/* Header styles for TRF CONSTRUCTION LTD */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

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

.site-header__branding {
  display: flex;
  align-items: center;
  min-width: 0;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-900);
}

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.6rem;
  background: linear-gradient(135deg, var(--color-primary), #163756);
  color: #ffffff;
  font-weight: 700;
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
}

.site-header__text-group {
  display: flex;
  flex-direction: column;
}

.site-header__site-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

/* Navigation */

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

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

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  padding: 0.25rem 0;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 999px;
  transition: width var(--transition-base);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  width: 100%;
}

.site-header__nav-link--active {
  color: var(--color-primary);
}

.site-header__nav-link--active::after {
  width: 100%;
}

/* Call to action */

.site-header__cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__cta-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

.site-header__cta-link i {
  color: var(--color-primary);
}

.site-header__cta-button {
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

/* Mobile menu toggle */

.site-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--gray-300);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.22rem;
  cursor: pointer;
  background-color: #ffffff;
}

.site-header__toggle-bar {
  display: block;
  width: 1.2rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transform-origin: center;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

/* Open state animation */

.site-header__toggle--open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header__toggle--open .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle--open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Responsive layout */

@media (max-width: 960px) {
  .site-header__inner {
    gap: var(--space-3);
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    transform-origin: top;
    transform: scaleY(0.95);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
  }

  .site-header__nav-link {
    font-size: var(--font-size-base);
  }

  .site-header__nav--open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }

  .site-header__cta {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .site-header__site-tagline {
    display: none;
  }
}

/* Utility class to indicate active page (set server-side) */
.site-header__nav-item.is-active > .site-header__nav-link {
  color: var(--color-primary);
}

.site-header__nav-item.is-active > .site-header__nav-link::after {
  width: 100%;
}