:root{--page-max-width: 1400px;--control-panel-width: 360px;--header-height: 64px;--preview-min-height: 600px;--preview-margin: 48px;--preview-padding: 48px;--primary: #228b22;--primary-light: #3cb371;--primary-dark: #1b6b1b;--danger: #ef4444;--warning: #f59e0b;--success: #22c55e;--paper-white: #ffffff;--paper-line: #90c695;--radius: 12px;--radius-sm: 8px;--radius-xs: 4px;--shadow-sm: 0 1px 3px rgba(0,0,0,.1);--shadow-md: 0 4px 12px rgba(0,0,0,.1);--shadow-lg: 0 8px 24px rgba(0,0,0,.12);--text-primary: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af}@media(max-width:640px){:root{--control-panel-width: 100%;--preview-min-height: 400px;--preview-margin: 16px;--preview-padding: 16px}}@media(min-width:641px)and (max-width:1024px){:root{--control-panel-width: 260px;--preview-min-height: 400px;--preview-margin: 24px}}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:#f3f4f6;color:var(--text-primary);-webkit-font-smoothing:antialiased}@media print{body{background:#fff}.no-print{display:none!important}#paper-canvas{width:100%!important;height:auto!important}}