body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 800px;
    margin: auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1, h2 {
    text-align: center;
    color: #333;
}

#drop-area {
    border: 2px dashed #ccc;
    border-radius: 5px;
    padding: 30px;
    text-align: center;
    margin-bottom: 20px;
    cursor: pointer;
    background-color: #f9f9f9;
}

#drop-area.highlight {
    border-color: dodgerblue;
    background-color: #e9f5ff;
}

#drop-area p {
    margin: 0;
    font-size: 1.1em;
}

#file-input {
    display: none; /* Hidden, triggered by clicking drop-area */
}

#file-list-display {
    margin-top: 10px;
    font-style: italic;
    color: #555;
    max-height: 100px;
    overflow-y: auto;
}

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

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

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

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

#clear-btn {
    background-color: #dc3545;
}
#clear-btn:hover {
    background-color: #c82333;
}


#status-area, #results-area {
    margin-top: 20px;
    padding: 15px;
    background-color: #e9ecef;
    border-radius: 5px;
}

#status-message {
    font-weight: bold;
}

#result-files-list a {
    display: block;
    padding: 8px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    margin-bottom: 5px;
    text-align: center;
}

#result-files-list a:hover {
    background-color: #0056b3;
}

#result-files-list p {
    text-align: center;
}

#version-area {
    margin-top: 20px;
    text-align: center;
    padding: 10px;
    border-top: 1px solid #ddd;
}

#version-display {
    font-size: 0.85em;
    color: #888;
    margin: 0;
}