* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  height: 100vh;
  overflow: hidden;
}

.main-container {
  display: flex;
  width: 100%;
  height: 100vh;
}

.pane {
  height: 100%;
  overflow: auto;
}

#navPane {
  width: 300px;
  background-color: #f5f5f5;
  border-right: 1px solid #ddd;
}

#resizer {
  width: 5px;
  background-color: #ccc;
  cursor: col-resize;
  user-select: none;
}

#resizer-bar:hover {
  background-color: #999;
}

#contentPane {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fafafa;
}

.photo-view {
  max-width: 100%;
  max-height: 100%;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}