:root{--bg:#fff;--bg-subtle:#f6f7f8;--border:#e2e5e9;--text:#16181d;--text-muted:#62676f;--accent:#2451ff;--accent-text:#fff;--danger:#b3261e}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.5}a{color:inherit}button{font:inherit}@keyframes presence-pulse{0%,to{opacity:1}50%{opacity:.45}}.presence-ring-live{animation:2.5s ease-in-out infinite presence-pulse}