/* Modal overlay */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
.modal.hidden { display: none; }
.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 0.5rem;
  text-align: center;
  width: 80%;
  max-width: 400px;
}
.progress-bar {
  width: 100%;
  height: 1rem;
  background: #eee;
  border-radius: 0.5rem;
  overflow: hidden;
  margin-top: 0.5rem;
}
.progress-fill {
  width: 0%;
  height: 100%;
  background: #4CAF50;
  transition: width 0.1s ease;
}

/* Main UI */
body {
  font-family: sans-serif;
  background: #f5f5f5;
  margin: 0;
  padding: 2rem;
  display: flex;
  justify-content: center;
}
.container {
  width: 100%;
  max-width: 600px;
  background: white;
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
h1 { margin-top: 0; text-align: center; }
textarea {
  width: 100%; padding: 0.75rem; font-size: 1rem;
  border: 1px solid #ccc; border-radius: 0.25rem; resize: vertical;
}
button {
  margin-top: 1rem; width: 100%; padding: 0.75rem; font-size: 1rem;
  border: none; border-radius: 0.25rem; background: #4CAF50;
  color: white; cursor: pointer;
}
button:disabled {
  background: #aaa; cursor: not-allowed;
}
.loading-text {
  margin-top: 1rem;
  font-style: italic;
  min-height: 1.2em;
}
.hidden { display: none; }
pre {
  margin-top: 1rem; padding: 1rem;
  background: #fafafa; border: 1px solid #ddd;
  border-radius: 0.25rem; white-space: pre-wrap;
}