style.css

body {
    background-color: #FA8072;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
}

.container {
    text-align: center;
    background-color: white;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

input {
    width: 350px;
    height: 40px;
    display: block;
    margin: 20px auto;
    text-align: center;
    border-radius: 5px;
    border: 2px solid #ddd;
    font-size: 18px;
    padding: 5px;
}

#output {
    margin-top: 25px;
    font-size: 24px;
    color: #333;
    background: lightgreen;
    padding: 20px;
    border-radius: 10px;
    display: inline-block;
}

#btn {
    width: 350px;
    height: 50px;
    color: #fff;
    background-color: blue;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    cursor: pointer;
    margin-top: 20px;
}

h1 {
    color: #333;
}

#btn:hover {
    background-color: darkblue;
}