/* Header styles for KoplomGamePL */

.kg-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(5, 6, 8, 0.96), rgba(5, 6, 8, 0.88));
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.kg-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-4);
}

/* Brand */

.kg-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--fs-sm);
  color: var(--color-text);
}

.kg-header__logo::after {
  display: none;
}

.kg-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.17), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(27, 179, 166, 0.35), transparent 60%),
    radial-gradient(circle at 50% 50%, rgba(225, 27, 47, 0.9), rgba(5, 6, 8, 1));
  box-shadow: 0 0 18px rgba(225, 27, 47, 0.7);
  position: relative;
}

.kg-header__logo-mark::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 2px solid rgba(8, 231, 11, 0.75);
  box-shadow: 0 0 18px rgba(142, 231, 11, 0.7);
}

.kg-header__logo-text {
  font-weight: 600;
}

/* Navigation */

.kg-header__nav {
  display: flex;
  align-items: center;
}

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

.kg-header__nav-link {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  padding-block: 0.25rem;
  position: relative;
}

.kg-header__nav-link::after {
  height: 2px;
  bottom: -0.3rem;
}

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

.kg-header__nav-link[aria-current="page"] {
  color: var(--color-primary);
}

.kg-header__nav-link[aria-current="page"]::after {
  width: 100%;
}

/* Mobile toggle */

.kg-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(15, 17, 21, 0.95);
  color: var(--color-text);
}

.kg-header__toggle:focus-visible {
  outline: 2px solid var(--color-accent-green);
  outline-offset: 3px;
}

.kg-header__toggle-icon {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.kg-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Open state */

.kg-header__toggle[aria-expanded="true"] .kg-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.kg-header__toggle[aria-expanded="true"] .kg-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.kg-header__toggle[aria-expanded="true"] .kg-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Responsive behavior */

@media (max-width: 768px) {
  .kg-header__toggle {
    display: inline-flex;
  }

  .kg-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at top, rgba(225, 27, 47, 0.2), transparent 55%), var(--color-bg-elevated);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

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

  .kg-header__nav-link {
    padding-block: 0.5rem;
  }

  .kg-header__nav--open {
    opacity: 1;
    transform: scaleY(1);
    visibility: visible;
    pointer-events: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kg-header__nav {
    transition: none;
  }
}