body {
    background-color: #121212;
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 40px auto;
    padding: 20px;
    background-color: #1e1e1e;
    border-radius: 8px;
    box-shadow: 0 0 10px #00BFFF;
}

h1 {
    text-align: center;
    color: #00BFFF;
}

.options label {
    display: block;
    margin: 10px 0;
}

input[type="number"] {
    width: 60px;
    padding: 5px;
    margin-left: 10px;
}

button {
    background-color: #00BFFF;
    color: #121212;
    border: none;
    padding: 10px 20px;
    margin-top: 15px;
    cursor: pointer;
    font-weight: bold;
    border-radius: 4px;
}

button:hover {
    background-color: #0090cc;
}

.output {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.output input {
    flex: 1;
    padding: 10px;
    font-size: 16px;
    background-color: #2a2a2a;
    color: #ffffff;
    border: 1px solid #444;
    border-radius: 4px;
}