<!doctype html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><title>:)</title><style>body{margin:0;min-height:100vh;min-height:100dvh;display:grid;place-items:center;background:#fff;color:#222}pre{margin:0;font:clamp(64px,15vw,160px)/1 monospace}</style></head><body><pre role="img" aria-label="Smile">:)</pre></body></html>