body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
background: #f5f7fb;
margin: 0;
padding: 40px 20px;
display: flex;
justify-content: center;
}

.container {
background: white;
width: 100%;
max-width: 750px;
padding: 35px;
border-radius: 12px;
box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

h1 {
margin-top: 0;
text-align: center;
}

.subtitle {
text-align: center;
color: #666;
margin-bottom: 30px;
}

.label {
display: block;
margin-top: 20px;
font-weight: 600;
}

textarea {
width: 100%;
height: 180px;
margin-top: 8px;
padding: 12px;
font-size: 14px;
border-radius: 8px;
border: 1px solid #ccc;
resize: vertical;
}

input[type="file"] {
margin-top: 8px;
}

button {
width: 100%;
margin-top: 25px;
padding: 14px;
font-size: 16px;
border: none;
background: #4f46e5;
color: white;
border-radius: 8px;
cursor: pointer;
transition: background .2s;
}

button:hover {
background: #4338ca;
}

#loading {
text-align: center;
margin-top: 20px;
color: #555;
}

.hidden {
display: none;
}

pre {
background: #0f172a;
color: #e2e8f0;
padding: 18px;
border-radius: 8px;
margin-top: 20px;
white-space: pre-wrap;
font-size: 14px;
}

#statusBar {
margin-top: 20px;
}

#progressContainer {
width: 100%;
height: 10px;
background: #ddd;
border-radius: 6px;
overflow: hidden;
margin-top: 8px;
}

#progressBar {
height: 100%;
width: 0%;
background: #4f46e5;
transition: width 0.4s ease;
}

#statusText {
font-size: 14px;
color: #555;
}

.hidden {
display: none;
}