:root{--background:#fff;--surface:#f5f5f5;--text-primary:#202020;--text-secondary:#595959;--accent:#2457a7;--border:#ddd}*,:before,:after{box-sizing:border-box}body{background:var(--background);color:var(--text-primary);margin:0;font-family:system-ui,sans-serif;line-height:1.5}button,input,select,textarea{font:inherit}a{color:var(--accent);text-underline-offset:.2em}a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}img{max-width:100%;height:auto}#app{max-width:64rem;margin-inline:auto;padding:1.5rem}.site-header,main,.site-footer{padding-block:1rem}.site-footer{border-top:1px solid var(--border);color:var(--text-secondary)}.site-footer nav{flex-wrap:wrap;gap:1rem;display:flex}