body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
}

.container {
    width: 70%;
    background-color: #ffffff;
    padding: 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h3 {
    text-align: center;
    margin-bottom: 20px;
}

.input-area {
    display: flex;
    justify-content: space-between;
}

input[type="number"] {
    width: 70%;
    padding: 10px;
    border: 1px solid #ccc;
}

button {
    padding: 10px 20px;
    background-color: #333;
    color: #ffffff;
    border: none;
    cursor: pointer;
}

.output-area {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#copyBtn {
    margin-left: 20px;
}