#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent) !important;
  letter-spacing: -0.5px;
}

#nav {
  display: flex;
  gap: var(--spacing-md);
}

#nav a {
  color: var(--color-text-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

#nav a:hover,
#nav a.active {
  color: var(--color-text);
  background: var(--color-bg-secondary);
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--color-text);
  padding: var(--spacing-xs);
}

@media (max-width: 600px) {
  .menu-toggle {
    display: block;
  }

  #nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    display: none;
  }

  #nav.open {
    display: flex;
  }

  #nav a {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .no-auth {
    display: none;
  }

  .auth-only {
    display: block;
  }
}

.page {
  padding: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
}

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.grid-masonry {
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  grid-auto-rows: 10px;
}

.flex {
  display: flex;
}

.flex-center {
  align-items: center;
  justify-content: center;
}

.flex-between {
  align-items: center;
  justify-content: space-between;
}

.flex-gap-sm {
  gap: var(--spacing-sm);
}

.flex-gap-md {
  gap: var(--spacing-md);
}

.text-center {
  text-align: center;
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-mono {
  font-family: var(--font-mono);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--color-text-secondary);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}