styles.css

#deepseek-pdf-pro-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 99999;
  background: linear-gradient(135deg, #4285f4, #2b6cd4);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-family: 'Helvetica Neue', sans-serif;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  gap: 8px;
}

#deepseek-pdf-pro-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

#deepseek-pdf-pro-btn:active {
  transform: translateY(0);
}

.spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading .spinner {
  display: block;
}

.loading .btn-text {
  display: none;
}