:root{--background:#fff;--foreground:#1f2328;--color-canvas-bg:#e9ebef;--color-panel-bg:#fbfbfc;--color-rail-bg:#f5f6f8;--color-border:#e3e5e9;--color-border-strong:#cfd3da;--color-text:#1f2328;--color-text-muted:#6b7280;--color-text-subtle:#9aa1ab;--color-hover:#0f172a0f;--color-input-bg:#fff;--color-accent:#1f6feb;--color-accent-hover:#1a5fd0;--color-accent-contrast:#fff;--color-accent-soft:#1f6feb1f;--color-danger:#d1242f;--color-surface:#fff;--color-guide:#ff2d87;--color-tooltip-bg:#1f2328;--color-tooltip-text:#fff;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--radius-sm:6px;--radius-md:10px;--shadow-sm:0 1px 2px #0f172a0f;--shadow-md:0 6px 20px #0f172a1f;--shadow-lg:0 16px 48px #0f172a33;--checkerboard:repeating-conic-gradient(#e6e8ec 0% 25%, #fff 0% 50%) 50% / 12px 12px}html,body{margin:0;padding:0}*{box-sizing:border-box}body{color:var(--foreground);background:var(--background);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Segoe UI,Arial,sans-serif}button,input,select,textarea{font-family:inherit}