/* JLAS platform nav — unified with site-header (matches index / marketing design) */
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=block');
@import url('/css/components/dropdowns-dedb7d79e4db3a1c49f7d8b61923b670.css');
@import url('/css/components/user-menu-a1d739a262d658e292db521714e425ba.css');

/* Navigation bar display setting across pages */

.jlas-platform-nav {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header, 40);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4, 16px);
  height: var(--header-height, 72px);
  padding: 0 var(--space-6, 32px);
  width: 100%;
  max-width: none;
  box-sizing: border-box;
  margin-inline: auto;
  background: var(--color-surface-lowest, #ffffff) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border-bottom: none !important;
  font-family: var(--font-body, Inter, system-ui, sans-serif);
  color: var(--color-on-surface);
  transition: background-color var(--dur-medium, 300ms) ease, border-color var(--dur-medium, 300ms) ease, box-shadow var(--dur-medium, 300ms) ease;
}

/* Unified nav: semi-transparent dark backdrop ensures white text is always
   readable regardless of sakura gradient position at top of page.
   Note: z-index:-1 puts it behind nav content; position:absolute ensures
   the ::before fills the nav height set by parent. */
.jlas-platform-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-surface-lowest, #ffffff) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  pointer-events: none;
  z-index: -1;
}

.jlas-platform-nav__brand {
  flex-shrink: 0;
  font-family: var(--font-headline, "Instrument Serif", serif);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.04em;
  color: var(--color-primary) !important;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.jlas-platform-nav__brand:hover {
  color: var(--color-primary) !important;
}

.jlas-platform-nav__brand .brand-logo__img {
  width: 36px;
  height: 36px;
}

.jlas-platform-nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: nowrap;
  justify-content: center;
  flex: 1;
  margin: 0;
}

.jlas-platform-nav__links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border-radius: 0;
  font-family: var(--font-body, Inter, system-ui, sans-serif);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 500;
  color: var(--color-on-surface-variant) !important;
  text-decoration: none;
  white-space: nowrap;
  transition: color 300ms ease;
  position: relative;
  cursor: pointer;
  pointer-events: auto;
  background: transparent !important;
}

.jlas-platform-nav__links a:hover {
  color: var(--color-primary) !important;
  background: transparent !important;
}

.jlas-platform-nav__links a.is-active {
  color: var(--color-primary) !important;
  background: transparent !important;
}

.jlas-platform-nav__links a.is-active::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-primary);
}

.jlas-platform-nav__links a::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 1px;
  background: #ffffff;
  transition: width 300ms ease;
}

.jlas-platform-nav__links a:hover::after {
  width: 100%;
}

.jlas-platform-nav__links a i {
  font-size: 0.95em;
  opacity: 1;
}

/* Actions slot (right side: theme toggle, set selector, back, …) */
.jlas-platform-nav__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  margin-left: 0;
}

.jlas-platform-nav__actions a,
.jlas-platform-nav__actions button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  border-radius: 0;
  font-size: var(--text-sm, 0.875rem);
  font-weight: 500;
  color: var(--color-on-surface-variant) !important;
  text-decoration: none;
  white-space: nowrap;
  background: transparent !important;
  border: none;
  cursor: pointer;
  transition: color 300ms ease;
}

.jlas-platform-nav__actions a:hover,
.jlas-platform-nav__actions button:hover {
  color: var(--color-primary) !important;
  background: transparent !important;
}

.jlas-platform-nav__actions .btn,
.jlas-platform-nav__actions .button-secondary,
.jlas-platform-nav__actions .button-primary,
.jlas-platform-nav__actions .button-icon-circular,
.jlas-platform-nav__actions .btn-icon,
.jlas-platform-nav__actions .set-select,
.jlas-platform-nav__actions .badge {
  flex-shrink: 0;
}

/* Light page variant (used on flashcard light pages) */
.jlas-platform-nav--light,
.jlas-platform-nav--flashcard {
  color: var(--color-on-surface, #161d1f);
}

.jlas-platform-nav--light .jlas-platform-nav__brand,
.jlas-platform-nav--flashcard .jlas-platform-nav__brand {
  color: var(--color-primary) !important;
}

.jlas-platform-nav--light .jlas-platform-nav__links a,
.jlas-platform-nav--flashcard .jlas-platform-nav__links a {
  color: var(--color-on-surface-variant) !important;
}

.jlas-platform-nav--light .jlas-platform-nav__links a:hover,
.jlas-platform-nav--light .jlas-platform-nav__links a.is-active,
.jlas-platform-nav--flashcard .jlas-platform-nav__links a:hover,
.jlas-platform-nav--flashcard .jlas-platform-nav__links a.is-active {
  color: var(--color-primary) !important;
}

.jlas-platform-nav--light .jlas-platform-nav__links a::after,
.jlas-platform-nav--flashcard .jlas-platform-nav__links a::after {
  background: var(--color-primary);
}

.jlas-platform-nav--light .jlas-platform-nav__actions a,
.jlas-platform-nav--light .jlas-platform-nav__actions button,
.jlas-platform-nav--flashcard .jlas-platform-nav__actions a,
.jlas-platform-nav--flashcard .jlas-platform-nav__actions button {
  color: var(--color-on-surface-variant) !important;
}

.jlas-platform-nav--light .jlas-platform-nav__actions a:hover,
.jlas-platform-nav--light .jlas-platform-nav__actions button:hover,
.jlas-platform-nav--flashcard .jlas-platform-nav__actions a:hover,
.jlas-platform-nav--flashcard .jlas-platform-nav__actions button:hover {
  color: var(--color-primary) !important;
}

@media (max-width: 900px) {
  .jlas-platform-nav {
    height: auto;
    min-height: var(--header-height, 72px);
    padding: var(--space-3, 12px) var(--space-4, 16px);
    flex-wrap: wrap;
    gap: var(--space-2, 8px);
  }

  .jlas-platform-nav__links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-4, 16px);
  }

  .jlas-platform-nav__links a {
    flex-shrink: 0;
  }

  .jlas-platform-nav__actions {
    margin-left: auto;
  }
}