*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,Helvetica,sans-serif;background-color:#000;color:#fff;display:flex;flex-direction:column;align-items:center}h1{padding-top:1rem;font-size:1rem}input{appearance:textfield;font-size:inherit;font-family:inherit;color:inherit;border:none;outline:none;width:2.5rem;text-align:center;background-color:#222;padding:.2rem}input:focus{background-color:#333}input::-webkit-outer-spin-button,input::-webkit-inner-spin-button{-webkit-appearance:none}menu{display:flex;align-items:center;padding-block:1rem;gap:.2rem}