/* ============================================================
   TrifocusUX — Navigation v2
   Dark brand-navy bar, purposeful dropdowns, smooth UX
   ============================================================ */

/* ── Custom properties ──────────────────────────────────────── */
:root {
  --nav-bg:           #3A4B5C;
  --nav-bg-hover:     #4A5B6C;
  --nav-border:       rgba(138, 154, 170, 0.2);
  --nav-text:         #CBD5E1;
  --nav-text-active:  #FFFFFF;
  --nav-accent:       #8A9AAA;
  --nav-accent-glow:  rgba(138, 154, 170, 0.3);
  --nav-height:       62px;
  --nav-font:         'Inter', system-ui, sans-serif;
  --nav-radius:       10px;
  --nav-shadow:       0 4px 24px rgba(0,0,0,0.35);

  --badge-ai:         #5A6A7A;
  --badge-new:        #22C55E;
  --badge-deep:       #8B5CF6;
  --badge-xr:         #F59E0B;

  --transition-fast:  150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-med:   220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Container ──────────────────────────────────────────────── */
.navigation-container {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  animation: navFadeIn 0.2s ease forwards;
}

/* ── Nav bar ────────────────────────────────────────────────── */
.ai-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: var(--nav-height);
  padding: 0 20px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: var(--nav-shadow);
  font-family: var(--nav-font);
}

/* ── Brand ──────────────────────────────────────────────────── */
.nav-brand {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  flex-shrink: 0;
}

.brand-link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1;
  gap: 3px;
}

.brand-wordmark {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: #FFFFFF;
  font-family: var(--nav-font);
}

.brand-tagline {
  font-size: 0.65rem;
  color: var(--nav-accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ── Nav items container ────────────────────────────────────── */
.nav-items {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

/* ── Plain nav item ─────────────────────────────────────────── */
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--nav-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
  cursor: pointer;
}

.nav-item:hover,
.nav-item:focus-visible {
  background: var(--nav-bg-hover);
  color: var(--nav-text-active);
  outline: none;
}

.nav-item.active {
  color: var(--nav-text-active);
  background: rgba(138, 154, 170, 0.12);
  position: relative;
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--nav-accent);
  border-radius: 2px 2px 0 0;
}

.nav-item .nav-icon {
  font-size: 0.88rem;
  opacity: 0.75;
}

.nav-item .nav-label,
.nav-dropdown-trigger .nav-label {
  font-size: 0.68rem;
  font-weight: 400;
  opacity: 0.85;
  letter-spacing: 0.01em;
}

.nav-item.highlight {
  background: var(--nav-accent);
  color: #FFFFFF;
  font-weight: 600;
}

.nav-item.highlight:hover {
  opacity: 0.9;
}

.nav-item.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* ── Dropdown wrapper ───────────────────────────────────────── */
.nav-dropdown {
  position: relative;
}

/* ── Dropdown trigger ───────────────────────────────────────── */
.nav-dropdown-trigger {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 10px;
  border: none;
  border-radius: 6px;
  background: transparent;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--nav-text);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-family: var(--nav-font);
  position: relative;
}

.nav-dropdown-trigger:hover,
.nav-dropdown-trigger:focus-visible {
  background: var(--nav-bg-hover);
  color: var(--nav-text-active);
  outline: none;
}

.nav-dropdown.has-active .nav-dropdown-trigger {
  color: var(--nav-text-active);
  background: rgba(138, 154, 170, 0.12);
}

.nav-dropdown-trigger .nav-icon {
  font-size: 0.88rem;
  opacity: 0.75;
}

.dropdown-arrow {
  font-size: 0.5rem;
  opacity: 0.5;
  position: absolute;
  top: 4px;
  right: 2px;
  transition: transform var(--transition-fast);
}

.nav-dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

/* ── Dropdown menu ──────────────────────────────────────────── */
.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 224px;
  background: #2A3B4C;
  border: 1px solid var(--nav-border);
  border-radius: var(--nav-radius);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(138,154,170,0.08);
  padding: 6px;
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  transition: opacity var(--transition-med), transform var(--transition-med);
  z-index: 1050;
}

.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* ── Dropdown item ──────────────────────────────────────────── */
.nav-dropdown-menu .dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 450;
  color: var(--nav-text);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-dropdown-menu .dropdown-item:hover,
.nav-dropdown-menu .dropdown-item:focus-visible {
  background: rgba(138, 154, 170, 0.15);
  color: var(--nav-text-active);
  outline: none;
}

.nav-dropdown-menu .dropdown-item.active {
  background: rgba(138, 154, 170, 0.2);
  color: var(--nav-text-active);
}

.nav-dropdown-menu .dropdown-item.danger {
  color: #FC8181;
}

.nav-dropdown-menu .dropdown-item.danger:hover {
  background: rgba(252, 129, 129, 0.1);
  color: #FEB2B2;
}

.dropdown-icon {
  font-size: 0.78rem;
  width: 16px;
  text-align: center;
  opacity: 0.65;
  flex-shrink: 0;
}

.dropdown-label {
  font-size: 0.82rem;
}

/* ── Dropdown separator ─────────────────────────────────────── */
.dropdown-separator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 4px;
  margin-top: 4px;
}

.dropdown-separator::before {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--nav-border);
}

.dropdown-separator span {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(138, 154, 170, 0.6);
  white-space: nowrap;
}

.dropdown-separator::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--nav-border);
}

/* ── Dropdown divider (legacy compat) ──────────────────────── */
.dropdown-divider {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem 0.25rem;
  margin-top: 0.25rem;
  border-top: 1px solid var(--nav-border);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(138, 154, 170, 0.5);
  pointer-events: none;
}

.dropdown-divider-icon {
  font-size: 0.7rem;
  opacity: 0.7;
}

.dropdown-divider-label {
  font-size: 0.7rem;
}

/* ── Badges ─────────────────────────────────────────────────── */
.dropdown-badge {
  margin-left: auto;
  padding: 1px 6px;
  border-radius: 20px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #fff;
}

.badge-ai   { background: var(--badge-ai);   }
.badge-new  { background: var(--badge-new);  }
.badge-deep { background: var(--badge-deep); }
.badge-xr   { background: var(--badge-xr);  color: #000; }

/* ── Nav status (right side) ────────────────────────────────── */
.nav-status {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding-left: 12px;
}

.user-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--nav-text);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.authenticated .status-dot { background: #22C55E; box-shadow: 0 0 6px #22C55E; }
.guest         .status-dot { background: var(--nav-accent); }

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--nav-accent);
  animation: pulse 2s ease-in-out infinite;
}

.user-status.authenticated .status-indicator {
  background: #22C55E;
}

.user-status.guest .status-indicator {
  background: var(--nav-accent);
}

.user-status.anonymous .status-indicator {
  background: rgba(138, 154, 170, 0.5);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-label { white-space: nowrap; }

.status-text {
  font-weight: 500;
  color: var(--nav-text);
}

.user-name {
  font-weight: 600;
  color: var(--nav-text-active);
}

.status-upgrade,
.status-signin {
  padding: 4px 10px;
  border-radius: 5px;
  background: var(--nav-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.status-upgrade:hover,
.status-signin:hover { opacity: 0.85; color: #fff; }

.upgrade-link,
.login-prompt {
  font-weight: 600;
  color: var(--nav-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

.upgrade-link:hover,
.login-prompt:hover {
  color: var(--nav-text-active);
  text-decoration: underline;
}

/* ── Theme toggle ───────────────────────────────────────────── */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 6px;
  background: rgba(255,255,255,0.06);
  color: var(--nav-text);
  cursor: pointer;
  font-size: 0.8rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--nav-bg-hover);
  color: var(--nav-text-active);
}

/* ── Mobile hamburger ───────────────────────────────────────── */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 6px;
  margin-left: 4px;
}

.hamburger-line {
  display: block;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: transform var(--transition-med), opacity var(--transition-fast);
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--nav-text);
  position: relative;
  transition: background 0.2s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--nav-text);
  left: 0;
  transition: transform 0.2s ease;
}

.hamburger::before { top: -7px; }
.hamburger::after { bottom: -7px; }

.mobile-menu-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg) translateY(7px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg) translateY(-7px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile overlay + drawer ────────────────────────────────── */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1200;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  backdrop-filter: blur(2px);
}

.nav-mobile-overlay[hidden] { display: none; }

.nav-mobile-drawer {
  width: 300px;
  height: 100dvh;
  background: #3A4B5C;
  border-left: 1px solid var(--nav-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: -8px 0 40px rgba(0,0,0,0.5);
}

.nav-mobile-content {
  background: #3A4B5C;
  width: 320px;
  max-width: 90%;
  height: 100%;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--nav-border);
}

.mobile-drawer-header .brand-wordmark {
  font-size: 1rem;
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--nav-border);
}

.mobile-nav-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nav-text-active);
  margin: 0;
}

.mobile-nav-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 6px;
  background: rgba(255,255,255,0.06);
  color: var(--nav-text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition-fast);
}

.mobile-nav-close:hover { background: rgba(255,255,255,0.12); color: #fff; }

.mobile-nav-close:focus-visible {
  outline: 2px solid var(--nav-accent);
  outline-offset: 2px;
}

.mobile-nav-items {
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}

.mobile-nav-items .nav-item {
  justify-content: flex-start;
  padding: 10px 12px;
  font-size: 0.85rem;
  color: var(--nav-text);
}

.mobile-nav-items .nav-item:hover,
.mobile-nav-items .nav-item.active {
  background: rgba(138, 154, 170, 0.12);
  color: #fff;
}

.mobile-nav-items .nav-icon {
  font-size: 1.25rem;
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 7px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--nav-text);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
  background: rgba(138, 154, 170, 0.12);
  color: #fff;
}

.mobile-nav-section {
  margin-bottom: 4px;
}

.mobile-nav-section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px 4px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--nav-accent);
  opacity: 0.8;
}

.mobile-nav-section-header:first-child {
  border-top: none;
  margin-top: 0;
}

.mobile-nav-children {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding-left: 8px;
}

.mobile-nav-child {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--nav-text);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-child:hover,
.mobile-nav-child.active {
  background: rgba(138, 154, 170, 0.1);
  color: #fff;
}

.mobile-nav-child.danger { color: #FC8181; }

.mobile-nav-divider {
  padding: 0.5rem 1rem 0.25rem;
  margin-top: 0.25rem;
  border-top: 1px solid var(--nav-border);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(138, 154, 170, 0.5);
}

.mobile-nav-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--nav-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-nav-footer .user-status {
  width: 100%;
  justify-content: center;
}

/* ── Dark mode overrides ────────────────────────────────────── */
[data-theme="dark"] .nav-dropdown-menu { background: #1E2D3D; }

/* ── Body offset ────────────────────────────────────────────── */
body {
  padding-top: 0;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .nav-item .nav-label,
  .nav-dropdown-trigger .nav-label {
    display: none;
  }
  .nav-item,
  .nav-dropdown-trigger {
    padding: 7px 9px;
    flex-direction: row;
  }
  .dropdown-arrow {
    position: static;
    margin-left: 2px;
  }
}

@media (max-width: 768px) {
  .ai-navigation {
    padding: 0 1rem;
  }

  .nav-items {
    display: none;
  }

  .nav-status .user-status .status-label {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }
}

@media (max-width: 480px) {
  .ai-navigation {
    padding: 0 0.75rem;
  }

  .brand-tagline {
    display: none;
  }

  .nav-mobile-content,
  .nav-mobile-drawer {
    width: 100%;
    max-width: 100%;
  }
}

/* ── Accessibility: Reduced Motion ──────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Notification toast ─────────────────────────────────────── */
.tfux-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 11px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  z-index: 9999;
  animation: tfuxSlideIn 0.25s ease forwards;
  font-family: var(--nav-font);
}

.tfux-notification-success { background: #1A3A2A; border: 1px solid #22C55E; color: #86EFAC; }
.tfux-notification-info    { background: #2A3B4C; border: 1px solid var(--nav-accent); }

@keyframes tfuxSlideIn {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0);    }
}

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 6px;
  z-index: 10000;
  animation: tfuxSlideIn 0.3s ease forwards;
  font-family: var(--nav-font);
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.notification.success {
  background: #1A3A2A;
  border: 1px solid #22C55E;
  color: #86EFAC;
}

.notification.info {
  background: #2A3B4C;
  border: 1px solid var(--nav-accent);
  color: var(--nav-text);
}

.notification.error {
  background: #3A1A1A;
  border: 1px solid #EF4444;
  color: #FCA5A5;
}

/* ── Smooth page-load reveal ────────────────────────────────── */
@keyframes navFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0);    }
}