/* Header styles for Pipe Flow Service */

.pfs-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.pfs-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-12);
}

.pfs-header__brand {
  display: flex;
  align-items: center;
}

.pfs-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  text-decoration: none;
}

.pfs-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.pfs-header__logo-mark .fa-faucet-drip {
  font-size: 1.1rem;
}

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

.pfs-header__brand-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gray-900);
}

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

/* Navigation */

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

.pfs-header__nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

.pfs-header__nav-item {
  position: relative;
}

.pfs-header__nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  padding: 0.35rem 0.25rem;
  text-decoration: none;
}

.pfs-header__nav-link:hover,
.pfs-header__nav-link:focus-visible {
  color: var(--color-primary);
}

.pfs-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.2rem;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.pfs-header__nav-link:hover::after,
.pfs-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.pfs-header__nav-item--cta {
  margin-left: var(--space-8);
}

.pfs-header__cta {
  font-size: var(--font-size-sm);
  padding-inline: 1.25rem;
}

/* Mobile toggle */

.pfs-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gray-200);
  background-color: var(--color-surface);
  cursor: pointer;
}

.pfs-header__toggle-icon,
.pfs-header__toggle-icon::before,
.pfs-header__toggle-icon::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  position: relative;
  transition: transform var(--transition-normal), opacity var(--transition-normal), top var(--transition-normal), bottom var(--transition-normal);
}

.pfs-header__toggle-icon::before,
.pfs-header__toggle-icon::after {
  content: "";
  position: absolute;
}

.pfs-header__toggle-icon::before {
  top: -6px;
}

.pfs-header__toggle-icon::after {
  bottom: -6px;
}

.pfs-header__toggle[aria-expanded="true"] .pfs-header__toggle-icon {
  transform: rotate(45deg);
}

.pfs-header__toggle[aria-expanded="true"] .pfs-header__toggle-icon::before {
  top: 0;
  transform: rotate(-90deg);
}

.pfs-header__toggle[aria-expanded="true"] .pfs-header__toggle-icon::after {
  bottom: 0;
  opacity: 0;
}

/* Responsive behaviour */

@media (max-width: 768px) {
  .pfs-header__toggle {
    display: inline-flex;
  }

  .pfs-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-md);
    transform-origin: top;
  }

  .pfs-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-16);
    gap: var(--space-12);
  }

  .pfs-header__nav-item--cta {
    width: 100%;
  }

  .pfs-header__cta {
    width: 100%;
    justify-content: center;
  }

  /* JS will toggle the class .pfs-header__nav--open; default is visible for no-JS support */
  .pfs-header__nav {
    display: block;
  }

  .pfs-header--js-enabled .pfs-header__nav {
    display: none;
  }

  .pfs-header--js-enabled .pfs-header__nav.pfs-header__nav--open {
    display: block;
  }
}

@media (min-width: 769px) {
  .pfs-header__nav {
    position: static;
    box-shadow: none;
  }

  .pfs-header__nav-list {
    flex-direction: row;
  }
}