/* Unified VibeKey header lockup — homepage SPA + static pages */
.vk-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
  border-radius: 0.75rem;
  padding: 2px;
  -webkit-tap-highlight-color: transparent;
}
.vk-brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  display: block;
  border-radius: 10px;
  transition: transform 0.2s ease, filter 0.2s ease;
}
.vk-brand:hover .vk-brand-mark {
  transform: translateY(-1px) scale(1.04);
  filter: drop-shadow(0 4px 14px rgba(168, 85, 247, 0.55));
}
.vk-wordmark {
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1;
  letter-spacing: -0.022em;
  color: #fff;
  white-space: nowrap;
}
.vk-wordmark-key {
  background-image: linear-gradient(135deg, #2dd4bf, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  transition: background-image 0.2s ease;
}
.vk-brand:hover .vk-wordmark-key {
  background-image: linear-gradient(135deg, #5eead4, #c084fc);
}
.vk-brand:focus-visible {
  outline: 2px solid #2dd4bf;
  outline-offset: 2px;
}
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .vk-wordmark-key {
    -webkit-text-fill-color: #5eead4;
    color: #5eead4;
  }
}
@media (forced-colors: active) {
  .vk-wordmark-key {
    -webkit-text-fill-color: currentColor;
    color: currentColor;
    background-image: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .vk-brand-mark,
  .vk-brand:hover .vk-brand-mark,
  .vk-wordmark-key {
    transition: none;
  }
  .vk-brand:hover .vk-brand-mark {
    transform: none;
  }
}
@media (max-width: 480px) {
  .vk-brand {
    gap: 0.5rem;
  }
  .vk-brand-mark {
    width: 30px;
    height: 30px;
    border-radius: 9px;
  }
  .vk-wordmark {
    font-size: 1rem;
  }
}
.site-header .vk-brand,
.site-header a.vk-brand:hover {
  color: inherit;
}
.site-header .nav {
  font-weight: 500;
}
.site-header .nav a {
  padding: 6px 10px;
  border-radius: 8px;
  transition: color 0.18s ease, background 0.18s ease;
}
.site-header .nav a:hover {
  color: var(--text, #f9fafb);
  background: rgba(255, 255, 255, 0.06);
}
.site-header .nav a[aria-current="page"] {
  color: var(--text, #f9fafb);
  position: relative;
}
.site-header .nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #2dd4bf, #a855f7);
}

/* Circular chat / assist avatars */
.vk-avatar-mark {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  padding: 18%;
  background: #0a0a0f;
  box-sizing: border-box;
}