/* Header styles for Konyvoazis */

.kv-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: radial-gradient(circle at 0 0, rgba(210, 166, 97, 0.22), transparent 55%),
              linear-gradient(to bottom, rgba(5, 5, 9, 0.96), rgba(5, 5, 9, 0.92));
  border-bottom: 1px solid rgba(210, 166, 97, 0.32);
}

.kv-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);
}

/* Brand */

.kv-header__brand {
  display: flex;
  align-items: center;
}

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

.kv-header__logo-mark {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 0, #f3c975, #d2a661 50%, #8c5a32 100%);
  box-shadow: 0 0 0 2px rgba(12, 13, 16, 0.85), var(--shadow-soft-gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.kv-header__logo-chip {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid rgba(12, 13, 16, 0.8);
  box-shadow: inset 0 0 0 1px rgba(247, 243, 232, 0.9);
  background: radial-gradient(circle at 30% 0, #f7f3e8, #d2a661 70%, #b55d4c 100%);
}

.kv-header__logo-text {
  display: flex;
  flex-direction: column;
}

.kv-header__logo-title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.kv-header__logo-tagline {
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

/* Navigation */

.kv-header__nav {
  margin-left: auto;
}

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

.kv-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0.35rem 0;
}

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

.kv-header__nav-link:hover,
.kv-header__nav-link:focus-visible {
  color: var(--color-primary-strong);
}

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

.kv-header__nav-item--cta .kv-header__nav-link--cta {
  padding: 0.55rem 1.35rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(210, 166, 97, 0.68);
  background: radial-gradient(circle at 10% 0, rgba(243, 201, 117, 0.24), rgba(210, 166, 97, 0.06));
  box-shadow: var(--shadow-soft-gold);
}

.kv-header__nav-item--cta .kv-header__nav-link--cta::after {
  display: none;
}

.kv-header__nav-item--cta .kv-header__nav-link--cta:hover,
.kv-header__nav-item--cta .kv-header__nav-link--cta:focus-visible {
  background: radial-gradient(circle at 10% 0, rgba(243, 201, 117, 0.42), rgba(210, 166, 97, 0.18));
  color: #120f0c;
}

/* Mobile toggle */

.kv-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(210, 166, 97, 0.6);
  color: var(--color-primary-strong);
  background: rgba(6, 5, 10, 0.9);
  cursor: pointer;
}

.kv-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary-strong);
  outline-offset: 2px;
}

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

.kv-header__toggle-bars span {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-primary-strong);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.kv-header__toggle-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* Toggle active state */

.kv-header__toggle[aria-expanded="true"] .kv-header__toggle-bars span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.kv-header__toggle[aria-expanded="true"] .kv-header__toggle-bars span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* Responsive behavior */

@media (max-width: 900px) {
  .kv-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

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

  .kv-header__nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 56px;
    background: radial-gradient(circle at 0 0, rgba(210, 166, 97, 0.3), transparent 55%),
                rgba(5, 5, 9, 0.98);
    border-bottom: 1px solid rgba(210, 166, 97, 0.32);
    transform-origin: top;
    transform: scaleY(0.95);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .kv-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-5);
    gap: var(--space-3);
  }

  .kv-header__nav-link {
    font-size: var(--font-size-md);
    padding: 0.35rem 0;
  }

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

  .kv-header__nav--open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }
}

@media (max-width: 600px) {
  .kv-header__logo-title {
    font-size: var(--font-size-lg);
  }

  .kv-header__logo-tagline {
    display: none;
  }
}