:root{--bg:#0f172a;--panel:#111827;--text:#e5e7eb;--accent:#22c55e}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top right,#1f2937,var(--bg));color:var(--text);font-family:IBM Plex Sans,Segoe UI,sans-serif}main{max-width:900px;margin:0 auto;padding:32px 20px}section{background:color-mix(in oklab,var(--panel) 88%,#000);border:1px solid #334155;border-radius:12px;padding:16px;margin-bottom:16px}code{color:#93c5fd}