/*
 * Fixed top app bar. backdrop-filter: blur(12px) creates a frosted-glass
 * effect (content scrolls under while the bar stays legible).
 * The hard shadow (0 4px 0 0) mimics a raised game-UI block feel.
 */
.top-app-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-md);
  background-color: var(--color-bg);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--color-primary);
  box-shadow: 0 4px 0 0 var(--color-dark);
  max-width: 100%;
  margin: 0 auto;
}

.top-app-bar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.top-app-bar__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-default);
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--home-shadow-hard);
}

.top-app-bar__icon {
  font-size: 24px;
  color: var(--color-dark);
}

.top-app-bar__title {
  font-family: var(--font-headline);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-headline);
  color: var(--color-primary);
  text-shadow: 2px 2px 0 var(--color-dark);
  white-space: nowrap;
}

.top-app-bar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.top-app-bar__btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-default);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

/* Slight lift on hover — the shadow disappears to simulate the button popping up */
.top-app-bar__btn:hover {
  transform: translateY(2px);
  box-shadow: none;
}

.top-app-bar__btn:active {
  transform: scale(0.95);
}

.top-app-bar__btn-icon {
  font-size: var(--text-xl);
}

/*
 * User pill — full border-radius creates a capsule shape.
 * The border uses color-mix to produce a faint primary-tinted outline that
 * adapts to the theme without a separate variable.
 */
.top-app-bar__user {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background-color: var(--home-color-surface-low);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-full);
  border: 2px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  cursor: pointer;
  user-select: none;
}

.top-app-bar__username {
  font-family: var(--font-headline);
  font-size: var(--text-md);
  font-weight: var(--font-weight-headline);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 120px;
}

.top-app-bar__username--desktop {
  display: none;
}

@media (min-width: 768px) {
  .top-app-bar {
    padding: var(--space-md) var(--space-lg);
  }

  .top-app-bar__title {
    font-size: var(--text-2xl);
  }

  .top-app-bar__username--desktop {
    display: inline;
    max-width: 180px;
  }
}

.top-app-bar__user-icon {
  color: var(--color-accent);
  font-size: 24px;
}

/* Light mode: toggle button uses dark navy instead of muted gray */
[data-theme="light"] .top-app-bar__btn {
  color: var(--color-dark);
}