*{box-sizing:border-box;font-family:Arial,sans-serif}
body{margin:0;background:#fff;color:#111}
.screen{min-height:100vh;padding:20px}
.splash{display:flex;align-items:center;justify-content:center;background:#00aa13;color:white;font-size:36px;font-weight:bold}
.card{background:white;border-radius:18px;padding:18px;margin:14px 0;box-shadow:0 2px 10px #ddd}
.green{color:#079b16}
button{width:100%;padding:18px;border:0;border-radius:30px;background:#00a91a;color:white;font-size:20px;font-weight:bold;position:fixed;bottom:20px;left:5%;width:90%}
.row{display:flex;justify-content:space-between}
.amount{font-size:34px;font-weight:bold;color:#079b16;text-align:center}