:root {
  --header-bg: linear-gradient(to right, #0f172a, #1e293b);
  --header-glass: rgba(15, 23, 42, 0.8);
  --header-border: rgba(255,255,255,0.08);
  --header-text: #f1f5f9;
  --header-hover: #38bdf8;
  --_sentinel-css-loaded: loaded;
}

body.dark-mode {
  background-color: #0b1220;
  color: var(--header-text);
}

.main-header-container {
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--header-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-logo-text {
  font-weight: 700;
  color: var(--header-text);
}

.primary-menu {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.primary-menu a {
  color: var(--header-text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
  text-decoration: none;
  transition: color 0.2s ease;
}
.primary-menu a:hover {
  color: var(--header-hover);
}

@media (min-width: 768px) and (max-width: 1024px) {
  .primary-menu a {
    font-size: 0.85rem;
    padding: 0.25rem;
  }
}

#mobile-menu {
  background: var(--header-glass);
  border-top: 1px solid var(--header-border);
  border-bottom: 1px solid var(--header-border);
  border-radius: 0 0 0.75rem 0.75rem;
}
#mobile-menu .menu {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0.75rem 0;
}
#mobile-menu .menu a {
  color: var(--header-text);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-size: 0.95rem;
}
#mobile-menu .menu a:hover {
  background: rgba(56, 189, 248, 0.1);
  color: var(--header-hover);
}

#mobile-menu-button:focus-visible {
  outline: 2px solid var(--header-hover);
  outline-offset: 2px;
}