-btn,
.nav-container.nav-loading .nav-logout-btn,
.nav-container.nav-loading .nav-test-btn {
  opacity: 0.4 !important;
  pointer-events: none !important;
  cursor: not-allowed !important;
}

.nav-container.nav-loading .nav-btn {
  animation: none !important;
}

/* ========================================
   ANIMATIONS
   ======================================== */
.nav-fade-in {
  animation: navFadeIn 0.3s ease forwards;
}

@keyframes navFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Staggered group reveal - only on initial render. Opacity-only (no
   transform) so nothing lingers to interfere with flyout positioning. */
:where(.nav-container) .nav-menu:not(.nav-revealed) .nav-group {
  opacity: 0;
  animation: navFadeIn 0.25s ease forwards;
}

:where(.nav-container) .nav-menu.nav-revealed .nav-group {
  opacity: 1;
}

:where(.nav-container) .nav-menu:not(.nav-revealed) .nav-group:nth-child(1) { animation-delay: 0.04s; }
:where(.nav-container) .nav-menu:not(.nav-revealed) .nav-group:nth-child(2) { animation-delay: 0.08s; }
:where(.nav-container) .nav-menu:not(.nav-revealed) .nav-group:nth-child(3) { animation-delay: 0.12s; }
:where(.nav-container) .nav-menu:not(.nav-revealed) .nav-group:nth-child(4) { animation-delay: 0.16s; }
:where(.nav-container) .nav-menu:not(.nav-revealed) .nav-group:nth-child(n+5) { animation-delay: 0.20s; }