:root{font-family:system-ui,sans-serif;color:#172119;background:#f5f7f6}body{margin:0}main{max-width:760px;margin:3rem auto;padding:2rem;background:#fff;border-radius:16px;box-shadow:0 4px 20px #0001}header{display:flex;justify-content:space-between;align-items:center}input,button,.button{font:inherit;padding:.7rem;margin:.3rem;border-radius:8px;border:1px solid #b7c6bc}button,.button{background:#165c3b;color:#fff;text-decoration:none;cursor:pointer}.code{font-size:2rem;letter-spacing:.15em;font-weight:700}.video-placeholder{height:260px;background:#15231c;color:#fff;display:grid;place-items:center;border-radius:12px}aside{padding:1rem;background:#edf7f0;margin-top:1rem;border-radius:12px}