body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f1f2f6;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    width: 100%;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2em;
    color: #333;
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.form-container {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

form {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    color: #333;
    resize: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    font-family: 'Courier New', Courier, monospace;
}

textarea:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 8px rgba(0, 123, 255, 0.25);
}

.output-container {
    flex: 1;
    background-color: #f8f9fa;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.output-container h2 {
    margin-top: 0;
    font-size: 1.3em;
    color: #333;
    font-weight: bold;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.output {
    flex: 1;
    background-color: #fff;
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    white-space: pre-wrap;
    overflow-y: auto;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    font-family: 'Courier New', Courier, monospace;
}

.btn {
    background-color: #007bff;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.2);
    text-align: center;
}

.btn:hover {
    background-color: #0056b3;
}

.btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    box-shadow: none;
}