/* Header-specific styles for PITTRAD LTD */

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

.site-header-inner {
  min-height: 3.5rem;
}

.site-branding {
  display: flex;
  align-items: center;
}

.site-logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.site-logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: radial-gradient(circle at 20% 20%, #2f70c1, var(--color-primary));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

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

.site-logo-name {
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gray-900);
}

.site-logo-tagline {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Navigation */

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

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

.nav-item {
  display: inline-flex;
}

.nav-item-cta {
  margin-left: var(--space-4);
}

.nav-cta {
  font-size: var(--font-size-xs);
}

/* Mobile nav toggle */

.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--gray-300);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  background-color: #ffffff;
}

.nav-toggle-bar {
  width: 18px;
  height: 2px;
  background-color: var(--gray-800);
  border-radius: 999px;
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

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

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Responsive navigation behaviour */

@media (max-width: 768px) {
  .site-header-inner {
    gap: var(--space-2);
  }

  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: #ffffff;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity var(--transition-slow), transform var(--transition-slow), visibility var(--transition-slow);
  }

  .site-nav.is-open {
    opacity: 1;
    transform: scaleY(1);
    pointer-events: auto;
    visibility: visible;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    padding: var(--space-3) var(--space-4) var(--space-4);
    gap: var(--space-2);
  }

  .nav-item,
  .nav-item-cta {
    display: block;
    margin-left: 0;
  }

  .nav-cta {
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
}

@media (min-width: 769px) {
  .site-nav {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border-bottom: 0;
  }

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

/* Active nav link helper class (to be applied server-side) */

.nav-link--active {
  color: var(--color-primary-strong);
  border-color: var(--color-primary);
}

/* Reduce motion preference */

@media (prefers-reduced-motion: reduce) {
  .site-nav {
    transition: none;
  }

  .nav-toggle-bar {
    transition: none;
  }
}