/* ===== Reset & Base Styles ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  padding-bottom: 72px;
}

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: calc(80px + env(safe-area-inset-bottom, 16px));
}

.page {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px calc(16px + env(safe-area-inset-bottom, 16px));
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* 加载 */
.loading-spinner {
  width: 44px; height: 44px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 骨架屏 */
.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, var(--divider) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.2s ease-in-out infinite;
  border-radius: 8px;
}
@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-card {
  height: 120px;
  margin-bottom: 12px;
  border-radius: var(--radius);
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 14px;
}
.empty-state-icon {
  font-size: 40px;
  margin-bottom: 10px;
  opacity: 0.5;
}

/* ===== Gradient Mesh Background ===== */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 600px 400px at 10% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 500px 500px at 80% 60%, rgba(129, 140, 248, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 400px 300px at 50% 90%, rgba(79, 70, 229, 0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: meshFloat 20s ease-in-out infinite;
}
@media (prefers-color-scheme: dark) {
  body::before {
    background:
      radial-gradient(ellipse 600px 400px at 10% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 70%),
      radial-gradient(ellipse 500px 500px at 80% 60%, rgba(129, 140, 248, 0.08) 0%, transparent 70%),
      radial-gradient(ellipse 400px 300px at 50% 90%, rgba(79, 70, 229, 0.06) 0%, transparent 70%);
  }
}
@keyframes meshFloat {
  0%, 100% { opacity: 1; }
  33% { opacity: 0.7; }
  66% { opacity: 0.9; }
}
body > * { position: relative; z-index: 1; }

/* ===== Page Tab Transitions ===== */
@keyframes tabFadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}