body {
  font-family: Arial, sans-serif;
  margin: 20px;
}

h1 {
  color: #333;
}

header {
  display: flex;
  flex-direction: column;
  text-align: center;
  margin-bottom: 20px;
}

header h1,
header h3 {
  flex: 1;
  margin: 0;
}

input,
textarea {
  width: 100%;
  padding: 8px;
  margin: 6px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
  max-width: 400px;
}

input[type="file"] {
  display: none;
}

#loading {
  text-align: center;
  margin: 20px;
  font-weight: bold;
  color: #555;
}
.spinner {
  border: 6px solid #f3f3f3;
  border-top: 6px solid #4285F4;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: auto;
}
@keyframes spin { to { transform: rotate(360deg); } }