.bpl-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(12, 14, 18, 0.9), rgba(12, 14, 18, 0.8));
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

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

.bpl-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.bpl-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 40% 60% 45% 55%;
  background: radial-gradient(circle at 30% 20%, rgba(245, 194, 107, 0.95), rgba(245, 194, 107, 0.1) 45%, rgba(0, 0, 0, 0.9));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04), var(--shadow-sm);
}

.bpl-header__title-group {
  display: flex;
  flex-direction: column;
}

.bpl-header__site-title {
  font-family: "Playfair Display", var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.bpl-header__site-tagline {
  font-size: var(--font-size-xs);
  color: var(--gray-300);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.bpl-header__nav {
  margin-left: var(--space-6);
}

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

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

.bpl-header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0;
  font-size: var(--font-size-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-200);
}

.bpl-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), rgba(245, 194, 107, 0.15));
  transition: width var(--transition-base);
}

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

.bpl-header__nav-item--accent .bpl-header__nav-link--button {
  position: relative;
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(245, 194, 107, 0.4);
  background: radial-gradient(circle at 30% 0, rgba(245, 194, 107, 0.25), rgba(15, 17, 21, 0.9));
  color: #121317;
  color: var(--color-text);
}

.bpl-header__nav-item--accent .bpl-header__nav-link--button::after {
  display: none;
}

.bpl-header__nav-item--accent .bpl-header__nav-link--button:hover {
  background: radial-gradient(circle at 20% -10%, rgba(255, 221, 160, 0.6), rgba(15, 17, 21, 1));
  border-color: rgba(255, 221, 160, 0.8);
}

.bpl-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background-color: rgba(12, 14, 18, 0.8);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.bpl-header__toggle-bar {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-100);
  transition: transform var(--transition-base), opacity var(--transition-fast), top var(--transition-base), bottom var(--transition-base);
}

.bpl-header__toggle-bar:first-child {
  top: 14px;
}

.bpl-header__toggle-bar:last-child {
  bottom: 14px;
}

.bpl-header__toggle[aria-expanded="true"] .bpl-header__toggle-bar:first-child {
  top: 19px;
  transform: rotate(45deg);
}

.bpl-header__toggle[aria-expanded="true"] .bpl-header__toggle-bar:last-child {
  bottom: 19px;
  transform: rotate(-45deg);
}

@media (max-width: 768px) {
  .bpl-header__inner {
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .bpl-header__site-tagline {
    display: none;
  }

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

  .bpl-header__nav {
    position: fixed;
    inset: 0;
    top: 60px;
    background: radial-gradient(circle at top left, rgba(245, 194, 107, 0.08), transparent 55%), var(--color-bg-alt);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-fast);
  }

  .bpl-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-6) var(--space-4) var(--space-8);
    background-color: #121317;
    left: 0;
  }

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

  .bpl-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bpl-header__nav,
  .bpl-header__toggle-bar {
    transition: none !important;
  }
}