.theme-dark {
  --ui-bg: #0e141c;
  --ui-surface: #172331;
  --ui-border: #2f455d;
  --ui-text: #d8e2f0;
  --ui-accent: #5fd6ff;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 2000;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(10, 12, 16, 0.92);
  border-bottom: 1px solid rgba(112, 130, 160, 0.25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.site-nav a {
  color: #d8e2f0;
  text-decoration: none;
  font-size: 12px;
  line-height: 1;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(125, 149, 183, 0.35);
  background: rgba(25, 33, 46, 0.7);
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.12s ease;
}

.site-nav a:hover {
  background: rgba(35, 48, 66, 0.86);
  border-color: rgba(160, 187, 225, 0.55);
}

.site-nav a:active {
  transform: translateY(1px);
}

.site-nav a:focus-visible {
  outline: 2px solid rgba(95, 214, 255, 0.95);
  outline-offset: 2px;
}

.site-nav a.active {
  color: #ffffff;
  border-color: rgba(95, 214, 255, 0.8);
  box-shadow: 0 0 0 1px rgba(95, 214, 255, 0.35) inset;
}

.page-container {
  width: min(1100px, 100%);
  margin: 0 auto;
  box-sizing: border-box;
}

.ui-card {
  border-radius: 14px;
  padding: 14px;
}

.ui-btn {
  min-height: 44px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.12s ease, filter 0.16s ease, border-color 0.16s ease;
}

.ui-btn:hover {
  filter: brightness(1.06);
}

.ui-btn:active {
  transform: translateY(1px);
}

.ui-btn:focus-visible {
  outline: 2px solid rgba(95, 214, 255, 0.95);
  outline-offset: 2px;
}

.ui-btn-primary {
  background: #4bc3ff;
  color: #07111c;
}

.ui-btn-secondary {
  background: transparent;
  color: #b9e9ff;
  border-color: rgba(115, 196, 232, 0.55);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 640px) {
  .site-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: thin;
    padding-bottom: 12px;
  }

  .site-nav a {
    white-space: nowrap;
  }
}