/* Header styles for BOP'S CONSULTANCY LIMITED */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  backdrop-filter: blur(12px);
  background: linear-gradient(to bottom, rgba(248, 250, 252, 0.95), rgba(248, 250, 252, 0.85));
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

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

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

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
  text-decoration: none;
}

.site-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at 20% 0%, #e3ecf8 0, #1f4f8c 40%, #153463 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.site-header__logo-initials {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ffffff;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.site-header__brand-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__brand-tagline {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Navigation */
.site-header__nav {
  display: flex;
}

.site-header__nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--color-primary-strong);
  background-color: var(--color-primary-soft);
}

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

.site-header__nav-link--highlight {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.site-header__nav-link--highlight:hover {
  background-color: var(--color-primary-strong);
  color: #ffffff;
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background-color: #ffffff;
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
}

.site-header__toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.site-header__toggle-line {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.site-header__toggle-text {
  display: inline-block;
}

/* Mobile layout */
@media (max-width: 768px) {
  .site-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .site-header__brand-name {
    font-size: 0.9rem;
  }

  .site-header__brand-tagline {
    display: none;
  }

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

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: rgba(248, 250, 252, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.35);
    transform-origin: top;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-2) var(--space-4) var(--space-4);
    gap: var(--space-1);
  }

  .site-header__nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0.55rem 0.85rem;
    border-radius: var(--radius-md);
  }

  .site-header__nav-link--highlight {
    justify-content: center;
    margin-top: var(--space-2);
  }

  .site-header--menu-open .site-header__nav {
    max-height: 320px;
    opacity: 1;
    visibility: visible;
  }

  .site-header--menu-open .site-header__toggle-line:first-child {
    transform: translateY(3px) rotate(45deg);
  }

  .site-header--menu-open .site-header__toggle-line:last-child {
    transform: translateY(-3px) rotate(-45deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-header * {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}