:root{color-scheme:dark;--bg:#0a0710;--card:#16111d;--card2:#1e1728;--text:#f6f1fb;--muted:#b9aebf;--line:#33283e;--accent:#b79cff;--danger:#ffb0b0}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text",system-ui,sans-serif;line-height:1.45}main{width:min(980px,100%);margin:0 auto;padding:calc(env(safe-area-inset-top) + 28px) 18px calc(env(safe-area-inset-bottom) + 40px)}h1{font-size:clamp(2rem,7vw,3.4rem);line-height:1.02;margin:.2rem 0 1rem}h2{margin-top:0}.eyebrow{letter-spacing:.14em;font-weight:800;color:var(--accent);font-size:.78rem}.lede,.note{color:var(--muted)}section{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:18px;margin:16px 0}.testgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.testgrid article{background:var(--card2);border:1px solid var(--line);border-radius:16px;padding:14px}.testgrid article.stress{border-style:dashed}button{appearance:none;border:0;border-radius:12px;padding:12px 15px;font-weight:800;background:var(--accent);color:#130e18;font-size:1rem;touch-action:manipulation}button:disabled{opacity:.45}.secondary{background:#342a3e;color:var(--text)}.buttons{display:flex;gap:10px;flex-wrap:wrap}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#08060b;border:1px solid #2c2335;border-radius:12px;padding:12px;color:#e9dfef;font-size:.78rem;min-height:54px}code{color:#e7d8ff}.samples li{margin:.55rem 0}details{margin-top:14px}summary{cursor:pointer;font-weight:700;margin-bottom:12px}ol{padding-left:1.35rem}