/* Header layout */
.bv-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(247, 247, 247, 0.96), rgba(247, 247, 247, 0.88));
  border-bottom: 1px solid var(--gray-200);
}

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

/* Brand */
.bv-header__brand {
  display: flex;
  align-items: center;
}

.bv-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
}

.bv-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 20% 20%, #ffffff 0%, #f5f5f5 35%, #e1e1e1 100%);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.bv-header__logo-mark::before {
  content: "B";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.bv-header__logo-text {
  font-family: var(--font-heading);
}

/* Nav */
.bv-header__nav {
  display: flex;
}

.bv-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.bv-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0;
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

.bv-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-wood), var(--color-primary));
  transition: width var(--transition-base);
}

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

.bv-header__nav-item--cta .bv-header__nav-link--cta {
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--gray-300);
  background-color: #ffffff;
  box-shadow: var(--shadow-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: var(--font-size-xs);
}

.bv-header__nav-item--cta .bv-header__nav-link--cta:hover {
  background-color: var(--gray-100);
  box-shadow: var(--shadow-sm);
}

/* Mobile toggle */
.bv-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--gray-300);
  background-color: #ffffff;
  cursor: pointer;
}

.bv-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-primary);
  margin-left: auto;
  margin-right: auto;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Mobile nav default: visible without JS, but visually optimized with JS */
@media (max-width: 767px) {
  .bv-header__nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    background: rgba(247, 247, 247, 0.98);
    border-bottom: 1px solid var(--gray-200);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .bv-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-3);
  }

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

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

  .bv-header__nav-item--cta {
    width: 100%;
    margin-top: var(--space-2);
  }

  .bv-header__nav-item--cta .bv-header__nav-link--cta {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .bv-header__toggle--active .bv-header__toggle-bar:nth-child(1) {
    transform: translateY(3px) rotate(45deg);
  }

  .bv-header__toggle--active .bv-header__toggle-bar:nth-child(2) {
    transform: translateY(-3px) rotate(-45deg);
  }
}

@media (min-width: 768px) {
  .bv-header__toggle {
    display: none;
  }
}

/* Focus states */
.bv-header__toggle:focus-visible,
.bv-header__logo-link:focus-visible,
.bv-header__nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}