:root {
  --mmpdf-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mmpdf-bg: #f6f8fb;
  --mmpdf-surface: #ffffff;
  --mmpdf-surface-muted: #f1f5f9;
  --mmpdf-border: #dbe3ef;
  --mmpdf-text: #111827;
  --mmpdf-text-muted: #64748b;
  --mmpdf-primary: #0f766e;
  --mmpdf-primary-strong: #115e59;
  --mmpdf-primary-soft: #ccfbf1;
  --mmpdf-accent: #2563eb;
  --mmpdf-success: #059669;
  --mmpdf-warning: #d97706;
  --mmpdf-danger: #dc2626;
  --mmpdf-disabled: #94a3b8;
  --mmpdf-radius-sm: 8px;
  --mmpdf-radius-md: 12px;
  --mmpdf-radius-lg: 16px;
  --mmpdf-radius-xl: 24px;
  --mmpdf-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --mmpdf-shadow-md: 0 16px 40px rgba(15, 23, 42, 0.12);
  --mmpdf-safe-bottom: env(safe-area-inset-bottom, 0px);
}

html {
  font-family: var(--mmpdf-font-sans);
}

.mmpdf-btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--mmpdf-radius-md);
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
}

.mmpdf-btn:active {
  transform: translateY(1px);
}

.mmpdf-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.mmpdf-btn-primary {
  background: var(--mmpdf-primary);
  color: #ffffff;
}

.mmpdf-btn-primary:hover {
  background: var(--mmpdf-primary-strong);
}

.mmpdf-btn-secondary {
  background: var(--mmpdf-surface-muted);
  color: var(--mmpdf-text);
}

.mmpdf-btn-danger {
  background: #fee2e2;
  color: #991b1b;
}

.mmpdf-card {
  border: 1px solid var(--mmpdf-border);
  border-radius: var(--mmpdf-radius-lg);
  background: var(--mmpdf-surface);
  box-shadow: var(--mmpdf-shadow-sm);
}

.mmpdf-field {
  min-height: 44px;
  width: 100%;
  border: 1px solid var(--mmpdf-border);
  border-radius: var(--mmpdf-radius-md);
  background: var(--mmpdf-surface);
  color: var(--mmpdf-text);
  padding: 10px 12px;
  font-size: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --mmpdf-bg: #0f172a;
    --mmpdf-surface: #111827;
    --mmpdf-surface-muted: #1e293b;
    --mmpdf-border: #334155;
    --mmpdf-text: #f8fafc;
    --mmpdf-text-muted: #cbd5e1;
  }
}