*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}#app{width:100%;display:flex;justify-content:center;align-items:center}.container{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 10px 40px #0003;max-width:400px;width:90%}h1{color:#333;margin-bottom:1.5rem;text-align:center}.input-group{margin-bottom:1rem}input{width:100%;padding:.75rem;font-size:1rem;border:2px solid #ddd;border-radius:5px;transition:border-color .3s}input:focus{outline:none;border-color:#667eea}button{width:100%;padding:.75rem;font-size:1rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:5px;cursor:pointer;transition:transform .2s,box-shadow .2s}button:hover{transform:translateY(-2px);box-shadow:0 5px 15px #667eea66}button:active{transform:translateY(0)}#output{margin-top:1.5rem;padding:1rem;background:#f8f9fa;border-radius:5px;min-height:50px;color:#333;text-align:center;display:none}#output.show{display:block}footer{position:fixed;bottom:0;left:0;width:100%;padding:1rem;text-align:center;color:#fff;font-size:.9rem;background:#0003;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}