* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

.input-group {
    margin-bottom: 20px;
}

.textarea-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

input[type="text"]:focus {
    outline: none;
    border-color: #4CAF50;
}

textarea {
    width: 100%;
    min-height: 300px;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    font-family: 'Courier New', monospace;
    resize: vertical;
}

textarea:focus {
    outline: none;
    border-color: #4CAF50;
}

.download-btn {
    width: 100%;
    padding: 12px 24px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.download-btn:hover {
    background-color: #45a049;
}

.download-btn:active {
    transform: scale(0.98);
}

.back-link {
    display: inline-block;
    margin-bottom: 1rem;
    color: #5368e4;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: #3f51d4;
    text-decoration: underline;
}