/* ==========================================================================
   Navigation — Desktop horizontal menu + glass dropdown
   BEM: .jsf-nav__*
   ========================================================================== */

.jsf-nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: center;
}

.jsf-nav__menu {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.jsf-nav__item {
  position: relative;
}

.jsf-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-xs) 2px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: var(--fw-semibold);
  color: var(--color-heading);
  transition: color var(--transition-fast);
}

/* Animated underline growing from the center */

.jsf-nav__link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: width var(--transition-fast);
}

.jsf-nav__link:hover,
.jsf-nav__link:focus-visible {
  color: var(--color-primary);
}

.jsf-nav__link:hover::after,
.jsf-nav__link:focus-visible::after {
  width: 100%;
}

.jsf-nav__item--current > .jsf-nav__link {
  color: var(--color-primary);
}

.jsf-nav__item--current > .jsf-nav__link::after {
  width: 100%;
}

.jsf-nav__chevron {
  flex-shrink: 0;
  width: 10px;
  height: 6px;
  max-width: none;
  transition: transform var(--transition-fast);
}

.jsf-nav__item--has-children:hover .jsf-nav__chevron,
.jsf-nav__item--has-children:focus-within .jsf-nav__chevron {
  transform: rotate(180deg);
}

/* ---------- Dropdown (glass card) ---------- */

.jsf-nav__submenu {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px) scale(.98);
  min-width: 240px;
  list-style: none;
  margin: 0;
  padding: var(--space-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-medium);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 300ms var(--ease-premium), transform 300ms var(--ease-premium),
              visibility 300ms;
  z-index: var(--z-dropdown);
}

.jsf-nav__item--has-children:hover > .jsf-nav__submenu,
.jsf-nav__item--has-children:focus-within > .jsf-nav__submenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.jsf-nav__item--sub {
  width: 100%;
}

.jsf-nav__sublink {
  display: flex;
  align-items: center;
  width: 100%;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-body);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.jsf-nav__sublink:hover,
.jsf-nav__sublink:focus-visible {
  background: var(--color-highlight);
  color: var(--color-primary);
}

.jsf-nav__item--sub.jsf-nav__item--current > .jsf-nav__sublink {
  color: var(--color-primary);
  background: var(--color-highlight);
}

/* Nested (third level, rendered as second submenu level) */

.jsf-nav__submenu .jsf-nav__submenu {
  position: static;
  transform: none;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  box-shadow: none;
  border: none;
  background: transparent;
  backdrop-filter: none;
  padding-left: var(--space-sm);
  margin-top: var(--space-2xs);
}

/* ---------- Hide desktop nav below breakpoint ---------- */

@media (max-width: 1024px) {
  .jsf-nav {
    display: none;
  }
}