* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 40px;
    color: #1a1a1a;
    font-weight: 300;
    font-size: 2.5em;
}

.upload-area {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    background-color: white;
    transition: border-color 0.3s ease;
    margin-bottom: 20px;
}

.upload-area.dragover {
    border-color: #666;
    background-color: #fafafa;
}

.upload-area p {
    margin-bottom: 20px;
    color: #666;
}

#fileInput {
    display: none;
}

.upload-button {
    display: inline-block;
    padding: 12px 24px;
    background-color: #333;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.upload-button:hover {
    background-color: #1a1a1a;
}

#result {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#result.hidden {
    display: none;
}

#output {
    background-color: #f8f8f8;
    padding: 15px;
    border-radius: 4px;
    overflow-x: auto;
    margin: 20px 0;
    font-family: monospace;
}

.download-button {
    display: inline-block;
    padding: 12px 24px;
    background-color: #333;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.download-button:hover {
    background-color: #1a1a1a;
}

.download-button.hidden {
    display: none;
}