:root{color:#20332d;background:#f4f6f2;font-family:system-ui,sans-serif;line-height:1.7}body{margin:0}main{max-width:780px;margin:48px auto;padding:24px}h1{font-size:clamp(1.5rem,5vw,2.3rem)}button,select{font:inherit;max-width:100%;min-height:44px;margin:4px;padding:8px 12px}button{cursor:pointer}:focus-visible{outline-offset:3px;outline:3px solid #167b61}