* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
    padding: 30px;
}

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

.converter {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

textarea {
    width: 100%;
    height: 120px;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    resize: none;
    font-size: 14px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 14px;
    border-radius: 5px;
    font-weight: bold;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

.hidden {
    display: none;
}

#result {
    background-color: #f0f9ff;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #0078D7;
}

#errorMessage {
    background-color: #fff0f0;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #D70000;
    color: #D70000;
}

.download-btn {
    display: inline-block;
    background-color: #0078D7;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 10px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.download-btn:hover {
    background-color: #0063b1;
}

h3 {
    margin-bottom: 10px;
    font-size: 16px;
    color: #333;
}