body {
    font-family: 'Helvetica Neue', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    text-align: center;
    color: #0056b3;
}

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

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin: 5px;
    transition: background-color 0.3s;
}

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

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#status {
    font-weight: bold;
    color: #007bff;
}

.output-box {
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 15px;
    min-height: 100px;
    margin-top: 10px;
    white-space: pre-wrap;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copy-btn {
    background-color: #6c757d;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 12px;
}

.copy-btn:hover {
    background-color: #5a6268;
}