/* ==========================================================================
   AUTHIFY — Navbar + Mega Menu
   Floating, glass, x.ai-inspired proportions and centering.
   ========================================================================== */

.nav-wrap{
  position: fixed;
  top: var(--space-sm);
  left: 0; right: 0;
  z-index: var(--z-nav);
  display: flex;
  justify-content: center;
  padding-inline: var(--container-pad);
  pointer-events: none;
}

.nav{
  pointer-events: auto;
  width: 100%;
  max-width: var(--container-w);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0.55rem 0.6rem 0.55rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  box-shadow: var(--shadow-glass);
  transition: background var(--dur-mid) var(--ease-smooth),
              box-shadow var(--dur-mid) var(--ease-smooth),
              backdrop-filter var(--dur-mid) var(--ease-smooth),
              border-color var(--dur-mid) var(--ease-smooth);
}

.nav.is-scrolled{
  background: var(--glass-surface-strong);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  box-shadow: var(--shadow-float);
}

.nav__logo{ display: flex; align-items: center; height: 26px; flex-shrink: 0; }
.nav__logo img{ height: 100%; width: auto; }

.nav__links{
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.nav__link{
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--dur-fast) var(--ease-smooth), background var(--dur-fast) var(--ease-smooth);
}
.nav__link:hover, .nav__link[aria-expanded="true"]{ color: var(--color-text); background: var(--glass-surface); }
.nav__link .icon{ width: 0.85em; height: 0.85em; transition: transform var(--dur-fast) var(--ease-glass); }
.nav__link[aria-expanded="true"] .icon{ transform: rotate(180deg); }

.nav__actions{ display: flex; align-items: center; gap: var(--space-2xs); flex-shrink: 0; }
.nav__actions .theme-toggle{ width: 2.4rem; height: 2.4rem; flex-shrink: 0; }

.nav__toggle{
  display: none;
  width: 2.5rem; height: 2.5rem;
  align-items: center; justify-content: center;
  border-radius: var(--radius-full);
}
.nav__toggle .icon{ width: 1.25rem; height: 1.25rem; }

.theme-toggle{ position: relative; }
.theme-toggle .icon{ position: absolute; transition: opacity var(--dur-mid) var(--ease-smooth), transform var(--dur-mid) var(--ease-glass); }
.theme-toggle .icon--sun{ opacity: 1; transform: rotate(0deg) scale(1); }
.theme-toggle .icon--moon{ opacity: 0; transform: rotate(-60deg) scale(0.5); }
[data-theme="dark"] .theme-toggle .icon--sun{ opacity: 0; transform: rotate(60deg) scale(0.5); }
[data-theme="dark"] .theme-toggle .icon--moon{ opacity: 1; transform: rotate(0deg) scale(1); }

/* ---- Mega menu ------------------------------------------------------- */
.mega{
  position: fixed;
  top: calc(var(--space-sm) + 60px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  width: min(760px, calc(100vw - 2 * var(--container-pad)));
  z-index: var(--z-mega);
  background: var(--glass-surface-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  box-shadow: var(--shadow-float);
  padding: var(--space-md);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 260ms var(--ease-out), transform 260ms var(--ease-out), visibility 260ms;
}
.mega.is-open{
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega__grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xs);
}
.mega__item{
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: background var(--dur-fast) var(--ease-smooth), transform var(--dur-fast) var(--ease-glass);
}
.mega__item:hover{ background: var(--glass-surface); transform: translateY(-2px); }
.mega__icon{
  width: 2.75rem; height: 2.75rem;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  color: var(--gold-500);
}
.mega__icon .icon{ width: 1.3rem; height: 1.3rem; }
.mega__body h4{ font-size: var(--text-sm); margin-bottom: 0.2rem; display:flex; align-items:center; gap:.4em;}
.mega__body p{ font-size: calc(var(--text-xs) * 0.8); line-height: var(--lh-snug); }
.mega__item .arrow{ opacity: 0; transform: translateX(-4px); transition: all var(--dur-fast) var(--ease-glass); width: 0.9em; height: 0.9em; color: var(--gold-500); }
.mega__item:hover .arrow{ opacity: 1; transform: translateX(0); }

.mega__foot{
  margin-top: var(--space-xs);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

/* ---- Mobile ------------------------------------------------------------ */
.nav__overlay{
  position: fixed; inset: 0;
  background: var(--scrim);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  z-index: var(--z-overlay);
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-mid) var(--ease-smooth), visibility var(--dur-mid);
}
.nav__overlay.is-open{ opacity: 1; visibility: visible; }

.nav__drawer{
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: min(360px, 86vw);
  background: var(--color-bg-elevated);
  border-left: 1px solid var(--color-border);
  z-index: calc(var(--z-overlay) + 1);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-glass);
  padding: var(--space-lg) var(--space-md);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.nav__drawer.is-open{ transform: translateX(0); }

.nav__drawer-head{ display: flex; justify-content: space-between; align-items: center; }

.drawer-group summary{
  list-style: none;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-sm) 0;
  font-weight: 600;
  font-size: var(--text-lg);
  cursor: pointer;
}
.drawer-group summary::-webkit-details-marker{ display: none; }
.drawer-group summary .icon{ width: 1em; height: 1em; transition: transform var(--dur-fast) var(--ease-glass); }
.drawer-group[open] summary .icon{ transform: rotate(180deg); }
.drawer-group .drawer-list{ padding-bottom: var(--space-sm); display: flex; flex-direction: column; gap: var(--space-2xs); }
.drawer-link{ font-weight: 600; font-size: var(--text-lg); padding: var(--space-sm) 0; display: block; border-bottom: 1px solid var(--color-border); }

/* Mobile drawer mega-menu items — mirrors the desktop mega menu tiles */
.drawer-mega-item{
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  transition: background var(--dur-fast) var(--ease-smooth);
}
.drawer-mega-item:active{ background: var(--glass-surface-strong); }
.drawer-mega-item .mega__icon{ width: 2.5rem; height: 2.5rem; }
.drawer-mega-item .mega__icon .icon{ width: 1.2rem; height: 1.2rem; }
.drawer-mega-item h4{ font-size: var(--text-sm); margin-bottom: 0.15rem; }
.drawer-mega-item p{ font-size: calc(var(--text-xs) * 0.8); line-height: var(--lh-snug); }
.drawer-mega-item--compact{ align-items: center; }
.drawer-mega-item--compact h4{ margin-bottom: 0; }

.nav__drawer-foot{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}
.nav__drawer-foot span{ font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 600; }

.nav__drawer .btn{ width: 100%; }
.nav__drawer .btn--icon{ width: 2.25rem; height: 2.25rem; flex-shrink: 0; }

@media (max-width: 900px){
  .nav__links{ display: none; }
  .nav__toggle{ display: inline-flex; }
  .nav__actions .btn--secondary{ display: none; }
  .nav__actions .btn--primary{ display: none; }
  .nav__actions .theme-toggle{ display: none; }
}