/* layout.css */
.global-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-primary-900);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent-300);
}

.nav-brand h1 {
  margin-bottom: 0;
  font-size: var(--text-lg);
}

.nav-brand .material-symbols-rounded {
  font-size: 28px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.xp-display {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: var(--font-weight-bold);
  color: var(--color-star);
}

.btn-icon {
  color: var(--text-regular);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast) var(--ease-in-out);
}

.btn-icon:hover {
  transform: scale(1.1);
  color: var(--color-accent-400);
}

.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-6);
  min-height: calc(100vh - 70px); /* fallback height */
  display: flex;
  flex-direction: column;
}

.loading-spinner {
  margin: auto;
  font-size: var(--text-xl);
  color: var(--color-accent-300);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* 响应式 */
@media screen and (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .main-content { margin-left: 0; }
}

@media screen and (max-width: 768px) {
  :root {
    --space-6: 16px;
    --space-8: 20px;
    --text-base: 16px;
    --text-2xl: 24px;
  }
  
  .app-container {
    padding: var(--space-4);
  }
}