/* Header-specific styles for Mindpuzzlehub */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  gap: var(--space-4);
}

.header-brand {
  display: flex;
  align-items: center;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.1rem 0;
}

.header-logo-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: conic-gradient(from 180deg, var(--color-accent-blue), var(--color-primary), var(--color-accent-purple), var(--color-accent-orange), var(--color-accent-blue));
  box-shadow: var(--shadow-xs);
}

.header-logo-text {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

/* Navigation */

.header-nav {
  margin-left: auto;
}

.header-nav-list {
  list-style: none;
}

.header-nav-item {
  position: relative;
}

.header-nav-item .nav-link {
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.header-nav-item .nav-link::after {
  bottom: -0.35rem;
}

/* Mobile toggle */

.header-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--color-text);
  background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.15), transparent),
              var(--color-surface-soft);
}

.header-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
}

.header-toggle-line {
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background-color: var(--gray-300);
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.header-toggle-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Toggle open state */

.header-toggle.is-open .header-toggle-line:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.header-toggle.is-open .header-toggle-line:nth-child(2) {
  opacity: 0;
}

.header-toggle.is-open .header-toggle-line:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Responsive behavior */

@media (max-width: 768px) {
  .header-nav {
    position: fixed;
    inset-inline: 0;
    top: 56px;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.9));
    border-bottom: 1px solid rgba(148, 163, 184, 0.35);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .header-nav-list {
    flex-direction: column;
    padding: var(--space-4) var(--space-4) var(--space-5);
    gap: var(--space-3);
  }

  .header-nav-item .nav-link {
    width: 100%;
    padding: 0.35rem 0;
  }

  .header-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

@media (min-width: 769px) {
  .header-toggle {
    display: none;
  }

  .header-nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-4);
  }
}

/* Focus styles */

.header-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.header-nav-item .nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}