body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    background: #fff;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-radius: 4px;
}

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

label {
    display: block;
    margin-bottom: 8px;
}

input[type="text"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

.output {
    background: #000;
    color: #0f0;
    padding: 10px;
    height: 300px;
    overflow: auto;
    white-space: pre-wrap;
}