:root{--color-background: #ffffff;--color-background-page: #f5f5f5;--color-accent: #DC2626;--color-text-primary: #1a1a1a;--color-text-muted: #666666;--color-border: #e0e0e0;--font-family: "IBM Plex Sans Thai", -apple-system, BlinkMacSystemFont, sans-serif;--spacing-xs: 8px;--spacing-sm: 16px;--spacing-md: 24px;--spacing-lg: 32px;--spacing-xl: 48px;--canvas-internal: 1080px;--canvas-preview: 540px;--canvas-export: 2048px;--content-max-width: 1400px;--breakpoint-desktop: 1024px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);background:var(--color-background-page);color:var(--color-text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}