/* Header – VOID Agency */

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  height: var(--header-height);
  transition: border-color var(--transition-base);
}

.header.is-scrolled {
  border-bottom-color: var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: var(--header-height);
}

.header__logo {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.03em;
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.header__logo:hover { color: var(--color-accent); }

.logo-dot { color: var(--color-accent); }

.header__nav { display: none; }

@media (min-width: 900px) { .header__nav { display: flex; } }

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav__link:hover, .nav__link.is-active {
  color: var(--color-accent);
  background-color: var(--color-accent-dim);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

@media (max-width: 599px) { .header__actions .btn:not(.mobile-menu-btn) { display: none; } }

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover { background-color: var(--color-surface-2); }

@media (min-width: 900px) { .mobile-menu-btn { display: none; } }

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 22px;
}

.hamburger span {
  display: block;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.mobile-menu-btn[aria-expanded="true"] .hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn[aria-expanded="true"] .hamburger span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.mobile-menu-btn[aria-expanded="true"] .hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
}

.mobile-menu[aria-hidden="false"] { max-height: 500px; }

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  padding: var(--space-4) var(--container-padding);
  gap: var(--space-1);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-menu__link:hover { background-color: var(--color-accent-dim); color: var(--color-accent); }
.mobile-menu__cta { display: block; margin: 0 var(--container-padding) var(--space-6); text-align: center; }