/* Header layout */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-4);
}

/* Brand */
.site-header__brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  gap: 0.75rem;
  text-align: left;
}

.site-header__logo-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 0%, #fef9c3, transparent 55%),
              linear-gradient(135deg, #facc15, #c49a3a);
  box-shadow: var(--shadow-md);
}

.site-header__logo-icon {
  color: #111827;
  font-size: 1.25rem;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
}

.site-header__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text);
}

.site-header__brand-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Navigation */
.site-header__nav {
  position: relative;
}

.site-header__nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__nav-item--cta {
  margin-left: var(--space-2);
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: 0.1rem;
  padding-block: 0.25rem;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.25rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #facc15, #c49a3a);
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.site-header__nav-link:hover {
  color: var(--color-text);
}

.site-header__nav-link:hover::after {
  transform: scaleX(1);
}

.site-header__nav-link--active {
  color: var(--color-text);
  font-weight: 500;
}

.site-header__nav-link--active::after {
  transform: scaleX(1);
}

.site-header__nav-link--button {
  padding-inline: 1rem;
  padding-block: 0.5rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #d4af37, var(--color-primary));
  color: #111827;
  box-shadow: var(--shadow-sm);
}

.site-header__nav-link--button::after {
  display: none;
}

.site-header__nav-link--button:hover {
  color: #111827;
  box-shadow: var(--shadow-md);
}

.site-header__nav-link--button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Mobile navigation toggle */
.site-header__nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-text);
}

.site-header__nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  gap: 0.25rem;
}

.site-header__nav-toggle-line {
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), translate var(--transition-base);
}

.site-header__nav-toggle-text {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

/* Mobile behaviour */
@media (max-width: 767.98px) {
  .site-header__inner {
    flex-wrap: wrap;
  }

  .site-header__brand {
    order: 1;
  }

  .site-header__nav-toggle {
    order: 2;
  }

  .site-header__nav {
    order: 3;
    width: 100%;
  }

  .site-header__nav-list {
    position: relative;
    margin-top: var(--space-3);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.4);
    background: radial-gradient(circle at top left, rgba(212, 175, 55, 0.12), transparent 60%),
                var(--color-surface-elevated);
    box-shadow: var(--shadow-md);
  }

  .site-header__nav-link {
    justify-content: flex-start;
    padding-block: 0.35rem;
  }

  .site-header__nav-item--cta {
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .site-header__nav[hidden] {
    display: none !important;
  }
}

/* Desktop behaviour */
@media (min-width: 768px) {
  .site-header__inner {
    padding-block: var(--space-4);
  }

  .site-header__brand {
    margin-inline: 0;
  }

  .site-header__brand-name {
    font-size: var(--text-xs);
  }

  .site-header__nav-toggle {
    display: none;
  }
}

/* Toggle open state animations */
.site-header__nav-toggle[aria-expanded="true"] .site-header__nav-toggle-line:first-child {
  transform: translateY(4px) rotate(45deg);
}

.site-header__nav-toggle[aria-expanded="true"] .site-header__nav-toggle-line:last-child {
  transform: translateY(-4px) rotate(-45deg);
}