body{margin:0;background:#f6f8f2;color:#183f38;font:1rem/1.5 system-ui}main{max-width:34rem;margin:auto;padding:1.5rem}button,input{box-sizing:border-box;width:100%;min-height:48px;margin:.6rem 0;padding:.8rem;font:inherit;border-radius:.7rem;border:1px solid #667f76}button{background:#176b5b;color:white}button:disabled{opacity:.55}input{font-family:monospace}label{display:block;margin-top:1rem}