/* Header styles for PIPS & BRICKS LTD */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 10, 18, 0.96), rgba(5, 10, 18, 0.9));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-50);
}

.site-header__logo-mark {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: radial-gradient(circle at 30% 0%, #1f4c8f, #111827);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

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

.site-header__brand-name {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__brand-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;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--gray-100);
  padding: 0.25rem 0;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #1f4c8f, #3fa794);
  transition: width var(--transition-normal);
}

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

.site-header__nav-link--cta {
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(135deg, #1f4c8f, #20375a);
  color: #ffffff;
  box-shadow: var(--shadow-xs);
}

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

.site-header__nav-link--cta:hover {
  background: linear-gradient(135deg, #275da8, #20375a);
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  position: relative;
  width: 42px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.16);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--gray-50);
  background: radial-gradient(circle at 10% 0%, rgba(39, 93, 168, 0.35), rgba(8, 14, 24, 0.98));
}

.site-header__toggle-bar {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 99px;
  background-color: var(--gray-100);
  transition: transform var(--transition-normal), opacity var(--transition-normal), top var(--transition-normal), bottom var(--transition-normal);
}

.site-header__toggle-bar:first-child {
  top: 13px;
}

.site-header__toggle-bar:last-child {
  bottom: 13px;
}

/* Open state */
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:first-child {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:last-child {
  bottom: auto;
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
}

/* Responsive behaviour */
@media (max-width: 960px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: radial-gradient(circle at top left, rgba(39, 93, 168, 0.45), rgba(8, 14, 24, 0.98));
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4);
  }

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

  .site-header__nav-link--cta {
    width: 100%;
    justify-content: center;
  }

  .site-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 600px) {
  .site-header__brand-tagline {
    display: none;
  }
}

/* Utility to lock scroll when mobile nav is open */
body.menu-open {
  overflow: hidden;
}