/* Header styles for BookHaven */

.bh-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(253, 251, 247, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.bh-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-4);
}

/* Branding */
.bh-header__branding {
  display: flex;
  align-items: center;
}

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

.bh-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 20% 0, #fdfbf7 0, #7f2532 40%, #1b2a4a 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

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

.bh-header__site-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.bh-header__tagline {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
}

/* Navigation */
.bh-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

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

.bh-header__nav-link {
  font-size: var(--font-size-sm);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
  padding-block: 0.25rem;
}

.bh-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transition: width var(--transition-normal);
}

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

.bh-header__nav-link:hover,
.bh-header__nav-link:focus-visible {
  color: var(--color-primary);
  text-decoration: none;
}

.bh-header__cta-group {
  margin-left: var(--space-4);
}

/* Mobile toggle */
.bh-header__nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(27, 42, 74, 0.12);
  background-color: rgba(253, 251, 247, 0.9);
  color: var(--color-text);
}

.bh-header__nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.bh-header__nav-toggle-line {
  width: 16px;
  height: 1.5px;
  border-radius: 999px;
  background-color: #fff;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.bh-header__nav-toggle-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color:#fff;
}

/* Toggle active state */
.bh-header__nav-toggle[aria-expanded="true"] .bh-header__nav-toggle-line:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.bh-header__nav-toggle[aria-expanded="true"] .bh-header__nav-toggle-line:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

/* Responsive layout */
@media (max-width: 880px) {
  .bh-header__inner {
    align-items: center;
  }

  .bh-header__nav-toggle {
    display: inline-flex;
  }

  .bh-header__nav {
    position: fixed;
    inset-inline: 0;
    top: auto;
    bottom: 0;
    transform: translateY(100%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-fast);
    background: rgba(253, 251, 247, 0.98);
    box-shadow: 0 -16px 30px rgba(15, 23, 42, 0.16);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6) var(--space-4) max(env(safe-area-inset-bottom), var(--space-6));
  }

  .bh-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

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

  .bh-header__cta-group {
    margin-left: 0;
    margin-top: var(--space-4);
  }

  .bh-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    height: 300px;
        top: 70px;
  }
}

@media (max-width: 520px) {
  .bh-header__tagline {
    display: none;
  }

  .bh-header__site-name {
    font-size: 1.1rem;
  }
}

/* Assistive utility when menu is open */
.bh-header--menu-open {
  overflow: hidden;
}