body {
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    text-align: center;
    width: 300px;
}

.inputs, .selector {
    margin: 20px 0;
}

label {
    margin-right: 10px;
    font-size: 1.1em;
}

h1 {
    margin-bottom: 20px;
}

.output {
    margin-top: 20px;
    font-size: 1.4em;
}