:root{--bg: #f5f6f8;--surface: #ffffff;--text-primary: #1b1c1e;--text-secondary:#585a60;--accent-blue: #1a73e8;--accent-amber: #e8932c;--accent-green: #2a9d46;--border: #e0e2e6;--radius: 8px;--shadow: 0 4px 24px rgba(0, 0, 0, .06);--font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--grid-size: 24px;--grid-color: rgba(0, 0, 0, .03)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);font-family:var(--font-sans);color:var(--text-primary);line-height:1.5;background-image:radial-gradient(circle,var(--grid-color) 1px,transparent 1px);background-size:var(--grid-size) var(--grid-size);padding:1.5rem}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}