:root{color-scheme:light dark;font-family:system-ui,sans-serif}body{margin:0;padding:2rem;background:#0f172a;color:#e2e8f0}.panel{max-width:720px;margin:4rem auto;background:#1e293b;padding:2rem;border-radius:12px}h1{margin-top:0;font-size:1.5rem}code,pre{background:#0b1224;padding:.25rem .5rem;border-radius:6px;font-family:ui-monospace,monospace}pre{padding:1rem;overflow-x:auto}.guide-section{margin-top:1.5rem}.guide-section h2{font-size:1.15rem}button{background:#2563eb;color:#fff;border:0;padding:.5rem 1rem;border-radius:6px;cursor:pointer}