body{margin:0;font-family:system-ui,sans-serif;background-color:#f1f8e9;color:#333}header{background-color:#2e7d32;color:#fff;padding:1rem 0;text-align:center;box-shadow:0 2px 4px #0000001a}header nav{margin-top:.5rem}header nav a{color:#fff;text-decoration:none;margin:0 1rem;font-weight:500}header nav a:hover{text-decoration:underline}main{flex:1;padding:2rem}footer{background-color:#52bf57;text-align:center;padding:1rem 0;font-size:.9rem}button{background-color:#2e7d32;color:#fff;border:none;border-radius:.75rem;padding:.5rem 1rem;font-size:1rem;cursor:pointer;transition:background-color .2s ease}button:hover{background-color:#276a2b}