:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color-scheme:dark;background:#080808;color:#fff}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:#080808}main{width:min(760px,92vw);text-align:center;padding:48px 24px}h1{font-size:clamp(42px,8vw,76px);line-height:1.02;margin:0 0 28px}p{font-size:clamp(20px,3vw,30px);line-height:1.35;min-height:3em;margin:0 0 34px;color:#d8d8d8}button,input{font:inherit;border-radius:18px;border:1px solid #555}button{width:100%;min-height:86px;font-size:32px;font-weight:700;background:#fff;color:#000;padding:18px 28px}button:disabled{opacity:.45}#pair{margin-top:36px;display:grid;gap:18px}#pair[hidden]{display:none}label{font-size:22px;text-align:left}input{width:100%;font-size:36px;padding:18px;text-align:center;background:#161616;color:#fff}#pairButton{font-size:26px;min-height:72px}