/* container defaults */
.viewer-container {
  position: relative;
  transition: width 0.3s ease, height 0.3s ease;
  margin: 1rem auto;
  border: 2px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
}

/* small vs. large */
.viewer-container.small {
  width: 400px;
  height: 400px;
  top: -10px;
}

.viewer-container.large {
  top: -10px;
  width: 800px;
  height: 500px;
  position: relative;
  left: 10px;

}

/* panel at top of container */
.viewer-panel {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--text-contrast);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 0.5rem;
  z-index: 10;
  height: 40px;
  align-items: center;
  line-height: 5px;
  padding: 2px;
}

#viewermessage {
  margin: 0;
}

/* push the canvas down below the panel */
.viewer-area {
position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 2.5rem;
}

/* make the canvas fill the remaining space */
#viewerCanvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

#toggleSizeBtn {
  font-size: 34px;
  height: 35px;
  width: 35px;
  line-height: 5px;
  padding: 0;
  margin-top: 3px;
  background-color: #d8d8d8;
}

#toggleSizeBtn:hover {
  color: var(--bg-overlay_dark);
}



/* simple centered spinner */
.loader {
  border: 2px solid var(--text-contrast);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: auto; 
  position: absolute;
  top: 40%;
  left: 46.5%;
  width: 50px;
  height: 50px;

}
.loader.hidden {
  display: none;
  top: 50%;
  left: 50%;  
  width: 1rem;
  height: 1rem;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}