*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  color: var(--va-text);
  background: var(--va-bg-page);
  line-height: 1.5;
}

a { color: var(--va-primary); text-decoration: none; transition: color var(--va-transition); }
a:hover { color: var(--va-primary-hover); }

h1, h2, h3, h4 { margin: 0 0 12px; font-weight: 600; color: var(--va-text); }

.va-hidden { display: none !important; }
.va-text-muted { color: var(--va-text-muted); }
.va-text-danger { color: var(--va-danger); }
.va-text-success { color: var(--va-success); }

.va-loading-mask {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: inherit;
}

.va-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--va-border);
  border-top-color: var(--va-primary);
  border-radius: 50%;
  animation: va-spin 0.6s linear infinite;
}

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

.va-empty {
  text-align: center;
  padding: 48px 16px;
  color: var(--va-text-muted);
}

.va-empty i { font-size: 48px; display: block; margin-bottom: 12px; opacity: 0.5; }