:root{--tb-radius: 12px;--tb-space-xs: 6px;--tb-space-sm: 12px;--tb-space-md: 20px;--tb-space-lg: 32px;--color-bg: #FFFFFF;--color-surface-1: #FFFFFF;--color-surface-2: #F8FAFB;--color-muted-surface: rgba(0,0,0,.01);--color-primary: #2563EB;--color-primary-700: #1D4ED8;--color-secondary: #E5E7EB;--color-accent: #3B82F6;--text-primary: #1F2937;--text-secondary: #6B7280;--text-muted: #9CA3AF;--color-success: #10B981;--color-warning: #F59E0B;--color-danger: #EF4444;--shadow-1: 0 6px 18px rgba(0,0,0,.08);--shadow-2: 0 2px 8px rgba(0,0,0,.04);--bg: var(--color-bg);--surface: var(--color-surface-1);--surface-alt: var(--color-surface-2);--accent: var(--color-primary);--accent-hover: var(--color-primary-700);--border: rgba(0,0,0,.08);--text: var(--text-primary);--text-muted: var(--text-secondary);--success: var(--color-success);--danger: var(--color-danger);--radius: var(--tb-radius)}html,body{background:var(--bg);margin:0;color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}*{box-sizing:border-box}