.pk-header {
  position: sticky;
  top: 0;
  z-index: 50;
  overflow: visible;
  background: linear-gradient(to bottom, rgba(9, 9, 11, 0.96), rgba(15, 23, 42, 0.96));
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

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

.pk-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.pk-brand-mark {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(212, 175, 55, 0.9);
  background: radial-gradient(circle at 30% 0, #fef9c3, #d4af37);
  box-shadow: 0 12px 40px rgba(212, 175, 55, 0.9);
}

.pk-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.pk-brand-name {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.pk-brand-tagline {
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.pk-nav {
  display: flex;
  align-items: center;
}

.pk-nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.pk-nav-item {
  position: relative;
}

.pk-nav-link {
  display: inline-flex;
  align-items: center;
  position: relative;
  padding-block: 0.35rem;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.pk-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(to right, #d4af37, #059669);
  transition: width var(--transition-base);
}

.pk-nav-link:hover,
.pk-nav-link:focus-visible {
  color: var(--color-text);
}

.pk-nav-link:hover::after,
.pk-nav-link:focus-visible::after {
  width: 100%;
}

.pk-nav-link-cta {
  padding-inline: 1rem;
  padding-block: 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(212, 175, 55, 0.8);
  background: linear-gradient(135deg, #059669, #16a34a);
  color: #ecfdf5;
  box-shadow: 0 0 0 1px rgba(5, 150, 105, 0.45), 0 14px 40px rgba(5, 150, 105, 0.55);
}

.pk-nav-link-cta::after {
  display: none;
}

.pk-nav-link-cta:hover,
.pk-nav-link-cta:focus-visible {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  box-shadow: 0 0 0 1px rgba(212, 175, 55, 0.7), 0 20px 60px rgba(34, 197, 94, 0.65);
  color: #fefce8;
}

.pk-nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(15, 23, 42, 0.95);
  gap: 5px;
  padding: 0;
  cursor: pointer;
}

.pk-nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  flex-shrink: 0;
  border-radius: 999px;
  background: #e5e7eb;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.pk-nav-toggle.is-open .pk-nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.pk-nav-toggle.is-open .pk-nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.pk-nav-toggle.is-open .pk-nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 960px) {
  .pk-nav-toggle {
    display: flex;
  }

  .pk-nav {
    position: absolute;
    left: 50%;
    right: auto;
    top: 100%;
    width: 100vw;
    max-width: 100vw;
    margin-left: -50vw;
    z-index: 40;
    pointer-events: none;
  }

  .pk-nav-list {
    position: relative;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: none;
    margin: 0;
    padding: var(--space-5) var(--space-6) var(--space-6);
    border-radius: 0;
    border: none;
    border-top: 1px solid rgba(212, 175, 55, 0.35);
    border-bottom: 1px solid rgba(30, 41, 59, 0.9);
    background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.98), rgba(2, 6, 23, 0.98));
    box-shadow: var(--shadow-lg);
    transform-origin: top center;
    transform: scaleY(0.98);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .pk-nav-list.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .pk-nav-link {
    width: 100%;
    padding-block: 0.75rem;
    white-space: normal;
  }

  .pk-nav-cta-wrap {
    width: 100%;
    margin-top: var(--space-2);
  }

  .pk-nav-link-cta {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .pk-header-inner {
    padding-inline: var(--space-4);
  }

  .pk-brand-name {
    font-size: var(--font-size-base);
    letter-spacing: 0.08em;
  }

  .pk-brand-tagline {
    display: none;
  }

  .pk-nav-list {
    padding-inline: var(--space-4);
  }
}