body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6fb;
}

.pyq-section {
  max-width: 900px;
  margin: 40px auto;
  background: #fff;
  padding: 30px;
  border-radius: 14px;
}

h2, h3 {
  text-align: center;
}

.file-list ul {
  list-style: none;
  padding: 0;
}

.file-list li {
  background: #eef2ff;
  padding: 15px;
  margin-bottom: 12px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
}

.file-list li:hover {
  background: #dbeafe;
}

/* ===== FULL PAGE VIEWER ===== */
.viewer {
  display: none;
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 9999;
}

#viewerFrame {
  width: 100%;
  height: calc(100% - 60px);
  border: none;
  background: #fff;
}

.viewer-footer {
  height: 60px;
  background: #111;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.viewer-footer button {
  background: #ef4444;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
}

.viewer-footer a {
  background: #22c55e;
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
}