body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: #f0f0f0;
}
#controls {
  padding: 15px;
  background-color: #fff;
  border-bottom: 1px solid #ccc;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.step {
  background-color: #007bff;
  color: white;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}
p {
  margin: 0;
}
select,
input,
button {
  padding: 8px;
  border-radius: 4px;
  border: 1px solid #ccc;
  font-size: 14px;
}
button {
  background-color: #28a745;
  color: white;
  border-color: #28a745;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}
button:hover {
  background-color: #218838;
}
button:disabled {
  background-color: #aaa;
  cursor: not-allowed;
}
#pdf-container {
  flex-grow: 1;
  overflow: auto;
  text-align: center;
  padding: 20px;
}
canvas {
  border: 1px solid black;
  cursor: crosshair;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
#status {
  display: flex;
  align-items: center;
  gap: 8px;
}
.loader {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #3498db;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
.cert-selector {
  flex-grow: 1;
}
#selected-file-label {
  font-style: italic;
  color: #555;
  max-width: 150px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: middle;
}