:root{color-scheme:light;--background:#f7f8fa;--foreground:#17202a;--muted:#5b6470;--panel:#ffffff;--border:#d9dee7;--accent:#0f766e}*{box-sizing:border-box}body,html{min-height:100%}body{margin:0;background:var(--background);color:var(--foreground);font-family:Arial,Helvetica,sans-serif}.app-shell{display:grid;min-height:100vh;place-items:center;padding:24px}.welcome-panel{width:min(100%,560px);border:1px solid var(--border);border-radius:8px;background:var(--panel);padding:32px}.eyebrow{margin:0 0 8px;color:var(--accent);font-size:.875rem;font-weight:700;text-transform:uppercase}h1{margin:0;font-size:2.5rem;line-height:1.1}.lede{margin:16px 0 0;color:var(--muted);font-size:1rem;line-height:1.6}