.watermark-container {
  position: relative;
}
.watermark-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 10;
  overflow: hidden;
  border-radius: 1rem;
}
.watermark-text {
  position: absolute;
  font-size: 2.5rem;
  font-weight: bold;
  color: rgba(128, 128, 128, 0.12);
  white-space: nowrap;
  transform: rotate(-25deg);
  user-select: none;
  pointer-events: none;
  font-family: 'Arial', sans-serif;
  letter-spacing: 2px;
}
.watermark-line {
  display: flex;
  justify-content: space-around;
  width: 200%;
  position: absolute;
  left: -50%;
}
.markdown-body {
  user-select: none;
  -webkit-user-select: none;
}
.markdown-body input,
.markdown-body textarea,
.markdown-body a,
.markdown-body button {
  user-select: auto;
  -webkit-user-select: auto;
}
.copy-warning-toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #dc3545;
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  z-index: 9999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  display: none;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
.copy-warning-toast.show {
  display: flex;
  animation: fadeInUp 0.3s ease-out;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}