html,
body {
  min-height: 100%;
}

body {
  position: relative;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    linear-gradient(180deg, #f7f8fa 0%, #f3f5f8 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

small {
  display: block;
  color: var(--text-muted);
  line-height: 1.6;
}

.page-decor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(16, 24, 40, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 24, 40, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(180deg, rgba(255,255,255,0.35), transparent);
  opacity: 0.4;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease,
    color 0.2s ease;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
}

.btn--primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
}

.btn--primary:hover {
  background: var(--primary-2);
  border-color: var(--primary-2);
  transform: translateY(-1px);
}

.btn--primary:disabled {
  opacity: 0.72;
  cursor: not-allowed;
  transform: none;
}

.btn--ghost {
  background: #ffffff;
  color: var(--text);
  border-color: var(--border);
}

.btn--ghost:hover {
  background: #f9fafb;
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.btn--sm {
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}